Bump eslint-plugin-jest from 24.1.3 to 24.1.5 (#320)

Bumps [eslint-plugin-jest](https://github.com/jest-community/eslint-plugin-jest) from 24.1.3 to 24.1.5.
- [Release notes](https://github.com/jest-community/eslint-plugin-jest/releases)
- [Changelog](https://github.com/jest-community/eslint-plugin-jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jest-community/eslint-plugin-jest/compare/v24.1.3...v24.1.5)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.eslintrc.json

@@ -1,52 +1,65 @@
 {
-    "plugins": ["jest", "@typescript-eslint"],
-    "extends": ["plugin:github/recommended"],
-    "parser": "@typescript-eslint/parser",
-    "parserOptions": {
-      "ecmaVersion": 9,
-      "sourceType": "module",
-      "project": "./tsconfig.json"
-    },
-    "rules": {
-      "eslint-comments/no-use": "off",
-      "import/no-namespace": "off",
-      "no-unused-vars": "off",
-      "@typescript-eslint/no-unused-vars": "error",
-      "@typescript-eslint/explicit-member-accessibility": ["error", {"accessibility": "no-public"}],
-      "@typescript-eslint/no-require-imports": "error",
-      "@typescript-eslint/array-type": "error",
-      "@typescript-eslint/await-thenable": "error",
-      "@typescript-eslint/ban-ts-comment": "error",
-      "camelcase": "off",
-      "@typescript-eslint/consistent-type-assertions": "error",
-      "@typescript-eslint/func-call-spacing": ["error", "never"],
-      "@typescript-eslint/no-array-constructor": "error",
-      "@typescript-eslint/no-empty-interface": "error",
-      "@typescript-eslint/no-explicit-any": "off",
-      "@typescript-eslint/no-extraneous-class": "error",
-      "@typescript-eslint/no-for-in-array": "error",
-      "@typescript-eslint/no-inferrable-types": "error",
-      "@typescript-eslint/no-misused-new": "error",
-      "@typescript-eslint/no-namespace": "error",
-      "@typescript-eslint/no-non-null-assertion": "warn",
-      "@typescript-eslint/no-unnecessary-qualifier": "error",
-      "@typescript-eslint/no-unnecessary-type-assertion": "error",
-      "@typescript-eslint/no-useless-constructor": "error",
-      "@typescript-eslint/no-var-requires": "error",
-      "@typescript-eslint/prefer-for-of": "warn",
-      "@typescript-eslint/prefer-function-type": "warn",
-      "@typescript-eslint/prefer-includes": "error",
-      "@typescript-eslint/prefer-string-starts-ends-with": "error",
-      "@typescript-eslint/promise-function-async": "error",
-      "@typescript-eslint/require-array-sort-compare": "error",
-      "@typescript-eslint/restrict-plus-operands": "error",
-      "semi": "off",
-      "@typescript-eslint/type-annotation-spacing": "error",
-      "@typescript-eslint/unbound-method": "off"
-    },
-    "env": {
-      "node": true,
-      "es6": true,
-      "jest/globals": true
-    }
-  }
+  "plugins": ["jest", "@typescript-eslint"],
+  "extends": ["plugin:github/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 9,
+    "sourceType": "module",
+    "project": "./tsconfig.json"
+  },
+  "rules": {
+    "eslint-comments/no-use": "off",
+    "import/no-namespace": "off",
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": "error",
+    "@typescript-eslint/explicit-member-accessibility": [
+      "error",
+      {
+        "accessibility": "no-public"
+      }
+    ],
+    "@typescript-eslint/no-require-imports": "error",
+    "@typescript-eslint/array-type": "error",
+    "@typescript-eslint/await-thenable": "error",
+    "@typescript-eslint/ban-ts-comment": "error",
+    "camelcase": "off",
+    "@typescript-eslint/consistent-type-assertions": "error",
+    "@typescript-eslint/func-call-spacing": ["error", "never"],
+    "@typescript-eslint/no-array-constructor": "error",
+    "@typescript-eslint/no-empty-interface": "error",
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-extraneous-class": "error",
+    "@typescript-eslint/no-for-in-array": "error",
+    "@typescript-eslint/no-inferrable-types": "error",
+    "@typescript-eslint/no-misused-new": "error",
+    "@typescript-eslint/no-namespace": "error",
+    "@typescript-eslint/no-non-null-assertion": "warn",
+    "@typescript-eslint/no-unnecessary-qualifier": "error",
+    "@typescript-eslint/no-unnecessary-type-assertion": "error",
+    "@typescript-eslint/no-useless-constructor": "error",
+    "@typescript-eslint/no-var-requires": "error",
+    "@typescript-eslint/prefer-for-of": "warn",
+    "@typescript-eslint/prefer-function-type": "warn",
+    "@typescript-eslint/prefer-includes": "error",
+    "@typescript-eslint/prefer-string-starts-ends-with": "error",
+    "@typescript-eslint/promise-function-async": "error",
+    "@typescript-eslint/require-array-sort-compare": "error",
+    "@typescript-eslint/restrict-plus-operands": "error",
+    "semi": "off",
+    "@typescript-eslint/type-annotation-spacing": "error",
+    "@typescript-eslint/unbound-method": "off",
+    "no-shadow": "off",
+    "@typescript-eslint/no-shadow": "error",
+    "prettier/prettier": [
+      "error",
+      {
+        "endOfLine": "auto"
+      }
+    ]
+  },
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest/globals": true
+  }
+}

.github/workflows/codeql.yml

@@ -1,4 +1,4 @@
-name: "Code scanning"
+name: 'Code scanning'
 
 on:
   push:
@@ -8,29 +8,16 @@ on:
 
 jobs:
   CodeQL-Build:
-
-    # CodeQL runs on ubuntu-latest and windows-latest
     runs-on: ubuntu-latest
-
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v2
-      with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
-        fetch-depth: 2
+      - name: Checkout repository
+        uses: actions/checkout@v2
 
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
-      
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
 
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v1
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1

.github/workflows/stale.yml

@@ -1,16 +1,16 @@
-name: "Stale issue handler"
+name: 'Stale issue handler'
 on:
   workflow_dispatch:
   schedule:
-  - cron: "0 0 * * *"
+    - cron: '0 0 * * *'
 
 jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v3
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days'
-        days-before-stale: 30
-        days-before-close: 5
+      - uses: actions/stale@main
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days'
+          days-before-stale: 30
+          days-before-close: 5
+          exempt-issue-labels: 'blocked,must,should,keep'

.github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: "Build"
+name: 'Build'
 on: # rebuild any PRs and main branch changes
   pull_request:
   push:
@@ -10,17 +10,16 @@ jobs:
   build: # make sure build/ci work properly
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - run: |
-        npm install
-        npm run all
+      - uses: actions/checkout@v2
+      - run: |
+          npm install
+          npm run all
   test: # make sure the action works on a clean machine without building
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: ./
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'This issue is stale'
-        stale-pr-message: 'This PR is stale'
-        debug-only: true
+      - uses: actions/checkout@v2
+      - uses: ./
+        with:
+          stale-issue-message: 'This issue is stale'
+          stale-pr-message: 'This PR is stale'
+          debug-only: true

.gitignore

@@ -2,3 +2,4 @@
 node_modules/
 lib/
 __tests__/runner/*
+.idea

.licensed.yml

@@ -11,4 +11,4 @@ allowed:
   - unlicense
 
 reviewed:
-  npm:
+  npm:

.prettierignore

@@ -0,0 +1,7 @@
+.idea
+.licenses
+.vscode
+dist
+lib
+node_modules
+package-lock.json

.prettierrc.json

@@ -1,11 +1,11 @@
 {
-    "printWidth": 80,
-    "tabWidth": 2,
-    "useTabs": false,
-    "semi": true,
-    "singleQuote": true,
-    "trailingComma": "none",
-    "bracketSpacing": false,
-    "arrowParens": "avoid",
-    "parser": "typescript"
-  }
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid",
+  "endOfLine": "auto"
+}

.vscode/launch.json

@@ -9,7 +9,7 @@
             "args": [
                 "-i"
             ],
-            "preLaunchTask": "tsc: build - tsconfig.json",
+            "preLaunchTask": "tsc: build - tsconfig.app.json",
             "internalConsoleOptions": "openOnSessionStart",
             "console": "integratedTerminal",
             "outFiles": [
@@ -17,4 +17,4 @@
             ]
         }
     ]
-}
+}

CODEOWNERS

@@ -0,0 +1 @@
+* @actions/actions-runtime

CONTRIBUTING.md

@@ -0,0 +1,19 @@
+### Building and testing
+
+Install the dependencies.
+
+```bash
+$ npm install
+```
+
+Build the typescript and package it for distribution.
+
+```bash
+$ npm run build && npm run pack
+```
+
+Run the tests :heavy_check_mark:
+
+```bash
+$ npm test
+```

README.md

@@ -2,112 +2,215 @@
 
 Warns and then closes issues and PRs that have had no activity for a specified amount of time.
 
-### Building and testing
-
-Install the dependencies  
-```bash
-$ npm install
-```
-
-Build the typescript and package it for distribution
-```bash
-$ npm run build && npm run pack
-```
-
-Run the tests :heavy_check_mark:  
-```bash
-$ npm test
-```
 ### Arguments
 
-| Input  | Description | Usage |
-| :---:     |     :---:   |    :---:   |
-| `repo-token`  | PAT(Personal Access Token) for authorizing repository. | *Required* |
-| `days-before-stale`  | Idle number of days before marking an issue/pr as stale. *Defaults to **60*** | Optional
-| `days-before-close`  | Idle number of days before closing an stale issue/pr. *Defaults to **7*** | Optional
-| `stale-issue-message`  | Message to post on the stale issue. | Optional
-| `stale-pr-message`  | Message to post on the stale pr. | Optional
-| `close-issue-message` | Message to post on the stale issue while closing it. | Optional
-| `close-pr-message`  | Message to post on the stale pr while closing it. | Optional
-| `stale-issue-label`  | Label to apply on the stale issue. *Defaults to **stale*** | Optional
-| `close-issue-label` | Label to apply on closing issue. | Optional
-| `stale-pr-label` | Label to apply on the stale pr. | Optional
-| `close-pr-label` | Label to apply on the closing pr. | Optional
-| `exempt-issue-labels` | Labels on an issue exempted from being marked as stale. | Optional
-| `exempt-pr-labels` | Labels on the pr exempted from being marked as stale. | Optional
-| `only-labels` | Only labels checked for stale issue/pr. | Optional
-| `operations-per-run` | Maximum number of operations per run. *Defaults to **30*** | Optional
-| `remove-stale-when-updated` | Remove stale label from issue/pr on updates or comments. *Defaults to **true*** | Optional
-| `debug-only` | Dry-run on action. *Defaults to **false*** | Optional
-| `ascending` | Order to get issues/pr. *Defaults to **false*** | Optional
-| `skip-stale-issue-message` | Skip adding stale message on stale issue. *Defaults to **false*** | Optional
-| `skip-stale-pr-message` | Skip adding stale message on stale pr. *Defaults to **false*** | Optional
-
+| Input                         | Description                                                                                                     | Usage    |
+| ----------------------------- | --------------------------------------------------------------------------------------------------------------- | -------- |
+| `repo-token`                  | PAT(Personal Access Token) for authorizing repository. _Defaults to **${{ github.token }}**_                    | Optional |
+| `days-before-stale`           | Idle number of days before marking an issue/PR as stale. _Defaults to **60**_                                   | Optional |
+| `days-before-issue-stale`     | Idle number of days before marking an issue as stale (override `days-before-stale`).                            | Optional |
+| `days-before-pr-stale`        | Idle number of days before marking an PR as stale (override `days-before-stale`).                               | Optional |
+| `days-before-close`           | Idle number of days before closing an stale issue/PR. _Defaults to **7**_                                       | Optional |
+| `days-before-issue-close`     | Idle number of days before closing an stale issue (override `days-before-close`).                               | Optional |
+| `days-before-pr-close`        | Idle number of days before closing an stale PR (override `days-before-close`).                                  | Optional |
+| `stale-issue-message`         | Message to post on the stale issue.                                                                             | Optional |
+| `stale-pr-message`            | Message to post on the stale PR.                                                                                | Optional |
+| `close-issue-message`         | Message to post on the stale issue while closing it.                                                            | Optional |
+| `close-pr-message`            | Message to post on the stale PR while closing it.                                                               | Optional |
+| `stale-issue-label`           | Label to apply on the stale issue. _Defaults to **stale**_                                                      | Optional |
+| `close-issue-label`           | Label to apply on closing issue.                                                                                | Optional |
+| `stale-pr-label`              | Label to apply on the stale PR.                                                                                 | Optional |
+| `close-pr-label`              | Label to apply on the closing PR.                                                                               | Optional |
+| `exempt-issue-labels`         | Labels on an issue exempted from being marked as stale.                                                         | Optional |
+| `exempt-pr-labels`            | Labels on the PR exempted from being marked as stale.                                                           | Optional |
+| `exempt-milestones`           | Milestones on an issue or a PR exempted from being marked as stale.                                             | Optional |
+| `exempt-issue-milestones`     | Milestones on an issue exempted from being marked as stale (override `exempt-milestones`).                      | Optional |
+| `exempt-pr-milestones`        | Milestones on the PR exempted from being marked as stale (override `exempt-milestones`).                        | Optional |
+| `exempt-all-milestones`       | Exempt all issues and PRs with milestones from being marked as stale. (priority over `exempt-milestones` rules) | Optional |
+| `exempt-all-issue-milestones` | Exempt all issues with milestones from being marked as stale. (override `exempt-all-milestones`).               | Optional |
+| `exempt-all-pr-milestones`    | Exempt all PRs with milestones from being marked as stale. (override `exempt-all-milestones`).                  | Optional |
+| `only-labels`                 | Only labels checked for stale issue/PR.                                                                         | Optional |
+| `operations-per-run`          | Maximum number of operations per run (GitHub API CRUD related). _Defaults to **30**_                            | Optional |
+| `remove-stale-when-updated`   | Remove stale label from issue/PR on updates or comments. _Defaults to **true**_                                 | Optional |
+| `debug-only`                  | Dry-run on action. _Defaults to **false**_                                                                      | Optional |
+| `ascending`                   | Order to get issues/PR. _Defaults to **false**_                                                                 | Optional |
+| `skip-stale-issue-message`    | Skip adding stale message on stale issue. _Defaults to **false**_                                               | Optional |
+| `skip-stale-pr-message`       | Skip adding stale message on stale PR. _Defaults to **false**_                                                  | Optional |
+| `start-date`                  | The date used to skip the stale action on issue/PR created before it (ISO 8601 or RFC 2822).                    | Optional |
+| `delete-branch`               | Delete the git branch after closing a stale pull request. _Defaults to **false**_                               | Optional |
 
 ### Usage
 
 See [action.yml](./action.yml) For comprehensive list of options.
- 
+
 Basic:
+
 ```yaml
-name: "Close stale issues"
+name: 'Close stale issues and PRs'
 on:
   schedule:
-  - cron: "30 1 * * *"
+    - cron: '30 1 * * *'
 
 jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v3
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'Message to comment on stale issues. If none provided, will not mark issues stale'
-        stale-pr-message: 'Message to comment on stale PRs. If none provided, will not mark PRs stale'
+      - uses: actions/stale@v3
+        with:
+          stale-issue-message: 'Message to comment on stale issues. If none provided, will not mark issues stale'
+          stale-pr-message: 'Message to comment on stale PRs. If none provided, will not mark PRs stale'
 ```
- 
+
 Configure stale timeouts:
+
 ```yaml
-name: "Close stale issues"
+name: 'Close stale issues and PRs'
 on:
   schedule:
-  - cron: "30 1 * * *"
+    - cron: '30 1 * * *'
 
 jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v3
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days'
-        days-before-stale: 30
-        days-before-close: 5
+      - uses: actions/stale@v3
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.'
+          days-before-stale: 30
+          days-before-close: 5
 ```
- 
-Configure labels:
+
+Configure different stale timeouts but never close a PR:
+
 ```yaml
-name: "Close stale issues"
+name: 'Close stale issues and PR'
 on:
   schedule:
-  - cron: "30 1 * * *"
+    - cron: '30 1 * * *'
 
 jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v3
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'Stale issue message'
-        stale-pr-message: 'Stale pull request message'
-        stale-issue-label: 'no-issue-activity'
-        exempt-issue-labels: 'awaiting-approval,work-in-progress'
-        stale-pr-label: 'no-pr-activity'
-        exempt-pr-labels: 'awaiting-approval,work-in-progress'
-        only-labels: 'awaiting-feedback,awaiting-answers'
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.'
+          stale-pr-message: 'This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.'
+          close-issue-message: 'This issue was closed because it has been stalled for 5 days with no activity.'
+          days-before-stale: 30
+          days-before-close: 5
+          days-before-pr-close: -1
+```
+
+Configure different stale timeouts:
+
+```yaml
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.'
+          stale-pr-message: 'This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.'
+          close-issue-message: 'This issue was closed because it has been stalled for 5 days with no activity.'
+          close-pr-message: 'This PR was closed because it has been stalled for 10 days with no activity.'
+          days-before-issue-stale: 30
+          days-before-pr-stale: 45
+          days-before-issue-close: 5
+          days-before-pr-close: 10
+```
+
+Configure labels:
+
+```yaml
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          stale-issue-message: 'Stale issue message'
+          stale-pr-message: 'Stale pull request message'
+          stale-issue-label: 'no-issue-activity'
+          exempt-issue-labels: 'awaiting-approval,work-in-progress'
+          stale-pr-label: 'no-pr-activity'
+          exempt-pr-labels: 'awaiting-approval,work-in-progress'
+          only-labels: 'awaiting-feedback,awaiting-answers'
+```
+
+Configure the stale action to only stale issue/PR created after the 18th april 2020:
+
+```yaml
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          start-date: '2020-18-04T00:00:00Z' // ISO 8601 or RFC 2822
+```
+
+Avoid stale for specific milestones:
+
+```yaml
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          exempt-issue-milestones: 'future,alpha,beta'
+          exempt-pr-milestones: 'bugfix,improvement'
+```
+
+Avoid stale for all PR with milestones:
+
+```yaml
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          exempt-all-pr-milestones: true
 ```
 
 ### Debugging
 
-To see debug output from this action, you must set the secret `ACTIONS_STEP_DEBUG` to `true` in your repository. You can run this action in debug only mode (no actions will be taken on your issues) by passing `debug-only` `true` as an argument to the action.
+To see the debug output from this action, you must set the secret `ACTIONS_STEP_DEBUG` to `true` in your repository.  
+You can run this action in debug only mode (no actions will be taken on your issues and pull requests) by passing `debug-only` to `true` as an argument to the action.  
+You can also increase the maximum number of operations per run by passing `operations-per-run` to `100` for example.  
+Finally, you could also change the cron job frequency in the stale workflow to run stale more often.
+
+### Contributing
+
+You wish to contribute?  
+Check out the [contributing](CONTRIBUTING.md) file before helping us.

__tests__/constants/default-processor-options.ts

@@ -0,0 +1,36 @@
+import {IIssuesProcessorOptions} from '../../src/interfaces/issues-processor-options';
+
+export const DefaultProcessorOptions: IIssuesProcessorOptions = Object.freeze({
+  repoToken: 'none',
+  staleIssueMessage: 'This issue is stale',
+  stalePrMessage: 'This PR is stale',
+  closeIssueMessage: 'This issue is being closed',
+  closePrMessage: 'This PR is being closed',
+  daysBeforeStale: 1,
+  daysBeforeIssueStale: NaN,
+  daysBeforePrStale: NaN,
+  daysBeforeClose: 30,
+  daysBeforeIssueClose: NaN,
+  daysBeforePrClose: NaN,
+  staleIssueLabel: 'Stale',
+  closeIssueLabel: '',
+  exemptIssueLabels: '',
+  stalePrLabel: 'Stale',
+  closePrLabel: '',
+  exemptPrLabels: '',
+  onlyLabels: '',
+  operationsPerRun: 100,
+  debugOnly: true,
+  removeStaleWhenUpdated: false,
+  ascending: false,
+  skipStaleIssueMessage: false,
+  skipStalePrMessage: false,
+  deleteBranch: false,
+  startDate: '',
+  exemptMilestones: '',
+  exemptIssueMilestones: '',
+  exemptPrMilestones: '',
+  exemptAllMilestones: false,
+  exemptAllIssueMilestones: undefined,
+  exemptAllPrMilestones: undefined
+});

__tests__/functions/generate-issue.ts

@@ -0,0 +1,34 @@
+import {Issue} from '../../src/classes/issue';
+import {IIssuesProcessorOptions} from '../../src/interfaces/issues-processor-options';
+import {IsoDateString} from '../../src/types/iso-date-string';
+
+export function generateIssue(
+  options: IIssuesProcessorOptions,
+  id: number,
+  title: string,
+  updatedAt: IsoDateString,
+  createdAt: IsoDateString = updatedAt,
+  isPullRequest = false,
+  labels: string[] = [],
+  isClosed = false,
+  isLocked = false,
+  milestone: string | undefined = undefined
+): Issue {
+  return new Issue(options, {
+    number: id,
+    labels: labels.map(l => {
+      return {name: l};
+    }),
+    title,
+    created_at: createdAt,
+    updated_at: updatedAt,
+    pull_request: isPullRequest ? {} : null,
+    state: isClosed ? 'closed' : 'open',
+    locked: isLocked,
+    milestone: milestone
+      ? {
+          title: milestone
+        }
+      : undefined
+  });
+}

__tests__/main.test.ts

@@ -1,897 +0,0 @@
-import * as core from '@actions/core';
-import * as github from '@actions/github';
-import {Octokit} from '@octokit/rest';
-
-import {
-  IssueProcessor,
-  Issue,
-  Label,
-  IssueProcessorOptions
-} from '../src/IssueProcessor';
-
-function generateIssue(
-  id: number,
-  title: string,
-  updatedAt: string,
-  isPullRequest: boolean = false,
-  labels: string[] = [],
-  isClosed: boolean = false,
-  isLocked: boolean = false
-): Issue {
-  return {
-    number: id,
-    labels: labels.map(l => {
-      return {name: l};
-    }),
-    title: title,
-    updated_at: updatedAt,
-    pull_request: isPullRequest ? {} : null,
-    state: isClosed ? 'closed' : 'open',
-    locked: isLocked
-  };
-}
-
-const DefaultProcessorOptions: IssueProcessorOptions = Object.freeze({
-  repoToken: 'none',
-  staleIssueMessage: 'This issue is stale',
-  stalePrMessage: 'This PR is stale',
-  closeIssueMessage: 'This issue is being closed',
-  closePrMessage: 'This PR is being closed',
-  daysBeforeStale: 1,
-  daysBeforeClose: 30,
-  staleIssueLabel: 'Stale',
-  closeIssueLabel: '',
-  exemptIssueLabels: '',
-  stalePrLabel: 'Stale',
-  closePrLabel: '',
-  exemptPrLabels: '',
-  onlyLabels: '',
-  operationsPerRun: 100,
-  debugOnly: true,
-  removeStaleWhenUpdated: false,
-  ascending: false,
-  skipStaleIssueMessage: false,
-  skipStalePrMessage: false
-});
-
-test('empty issue list results in 1 operation', async () => {
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async () => [],
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  const operationsLeft = await processor.processIssues(1);
-
-  // processing an empty issue list should result in 1 operation
-  expect(operationsLeft).toEqual(99);
-});
-
-test('processing an issue with no label will make it stale and close it, if it is old enough only if days-before-close is set to 0', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z')
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeClose = 0;
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(1);
-  expect(processor.closedIssues.length).toEqual(1);
-});
-
-test('processing an issue with no label will make it stale and not close it if days-before-close is set to > 0', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z')
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeClose = 15;
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(1);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('processing an issue with no label will not make it stale if days-before-stale is set to -1', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z')
-  ];
-
-  const opts = {
-    ...DefaultProcessorOptions,
-    staleIssueMessage: '',
-    daysBeforeStale: -1
-  };
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('processing an issue with no label will make it stale but not close it', async () => {
-  // issue should be from 2 days ago so it will be
-  // stale but not close-able, based on default settings
-  let issueDate = new Date();
-  issueDate.setDate(issueDate.getDate() - 2);
-
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'An issue with no label', issueDate.toDateString())
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(1);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('processing a stale issue will close it', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A stale issue that should be closed',
-      '2020-01-01T17:00:00Z',
-      false,
-      ['Stale']
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(1);
-});
-
-test('processing a stale PR will close it', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A stale PR that should be closed',
-      '2020-01-01T17:00:00Z',
-      true,
-      ['Stale']
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(1);
-});
-
-test('processing a stale issue will close it even if configured not to mark as stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z', false, [
-      'Stale'
-    ])
-  ];
-
-  const opts = {
-    ...DefaultProcessorOptions,
-    daysBeforeStale: -1,
-    staleIssueMessage: ''
-  };
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(1);
-});
-
-test('processing a stale PR will close it even if configured not to mark as stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z', true, [
-      'Stale'
-    ])
-  ];
-
-  const opts = {
-    ...DefaultProcessorOptions,
-    daysBeforeStale: -1,
-    stalePrMessage: ''
-  };
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(1);
-});
-
-test('closed issues will not be marked stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A closed issue that will not be marked',
-      '2020-01-01T17:00:00Z',
-      false,
-      [],
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => []
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('stale closed issues will not be closed', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A stale closed issue',
-      '2020-01-01T17:00:00Z',
-      false,
-      ['Stale'],
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('closed prs will not be marked stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A closed PR that will not be marked',
-      '2020-01-01T17:00:00Z',
-      true,
-      [],
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('stale closed prs will not be closed', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A stale closed PR that will not be closed again',
-      '2020-01-01T17:00:00Z',
-      true,
-      ['Stale'],
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('locked issues will not be marked stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A locked issue that will not be stale',
-      '2020-01-01T17:00:00Z',
-      false,
-      [],
-      false,
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(DefaultProcessorOptions, async p =>
-    p == 1 ? TestIssueList : []
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('stale locked issues will not be closed', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A stale locked issue that will not be closed',
-      '2020-01-01T17:00:00Z',
-      false,
-      ['Stale'],
-      false,
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('locked prs will not be marked stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A locked PR that will not be marked stale',
-      '2020-01-01T17:00:00Z',
-      true,
-      [],
-      false,
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(DefaultProcessorOptions, async p =>
-    p == 1 ? TestIssueList : []
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('stale locked prs will not be closed', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'A stale locked PR that will not be closed',
-      '2020-01-01T17:00:00Z',
-      true,
-      ['Stale'],
-      false,
-      true
-    )
-  ];
-
-  const processor = new IssueProcessor(
-    DefaultProcessorOptions,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('exempt issue labels will not be marked stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'My first issue', '2020-01-01T17:00:00Z', false, [
-      'Exempt'
-    ])
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.exemptIssueLabels = 'Exempt';
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('exempt issue labels will not be marked stale (multi issue label with spaces)', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'My first issue', '2020-01-01T17:00:00Z', false, ['Cool'])
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.exemptIssueLabels = 'Exempt, Cool, None';
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-});
-
-test('exempt issue labels will not be marked stale (multi issue label)', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'My first issue', '2020-01-01T17:00:00Z', false, ['Cool'])
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.exemptIssueLabels = 'Exempt,Cool,None';
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-});
-
-test('exempt pr labels will not be marked stale', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'My first issue', '2020-01-01T17:00:00Z', false, ['Cool']),
-    generateIssue(2, 'My first PR', '2020-01-01T17:00:00Z', true, ['Cool']),
-    generateIssue(3, 'Another issue', '2020-01-01T17:00:00Z', false)
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.exemptIssueLabels = 'Cool';
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.staleIssues.length).toEqual(2); // PR should get processed even though it has an exempt **issue** label
-});
-
-test('stale issues should not be closed if days is set to -1', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(1, 'My first issue', '2020-01-01T17:00:00Z', false, [
-      'Stale'
-    ]),
-    generateIssue(2, 'My first PR', '2020-01-01T17:00:00Z', true, ['Stale']),
-    generateIssue(3, 'Another issue', '2020-01-01T17:00:00Z', false, ['Stale'])
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeClose = -1;
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-});
-
-test('stale label should be removed if a comment was added to a stale issue', async () => {
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should un-stale',
-      '2020-01-01T17:00:00Z',
-      false,
-      ['Stale']
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.removeStaleWhenUpdated = true;
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [{user: {login: 'notme', type: 'User'}}], // return a fake comment to indicate there was an update
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(1);
-});
-
-test('stale label should not be removed if a comment was added by the bot (and the issue should be closed)', async () => {
-  github.context.actor = 'abot';
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should stay stale',
-      '2020-01-01T17:00:00Z',
-      false,
-      ['Stale']
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.removeStaleWhenUpdated = true;
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [{user: {login: 'abot', type: 'User'}}], // return a fake comment to indicate there was an update by the bot
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.closedIssues.length).toEqual(1);
-  expect(processor.staleIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-});
-
-test('stale issues should not be closed until after the closed number of days', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 5);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be marked stale but not closed',
-      lastUpdate.toString(),
-      false
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 1; // closes after 6 days
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(1);
-});
-
-test('stale issues should be closed if the closed nubmer of days (additive) is also passed', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 7);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be stale and closed',
-      lastUpdate.toString(),
-      false,
-      ['Stale']
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 1; // closes after 6 days
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.closedIssues.length).toEqual(1);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(0);
-});
-
-test('stale issues should not be closed until after the closed number of days (long)', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 10);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be marked stale but not closed',
-      lastUpdate.toString(),
-      false
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 20; // closes after 25 days
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // process our fake issue list
-  await processor.processIssues(1);
-
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(1);
-});
-
-test('skips stale message on issues when skip-stale-issue-message is set', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 10);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be marked stale but not closed',
-      lastUpdate.toString(),
-      false
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 20; // closes after 25 days
-  opts.skipStaleIssueMessage = true;
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // for sake of testing, mocking private function
-  const markSpy = jest.spyOn(processor as any, 'markStale');
-
-  await processor.processIssues(1);
-
-  // issue should be staled
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(1);
-
-  // comment should not be created
-  expect(markSpy).toHaveBeenCalledWith(
-    TestIssueList[0],
-    opts.staleIssueMessage,
-    opts.staleIssueLabel,
-    // this option is skipMessage
-    true
-  );
-});
-
-test('skips stale message on prs when skip-stale-pr-message is set', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 10);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be marked stale but not closed',
-      lastUpdate.toString(),
-      true
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 20; // closes after 25 days
-  opts.skipStalePrMessage = true;
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  // for sake of testing, mocking private function
-  const markSpy = jest.spyOn(processor as any, 'markStale');
-
-  await processor.processIssues(1);
-
-  // issue should be staled
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(1);
-
-  // comment should not be created
-  expect(markSpy).toHaveBeenCalledWith(
-    TestIssueList[0],
-    opts.stalePrMessage,
-    opts.stalePrLabel,
-    // this option is skipMessage
-    true
-  );
-});
-
-test('not providing state takes precedence over skipStaleIssueMessage', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 10);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be marked stale but not closed',
-      lastUpdate.toString(),
-      false
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 20; // closes after 25 days
-  opts.skipStalePrMessage = true;
-  opts.staleIssueMessage = '';
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  await processor.processIssues(1);
-
-  // issue should be staled
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(0);
-});
-
-test('not providing stalePrMessage takes precedence over skipStalePrMessage', async () => {
-  let lastUpdate = new Date();
-  lastUpdate.setDate(lastUpdate.getDate() - 10);
-  const TestIssueList: Issue[] = [
-    generateIssue(
-      1,
-      'An issue that should be marked stale but not closed',
-      lastUpdate.toString(),
-      true
-    )
-  ];
-
-  const opts = {...DefaultProcessorOptions};
-  opts.daysBeforeStale = 5; // stale after 5 days
-  opts.daysBeforeClose = 20; // closes after 25 days
-  opts.skipStalePrMessage = true;
-  opts.stalePrMessage = '';
-
-  const processor = new IssueProcessor(
-    opts,
-    async p => (p == 1 ? TestIssueList : []),
-    async (num, dt) => [],
-    async (issue, label) => new Date().toDateString()
-  );
-
-  await processor.processIssues(1);
-
-  // issue should be staled
-  expect(processor.closedIssues.length).toEqual(0);
-  expect(processor.removedLabelIssues.length).toEqual(0);
-  expect(processor.staleIssues.length).toEqual(0);
-});

action.yml

@@ -4,58 +4,122 @@ author: 'GitHub'
 inputs:
   repo-token:
     description: 'Token for the repository. Can be passed in using `{{ secrets.GITHUB_TOKEN }}`.'
-    required: true
+    required: false
+    default: ${{ github.token }}
   stale-issue-message:
     description: 'The message to post on the issue when tagging it. If none provided, will not mark issues stale.'
+    required: false
   stale-pr-message:
-    description: 'The message to post on the pr when tagging it. If none provided, will not mark pull requests stale.'
+    description: 'The message to post on the pull request when tagging it. If none provided, will not mark pull requests stale.'
+    required: false
   close-issue-message:
     description: 'The message to post on the issue when closing it. If none provided, will not comment when closing an issue.'
+    required: false
   close-pr-message:
-    description: 'The message to post on the pr when closing it. If none provided, will not comment when closing a pull requests.'
+    description: 'The message to post on the pull request when closing it. If none provided, will not comment when closing a pull requests.'
+    required: false
   days-before-stale:
-    description: 'The number of days old an issue can be before marking it stale. Set to -1 to never mark issues or pull requests as stale automatically.'
-    default: 60
+    description: 'The number of days old an issue or a pull request can be before marking it stale. Set to -1 to never mark issues or pull requests as stale automatically.'
+    required: false
+    default: '60'
+  days-before-issue-stale:
+    description: 'The number of days old an issue can be before marking it stale. Set to -1 to never mark issues as stale automatically. Override "days-before-stale" option regarding only the issues.'
+    required: false
+  days-before-pr-stale:
+    description: 'The number of days old a pull request can be before marking it stale. Set to -1 to never mark pull requests as stale automatically. Override "days-before-stale" option regarding only the pull requests.'
+    required: false
   days-before-close:
-    description: 'The number of days to wait to close an issue or pull request after it being marked stale. Set to -1 to never close stale issues.'
-    default: 7
+    description: 'The number of days to wait to close an issue or a pull request after it being marked stale. Set to -1 to never close stale issues or pull requests.'
+    required: false
+    default: '7'
+  days-before-issue-close:
+    description: 'The number of days to wait to close an issue after it being marked stale. Set to -1 to never close stale issues. Override "days-before-close" option regarding only the issues.'
+    required: false
+  days-before-pr-close:
+    description: 'The number of days to wait to close a pull request after it being marked stale. Set to -1 to never close stale pull requests. Override "days-before-close" option regarding only the pull requests.'
+    required: false
   stale-issue-label:
     description: 'The label to apply when an issue is stale.'
+    required: false
     default: 'Stale'
   close-issue-label:
     description: 'The label to apply when an issue is closed.'
+    required: false
   exempt-issue-labels:
-    description: 'The labels to apply when an issue is exempt from being marked stale. Separate multiple labels with commas (eg. "label1,label2")'
+    description: 'The labels that mean an issue is exempt from being marked stale. Separate multiple labels with commas (eg. "label1,label2")'
     default: ''
+    required: false
   stale-pr-label:
     description: 'The label to apply when a pull request is stale.'
     default: 'Stale'
+    required: false
   close-pr-label:
     description: 'The label to apply when a pull request is closed.'
+    required: false
   exempt-pr-labels:
-    description: 'The labels to apply when a pull request is exempt from being marked stale. Separate multiple labels with commas (eg. "label1,label2")'
+    description: 'The labels that mean a pull request is exempt from being marked as stale. Separate multiple labels with commas (eg. "label1,label2")'
     default: ''
+    required: false
+  exempt-milestones:
+    description: 'The milestones that mean an issue or a pull request is exempt from being marked as stale. Separate multiple milestones with commas (eg. "milestone1,milestone2")'
+    default: ''
+    required: false
+  exempt-issue-milestones:
+    description: 'The milestones that mean an issue is exempt from being marked as stale. Separate multiple milestones with commas (eg. "milestone1,milestone2"). Override "exempt-milestones" option regarding only the issues.'
+    default: ''
+    required: false
+  exempt-pr-milestones:
+    description: 'The milestones that mean a pull request is exempt from being marked as stale. Separate multiple milestones with commas (eg. "milestone1,milestone2"). Override "exempt-milestones" option regarding only the pull requests.'
+    default: ''
+    required: false
+  exempt-all-milestones:
+    description: 'Exempt all issues and pull requests with milestones from being marked as stale. Default to false.'
+    default: 'false'
+    required: false
+  exempt-all-issue-milestones:
+    description: 'Exempt all issues with milestones from being marked as stale. Override "exempt-all-milestones" option regarding only the issues.'
+    default: ''
+    required: false
+  exempt-all-pr-milestones:
+    description: 'Exempt all pull requests with milestones from being marked as stale. Override "exempt-all-milestones" option regarding only the pull requests.'
+    default: ''
+    required: false
   only-labels:
     description: 'Only issues or pull requests with all of these labels are checked if stale. Defaults to `[]` (disabled) and can be a comma-separated list of labels.'
     default: ''
+    required: false
   operations-per-run:
-    description: 'The maximum number of operations per run, used to control rate limiting.'
-    default: 30
+    description: 'The maximum number of operations per run, used to control rate limiting (GitHub API CRUD related).'
+    default: '30'
+    required: false
   remove-stale-when-updated:
     description: 'Remove stale labels from issues when they are updated or commented on.'
-    default: true
+    default: 'true'
+    required: false
   debug-only:
     description: 'Run the processor in debug mode without actually performing any operations on live issues.'
-    default: false
+    default: 'false'
+    required: false
   ascending:
     description: 'The order to get issues or pull requests. Defaults to false, which is descending'
-    default: false
+    default: 'false'
+    required: false
   skip-stale-pr-message:
     description: 'Skip adding stale message when marking a pull request as stale.'
-    default: false
+    default: 'false'
+    required: false
   skip-stale-issue-message:
     description: 'Skip adding stale message when marking an issue as stale.'
-    default: false
+    default: 'false'
+    required: false
+  delete-branch:
+    description: 'Delete the git branch after closing a stale pull request.'
+    default: 'false'
+    required: false
+  start-date:
+    description: 'The date used to skip the stale action on issue/pull request created before it (ISO 8601 or RFC 2822).'
+    default: ''
+    required: false
 runs:
   using: 'node12'
   main: 'dist/index.js'

jest.config.js

@@ -2,10 +2,10 @@ module.exports = {
   clearMocks: true,
   moduleFileExtensions: ['js', 'ts'],
   testEnvironment: 'node',
-  testMatch: ['**/*.test.ts'],
+  testMatch: ['**/*.test.ts', '**/*.spec.ts'],
   testRunner: 'jest-circus/runner',
   transform: {
     '^.+\\.ts$': 'ts-jest'
   },
   verbose: true
-}
+};

package.json

@@ -5,10 +5,13 @@
   "description": "Marks old issues and PRs as stale",
   "main": "lib/main.js",
   "scripts": {
-    "build": "tsc",
-    "format": "prettier --write **/*.ts",
-    "format-check": "prettier --check **/*.ts",
+    "build": "tsc --project tsconfig.app.json",
+    "format": "prettier --write --ignore-unknown **/*.{md,json,yml,ts}",
+    "format-check": "prettier --check --ignore-unknown **/*.{md,json,yml,ts}",
     "lint": "eslint src/**/*.ts",
+    "lint:fix": "eslint src/**/*.ts --fix",
+    "lint:all": "npm run format-check && npm run lint",
+    "lint:all:fix": "npm run format && npm run lint:fix",
     "pack": "ncc build",
     "test": "jest",
     "all": "npm run build && npm run format && npm run lint && npm run pack && npm test"
@@ -27,23 +30,26 @@
   "dependencies": {
     "@actions/core": "^1.2.6",
     "@actions/github": "^4.0.0",
-    "@octokit/rest": "^18.0.4",
-    "semver": "^7.3.2"
+    "@octokit/rest": "^18.1.1",
+    "lodash.deburr": "^4.1.0",
+    "semver": "^7.3.4"
   },
   "devDependencies": {
-    "@types/semver": "^7.3.1",
-    "@types/jest": "^26.0.10",
-    "@types/node": "^14.10.0",
-    "@typescript-eslint/parser": "^3.10.1",
-    "@vercel/ncc": "^0.24.0",
-    "eslint": "^7.7.0",
+    "@types/jest": "^26.0.20",
+    "@types/lodash.deburr": "^4.1.6",
+    "@types/node": "^14.14.28",
+    "@types/semver": "^7.3.4",
+    "@typescript-eslint/eslint-plugin": "^4.15.1",
+    "@typescript-eslint/parser": "^4.15.1",
+    "@vercel/ncc": "^0.27.0",
+    "eslint": "^7.20.0",
     "eslint-plugin-github": "^4.0.1",
-    "eslint-plugin-jest": "^23.20.0",
-    "jest": "^24.9.0",
-    "jest-circus": "^26.4.2",
-    "js-yaml": "^3.14.0",
-    "prettier": "^2.1.1",
-    "ts-jest": "^24.2.0",
-    "typescript": "^4.0.2"
+    "eslint-plugin-jest": "^24.1.5",
+    "jest": "^26.6.3",
+    "jest-circus": "^26.6.3",
+    "js-yaml": "^4.0.0",
+    "prettier": "^2.2.1",
+    "ts-jest": "^26.5.1",
+    "typescript": "^4.1.5"
   }
 }

src/IssueProcessor.ts

@@ -1,509 +0,0 @@
-import * as core from '@actions/core';
-import {context, getOctokit} from '@actions/github';
-import {GetResponseTypeFromEndpointMethod} from '@octokit/types';
-
-export interface Issue {
-  title: string;
-  number: number;
-  updated_at: string;
-  labels: Label[];
-  pull_request: any;
-  state: string;
-  locked: boolean;
-}
-
-export interface User {
-  type: string;
-  login: string;
-}
-
-export interface Comment {
-  user: User;
-}
-
-export interface IssueEvent {
-  created_at: string;
-  event: string;
-  label: Label;
-}
-
-export interface Label {
-  name: string;
-}
-
-export interface IssueProcessorOptions {
-  repoToken: string;
-  staleIssueMessage: string;
-  stalePrMessage: string;
-  closeIssueMessage: string;
-  closePrMessage: string;
-  daysBeforeStale: number;
-  daysBeforeClose: number;
-  staleIssueLabel: string;
-  closeIssueLabel: string;
-  exemptIssueLabels: string;
-  stalePrLabel: string;
-  closePrLabel: string;
-  exemptPrLabels: string;
-  onlyLabels: string;
-  operationsPerRun: number;
-  removeStaleWhenUpdated: boolean;
-  debugOnly: boolean;
-  ascending: boolean;
-  skipStaleIssueMessage: boolean;
-  skipStalePrMessage: boolean;
-}
-
-/***
- * Handle processing of issues for staleness/closure.
- */
-export class IssueProcessor {
-  readonly client: any; // need to make this the correct type
-  readonly options: IssueProcessorOptions;
-  private operationsLeft = 0;
-
-  readonly staleIssues: Issue[] = [];
-  readonly closedIssues: Issue[] = [];
-  readonly removedLabelIssues: Issue[] = [];
-
-  constructor(
-    options: IssueProcessorOptions,
-    getIssues?: (page: number) => Promise<Issue[]>,
-    listIssueComments?: (
-      issueNumber: number,
-      sinceDate: string
-    ) => Promise<Comment[]>,
-    getLabelCreationDate?: (
-      issue: Issue,
-      label: string
-    ) => Promise<string | undefined>
-  ) {
-    this.options = options;
-    this.operationsLeft = options.operationsPerRun;
-    this.client = getOctokit(options.repoToken);
-
-    if (getIssues) {
-      this.getIssues = getIssues;
-    }
-
-    if (listIssueComments) {
-      this.listIssueComments = listIssueComments;
-    }
-
-    if (getLabelCreationDate) {
-      this.getLabelCreationDate = getLabelCreationDate;
-    }
-
-    if (this.options.debugOnly) {
-      core.warning(
-        'Executing in debug mode. Debug output will be written but no issues will be processed.'
-      );
-    }
-  }
-
-  async processIssues(page = 1): Promise<number> {
-    // get the next batch of issues
-    const issues: Issue[] = await this.getIssues(page);
-    this.operationsLeft -= 1;
-
-    if (issues.length <= 0) {
-      core.info('No more issues found to process. Exiting.');
-      return this.operationsLeft;
-    }
-
-    for (const issue of issues.values()) {
-      const isPr = !!issue.pull_request;
-
-      core.info(
-        `Found issue: issue #${issue.number} last updated ${issue.updated_at} (is pr? ${isPr})`
-      );
-
-      // calculate string based messages for this issue
-      const staleMessage: string = isPr
-        ? this.options.stalePrMessage
-        : this.options.staleIssueMessage;
-      const closeMessage: string = isPr
-        ? this.options.closePrMessage
-        : this.options.closeIssueMessage;
-      const staleLabel: string = isPr
-        ? this.options.stalePrLabel
-        : this.options.staleIssueLabel;
-      const closeLabel: string = isPr
-        ? this.options.closePrLabel
-        : this.options.closeIssueLabel;
-      const exemptLabels = IssueProcessor.parseCommaSeparatedString(
-        isPr ? this.options.exemptPrLabels : this.options.exemptIssueLabels
-      );
-      const skipMessage = isPr
-        ? this.options.skipStalePrMessage
-        : this.options.skipStaleIssueMessage;
-      const issueType: string = isPr ? 'pr' : 'issue';
-      const shouldMarkWhenStale = this.options.daysBeforeStale > -1;
-
-      if (!staleMessage && shouldMarkWhenStale) {
-        core.info(`Skipping ${issueType} due to empty stale message`);
-        continue;
-      }
-
-      if (issue.state === 'closed') {
-        core.info(`Skipping ${issueType} because it is closed`);
-        continue; // don't process closed issues
-      }
-
-      if (issue.locked) {
-        core.info(`Skipping ${issueType} because it is locked`);
-        continue; // don't process locked issues
-      }
-
-      if (
-        exemptLabels.some((exemptLabel: string) =>
-          IssueProcessor.isLabeled(issue, exemptLabel)
-        )
-      ) {
-        core.info(`Skipping ${issueType} because it has an exempt label`);
-        continue; // don't process exempt issues
-      }
-
-      // does this issue have a stale label?
-      let isStale = IssueProcessor.isLabeled(issue, staleLabel);
-
-      // should this issue be marked stale?
-      const shouldBeStale = !IssueProcessor.updatedSince(
-        issue.updated_at,
-        this.options.daysBeforeStale
-      );
-
-      // determine if this issue needs to be marked stale first
-      if (!isStale && shouldBeStale && shouldMarkWhenStale) {
-        core.info(
-          `Marking ${issueType} stale because it was last updated on ${issue.updated_at} and it does not have a stale label`
-        );
-        await this.markStale(issue, staleMessage, staleLabel, skipMessage);
-        isStale = true; // this issue is now considered stale
-      }
-
-      // process the issue if it was marked stale
-      if (isStale) {
-        core.info(`Found a stale ${issueType}`);
-        await this.processStaleIssue(
-          issue,
-          issueType,
-          staleLabel,
-          closeMessage,
-          closeLabel
-        );
-      }
-    }
-
-    if (this.operationsLeft <= 0) {
-      core.warning('Reached max number of operations to process. Exiting.');
-      return 0;
-    }
-
-    // do the next batch
-    return this.processIssues(page + 1);
-  }
-
-  // handle all of the stale issue logic when we find a stale issue
-  private async processStaleIssue(
-    issue: Issue,
-    issueType: string,
-    staleLabel: string,
-    closeMessage?: string,
-    closeLabel?: string
-  ) {
-    const markedStaleOn: string =
-      (await this.getLabelCreationDate(issue, staleLabel)) || issue.updated_at;
-    core.info(`Issue #${issue.number} marked stale on: ${markedStaleOn}`);
-
-    const issueHasComments: boolean = await this.hasCommentsSince(
-      issue,
-      markedStaleOn
-    );
-    core.info(
-      `Issue #${issue.number} has been commented on: ${issueHasComments}`
-    );
-
-    const issueHasUpdate: boolean = IssueProcessor.updatedSince(
-      issue.updated_at,
-      this.options.daysBeforeClose
-    );
-    core.info(`Issue #${issue.number} has been updated: ${issueHasUpdate}`);
-
-    // should we un-stale this issue?
-    if (this.options.removeStaleWhenUpdated && issueHasComments) {
-      core.info(
-        `Issue #${issue.number} is no longer stale. Removing stale label.`
-      );
-      await this.removeLabel(issue, staleLabel);
-    }
-
-    // now start closing logic
-    if (this.options.daysBeforeClose < 0) {
-      return; // nothing to do because we aren't closing stale issues
-    }
-
-    if (!issueHasComments && !issueHasUpdate) {
-      core.info(
-        `Closing ${issueType} because it was last updated on ${issue.updated_at}`
-      );
-      await this.closeIssue(issue, closeMessage, closeLabel);
-    } else {
-      core.info(
-        `Stale ${issueType} is not old enough to close yet (hasComments? ${issueHasComments}, hasUpdate? ${issueHasUpdate}`
-      );
-    }
-  }
-
-  // checks to see if a given issue is still stale (has had activity on it)
-  private async hasCommentsSince(
-    issue: Issue,
-    sinceDate: string
-  ): Promise<boolean> {
-    core.info(
-      `Checking for comments on issue #${issue.number} since ${sinceDate}`
-    );
-
-    if (!sinceDate) {
-      return true;
-    }
-
-    // find any comments since the date
-    const comments = await this.listIssueComments(issue.number, sinceDate);
-
-    const filteredComments = comments.filter(
-      comment =>
-        comment.user.type === 'User' && comment.user.login !== context.actor
-    );
-
-    core.info(
-      `Comments not made by actor or another bot: ${filteredComments.length}`
-    );
-
-    // if there are any user comments returned
-    return filteredComments.length > 0;
-  }
-
-  // grab comments for an issue since a given date
-  private async listIssueComments(
-    issueNumber: number,
-    sinceDate: string
-  ): Promise<Comment[]> {
-    // find any comments since date on the given issue
-    try {
-      const comments = await this.client.issues.listComments({
-        owner: context.repo.owner,
-        repo: context.repo.repo,
-        issue_number: issueNumber,
-        since: sinceDate
-      });
-      return comments.data;
-    } catch (error) {
-      core.error(`List issue comments error: ${error.message}`);
-      return Promise.resolve([]);
-    }
-  }
-
-  // grab issues from github in baches of 100
-  private async getIssues(page: number): Promise<Issue[]> {
-    // generate type for response
-    const endpoint = this.client.issues.listForRepo;
-    type OctoKitIssueList = GetResponseTypeFromEndpointMethod<typeof endpoint>;
-
-    try {
-      const issueResult: OctoKitIssueList = await this.client.issues.listForRepo(
-        {
-          owner: context.repo.owner,
-          repo: context.repo.repo,
-          state: 'open',
-          labels: this.options.onlyLabels,
-          per_page: 100,
-          direction: this.options.ascending ? 'asc' : 'desc',
-          page
-        }
-      );
-      return issueResult.data;
-    } catch (error) {
-      core.error(`Get issues for repo error: ${error.message}`);
-      return Promise.resolve([]);
-    }
-  }
-
-  // Mark an issue as stale with a comment and a label
-  private async markStale(
-    issue: Issue,
-    staleMessage: string,
-    staleLabel: string,
-    skipMessage: boolean
-  ): Promise<void> {
-    core.info(`Marking issue #${issue.number} as stale`);
-
-    this.staleIssues.push(issue);
-
-    this.operationsLeft -= 2;
-
-    // if the issue is being marked stale, the updated date should be changed to right now
-    // so that close calculations work correctly
-    const newUpdatedAtDate: Date = new Date();
-    issue.updated_at = newUpdatedAtDate.toString();
-
-    if (this.options.debugOnly) {
-      return;
-    }
-
-    if (!skipMessage) {
-      try {
-        await this.client.issues.createComment({
-          owner: context.repo.owner,
-          repo: context.repo.repo,
-          issue_number: issue.number,
-          body: staleMessage
-        });
-      } catch (error) {
-        core.error(`Error creating a comment: ${error.message}`);
-      }
-    }
-
-    try {
-      await this.client.issues.addLabels({
-        owner: context.repo.owner,
-        repo: context.repo.repo,
-        issue_number: issue.number,
-        labels: [staleLabel]
-      });
-    } catch (error) {
-      core.error(`Error adding a label: ${error.message}`);
-    }
-  }
-
-  // Close an issue based on staleness
-  private async closeIssue(
-    issue: Issue,
-    closeMessage?: string,
-    closeLabel?: string
-  ): Promise<void> {
-    core.info(`Closing issue #${issue.number} for being stale`);
-
-    this.closedIssues.push(issue);
-
-    this.operationsLeft -= 1;
-
-    if (this.options.debugOnly) {
-      return;
-    }
-
-    if (closeMessage) {
-      try {
-        await this.client.issues.createComment({
-          owner: context.repo.owner,
-          repo: context.repo.repo,
-          issue_number: issue.number,
-          body: closeMessage
-        });
-      } catch (error) {
-        core.error(`Error creating a comment: ${error.message}`);
-      }
-    }
-
-    if (closeLabel) {
-      try {
-        await this.client.issues.addLabels({
-          owner: context.repo.owner,
-          repo: context.repo.repo,
-          issue_number: issue.number,
-          labels: [closeLabel]
-        });
-      } catch (error) {
-        core.error(`Error adding a label: ${error.message}`);
-      }
-    }
-
-    try {
-      await this.client.issues.update({
-        owner: context.repo.owner,
-        repo: context.repo.repo,
-        issue_number: issue.number,
-        state: 'closed'
-      });
-    } catch (error) {
-      core.error(`Error updating an issue: ${error.message}`);
-    }
-  }
-
-  // Remove a label from an issue
-  private async removeLabel(issue: Issue, label: string): Promise<void> {
-    core.info(`Removing label from issue #${issue.number}`);
-
-    this.removedLabelIssues.push(issue);
-
-    this.operationsLeft -= 1;
-
-    if (this.options.debugOnly) {
-      return;
-    }
-
-    try {
-      await this.client.issues.removeLabel({
-        owner: context.repo.owner,
-        repo: context.repo.repo,
-        issue_number: issue.number,
-        name: encodeURIComponent(label) // A label can have a "?" in the name
-      });
-    } catch (error) {
-      core.error(`Error removing a label: ${error.message}`);
-    }
-  }
-
-  // returns the creation date of a given label on an issue (or nothing if no label existed)
-  ///see https://developer.github.com/v3/activity/events/
-  private async getLabelCreationDate(
-    issue: Issue,
-    label: string
-  ): Promise<string | undefined> {
-    core.info(`Checking for label on issue #${issue.number}`);
-
-    this.operationsLeft -= 1;
-
-    const options = this.client.issues.listEvents.endpoint.merge({
-      owner: context.repo.owner,
-      repo: context.repo.repo,
-      per_page: 100,
-      issue_number: issue.number
-    });
-
-    const events: IssueEvent[] = await this.client.paginate(options);
-    const reversedEvents = events.reverse();
-
-    const staleLabeledEvent = reversedEvents.find(
-      event => event.event === 'labeled' && event.label.name === label
-    );
-
-    if (!staleLabeledEvent) {
-      // Must be old rather than labeled
-      return undefined;
-    }
-
-    return staleLabeledEvent.created_at;
-  }
-
-  private static isLabeled(issue: Issue, label: string): boolean {
-    const labelComparer: (l: Label) => boolean = l =>
-      label.localeCompare(l.name, undefined, {sensitivity: 'accent'}) === 0;
-    return issue.labels.filter(labelComparer).length > 0;
-  }
-
-  private static updatedSince(timestamp: string, num_days: number): boolean {
-    const daysInMillis = 1000 * 60 * 60 * 24 * num_days;
-    const millisSinceLastUpdated =
-      new Date().getTime() - new Date(timestamp).getTime();
-
-    return millisSinceLastUpdated <= daysInMillis;
-  }
-
-  private static parseCommaSeparatedString(s: string): string[] {
-    // String.prototype.split defaults to [''] when called on an empty string
-    // In this case, we'd prefer to just return an empty array indicating no labels
-    if (!s.length) return [];
-    return s.split(',').map(l => l.trim());
-  }
-}

src/classes/issue.spec.ts

@@ -0,0 +1,212 @@
+import {IIssue} from '../interfaces/issue';
+import {IIssuesProcessorOptions} from '../interfaces/issues-processor-options';
+import {ILabel} from '../interfaces/label';
+import {IMilestone} from '../interfaces/milestone';
+import {Issue} from './issue';
+
+describe('Issue', (): void => {
+  let issue: Issue;
+  let optionsInterface: IIssuesProcessorOptions;
+  let issueInterface: IIssue;
+
+  beforeEach((): void => {
+    optionsInterface = {
+      ascending: false,
+      closeIssueLabel: '',
+      closeIssueMessage: '',
+      closePrLabel: '',
+      closePrMessage: '',
+      daysBeforeClose: 0,
+      daysBeforeIssueClose: 0,
+      daysBeforeIssueStale: 0,
+      daysBeforePrClose: 0,
+      daysBeforePrStale: 0,
+      daysBeforeStale: 0,
+      debugOnly: false,
+      deleteBranch: false,
+      exemptIssueLabels: '',
+      exemptIssueMilestones: '',
+      exemptMilestones: '',
+      exemptPrLabels: '',
+      exemptPrMilestones: '',
+      onlyLabels: '',
+      operationsPerRun: 0,
+      removeStaleWhenUpdated: false,
+      repoToken: '',
+      skipStaleIssueMessage: false,
+      skipStalePrMessage: false,
+      staleIssueMessage: '',
+      stalePrMessage: '',
+      startDate: undefined,
+      stalePrLabel: 'dummy-stale-pr-label',
+      staleIssueLabel: 'dummy-stale-issue-label',
+      exemptAllMilestones: false,
+      exemptAllIssueMilestones: undefined,
+      exemptAllPrMilestones: undefined
+    };
+    issueInterface = {
+      title: 'dummy-title',
+      number: 8,
+      created_at: 'dummy-created-at',
+      updated_at: 'dummy-updated-at',
+      labels: [
+        {
+          name: 'dummy-name'
+        }
+      ],
+      pull_request: {},
+      state: 'dummy-state',
+      locked: false,
+      milestone: {
+        title: 'dummy-milestone'
+      }
+    };
+    issue = new Issue(optionsInterface, issueInterface);
+  });
+
+  describe('constructor()', (): void => {
+    it('should set the title with the given issue title', (): void => {
+      expect.assertions(1);
+
+      expect(issue.title).toStrictEqual('dummy-title');
+    });
+
+    it('should set the number with the given issue number', (): void => {
+      expect.assertions(1);
+
+      expect(issue.number).toStrictEqual(8);
+    });
+
+    it('should set the created_at with the given issue created_at', (): void => {
+      expect.assertions(1);
+
+      expect(issue.created_at).toStrictEqual('dummy-created-at');
+    });
+
+    it('should set the updated_at with the given issue updated_at', (): void => {
+      expect.assertions(1);
+
+      expect(issue.updated_at).toStrictEqual('dummy-updated-at');
+    });
+
+    it('should set the labels with the given issue labels', (): void => {
+      expect.assertions(1);
+
+      expect(issue.labels).toStrictEqual([
+        {
+          name: 'dummy-name'
+        } as ILabel
+      ]);
+    });
+
+    it('should set the pull_request with the given issue pull_request', (): void => {
+      expect.assertions(1);
+
+      expect(issue.pull_request).toStrictEqual({});
+    });
+
+    it('should set the state with the given issue state', (): void => {
+      expect.assertions(1);
+
+      expect(issue.state).toStrictEqual('dummy-state');
+    });
+
+    it('should set the locked with the given issue locked', (): void => {
+      expect.assertions(1);
+
+      expect(issue.locked).toStrictEqual(false);
+    });
+
+    it('should set the milestone with the given issue milestone', (): void => {
+      expect.assertions(1);
+
+      expect(issue.milestone).toStrictEqual({
+        title: 'dummy-milestone'
+      } as IMilestone);
+    });
+
+    describe('when the given issue pull_request is not set', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = undefined;
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the isPullRequest to false', (): void => {
+        expect.assertions(1);
+
+        expect(issue.isPullRequest).toStrictEqual(false);
+      });
+    });
+
+    describe('when the given issue pull_request is set', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = {};
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the isPullRequest to true', (): void => {
+        expect.assertions(1);
+
+        expect(issue.isPullRequest).toStrictEqual(true);
+      });
+    });
+
+    describe('when the given issue is not a pull request', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = undefined;
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the staleLabel with the given option staleIssueLabel', (): void => {
+        expect.assertions(1);
+
+        expect(issue.staleLabel).toStrictEqual('dummy-stale-issue-label');
+      });
+    });
+
+    describe('when the given issue is a pull request', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = {};
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the staleLabel with the given option stalePrLabel', (): void => {
+        expect.assertions(1);
+
+        expect(issue.staleLabel).toStrictEqual('dummy-stale-pr-label');
+      });
+    });
+
+    describe('when the given issue does not contains the stale label', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = undefined;
+        issueInterface.labels = [];
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the isStale to false', (): void => {
+        expect.assertions(1);
+
+        expect(issue.isStale).toStrictEqual(false);
+      });
+    });
+
+    describe('when the given issue contains the stale label', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = undefined;
+        issueInterface.labels = [
+          {
+            name: 'dummy-stale-issue-label'
+          } as ILabel
+        ];
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the isStale to true', (): void => {
+        expect.assertions(1);
+
+        expect(issue.isStale).toStrictEqual(true);
+      });
+    });
+  });
+});

src/classes/issue.ts

@@ -0,0 +1,49 @@
+import {isLabeled} from '../functions/is-labeled';
+import {isPullRequest} from '../functions/is-pull-request';
+import {IIssue} from '../interfaces/issue';
+import {IIssuesProcessorOptions} from '../interfaces/issues-processor-options';
+import {ILabel} from '../interfaces/label';
+import {IMilestone} from '../interfaces/milestone';
+import {IsoDateString} from '../types/iso-date-string';
+
+export class Issue implements IIssue {
+  private readonly _options: IIssuesProcessorOptions;
+  readonly title: string;
+  readonly number: number;
+  created_at: IsoDateString;
+  updated_at: IsoDateString;
+  readonly labels: ILabel[];
+  readonly pull_request: Object | null | undefined;
+  readonly state: string;
+  readonly locked: boolean;
+  readonly milestone: IMilestone | undefined;
+  readonly isPullRequest: boolean;
+  readonly staleLabel: string;
+  isStale: boolean;
+
+  constructor(
+    options: Readonly<IIssuesProcessorOptions>,
+    issue: Readonly<IIssue>
+  ) {
+    this._options = options;
+    this.title = issue.title;
+    this.number = issue.number;
+    this.created_at = issue.created_at;
+    this.updated_at = issue.updated_at;
+    this.labels = issue.labels;
+    this.pull_request = issue.pull_request;
+    this.state = issue.state;
+    this.locked = issue.locked;
+    this.milestone = issue.milestone;
+
+    this.isPullRequest = isPullRequest(this);
+    this.staleLabel = this._getStaleLabel();
+    this.isStale = isLabeled(this, this.staleLabel);
+  }
+
+  private _getStaleLabel(): string {
+    return this.isPullRequest
+      ? this._options.stalePrLabel
+      : this._options.staleIssueLabel;
+  }
+}

src/classes/issues-processor.ts

@@ -0,0 +1,691 @@
+import {context, getOctokit} from '@actions/github';
+import {GitHub} from '@actions/github/lib/utils';
+import {GetResponseTypeFromEndpointMethod} from '@octokit/types';
+import {IssueType} from '../enums/issue-type';
+import {getHumanizedDate} from '../functions/dates/get-humanized-date';
+import {isDateMoreRecentThan} from '../functions/dates/is-date-more-recent-than';
+import {isValidDate} from '../functions/dates/is-valid-date';
+import {getIssueType} from '../functions/get-issue-type';
+import {isLabeled} from '../functions/is-labeled';
+import {isPullRequest} from '../functions/is-pull-request';
+import {shouldMarkWhenStale} from '../functions/should-mark-when-stale';
+import {wordsToList} from '../functions/words-to-list';
+import {IComment} from '../interfaces/comment';
+import {IIssue} from '../interfaces/issue';
+import {IIssueEvent} from '../interfaces/issue-event';
+import {IIssuesProcessorOptions} from '../interfaces/issues-processor-options';
+import {IPullRequest} from '../interfaces/pull-request';
+import {Issue} from './issue';
+import {IssueLogger} from './loggers/issue-logger';
+import {Logger} from './loggers/logger';
+import {Milestones} from './milestones';
+
+/***
+ * Handle processing of issues for staleness/closure.
+ */
+export class IssuesProcessor {
+  private static _updatedSince(timestamp: string, num_days: number): boolean {
+    const daysInMillis = 1000 * 60 * 60 * 24 * num_days;
+    const millisSinceLastUpdated =
+      new Date().getTime() - new Date(timestamp).getTime();
+
+    return millisSinceLastUpdated <= daysInMillis;
+  }
+
+  private readonly _logger: Logger = new Logger();
+  private _operationsLeft = 0;
+  readonly client: InstanceType<typeof GitHub>;
+  readonly options: IIssuesProcessorOptions;
+  readonly staleIssues: Issue[] = [];
+  readonly closedIssues: Issue[] = [];
+  readonly deletedBranchIssues: Issue[] = [];
+  readonly removedLabelIssues: Issue[] = [];
+
+  constructor(
+    options: IIssuesProcessorOptions,
+    getActor?: () => Promise<string>,
+    getIssues?: (page: number) => Promise<Issue[]>,
+    listIssueComments?: (
+      issueNumber: number,
+      sinceDate: string
+    ) => Promise<IComment[]>,
+    getLabelCreationDate?: (
+      issue: Issue,
+      label: string
+    ) => Promise<string | undefined>
+  ) {
+    this.options = options;
+    this._operationsLeft = options.operationsPerRun;
+    this.client = getOctokit(options.repoToken);
+
+    if (getActor) {
+      this._getActor = getActor;
+    }
+
+    if (getIssues) {
+      this._getIssues = getIssues;
+    }
+
+    if (listIssueComments) {
+      this._listIssueComments = listIssueComments;
+    }
+
+    if (getLabelCreationDate) {
+      this._getLabelCreationDate = getLabelCreationDate;
+    }
+
+    if (this.options.debugOnly) {
+      this._logger.warning(
+        'Executing in debug mode. Debug output will be written but no issues will be processed.'
+      );
+    }
+  }
+
+  async processIssues(page = 1): Promise<number> {
+    // get the next batch of issues
+    const issues: Issue[] = await this._getIssues(page);
+    this._operationsLeft -= 1;
+
+    const actor: string = await this._getActor();
+
+    if (issues.length <= 0) {
+      this._logger.info('---');
+      this._logger.info('No more issues found to process. Exiting.');
+      return this._operationsLeft;
+    }
+
+    for (const issue of issues.values()) {
+      const issueLogger: IssueLogger = new IssueLogger(issue);
+
+      issueLogger.info(
+        `Found issue: issue #${issue.number} last updated ${issue.updated_at} (is pr? ${issue.isPullRequest})`
+      );
+
+      // calculate string based messages for this issue
+      const staleMessage: string = issue.isPullRequest
+        ? this.options.stalePrMessage
+        : this.options.staleIssueMessage;
+      const closeMessage: string = issue.isPullRequest
+        ? this.options.closePrMessage
+        : this.options.closeIssueMessage;
+      const staleLabel: string = issue.isPullRequest
+        ? this.options.stalePrLabel
+        : this.options.staleIssueLabel;
+      const closeLabel: string = issue.isPullRequest
+        ? this.options.closePrLabel
+        : this.options.closeIssueLabel;
+      const skipMessage = issue.isPullRequest
+        ? this.options.skipStalePrMessage
+        : this.options.skipStaleIssueMessage;
+      const issueType: IssueType = getIssueType(issue.isPullRequest);
+      const daysBeforeStale: number = issue.isPullRequest
+        ? this._getDaysBeforePrStale()
+        : this._getDaysBeforeIssueStale();
+
+      if (issue.isPullRequest) {
+        issueLogger.info(`Days before pull request stale: ${daysBeforeStale}`);
+      } else {
+        issueLogger.info(`Days before issue stale: ${daysBeforeStale}`);
+      }
+
+      const shouldMarkAsStale: boolean = shouldMarkWhenStale(daysBeforeStale);
+
+      if (!staleMessage && shouldMarkAsStale) {
+        issueLogger.info(`Skipping ${issueType} due to empty stale message`);
+        continue;
+      }
+
+      if (issue.state === 'closed') {
+        issueLogger.info(`Skipping ${issueType} because it is closed`);
+        continue; // don't process closed issues
+      }
+
+      if (issue.locked) {
+        issueLogger.info(`Skipping ${issueType} because it is locked`);
+        continue; // don't process locked issues
+      }
+
+      if (this.options.startDate) {
+        const startDate: Date = new Date(this.options.startDate);
+        const createdAt: Date = new Date(issue.created_at);
+
+        issueLogger.info(
+          `A start date was specified for the ${getHumanizedDate(startDate)} (${
+            this.options.startDate
+          })`
+        );
+
+        // Expecting that GitHub will always set a creation date on the issues and PRs
+        // But you never know!
+        if (!isValidDate(createdAt)) {
+          throw new Error(
+            `Invalid issue field: "created_at". Expected a valid date`
+          );
+        }
+
+        issueLogger.info(
+          `Issue created the ${getHumanizedDate(createdAt)} (${
+            issue.created_at
+          })`
+        );
+
+        if (!isDateMoreRecentThan(createdAt, startDate)) {
+          issueLogger.info(
+            `Skipping ${issueType} because it was created before the specified start date`
+          );
+
+          continue; // don't process issues which were created before the start date
+        }
+      }
+
+      if (issue.isStale) {
+        issueLogger.info(`This issue has a stale label`);
+      } else {
+        issueLogger.info(`This issue hasn't a stale label`);
+      }
+
+      const exemptLabels: string[] = wordsToList(
+        issue.isPullRequest
+          ? this.options.exemptPrLabels
+          : this.options.exemptIssueLabels
+      );
+
+      if (
+        exemptLabels.some((exemptLabel: Readonly<string>): boolean =>
+          isLabeled(issue, exemptLabel)
+        )
+      ) {
+        if (issue.isStale) {
+          issueLogger.info(`An exempt label was added after the stale label.`);
+          await this._removeStaleLabel(issue, staleLabel);
+        }
+
+        issueLogger.info(
+          `Skipping ${issueType} because it has an exempt label`
+        );
+        continue; // don't process exempt issues
+      }
+
+      const milestones: Milestones = new Milestones(this.options, issue);
+
+      if (milestones.shouldExemptMilestones()) {
+        issueLogger.info(
+          `Skipping ${issueType} because it has an exempt milestone`
+        );
+        continue; // don't process exempt milestones
+      }
+
+      // should this issue be marked stale?
+      const shouldBeStale = !IssuesProcessor._updatedSince(
+        issue.updated_at,
+        daysBeforeStale
+      );
+
+      // determine if this issue needs to be marked stale first
+      if (!issue.isStale && shouldBeStale && shouldMarkAsStale) {
+        issueLogger.info(
+          `Marking ${issueType} stale because it was last updated on ${issue.updated_at} and it does not have a stale label`
+        );
+        await this._markStale(issue, staleMessage, staleLabel, skipMessage);
+        issue.isStale = true; // this issue is now considered stale
+      } else if (!issue.isStale) {
+        issueLogger.info(
+          `Not marking as stale: shouldBeStale=${shouldBeStale}, shouldMarkAsStale=${shouldMarkAsStale}`
+        );
+      }
+
+      // process the issue if it was marked stale
+      if (issue.isStale) {
+        issueLogger.info(`Found a stale ${issueType}`);
+        await this._processStaleIssue(
+          issue,
+          issueType,
+          staleLabel,
+          actor,
+          closeMessage,
+          closeLabel
+        );
+      }
+    }
+
+    if (this._operationsLeft <= 0) {
+      this._logger.warning(
+        'Reached max number of operations to process. Exiting.'
+      );
+      return 0;
+    }
+
+    // do the next batch
+    return this.processIssues(page + 1);
+  }
+
+  // handle all of the stale issue logic when we find a stale issue
+  private async _processStaleIssue(
+    issue: Issue,
+    issueType: IssueType,
+    staleLabel: string,
+    actor: string,
+    closeMessage?: string,
+    closeLabel?: string
+  ) {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+    const markedStaleOn: string =
+      (await this._getLabelCreationDate(issue, staleLabel)) || issue.updated_at;
+    issueLogger.info(
+      `Issue #${issue.number} marked stale on: ${markedStaleOn}`
+    );
+
+    const issueHasComments: boolean = await this._hasCommentsSince(
+      issue,
+      markedStaleOn,
+      actor
+    );
+    issueLogger.info(
+      `Issue #${issue.number} has been commented on: ${issueHasComments}`
+    );
+
+    const isPr: boolean = isPullRequest(issue);
+    const daysBeforeClose: number = isPr
+      ? this._getDaysBeforePrClose()
+      : this._getDaysBeforeIssueClose();
+
+    if (isPr) {
+      issueLogger.info(`Days before pull request close: ${daysBeforeClose}`);
+    } else {
+      issueLogger.info(`Days before issue close: ${daysBeforeClose}`);
+    }
+
+    const issueHasUpdate: boolean = IssuesProcessor._updatedSince(
+      issue.updated_at,
+      daysBeforeClose
+    );
+    issueLogger.info(
+      `Issue #${issue.number} has been updated: ${issueHasUpdate}`
+    );
+
+    // should we un-stale this issue?
+    if (this.options.removeStaleWhenUpdated && issueHasComments) {
+      await this._removeStaleLabel(issue, staleLabel);
+    }
+
+    // now start closing logic
+    if (daysBeforeClose < 0) {
+      return; // nothing to do because we aren't closing stale issues
+    }
+
+    if (!issueHasComments && !issueHasUpdate) {
+      issueLogger.info(
+        `Closing ${issueType} because it was last updated on ${issue.updated_at}`
+      );
+      await this._closeIssue(issue, closeMessage, closeLabel);
+
+      if (this.options.deleteBranch && issue.pull_request) {
+        issueLogger.info(
+          `Deleting branch for #${issue.number} as delete-branch option was specified`
+        );
+        await this._deleteBranch(issue);
+        this.deletedBranchIssues.push(issue);
+      }
+    } else {
+      issueLogger.info(
+        `Stale ${issueType} is not old enough to close yet (hasComments? ${issueHasComments}, hasUpdate? ${issueHasUpdate})`
+      );
+    }
+  }
+
+  // checks to see if a given issue is still stale (has had activity on it)
+  private async _hasCommentsSince(
+    issue: Issue,
+    sinceDate: string,
+    actor: string
+  ): Promise<boolean> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(
+      `Checking for comments on issue #${issue.number} since ${sinceDate}`
+    );
+
+    if (!sinceDate) {
+      return true;
+    }
+
+    // find any comments since the date
+    const comments = await this._listIssueComments(issue.number, sinceDate);
+
+    const filteredComments = comments.filter(
+      comment => comment.user.type === 'User' && comment.user.login !== actor
+    );
+
+    issueLogger.info(
+      `Comments not made by actor or another bot: ${filteredComments.length}`
+    );
+
+    // if there are any user comments returned
+    return filteredComments.length > 0;
+  }
+
+  // grab comments for an issue since a given date
+  private async _listIssueComments(
+    issueNumber: number,
+    sinceDate: string
+  ): Promise<IComment[]> {
+    // find any comments since date on the given issue
+    try {
+      const comments = await this.client.issues.listComments({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        issue_number: issueNumber,
+        since: sinceDate
+      });
+      return comments.data;
+    } catch (error) {
+      this._logger.error(`List issue comments error: ${error.message}`);
+      return Promise.resolve([]);
+    }
+  }
+
+  // get the actor from the GitHub token or context
+  private async _getActor(): Promise<string> {
+    let actor;
+    try {
+      actor = await this.client.users.getAuthenticated();
+    } catch (error) {
+      return context.actor;
+    }
+
+    return actor.data.login;
+  }
+
+  // grab issues from github in batches of 100
+  private async _getIssues(page: number): Promise<Issue[]> {
+    // generate type for response
+    const endpoint = this.client.issues.listForRepo;
+    type OctoKitIssueList = GetResponseTypeFromEndpointMethod<typeof endpoint>;
+
+    try {
+      const issueResult: OctoKitIssueList = await this.client.issues.listForRepo(
+        {
+          owner: context.repo.owner,
+          repo: context.repo.repo,
+          state: 'open',
+          labels: this.options.onlyLabels,
+          per_page: 100,
+          direction: this.options.ascending ? 'asc' : 'desc',
+          page
+        }
+      );
+
+      return issueResult.data.map(
+        (issue: Readonly<IIssue>): Issue => new Issue(this.options, issue)
+      );
+    } catch (error) {
+      this._logger.error(`Get issues for repo error: ${error.message}`);
+      return Promise.resolve([]);
+    }
+  }
+
+  // Mark an issue as stale with a comment and a label
+  private async _markStale(
+    issue: Issue,
+    staleMessage: string,
+    staleLabel: string,
+    skipMessage: boolean
+  ): Promise<void> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(`Marking issue #${issue.number} as stale`);
+
+    this.staleIssues.push(issue);
+
+    this._operationsLeft -= 2;
+
+    // if the issue is being marked stale, the updated date should be changed to right now
+    // so that close calculations work correctly
+    const newUpdatedAtDate: Date = new Date();
+    issue.updated_at = newUpdatedAtDate.toString();
+
+    if (this.options.debugOnly) {
+      return;
+    }
+
+    if (!skipMessage) {
+      try {
+        await this.client.issues.createComment({
+          owner: context.repo.owner,
+          repo: context.repo.repo,
+          issue_number: issue.number,
+          body: staleMessage
+        });
+      } catch (error) {
+        issueLogger.error(`Error creating a comment: ${error.message}`);
+      }
+    }
+
+    try {
+      await this.client.issues.addLabels({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        issue_number: issue.number,
+        labels: [staleLabel]
+      });
+    } catch (error) {
+      issueLogger.error(`Error adding a label: ${error.message}`);
+    }
+  }
+
+  // Close an issue based on staleness
+  private async _closeIssue(
+    issue: Issue,
+    closeMessage?: string,
+    closeLabel?: string
+  ): Promise<void> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(`Closing issue #${issue.number} for being stale`);
+
+    this.closedIssues.push(issue);
+
+    this._operationsLeft -= 1;
+
+    if (this.options.debugOnly) {
+      return;
+    }
+
+    if (closeMessage) {
+      try {
+        await this.client.issues.createComment({
+          owner: context.repo.owner,
+          repo: context.repo.repo,
+          issue_number: issue.number,
+          body: closeMessage
+        });
+      } catch (error) {
+        issueLogger.error(`Error creating a comment: ${error.message}`);
+      }
+    }
+
+    if (closeLabel) {
+      try {
+        await this.client.issues.addLabels({
+          owner: context.repo.owner,
+          repo: context.repo.repo,
+          issue_number: issue.number,
+          labels: [closeLabel]
+        });
+      } catch (error) {
+        issueLogger.error(`Error adding a label: ${error.message}`);
+      }
+    }
+
+    try {
+      await this.client.issues.update({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        issue_number: issue.number,
+        state: 'closed'
+      });
+    } catch (error) {
+      issueLogger.error(`Error updating an issue: ${error.message}`);
+    }
+  }
+
+  private async _getPullRequest(
+    issue: Issue
+  ): Promise<IPullRequest | undefined> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+    this._operationsLeft -= 1;
+
+    try {
+      const pullRequest = await this.client.pulls.get({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        pull_number: issue.number
+      });
+
+      return pullRequest.data;
+    } catch (error) {
+      issueLogger.error(
+        `Error getting pull request ${issue.number}: ${error.message}`
+      );
+    }
+  }
+
+  // Delete the branch on closed pull request
+  private async _deleteBranch(issue: Issue): Promise<void> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(
+      `Delete branch from closed issue #${issue.number} - ${issue.title}`
+    );
+
+    if (this.options.debugOnly) {
+      return;
+    }
+
+    const pullRequest = await this._getPullRequest(issue);
+
+    if (!pullRequest) {
+      issueLogger.info(
+        `Not deleting branch as pull request not found for issue ${issue.number}`
+      );
+      return;
+    }
+
+    const branch = pullRequest.head.ref;
+    issueLogger.info(
+      `Deleting branch ${branch} from closed issue #${issue.number}`
+    );
+
+    this._operationsLeft -= 1;
+
+    try {
+      await this.client.git.deleteRef({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        ref: `heads/${branch}`
+      });
+    } catch (error) {
+      issueLogger.error(
+        `Error deleting branch ${branch} from issue #${issue.number}: ${error.message}`
+      );
+    }
+  }
+
+  // Remove a label from an issue
+  private async _removeLabel(issue: Issue, label: string): Promise<void> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(`Removing label "${label}" from issue #${issue.number}`);
+
+    this.removedLabelIssues.push(issue);
+
+    this._operationsLeft -= 1;
+
+    // @todo remove the debug only to be able to test the code below
+    if (this.options.debugOnly) {
+      return;
+    }
+
+    try {
+      await this.client.issues.removeLabel({
+        owner: context.repo.owner,
+        repo: context.repo.repo,
+        issue_number: issue.number,
+        name: label
+      });
+    } catch (error) {
+      issueLogger.error(`Error removing a label: ${error.message}`);
+    }
+  }
+
+  // returns the creation date of a given label on an issue (or nothing if no label existed)
+  ///see https://developer.github.com/v3/activity/events/
+  private async _getLabelCreationDate(
+    issue: Issue,
+    label: string
+  ): Promise<string | undefined> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(`Checking for label on issue #${issue.number}`);
+
+    this._operationsLeft -= 1;
+
+    const options = this.client.issues.listEvents.endpoint.merge({
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      per_page: 100,
+      issue_number: issue.number
+    });
+
+    const events: IIssueEvent[] = await this.client.paginate(options);
+    const reversedEvents = events.reverse();
+
+    const staleLabeledEvent = reversedEvents.find(
+      event => event.event === 'labeled' && event.label.name === label
+    );
+
+    if (!staleLabeledEvent) {
+      // Must be old rather than labeled
+      return undefined;
+    }
+
+    return staleLabeledEvent.created_at;
+  }
+
+  private _getDaysBeforeIssueStale(): number {
+    return isNaN(this.options.daysBeforeIssueStale)
+      ? this.options.daysBeforeStale
+      : this.options.daysBeforeIssueStale;
+  }
+
+  private _getDaysBeforePrStale(): number {
+    return isNaN(this.options.daysBeforePrStale)
+      ? this.options.daysBeforeStale
+      : this.options.daysBeforePrStale;
+  }
+
+  private _getDaysBeforeIssueClose(): number {
+    return isNaN(this.options.daysBeforeIssueClose)
+      ? this.options.daysBeforeClose
+      : this.options.daysBeforeIssueClose;
+  }
+
+  private _getDaysBeforePrClose(): number {
+    return isNaN(this.options.daysBeforePrClose)
+      ? this.options.daysBeforeClose
+      : this.options.daysBeforePrClose;
+  }
+
+  private async _removeStaleLabel(
+    issue: Issue,
+    staleLabel: Readonly<string>
+  ): Promise<void> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(
+      `Issue #${issue.number} is no longer stale. Removing stale label.`
+    );
+
+    return this._removeLabel(issue, staleLabel);
+  }
+}

src/classes/loggers/issue-logger.spec.ts

@@ -0,0 +1,78 @@
+import {Issue} from '../issue';
+import {IssueLogger} from './issue-logger';
+import * as core from '@actions/core';
+
+describe('IssueLogger', (): void => {
+  let issue: Issue;
+  let issueLogger: IssueLogger;
+
+  beforeEach((): void => {
+    issue = {
+      number: 8
+    } as Issue;
+    issueLogger = new IssueLogger(issue);
+  });
+
+  describe('warning()', (): void => {
+    let message: string;
+
+    let coreWarningSpy: jest.SpyInstance;
+
+    beforeEach((): void => {
+      message = 'dummy-message';
+
+      coreWarningSpy = jest.spyOn(core, 'warning').mockImplementation();
+    });
+
+    it('should log a warning with the given message and with the issue number as prefix', (): void => {
+      expect.assertions(2);
+
+      issueLogger.warning(message);
+
+      expect(coreWarningSpy).toHaveBeenCalledTimes(1);
+      expect(coreWarningSpy).toHaveBeenCalledWith('[#8] dummy-message');
+    });
+  });
+
+  describe('info()', (): void => {
+    let message: string;
+
+    let coreInfoSpy: jest.SpyInstance;
+
+    beforeEach((): void => {
+      message = 'dummy-message';
+
+      coreInfoSpy = jest.spyOn(core, 'info').mockImplementation();
+    });
+
+    it('should log an information with the given message and with the issue number as prefix', (): void => {
+      expect.assertions(2);
+
+      issueLogger.info(message);
+
+      expect(coreInfoSpy).toHaveBeenCalledTimes(1);
+      expect(coreInfoSpy).toHaveBeenCalledWith('[#8] dummy-message');
+    });
+  });
+
+  describe('error()', (): void => {
+    let message: string;
+
+    let coreErrorSpy: jest.SpyInstance;
+
+    beforeEach((): void => {
+      message = 'dummy-message';
+
+      coreErrorSpy = jest.spyOn(core, 'error').mockImplementation();
+    });
+
+    it('should log an error with the given message and with the issue number as prefix', (): void => {
+      expect.assertions(2);
+
+      issueLogger.error(message);
+
+      expect(coreErrorSpy).toHaveBeenCalledTimes(1);
+      expect(coreErrorSpy).toHaveBeenCalledWith('[#8] dummy-message');
+    });
+  });
+});

src/classes/loggers/issue-logger.ts

@@ -0,0 +1,31 @@
+import * as core from '@actions/core';
+import {Issue} from '../issue';
+import {Logger} from './logger';
+
+export class IssueLogger implements Logger {
+  private readonly _issue: Issue;
+
+  constructor(issue: Issue) {
+    this._issue = issue;
+  }
+
+  warning(message: Readonly<string>): void {
+    core.warning(this._prefixWithIssueNumber(message));
+  }
+
+  info(message: Readonly<string>): void {
+    core.info(this._prefixWithIssueNumber(message));
+  }
+
+  error(message: Readonly<string>): void {
+    core.error(this._prefixWithIssueNumber(message));
+  }
+
+  private _prefixWithIssueNumber(message: Readonly<string>): string {
+    return `[#${this._getIssueNumber()}] ${message}`;
+  }
+
+  private _getIssueNumber(): number {
+    return this._issue.number;
+  }
+}

src/classes/loggers/logger.spec.ts

@@ -0,0 +1,73 @@
+import {Logger} from './logger';
+import * as core from '@actions/core';
+
+describe('Logger', (): void => {
+  let logger: Logger;
+
+  beforeEach((): void => {
+    logger = new Logger();
+  });
+
+  describe('warning()', (): void => {
+    let message: string;
+
+    let coreWarningSpy: jest.SpyInstance;
+
+    beforeEach((): void => {
+      message = 'dummy-message';
+
+      coreWarningSpy = jest.spyOn(core, 'warning').mockImplementation();
+    });
+
+    it('should log a warning with the given message', (): void => {
+      expect.assertions(2);
+
+      logger.warning(message);
+
+      expect(coreWarningSpy).toHaveBeenCalledTimes(1);
+      expect(coreWarningSpy).toHaveBeenCalledWith('dummy-message');
+    });
+  });
+
+  describe('info()', (): void => {
+    let message: string;
+
+    let coreInfoSpy: jest.SpyInstance;
+
+    beforeEach((): void => {
+      message = 'dummy-message';
+
+      coreInfoSpy = jest.spyOn(core, 'info').mockImplementation();
+    });
+
+    it('should log an information with the given message', (): void => {
+      expect.assertions(2);
+
+      logger.info(message);
+
+      expect(coreInfoSpy).toHaveBeenCalledTimes(1);
+      expect(coreInfoSpy).toHaveBeenCalledWith('dummy-message');
+    });
+  });
+
+  describe('error()', (): void => {
+    let message: string;
+
+    let coreErrorSpy: jest.SpyInstance;
+
+    beforeEach((): void => {
+      message = 'dummy-message';
+
+      coreErrorSpy = jest.spyOn(core, 'error').mockImplementation();
+    });
+
+    it('should log an error with the given message', (): void => {
+      expect.assertions(2);
+
+      logger.error(message);
+
+      expect(coreErrorSpy).toHaveBeenCalledTimes(1);
+      expect(coreErrorSpy).toHaveBeenCalledWith('dummy-message');
+    });
+  });
+});

src/classes/loggers/logger.ts

@@ -0,0 +1,15 @@
+import * as core from '@actions/core';
+
+export class Logger {
+  warning(message: Readonly<string>): void {
+    core.warning(message);
+  }
+
+  info(message: Readonly<string>): void {
+    core.info(message);
+  }
+
+  error(message: Readonly<string>): void {
+    core.error(message);
+  }
+}

src/classes/milestones.spec.ts

@@ -0,0 +1,599 @@
+import {IIssue} from '../interfaces/issue';
+import {IIssuesProcessorOptions} from '../interfaces/issues-processor-options';
+import {Issue} from './issue';
+import {Milestones} from './milestones';
+
+describe('Milestones', (): void => {
+  let milestones: Milestones;
+  let optionsInterface: IIssuesProcessorOptions;
+  let issue: Issue;
+  let issueInterface: IIssue;
+
+  beforeEach((): void => {
+    optionsInterface = {
+      ascending: false,
+      closeIssueLabel: '',
+      closeIssueMessage: '',
+      closePrLabel: '',
+      closePrMessage: '',
+      daysBeforeClose: 0,
+      daysBeforeIssueClose: 0,
+      daysBeforeIssueStale: 0,
+      daysBeforePrClose: 0,
+      daysBeforePrStale: 0,
+      daysBeforeStale: 0,
+      debugOnly: false,
+      deleteBranch: false,
+      exemptIssueLabels: '',
+      exemptPrLabels: '',
+      onlyLabels: '',
+      operationsPerRun: 0,
+      removeStaleWhenUpdated: false,
+      repoToken: '',
+      skipStaleIssueMessage: false,
+      skipStalePrMessage: false,
+      staleIssueLabel: '',
+      staleIssueMessage: '',
+      stalePrLabel: '',
+      stalePrMessage: '',
+      startDate: undefined,
+      exemptIssueMilestones: '',
+      exemptPrMilestones: '',
+      exemptMilestones: '',
+      exemptAllMilestones: false,
+      exemptAllIssueMilestones: undefined,
+      exemptAllPrMilestones: undefined
+    };
+    issueInterface = {
+      created_at: '',
+      locked: false,
+      milestone: undefined,
+      number: 0,
+      pull_request: undefined,
+      state: '',
+      title: '',
+      updated_at: '',
+      labels: []
+    };
+  });
+
+  describe('shouldExemptMilestones()', (): void => {
+    describe('when the given issue is not a pull request', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = undefined;
+      });
+
+      describe('when the given options are not configured to exempt a milestone', (): void => {
+        beforeEach((): void => {
+          optionsInterface.exemptMilestones = '';
+        });
+
+        describe('when the given options are not configured to exempt an issue milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptIssueMilestones = '';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+        });
+
+        describe('when the given options are configured to exempt an issue milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptIssueMilestones =
+              'dummy-exempt-issue-milestone';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt issue milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt issue milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-issue-milestone'
+              };
+            });
+
+            it('should return true', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(true);
+            });
+          });
+        });
+      });
+
+      describe('when the given options are configured to exempt a milestone', (): void => {
+        beforeEach((): void => {
+          optionsInterface.exemptMilestones = 'dummy-exempt-milestone';
+        });
+
+        describe('when the given options are not configured to exempt an issue milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptIssueMilestones = '';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-milestone'
+              };
+            });
+
+            it('should return true', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(true);
+            });
+          });
+        });
+
+        describe('when the given options are configured to exempt an issue milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptIssueMilestones =
+              'dummy-exempt-issue-milestone';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt issue milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt issue milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-issue-milestone'
+              };
+            });
+
+            it('should return true', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(true);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-milestone'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+        });
+      });
+    });
+
+    describe('when the given issue is a pull request', (): void => {
+      beforeEach((): void => {
+        issueInterface.pull_request = {};
+      });
+
+      describe('when the given options are not configured to exempt a milestone', (): void => {
+        beforeEach((): void => {
+          optionsInterface.exemptMilestones = '';
+        });
+
+        describe('when the given options are not configured to exempt a pull request milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptPrMilestones = '';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+        });
+
+        describe('when the given options are configured to exempt a pull request milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptPrMilestones = 'dummy-exempt-pr-milestone';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt pull request milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt pull request milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-pr-milestone'
+              };
+            });
+
+            it('should return true', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(true);
+            });
+          });
+        });
+      });
+
+      describe('when the given options are configured to exempt a milestone', (): void => {
+        beforeEach((): void => {
+          optionsInterface.exemptMilestones = 'dummy-exempt-milestone';
+        });
+
+        describe('when the given options are not configured to exempt a pull request milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptPrMilestones = '';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-milestone'
+              };
+            });
+
+            it('should return true', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(true);
+            });
+          });
+        });
+
+        describe('when the given options are configured to exempt a pull request milestone', (): void => {
+          beforeEach((): void => {
+            optionsInterface.exemptPrMilestones = 'dummy-exempt-pr-milestone';
+          });
+
+          describe('when the given issue does not have a milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = undefined;
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt pull request milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt pull request milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-pr-milestone'
+              };
+            });
+
+            it('should return true', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(true);
+            });
+          });
+
+          describe('when the given issue does have a milestone different than the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-title'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+
+          describe('when the given issue does have a milestone equaling the exempt milestone', (): void => {
+            beforeEach((): void => {
+              issueInterface.milestone = {
+                title: 'dummy-exempt-milestone'
+              };
+            });
+
+            it('should return false', (): void => {
+              expect.assertions(1);
+              issue = new Issue(optionsInterface, issueInterface);
+              milestones = new Milestones(optionsInterface, issue);
+
+              const result = milestones.shouldExemptMilestones();
+
+              expect(result).toStrictEqual(false);
+            });
+          });
+        });
+      });
+    });
+  });
+});

src/classes/milestones.ts

@@ -0,0 +1,93 @@
+import deburr from 'lodash.deburr';
+import {wordsToList} from '../functions/words-to-list';
+import {IIssuesProcessorOptions} from '../interfaces/issues-processor-options';
+import {Issue} from './issue';
+
+type CleanMilestone = string;
+
+export class Milestones {
+  private static _cleanMilestone(label: Readonly<string>): CleanMilestone {
+    return deburr(label.toLowerCase());
+  }
+
+  private readonly _options: IIssuesProcessorOptions;
+  private readonly _issue: Issue;
+
+  constructor(options: Readonly<IIssuesProcessorOptions>, issue: Issue) {
+    this._options = options;
+    this._issue = issue;
+  }
+
+  shouldExemptMilestones(): boolean {
+    if (this._shouldExemptAllMilestones()) {
+      return true;
+    }
+
+    const exemptMilestones: string[] = this._getExemptMilestones();
+
+    return exemptMilestones.some((exemptMilestone: Readonly<string>): boolean =>
+      this._hasMilestone(exemptMilestone)
+    );
+  }
+
+  private _getExemptMilestones(): string[] {
+    return wordsToList(
+      this._issue.isPullRequest
+        ? this._getExemptPullRequestMilestones()
+        : this._getExemptIssueMilestones()
+    );
+  }
+
+  private _getExemptIssueMilestones(): string {
+    return this._options.exemptIssueMilestones !== ''
+      ? this._options.exemptIssueMilestones
+      : this._options.exemptMilestones;
+  }
+
+  private _getExemptPullRequestMilestones(): string {
+    return this._options.exemptPrMilestones !== ''
+      ? this._options.exemptPrMilestones
+      : this._options.exemptMilestones;
+  }
+
+  private _hasMilestone(milestone: Readonly<string>): boolean {
+    if (!this._issue.milestone) {
+      return false;
+    }
+
+    return (
+      Milestones._cleanMilestone(milestone) ===
+      Milestones._cleanMilestone(this._issue.milestone.title)
+    );
+  }
+
+  private _shouldExemptAllMilestones(): boolean {
+    if (this._issue.milestone) {
+      return this._issue.isPullRequest
+        ? this._shouldExemptAllPullRequestMilestones()
+        : this._shouldExemptAllIssueMilestones();
+    }
+
+    return false;
+  }
+
+  private _shouldExemptAllIssueMilestones(): boolean {
+    if (this._options.exemptAllIssueMilestones === true) {
+      return true;
+    } else if (this._options.exemptAllIssueMilestones === false) {
+      return false;
+    }
+
+    return this._options.exemptAllMilestones;
+  }
+
+  private _shouldExemptAllPullRequestMilestones(): boolean {
+    if (this._options.exemptAllPrMilestones === true) {
+      return true;
+    } else if (this._options.exemptAllPrMilestones === false) {
+      return false;
+    }
+
+    return this._options.exemptAllMilestones;
+  }
+}

src/enums/issue-type.ts

@@ -0,0 +1,4 @@
+export enum IssueType {
+  Issue = 'issue',
+  PullRequest = 'pr'
+}

src/functions/dates/get-humanized-date.spec.ts

@@ -0,0 +1,33 @@
+import {getHumanizedDate} from './get-humanized-date';
+
+describe('getHumanizedDate()', (): void => {
+  let date: Date;
+
+  describe('when the given date is the 1st of april 2020', (): void => {
+    beforeEach((): void => {
+      date = new Date(2020, 3, 1);
+    });
+
+    it('should return the date formatted as DD-MM-YYYY', (): void => {
+      expect.assertions(1);
+
+      const result = getHumanizedDate(date);
+
+      expect(result).toStrictEqual('01-04-2020');
+    });
+  });
+
+  describe('when the given date is the 18st of december 2020', (): void => {
+    beforeEach((): void => {
+      date = new Date(2020, 11, 18);
+    });
+
+    it('should return the date formatted as DD-MM-YYYY', (): void => {
+      expect.assertions(1);
+
+      const result = getHumanizedDate(date);
+
+      expect(result).toStrictEqual('18-12-2020');
+    });
+  });
+});

src/functions/dates/get-humanized-date.ts

@@ -0,0 +1,17 @@
+import {HumanizedDate} from '../../types/humanized-date';
+
+export function getHumanizedDate(date: Readonly<Date>): HumanizedDate {
+  const year: number = date.getFullYear();
+  let month = `${date.getMonth() + 1}`;
+  let day = `${date.getDate()}`;
+
+  if (month.length < 2) {
+    month = `0${month}`;
+  }
+
+  if (day.length < 2) {
+    day = `0${day}`;
+  }
+
+  return [day, month, year].join('-');
+}

src/functions/dates/is-date-more-recent-than.spec.ts

@@ -0,0 +1,51 @@
+import {isDateMoreRecentThan} from './is-date-more-recent-than';
+
+describe('isDateMoreRecentThan()', (): void => {
+  let date: Date;
+  let comparedDate: Date;
+
+  describe('when the given date is older than the compared date', (): void => {
+    beforeEach((): void => {
+      date = new Date(2020, 0, 20);
+      comparedDate = new Date(2021, 0, 20);
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = isDateMoreRecentThan(date, comparedDate);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe('when the given date is equal to the compared date', (): void => {
+    beforeEach((): void => {
+      date = new Date(2020, 0, 20);
+      comparedDate = new Date(2020, 0, 20);
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = isDateMoreRecentThan(date, comparedDate);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe('when the given date is more recent than the compared date', (): void => {
+    beforeEach((): void => {
+      date = new Date(2021, 0, 20);
+      comparedDate = new Date(2020, 0, 20);
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = isDateMoreRecentThan(date, comparedDate);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+});

src/functions/dates/is-date-more-recent-than.ts

@@ -0,0 +1,6 @@
+export function isDateMoreRecentThan(
+  date: Readonly<Date>,
+  comparedDate: Readonly<Date>
+): boolean {
+  return date > comparedDate;
+}

src/functions/dates/is-valid-date.spec.ts

@@ -0,0 +1,61 @@
+import {isValidDate} from './is-valid-date';
+
+describe('isValidDate()', (): void => {
+  let date: Date;
+
+  describe('when the given date is an invalid date', (): void => {
+    beforeEach((): void => {
+      date = new Date('16-04-1994');
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = isValidDate(date);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe('when the given date is a new date', (): void => {
+    beforeEach((): void => {
+      date = new Date();
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = isValidDate(date);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+
+  describe('when the given date is an ISO and valid date', (): void => {
+    beforeEach((): void => {
+      date = new Date('2011-04-22T13:33:48Z');
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = isValidDate(date);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+
+  describe('when the given date is an ISO with ms and valid date', (): void => {
+    beforeEach((): void => {
+      date = new Date('2011-10-05T14:48:00.000Z');
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = isValidDate(date);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+});

src/functions/dates/is-valid-date.ts

@@ -0,0 +1,18 @@
+/**
+ * @description
+ * Check if a date is valid
+ *
+ * @see
+ * https://stackoverflow.com/a/1353711/4440414
+ *
+ * @param {Readonly<Date>} date The date to check
+ *
+ * @returns {boolean} true when the given date is valid
+ */
+export function isValidDate(date: Readonly<Date>): boolean {
+  if (Object.prototype.toString.call(date) === '[object Date]') {
+    return !isNaN(date.getTime());
+  }
+
+  return false;
+}

src/functions/get-issue-type.spec.ts

@@ -0,0 +1,33 @@
+import {getIssueType} from './get-issue-type';
+
+describe('getIssueType()', (): void => {
+  let isPullRequest: boolean;
+
+  describe('when the issue is a not pull request', (): void => {
+    beforeEach((): void => {
+      isPullRequest = false;
+    });
+
+    it('should return that the issue is really an issue', (): void => {
+      expect.assertions(1);
+
+      const result = getIssueType(isPullRequest);
+
+      expect(result).toStrictEqual('issue');
+    });
+  });
+
+  describe('when the issue is a pull request', (): void => {
+    beforeEach((): void => {
+      isPullRequest = true;
+    });
+
+    it('should return that the issue is a pull request', (): void => {
+      expect.assertions(1);
+
+      const result = getIssueType(isPullRequest);
+
+      expect(result).toStrictEqual('pr');
+    });
+  });
+});

src/functions/get-issue-type.ts

@@ -0,0 +1,5 @@
+import {IssueType} from '../enums/issue-type';
+
+export function getIssueType(isPullRequest: Readonly<boolean>): IssueType {
+  return isPullRequest ? IssueType.PullRequest : IssueType.Issue;
+}

src/functions/is-labeled.spec.ts

@@ -0,0 +1,187 @@
+import {Issue} from '../classes/issue';
+import {isLabeled} from './is-labeled';
+
+describe('isLabeled()', (): void => {
+  let issue: Issue;
+  let label: string;
+
+  describe('when the given issue contains no label', (): void => {
+    beforeEach((): void => {
+      issue = ({
+        labels: []
+      } as unknown) as Issue;
+    });
+
+    describe('when the given label is a simple label', (): void => {
+      beforeEach((): void => {
+        label = 'label';
+      });
+
+      it('should return false', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(false);
+      });
+    });
+  });
+
+  describe('when the given issue contains a simple label', (): void => {
+    beforeEach((): void => {
+      issue = {
+        labels: [
+          {
+            name: 'label'
+          }
+        ]
+      } as Issue;
+    });
+
+    describe('when the given label is a simple label', (): void => {
+      beforeEach((): void => {
+        label = 'label';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+  });
+
+  describe('when the given issue contains a kebab case label', (): void => {
+    beforeEach((): void => {
+      issue = {
+        labels: [
+          {
+            name: 'kebab-case-label'
+          }
+        ]
+      } as Issue;
+    });
+
+    describe('when the given label is a kebab case label', (): void => {
+      beforeEach((): void => {
+        label = 'kebab-case-label';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+  });
+
+  describe('when the given issue contains a multiple word label', (): void => {
+    beforeEach((): void => {
+      issue = {
+        labels: [
+          {
+            name: 'label like a sentence'
+          }
+        ]
+      } as Issue;
+    });
+
+    describe('when the given label is a multiple word label', (): void => {
+      beforeEach((): void => {
+        label = 'label like a sentence';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+  });
+
+  describe('when the given issue contains a multiple word label with %20 spaces', (): void => {
+    beforeEach((): void => {
+      issue = {
+        labels: [
+          {
+            name: 'label%20like%20a%20sentence'
+          }
+        ]
+      } as Issue;
+    });
+
+    describe('when the given label is a multiple word label with %20 spaces', (): void => {
+      beforeEach((): void => {
+        label = 'label%20like%20a%20sentence';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+  });
+
+  describe('when the given issue contains a label wih diacritical marks', (): void => {
+    beforeEach((): void => {
+      issue = {
+        labels: [
+          {
+            name: 'déjà vu'
+          }
+        ]
+      } as Issue;
+    });
+
+    describe('when the given issue contains a label', (): void => {
+      beforeEach((): void => {
+        label = 'deja vu';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+
+    describe('when the given issue contains an uppercase label', (): void => {
+      beforeEach((): void => {
+        label = 'DEJA VU';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+
+    describe('when the given issue contains a label wih diacritical marks', (): void => {
+      beforeEach((): void => {
+        label = 'déjà vu';
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isLabeled(issue, label);
+
+        expect(result).toStrictEqual(true);
+      });
+    });
+  });
+});

src/functions/is-labeled.ts

@@ -0,0 +1,26 @@
+import deburr from 'lodash.deburr';
+import {Issue} from '../classes/issue';
+import {ILabel} from '../interfaces/label';
+import {CleanLabel} from '../types/clean-label';
+
+/**
+ * @description
+ * Check if the given label is listed as a label of the given issue
+ *
+ * @param {Readonly<Issue>} issue A GitHub issue containing some labels
+ * @param {Readonly<string>} label The label to check the presence with
+ *
+ * @return {boolean} Return true when the given label is also in the given issue labels
+ */
+export function isLabeled(
+  issue: Readonly<Issue>,
+  label: Readonly<string>
+): boolean {
+  return !!issue.labels.find((issueLabel: Readonly<ILabel>): boolean => {
+    return cleanLabel(label) === cleanLabel(issueLabel.name);
+  });
+}
+
+function cleanLabel(label: Readonly<string>): CleanLabel {
+  return deburr(label.toLowerCase());
+}

src/functions/is-pull-request.spec.ts

@@ -0,0 +1,57 @@
+import {Issue} from '../classes/issue';
+import {isPullRequest} from './is-pull-request';
+
+describe('isPullRequest()', (): void => {
+  let issue: Issue;
+
+  describe('when the given issue has an undefined pull request', (): void => {
+    beforeEach((): void => {
+      issue = {
+        pull_request: undefined
+      } as Issue;
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = isPullRequest(issue);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe('when the given issue has a null pull request', (): void => {
+    beforeEach((): void => {
+      issue = {
+        pull_request: null
+      } as Issue;
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = isPullRequest(issue);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe.each([{}, true])(
+    'when the given issue has pull request',
+    (value): void => {
+      beforeEach((): void => {
+        issue = {
+          pull_request: value
+        } as Issue;
+      });
+
+      it('should return true', (): void => {
+        expect.assertions(1);
+
+        const result = isPullRequest(issue);
+
+        expect(result).toStrictEqual(true);
+      });
+    }
+  );
+});

src/functions/is-pull-request.ts

@@ -0,0 +1,5 @@
+import {Issue} from '../classes/issue';
+
+export function isPullRequest(issue: Readonly<Issue>): boolean {
+  return !!issue.pull_request;
+}

src/functions/should-mark-when-stale.spec.ts

@@ -0,0 +1,47 @@
+import {shouldMarkWhenStale} from './should-mark-when-stale';
+
+describe('shouldMarkWhenStale()', (): void => {
+  let daysBeforeStale: number;
+
+  describe('when the given number of days indicate that it should be stalled', (): void => {
+    beforeEach((): void => {
+      daysBeforeStale = -1;
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = shouldMarkWhenStale(daysBeforeStale);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe('when the given number of days indicate that it should be stalled today', (): void => {
+    beforeEach((): void => {
+      daysBeforeStale = 0;
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = shouldMarkWhenStale(daysBeforeStale);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+
+  describe('when the given number of days indicate that it should be stalled tomorrow', (): void => {
+    beforeEach((): void => {
+      daysBeforeStale = 1;
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = shouldMarkWhenStale(daysBeforeStale);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+});

src/functions/should-mark-when-stale.ts

@@ -0,0 +1,5 @@
+export function shouldMarkWhenStale(
+  daysBeforeStale: Readonly<number>
+): boolean {
+  return daysBeforeStale >= 0;
+}

src/functions/words-to-list.spec.ts

@@ -0,0 +1,137 @@
+import {wordsToList} from './words-to-list';
+
+describe('wordsToList()', (): void => {
+  let words: string;
+
+  describe('when the given words is empty', (): void => {
+    beforeEach((): void => {
+      words = '';
+    });
+
+    it('should return an empty list of words', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual([]);
+    });
+  });
+
+  describe('when the given words is a simple word', (): void => {
+    beforeEach((): void => {
+      words = 'word';
+    });
+
+    it('should return a list of one word', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual(['word']);
+    });
+  });
+
+  describe('when the given words is a word with extra spaces before and after', (): void => {
+    beforeEach((): void => {
+      words = '   word   ';
+    });
+
+    it('should return a list of one word and remove all spaces before and after', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual(['word']);
+    });
+  });
+
+  describe('when the given words is a kebab case word', (): void => {
+    beforeEach((): void => {
+      words = 'kebab-case-word';
+    });
+
+    it('should return a list of one word', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual(['kebab-case-word']);
+    });
+  });
+
+  describe('when the given words is two kebab case words separated with a comma', (): void => {
+    beforeEach((): void => {
+      words = 'kebab-case-word-1,kebab-case-word-2';
+    });
+
+    it('should return a list of two words', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual(['kebab-case-word-1', 'kebab-case-word-2']);
+    });
+  });
+
+  describe('when the given words is a multiple word word', (): void => {
+    beforeEach((): void => {
+      words = 'word like a sentence';
+    });
+
+    it('should return a list of one word', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual(['word like a sentence']);
+    });
+  });
+
+  describe('when the given words is two multiple word words separated with a comma', (): void => {
+    beforeEach((): void => {
+      words = 'word like a sentence, another word like a sentence';
+    });
+
+    it('should return a list of two words', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual([
+        'word like a sentence',
+        'another word like a sentence'
+      ]);
+    });
+  });
+
+  describe('when the given words is a multiple word word with %20 spaces', (): void => {
+    beforeEach((): void => {
+      words = 'word%20like%20a%20sentence';
+    });
+
+    it('should return a list of one word', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual(['word%20like%20a%20sentence']);
+    });
+  });
+
+  describe('when the given words is two multiple word words with %20 spaces separated with a comma', (): void => {
+    beforeEach((): void => {
+      words = 'word%20like%20a%20sentence,another%20word%20like%20a%20sentence';
+    });
+
+    it('should return a list of two words', (): void => {
+      expect.assertions(1);
+
+      const result = wordsToList(words);
+
+      expect(result).toStrictEqual([
+        'word%20like%20a%20sentence',
+        'another%20word%20like%20a%20sentence'
+      ]);
+    });
+  });
+});

src/functions/words-to-list.ts

@@ -0,0 +1,23 @@
+/**
+ * @description
+ * Transform a string of comma separated words
+ * to an array of words
+ *
+ * @example
+ * wordsToList('label') => ['label']
+ * wordsToList('label,label') => ['label', 'label']
+ * wordsToList('kebab-label') => ['kebab-label']
+ * wordsToList('kebab%20label') => ['kebab%20label']
+ * wordsToList('label with words') => ['label with words']
+ *
+ * @param {Readonly<string>} words A string of comma separated words
+ *
+ * @return {string[]} A list of words
+ */
+export function wordsToList(words: Readonly<string>): string[] {
+  if (!words.length) {
+    return [];
+  }
+
+  return words.split(',').map((word: Readonly<string>): string => word.trim());
+}

src/interfaces/comment.ts

@@ -0,0 +1,5 @@
+import {IUser} from './user';
+
+export interface IComment {
+  user: IUser;
+}

src/interfaces/issue-event.ts

@@ -0,0 +1,7 @@
+import {ILabel} from './label';
+
+export interface IIssueEvent {
+  created_at: string;
+  event: string;
+  label: ILabel;
+}

src/interfaces/issue.ts

@@ -0,0 +1,15 @@
+import {IsoDateString} from '../types/iso-date-string';
+import {ILabel} from './label';
+import {IMilestone} from './milestone';
+
+export interface IIssue {
+  title: string;
+  number: number;
+  created_at: IsoDateString;
+  updated_at: IsoDateString;
+  labels: ILabel[];
+  pull_request: Object | null | undefined;
+  state: string;
+  locked: boolean;
+  milestone: IMilestone | undefined;
+}

src/interfaces/issues-processor-options.ts

@@ -0,0 +1,36 @@
+import {IsoOrRfcDateString} from '../types/iso-or-rfc-date-string';
+
+export interface IIssuesProcessorOptions {
+  repoToken: string;
+  staleIssueMessage: string;
+  stalePrMessage: string;
+  closeIssueMessage: string;
+  closePrMessage: string;
+  daysBeforeStale: number;
+  daysBeforeIssueStale: number; // Could be NaN
+  daysBeforePrStale: number; // Could be NaN
+  daysBeforeClose: number;
+  daysBeforeIssueClose: number; // Could be NaN
+  daysBeforePrClose: number; // Could be NaN
+  staleIssueLabel: string;
+  closeIssueLabel: string;
+  exemptIssueLabels: string;
+  stalePrLabel: string;
+  closePrLabel: string;
+  exemptPrLabels: string;
+  onlyLabels: string;
+  operationsPerRun: number;
+  removeStaleWhenUpdated: boolean;
+  debugOnly: boolean;
+  ascending: boolean;
+  skipStaleIssueMessage: boolean;
+  skipStalePrMessage: boolean;
+  deleteBranch: boolean;
+  startDate: IsoOrRfcDateString | undefined; // Should be ISO 8601 or RFC 2822
+  exemptMilestones: string;
+  exemptIssueMilestones: string;
+  exemptPrMilestones: string;
+  exemptAllMilestones: boolean;
+  exemptAllIssueMilestones: boolean | undefined;
+  exemptAllPrMilestones: boolean | undefined;
+}

src/interfaces/label.ts

@@ -0,0 +1,3 @@
+export interface ILabel {
+  name: string;
+}

src/interfaces/milestone.ts

@@ -0,0 +1,3 @@
+export interface IMilestone {
+  title: string;
+}

src/interfaces/pull-request.ts

@@ -0,0 +1,6 @@
+export interface IPullRequest {
+  number: number;
+  head: {
+    ref: string;
+  };
+}

src/interfaces/user.ts

@@ -0,0 +1,4 @@
+export interface IUser {
+  type: string;
+  login: string;
+}

src/main.ts

@@ -1,11 +1,13 @@
 import * as core from '@actions/core';
-import {IssueProcessor, IssueProcessorOptions} from './IssueProcessor';
+import {isValidDate} from './functions/dates/is-valid-date';
+import {IssuesProcessor} from './classes/issues-processor';
+import {IIssuesProcessorOptions} from './interfaces/issues-processor-options';
 
-async function run(): Promise<void> {
+async function _run(): Promise<void> {
   try {
-    const args = getAndValidateArgs();
+    const args = _getAndValidateArgs();
 
-    const processor: IssueProcessor = new IssueProcessor(args);
+    const processor: IssuesProcessor = new IssuesProcessor(args);
     await processor.processIssues();
   } catch (error) {
     core.error(error);
@@ -13,9 +15,9 @@ async function run(): Promise<void> {
   }
 }
 
-function getAndValidateArgs(): IssueProcessorOptions {
-  const args = {
-    repoToken: core.getInput('repo-token', {required: true}),
+function _getAndValidateArgs(): IIssuesProcessorOptions {
+  const args: IIssuesProcessorOptions = {
+    repoToken: core.getInput('repo-token'),
     staleIssueMessage: core.getInput('stale-issue-message'),
     stalePrMessage: core.getInput('stale-pr-message'),
     closeIssueMessage: core.getInput('close-issue-message'),
@@ -23,9 +25,13 @@ function getAndValidateArgs(): IssueProcessorOptions {
     daysBeforeStale: parseInt(
       core.getInput('days-before-stale', {required: true})
     ),
+    daysBeforeIssueStale: parseInt(core.getInput('days-before-issue-stale')),
+    daysBeforePrStale: parseInt(core.getInput('days-before-pr-stale')),
     daysBeforeClose: parseInt(
       core.getInput('days-before-close', {required: true})
     ),
+    daysBeforeIssueClose: parseInt(core.getInput('days-before-issue-close')),
+    daysBeforePrClose: parseInt(core.getInput('days-before-pr-close')),
     staleIssueLabel: core.getInput('stale-issue-label', {required: true}),
     closeIssueLabel: core.getInput('close-issue-label'),
     exemptIssueLabels: core.getInput('exempt-issue-labels'),
@@ -42,7 +48,18 @@ function getAndValidateArgs(): IssueProcessorOptions {
     debugOnly: core.getInput('debug-only') === 'true',
     ascending: core.getInput('ascending') === 'true',
     skipStalePrMessage: core.getInput('skip-stale-pr-message') === 'true',
-    skipStaleIssueMessage: core.getInput('skip-stale-issue-message') === 'true'
+    skipStaleIssueMessage: core.getInput('skip-stale-issue-message') === 'true',
+    deleteBranch: core.getInput('delete-branch') === 'true',
+    startDate:
+      core.getInput('start-date') !== ''
+        ? core.getInput('start-date')
+        : undefined,
+    exemptMilestones: core.getInput('exempt-milestones'),
+    exemptIssueMilestones: core.getInput('exempt-issue-milestones'),
+    exemptPrMilestones: core.getInput('exempt-pr-milestones'),
+    exemptAllMilestones: core.getInput('exempt-all-milestones') === 'true',
+    exemptAllIssueMilestones: _toOptionalBoolean('exempt-all-issue-milestones'),
+    exemptAllPrMilestones: _toOptionalBoolean('exempt-all-pr-milestones')
   };
 
   for (const numberInput of [
@@ -55,7 +72,32 @@ function getAndValidateArgs(): IssueProcessorOptions {
     }
   }
 
+  for (const optionalDateInput of ['start-date']) {
+    // Ignore empty dates because it is considered as the right type for a default value (so a valid one)
+    if (core.getInput(optionalDateInput) !== '') {
+      if (!isValidDate(new Date(core.getInput(optionalDateInput)))) {
+        throw new Error(
+          `input ${optionalDateInput} did not parse to a valid date`
+        );
+      }
+    }
+  }
+
   return args;
 }
 
-run();
+function _toOptionalBoolean(
+  argumentName: Readonly<string>
+): boolean | undefined {
+  const argument: string = core.getInput(argumentName);
+
+  if (argument === 'true') {
+    return true;
+  } else if (argument === 'false') {
+    return false;
+  }
+
+  return undefined;
+}
+
+_run();

src/types/clean-label.ts

@@ -0,0 +1 @@
+export type CleanLabel = string;

src/types/humanized-date.ts

@@ -0,0 +1 @@
+export type HumanizedDate = string;

src/types/iso-date-string.ts

@@ -0,0 +1 @@
+export type IsoDateString = string;

src/types/iso-or-rfc-date-string.ts

@@ -0,0 +1 @@
+export type IsoOrRfcDateString = string;

tsconfig.app.json

@@ -0,0 +1,5 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "**/*.spec.ts"],
+  "include": ["src"]
+}

tsconfig.json

@@ -1,13 +1,12 @@
 {
   "compilerOptions": {
-    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "outDir": "./lib",                        /* Redirect output structure to the directory. */
-    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
-    "strict": true,                           /* Enable all strict type-checking options. */
-    "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
-    "esModuleInterop": true,                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
+    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
+    "outDir": "./lib" /* Redirect output structure to the directory. */,
+    "strict": true /* Enable all strict type-checking options. */,
+    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
+    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
     //"sourceMap": true
   },
-  "exclude": ["node_modules", "**/*.test.ts"]
-}
+  "include": ["src", "__tests__"]
+}

tsconfig.spec.json

@@ -0,0 +1,5 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src", "__tests__"],
+  "exclude": ["node_modules"]
+}