Bump @typescript-eslint/eslint-plugin from 4.13.0 to 4.14.0 (#281 )

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 4.13.0 to 4.14.0. - [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases) - [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/CHANGELOG.md) - [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v4.14.0/packages/eslint-plugin) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Bump @types/jest from 26.0.15 to 26.0.20 (#280 )
2025-12-25 09:58:16 +00:00 · 2021-01-19 06:02:30 -05:00 · 2021-01-19 06:00:08 -05:00 · 2021-01-19 05:59:51 -05:00 · 2021-01-19 05:54:16 -05:00 · 2021-01-18 08:19:26 -05:00
47 changed files with 4497 additions and 1126 deletions
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,52 +1,57 @@
 {
-    "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"
+  },
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest/globals": true
+  }
+}
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -8,8 +8,9 @@ jobs:
  stale:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/stale@v3
+      - 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'
--- a/.licensed.yml
+++ b/.licensed.yml
@@ -11,4 +11,4 @@ allowed:
  - unlicense

 reviewed:
-  npm:
+  npm:
--- a/.prettierignore
+++ b/.prettierignore
@@ -0,0 +1,7 @@
+.idea
+.licenses
+.vscode
+dist
+lib
+node_modules
+package-lock.json
--- a/.prettierrc.json
+++ b/.prettierrc.json
@@ -1,11 +1,10 @@
 {
-    "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"
+}
--- a/README.md
+++ b/README.md
@@ -24,28 +24,36 @@ $ npm test

 ### Arguments

-|            Input            |                                    Description                                    |  Usage   |
-| :-------------------------: | :-------------------------------------------------------------------------------: | :------: |
-|        `repo-token`         |              PAT(Personal Access Token) for authorizing repository.               | Optional |
-|     `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 |
+| `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 |

 ### Usage

@@ -54,7 +62,7 @@ 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 * * *'
@@ -72,7 +80,7 @@ jobs:
 Configure stale timeouts:

 ```yaml
-name: 'Close stale issues'
+name: 'Close stale issues and PRs'
 on:
  schedule:
    - cron: '30 1 * * *'
@@ -83,15 +91,63 @@ jobs:
    steps:
      - 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'
+          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 different stale timeouts but never close a pr:
+
+```yaml
+name: 'Close stale issues and PR'
+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.'
+          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'
+name: 'Close stale issues and PRs'
 on:
  schedule:
    - cron: '30 1 * * *'
@@ -111,6 +167,41 @@ jobs:
          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'
+```
+
 ### 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.
--- a/tests/main.test.ts
+++ b/tests/main.test.ts
--- a/action.yml
+++ b/action.yml
@@ -4,61 +4,110 @@ author: 'GitHub'
 inputs:
  repo-token:
    description: 'Token for the repository. Can be passed in using `{{ secrets.GITHUB_TOKEN }}`.'
+    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.'
+    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.'
+    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 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 that mean a pull request is exempt from being marked stale. Separate multiple labels with commas (eg. "label1,label2")'
    default: ''
+    required: false
+  exempt-milestones:
+    description: 'The milestones that mean an issue or a pr is exempt from being marked 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 stale. Separate multiple milestones with commas (eg. "milestone1,milestone2"). Override "exempt-milestones" option regarding only the issue.'
+    default: ''
+    required: false
+  exempt-pr-milestones:
+    description: 'The milestones that mean a pull request is exempt from being marked stale. Separate multiple milestones with commas (eg. "milestone1,milestone2"). Override "exempt-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
+    default: 'false'
+    required: false
+  start-date:
+    description: 'The date used to skip the stale action on issue/pr created before it (ISO 8601 or RFC 2822).'
+    default: ''
+    required: false
 runs:
  using: 'node12'
  main: 'dist/index.js'
--- a/dist/index.js
+++ b/dist/index.js
--- a/package-lock.json
+++ b/package-lock.json
@@ -418,9 +418,9 @@
      }
    },
    "@eslint/eslintrc": {
-      "version": "0.2.2",
-      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.2.2.tgz",
-      "integrity": "sha512-EfB5OHNYp1F4px/LI/FEnGylop7nOqkQ1LRzCM0KccA2U8tvV8w01KBv37LbO7nW4H+YhKyo2LcJhRwjjV17QQ==",
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.3.0.tgz",
+      "integrity": "sha512-1JTKgrOKAHVivSvOYw+sJOunkBjUOvjqWk1DPja7ZFhIS2mX/4EgTT8M7eTK9jrKhL/FvXXEbQwIs3pg1xp3dg==",
      "dev": true,
      "requires": {
        "ajv": "^6.12.4",
@@ -430,7 +430,7 @@
        "ignore": "^4.0.6",
        "import-fresh": "^3.2.1",
        "js-yaml": "^3.13.1",
-        "lodash": "^4.17.19",
+        "lodash": "^4.17.20",
        "minimatch": "^3.0.4",
        "strip-json-comments": "^3.1.1"
      },
@@ -447,6 +447,15 @@
            "uri-js": "^4.2.2"
          }
        },
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-        "astral-regex": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-2.0.0.tgz",
-          "integrity": "sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==",
-          "dev": true
-        },
        "color-convert": {
          "version": "2.0.1",
          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -8844,12 +8845,6 @@
          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
          "dev": true
-        },
-        "is-fullwidth-code-point": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-          "dev": true
        }
      }
    },
@@ -9864,6 +9859,11 @@
      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
      "dev": true
    },
+    "yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    },
    "yargs": {
      "version": "15.4.1",
      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
--- a/package.json
+++ b/package.json
@@ -6,10 +6,12 @@
  "main": "lib/main.js",
  "scripts": {
    "build": "tsc",
-    "format": "prettier --write **/*.ts",
-    "format-check": "prettier --check **/*.ts",
+    "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"
@@ -28,23 +30,24 @@
  "dependencies": {
    "@actions/core": "^1.2.6",
    "@actions/github": "^4.0.0",
-    "@octokit/rest": "^18.0.9",
+    "@octokit/rest": "^18.0.12",
    "lodash.deburr": "^4.1.0",
-    "semver": "^7.3.2"
+    "semver": "^7.3.4"
  },
  "devDependencies": {
-    "@types/jest": "^26.0.15",
+    "@types/jest": "^26.0.20",
    "@types/lodash.deburr": "^4.1.6",
-    "@types/node": "^14.10.0",
+    "@types/node": "^14.14.21",
    "@types/semver": "^7.3.4",
-    "@typescript-eslint/parser": "^4.8.1",
+    "@typescript-eslint/eslint-plugin": "^4.14.0",
+    "@typescript-eslint/parser": "^4.14.0",
    "@vercel/ncc": "^0.27.0",
-    "eslint": "^7.17.0",
+    "eslint": "^7.18.0",
    "eslint-plugin-github": "^4.0.1",
    "eslint-plugin-jest": "^24.1.3",
    "jest": "^26.6.3",
    "jest-circus": "^26.6.3",
-    "js-yaml": "^3.14.0",
+    "js-yaml": "^4.0.0",
    "prettier": "^2.2.1",
    "ts-jest": "^26.4.4",
    "typescript": "^4.1.3"
--- a/src/IssueProcessor.ts
+++ b/src/IssueProcessor.ts
@@ -1,19 +1,21 @@
-import * as core from '@actions/core';
 import {context, getOctokit} from '@actions/github';
 import {GitHub} from '@actions/github/lib/utils';
 import {GetResponseTypeFromEndpointMethod} from '@octokit/types';
+import {Issue} from './classes/issue';
+import {IssueLogger} from './classes/loggers/issue-logger';
+import {Logger} from './classes/loggers/logger';
+import {Milestones} from './classes/milestones';
+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 {labelsToList} from './functions/labels-to-list';
-
-export interface Issue {
-  title: string;
-  number: number;
-  updated_at: string;
-  labels: Label[];
-  pull_request: any;
-  state: string;
-  locked: boolean;
-}
+import {isPullRequest} from './functions/is-pull-request';
+import {shouldMarkWhenStale} from './functions/should-mark-when-stale';
+import {IsoOrRfcDateString} from './types/iso-or-rfc-date-string';
+import {wordsToList} from './functions/words-to-list';
+import {IIssue} from './interfaces/issue';

 export interface PullRequest {
  number: number;
@@ -48,7 +50,11 @@ export interface IssueProcessorOptions {
  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;
@@ -63,16 +69,28 @@ export interface IssueProcessorOptions {
  skipStaleIssueMessage: boolean;
  skipStalePrMessage: boolean;
  deleteBranch: boolean;
+  startDate: IsoOrRfcDateString | undefined; // Should be ISO 8601 or RFC 2822
+  exemptMilestones: string;
+  exemptIssueMilestones: string;
+  exemptPrMilestones: string;
 }

 /***
 * Handle processing of issues for staleness/closure.
 */
 export class IssueProcessor {
+  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: IssueProcessorOptions;
-  private operationsLeft = 0;
-
  readonly staleIssues: Issue[] = [];
  readonly closedIssues: Issue[] = [];
  readonly deletedBranchIssues: Issue[] = [];
@@ -92,27 +110,27 @@ export class IssueProcessor {
    ) => Promise<string | undefined>
  ) {
    this.options = options;
-    this.operationsLeft = options.operationsPerRun;
+    this._operationsLeft = options.operationsPerRun;
    this.client = getOctokit(options.repoToken);

    if (getActor) {
-      this.getActor = getActor;
+      this._getActor = getActor;
    }

    if (getIssues) {
-      this.getIssues = getIssues;
+      this._getIssues = getIssues;
    }

    if (listIssueComments) {
-      this.listIssueComments = listIssueComments;
+      this._listIssueComments = listIssueComments;
    }

    if (getLabelCreationDate) {
-      this.getLabelCreationDate = getLabelCreationDate;
+      this._getLabelCreationDate = getLabelCreationDate;
    }

    if (this.options.debugOnly) {
-      core.warning(
+      this._logger.warning(
        'Executing in debug mode. Debug output will be written but no issues will be processed.'
      );
    }
@@ -120,97 +138,157 @@ export class IssueProcessor {

  async processIssues(page = 1): Promise<number> {
    // get the next batch of issues
-    const issues: Issue[] = await this.getIssues(page);
-    this.operationsLeft -= 1;
+    const issues: Issue[] = await this._getIssues(page);
+    this._operationsLeft -= 1;

-    const actor: string = await this.getActor();
+    const actor: string = await this._getActor();

    if (issues.length <= 0) {
-      core.info('No more issues found to process. Exiting.');
-      return this.operationsLeft;
+      this._logger.info('---');
+      this._logger.info('No more issues found to process. Exiting.');
+      return this._operationsLeft;
    }

    for (const issue of issues.values()) {
-      const isPr = !!issue.pull_request;
+      const issueLogger: IssueLogger = new IssueLogger(issue);

-      core.info(
-        `Found issue: issue #${issue.number} last updated ${issue.updated_at} (is pr? ${isPr})`
+      issueLogger.info(
+        `Found issue: issue #${issue.number} last updated ${issue.updated_at} (is pr? ${issue.isPullRequest})`
      );

      // calculate string based messages for this issue
-      const staleMessage: string = isPr
+      const staleMessage: string = issue.isPullRequest
        ? this.options.stalePrMessage
        : this.options.staleIssueMessage;
-      const closeMessage: string = isPr
+      const closeMessage: string = issue.isPullRequest
        ? this.options.closePrMessage
        : this.options.closeIssueMessage;
-      const staleLabel: string = isPr
+      const staleLabel: string = issue.isPullRequest
        ? this.options.stalePrLabel
        : this.options.staleIssueLabel;
-      const closeLabel: string = isPr
+      const closeLabel: string = issue.isPullRequest
        ? this.options.closePrLabel
        : this.options.closeIssueLabel;
-      const exemptLabels: string[] = labelsToList(
-        isPr ? this.options.exemptPrLabels : this.options.exemptIssueLabels
-      );
-      const skipMessage = isPr
+      const skipMessage = issue.isPullRequest
        ? this.options.skipStalePrMessage
        : this.options.skipStaleIssueMessage;
-      const issueType: string = isPr ? 'pr' : 'issue';
-      const shouldMarkWhenStale = this.options.daysBeforeStale > -1;
+      const issueType: IssueType = getIssueType(issue.isPullRequest);
+      const daysBeforeStale: number = issue.isPullRequest
+        ? this._getDaysBeforePrStale()
+        : this._getDaysBeforeIssueStale();

-      if (!staleMessage && shouldMarkWhenStale) {
-        core.info(`Skipping ${issueType} due to empty stale message`);
+      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') {
-        core.info(`Skipping ${issueType} because it is closed`);
+        issueLogger.info(`Skipping ${issueType} because it is closed`);
        continue; // don't process closed issues
      }

      if (issue.locked) {
-        core.info(`Skipping ${issueType} because it is 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: string) =>
+        exemptLabels.some((exemptLabel: Readonly<string>): boolean =>
          isLabeled(issue, exemptLabel)
        )
      ) {
-        core.info(`Skipping ${issueType} because it has an exempt label`);
+        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
      }

-      // does this issue have a stale label?
-      let isStale: boolean = isLabeled(issue, staleLabel);
+      const milestones: Milestones = new Milestones(this.options, issue);

-      if (isStale) {
-        core.info(`This issue has a stale label`);
-      } else {
-        core.info(`This issue hasn't a stale label`);
+      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 = !IssueProcessor.updatedSince(
+      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(
+      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);
-        isStale = true; // this issue is now considered stale
+        await this._markStale(issue, staleMessage, staleLabel, skipMessage);
+        issue.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(
+      if (issue.isStale) {
+        issueLogger.info(`Found a stale ${issueType}`);
+        await this._processStaleIssue(
          issue,
          issueType,
          staleLabel,
@@ -221,8 +299,10 @@ export class IssueProcessor {
      }
    }

-    if (this.operationsLeft <= 0) {
-      core.warning('Reached max number of operations to process. Exiting.');
+    if (this._operationsLeft <= 0) {
+      this._logger.warning(
+        'Reached max number of operations to process. Exiting.'
+      );
      return 0;
    }

@@ -231,73 +311,88 @@ export class IssueProcessor {
  }

  // handle all of the stale issue logic when we find a stale issue
-  private async processStaleIssue(
+  private async _processStaleIssue(
    issue: Issue,
-    issueType: string,
+    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;
-    core.info(`Issue #${issue.number} marked stale on: ${markedStaleOn}`);
+      (await this._getLabelCreationDate(issue, staleLabel)) || issue.updated_at;
+    issueLogger.info(
+      `Issue #${issue.number} marked stale on: ${markedStaleOn}`
+    );

-    const issueHasComments: boolean = await this.hasCommentsSince(
+    const issueHasComments: boolean = await this._hasCommentsSince(
      issue,
      markedStaleOn,
      actor
    );
-    core.info(
+    issueLogger.info(
      `Issue #${issue.number} has been commented on: ${issueHasComments}`
    );

-    const issueHasUpdate: boolean = IssueProcessor.updatedSince(
+    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: ${daysBeforeClose}`);
+    }
+
+    const issueHasUpdate: boolean = IssueProcessor._updatedSince(
      issue.updated_at,
-      this.options.daysBeforeClose
+      daysBeforeClose
+    );
+    issueLogger.info(
+      `Issue #${issue.number} has been updated: ${issueHasUpdate}`
    );
-    core.info(`Issue #${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);
+      await this._removeStaleLabel(issue, staleLabel);
    }

    // now start closing logic
-    if (this.options.daysBeforeClose < 0) {
+    if (daysBeforeClose < 0) {
      return; // nothing to do because we aren't closing stale issues
    }

    if (!issueHasComments && !issueHasUpdate) {
-      core.info(
+      issueLogger.info(
        `Closing ${issueType} because it was last updated on ${issue.updated_at}`
      );
-      await this.closeIssue(issue, closeMessage, closeLabel);
+      await this._closeIssue(issue, closeMessage, closeLabel);

      if (this.options.deleteBranch && issue.pull_request) {
-        core.info(
+        issueLogger.info(
          `Deleting branch for #${issue.number} as delete-branch option was specified`
        );
-        await this.deleteBranch(issue);
+        await this._deleteBranch(issue);
        this.deletedBranchIssues.push(issue);
      }
    } else {
-      core.info(
+      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(
+  private async _hasCommentsSince(
    issue: Issue,
    sinceDate: string,
    actor: string
  ): Promise<boolean> {
-    core.info(
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(
      `Checking for comments on issue #${issue.number} since ${sinceDate}`
    );

@@ -306,13 +401,13 @@ export class IssueProcessor {
    }

    // find any comments since the date
-    const comments = await this.listIssueComments(issue.number, sinceDate);
+    const comments = await this._listIssueComments(issue.number, sinceDate);

    const filteredComments = comments.filter(
      comment => comment.user.type === 'User' && comment.user.login !== actor
    );

-    core.info(
+    issueLogger.info(
      `Comments not made by actor or another bot: ${filteredComments.length}`
    );

@@ -321,7 +416,7 @@ export class IssueProcessor {
  }

  // grab comments for an issue since a given date
-  private async listIssueComments(
+  private async _listIssueComments(
    issueNumber: number,
    sinceDate: string
  ): Promise<Comment[]> {
@@ -335,13 +430,13 @@ export class IssueProcessor {
      });
      return comments.data;
    } catch (error) {
-      core.error(`List issue comments error: ${error.message}`);
+      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> {
+  private async _getActor(): Promise<string> {
    let actor;
    try {
      actor = await this.client.users.getAuthenticated();
@@ -352,8 +447,8 @@ export class IssueProcessor {
    return actor.data.login;
  }

-  // grab issues from github in baches of 100
-  private async getIssues(page: number): Promise<Issue[]> {
+  // 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>;
@@ -370,25 +465,30 @@ export class IssueProcessor {
          page
        }
      );
-      return issueResult.data;
+
+      return issueResult.data.map(
+        (issue: Readonly<IIssue>): Issue => new Issue(this.options, issue)
+      );
    } catch (error) {
-      core.error(`Get issues for repo error: ${error.message}`);
+      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(
+  private async _markStale(
    issue: Issue,
    staleMessage: string,
    staleLabel: string,
    skipMessage: boolean
  ): Promise<void> {
-    core.info(`Marking issue #${issue.number} as stale`);
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(`Marking issue #${issue.number} as stale`);

    this.staleIssues.push(issue);

-    this.operationsLeft -= 2;
+    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
@@ -408,7 +508,7 @@ export class IssueProcessor {
          body: staleMessage
        });
      } catch (error) {
-        core.error(`Error creating a comment: ${error.message}`);
+        issueLogger.error(`Error creating a comment: ${error.message}`);
      }
    }

@@ -420,21 +520,23 @@ export class IssueProcessor {
        labels: [staleLabel]
      });
    } catch (error) {
-      core.error(`Error adding a label: ${error.message}`);
+      issueLogger.error(`Error adding a label: ${error.message}`);
    }
  }

  // Close an issue based on staleness
-  private async closeIssue(
+  private async _closeIssue(
    issue: Issue,
    closeMessage?: string,
    closeLabel?: string
  ): Promise<void> {
-    core.info(`Closing issue #${issue.number} for being stale`);
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(`Closing issue #${issue.number} for being stale`);

    this.closedIssues.push(issue);

-    this.operationsLeft -= 1;
+    this._operationsLeft -= 1;

    if (this.options.debugOnly) {
      return;
@@ -449,7 +551,7 @@ export class IssueProcessor {
          body: closeMessage
        });
      } catch (error) {
-        core.error(`Error creating a comment: ${error.message}`);
+        issueLogger.error(`Error creating a comment: ${error.message}`);
      }
    }

@@ -462,7 +564,7 @@ export class IssueProcessor {
          labels: [closeLabel]
        });
      } catch (error) {
-        core.error(`Error adding a label: ${error.message}`);
+        issueLogger.error(`Error adding a label: ${error.message}`);
      }
    }

@@ -474,31 +576,36 @@ export class IssueProcessor {
        state: 'closed'
      });
    } catch (error) {
-      core.error(`Error updating an issue: ${error.message}`);
+      issueLogger.error(`Error updating an issue: ${error.message}`);
    }
  }

-  private async getPullRequest(
-    pullNumber: number
+  private async _getPullRequest(
+    issue: Issue
  ): Promise<PullRequest | undefined> {
-    this.operationsLeft -= 1;
+    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: pullNumber
+        pull_number: issue.number
      });

      return pullRequest.data;
    } catch (error) {
-      core.error(`Error getting pull request ${pullNumber}: ${error.message}`);
+      issueLogger.error(
+        `Error getting pull request ${issue.number}: ${error.message}`
+      );
    }
  }

  // Delete the branch on closed pull request
-  private async deleteBranch(issue: Issue): Promise<void> {
-    core.info(
+  private async _deleteBranch(issue: Issue): Promise<void> {
+    const issueLogger: IssueLogger = new IssueLogger(issue);
+
+    issueLogger.info(
      `Delete branch from closed issue #${issue.number} - ${issue.title}`
    );

@@ -506,19 +613,21 @@ export class IssueProcessor {
      return;
    }

-    const pullRequest = await this.getPullRequest(issue.number);
+    const pullRequest = await this._getPullRequest(issue);

    if (!pullRequest) {
-      core.info(
+      issueLogger.info(
        `Not deleting branch as pull request not found for issue ${issue.number}`
      );
      return;
    }

    const branch = pullRequest.head.ref;
-    core.info(`Deleting branch ${branch} from closed issue #${issue.number}`);
+    issueLogger.info(
+      `Deleting branch ${branch} from closed issue #${issue.number}`
+    );

-    this.operationsLeft -= 1;
+    this._operationsLeft -= 1;

    try {
      await this.client.git.deleteRef({
@@ -527,19 +636,21 @@ export class IssueProcessor {
        ref: `heads/${branch}`
      });
    } catch (error) {
-      core.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> {
-    core.info(`Removing label "${label}" from issue #${issue.number}`);
+  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;
+    this._operationsLeft -= 1;

    // @todo remove the debug only to be able to test the code below
    if (this.options.debugOnly) {
@@ -554,19 +665,21 @@ export class IssueProcessor {
        name: label
      });
    } catch (error) {
-      core.error(`Error removing a label: ${error.message}`);
+      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(
+  private async _getLabelCreationDate(
    issue: Issue,
    label: string
  ): Promise<string | undefined> {
-    core.info(`Checking for label on issue #${issue.number}`);
+    const issueLogger: IssueLogger = new IssueLogger(issue);

-    this.operationsLeft -= 1;
+    issueLogger.info(`Checking for label on issue #${issue.number}`);
+
+    this._operationsLeft -= 1;

    const options = this.client.issues.listEvents.endpoint.merge({
      owner: context.repo.owner,
@@ -590,11 +703,40 @@ export class IssueProcessor {
    return staleLabeledEvent.created_at;
  }

-  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();
+  private _getDaysBeforeIssueStale(): number {
+    return isNaN(this.options.daysBeforeIssueStale)
+      ? this.options.daysBeforeStale
+      : this.options.daysBeforeIssueStale;
+  }

-    return millisSinceLastUpdated <= daysInMillis;
+  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);
  }
 }
--- a/src/classes/issue.spec.ts
+++ b/src/classes/issue.spec.ts
@@ -0,0 +1,208 @@
+import {IIssue} from '../interfaces/issue';
+import {IMilestone} from '../interfaces/milestone';
+import {IssueProcessorOptions, Label} from '../IssueProcessor';
+import {Issue} from './issue';
+
+describe('Issue', (): void => {
+  let issue: Issue;
+  let optionsInterface: IssueProcessorOptions;
+  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'
+    };
+    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 Label
+      ]);
+    });
+
+    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 Label
+        ];
+        issue = new Issue(optionsInterface, issueInterface);
+      });
+
+      it('should set the isStale to true', (): void => {
+        expect.assertions(1);
+
+        expect(issue.isStale).toStrictEqual(true);
+      });
+    });
+  });
+});
--- a/src/classes/issue.ts
+++ b/src/classes/issue.ts
@@ -0,0 +1,48 @@
+import {isLabeled} from '../functions/is-labeled';
+import {isPullRequest} from '../functions/is-pull-request';
+import {IIssue} from '../interfaces/issue';
+import {IMilestone} from '../interfaces/milestone';
+import {IssueProcessorOptions, Label} from '../IssueProcessor';
+import {IsoDateString} from '../types/iso-date-string';
+
+export class Issue implements IIssue {
+  private readonly _options: IssueProcessorOptions;
+  readonly title: string;
+  readonly number: number;
+  created_at: IsoDateString;
+  updated_at: IsoDateString;
+  readonly labels: Label[];
+  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<IssueProcessorOptions>,
+    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;
+  }
+}
--- a/src/classes/loggers/issue-logger.spec.ts
+++ b/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');
+    });
+  });
+});
--- a/src/classes/loggers/issue-logger.ts
+++ b/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;
+  }
+}
--- a/src/classes/loggers/logger.spec.ts
+++ b/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');
+    });
+  });
+});
--- a/src/classes/loggers/logger.ts
+++ b/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);
+  }
+}
--- a/src/classes/milestones.spec.ts
+++ b/src/classes/milestones.spec.ts
@@ -0,0 +1,596 @@
+import {IIssue} from '../interfaces/issue';
+import {IssueProcessorOptions} from '../IssueProcessor';
+import {Issue} from './issue';
+import {Milestones} from './milestones';
+
+describe('Milestones', (): void => {
+  let milestones: Milestones;
+  let optionsInterface: IssueProcessorOptions;
+  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: ''
+    };
+    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);
+            });
+          });
+        });
+      });
+    });
+  });
+});
--- a/src/classes/milestones.ts
+++ b/src/classes/milestones.ts
@@ -0,0 +1,59 @@
+import deburr from 'lodash.deburr';
+import {wordsToList} from '../functions/words-to-list';
+import {IssueProcessorOptions} from '../IssueProcessor';
+import {Issue} from './issue';
+
+type CleanMilestone = string;
+
+export class Milestones {
+  private static _cleanMilestone(label: Readonly<string>): CleanMilestone {
+    return deburr(label.toLowerCase());
+  }
+
+  private readonly _options: IssueProcessorOptions;
+  private readonly _issue: Issue;
+
+  constructor(options: Readonly<IssueProcessorOptions>, issue: Issue) {
+    this._options = options;
+    this._issue = issue;
+  }
+
+  shouldExemptMilestones(): boolean {
+    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)
+    );
+  }
+}
--- a/src/enums/issue-type.ts
+++ b/src/enums/issue-type.ts
@@ -0,0 +1,4 @@
+export enum IssueType {
+  Issue = 'issue',
+  PullRequest = 'pr'
+}
--- a/src/functions/dates/get-humanized-date.spec.ts
+++ b/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');
+    });
+  });
+});
--- a/src/functions/dates/get-humanized-date.ts
+++ b/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('-');
+}
--- a/src/functions/dates/is-date-more-recent-than.spec.ts
+++ b/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);
+    });
+  });
+});
--- a/src/functions/dates/is-date-more-recent-than.ts
+++ b/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;
+}
--- a/src/functions/dates/is-valid-date.spec.ts
+++ b/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);
+    });
+  });
+});
--- a/src/functions/dates/is-valid-date.ts
+++ b/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;
+}
--- a/src/functions/get-issue-type.spec.ts
+++ b/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');
+    });
+  });
+});
--- a/src/functions/get-issue-type.ts
+++ b/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;
+}
--- a/src/functions/is-labeled.spec.ts
+++ b/src/functions/is-labeled.spec.ts
@@ -1,4 +1,4 @@
-import {Issue} from '../IssueProcessor';
+import {Issue} from '../classes/issue';
 import {isLabeled} from './is-labeled';

 describe('isLabeled()', (): void => {
--- a/src/functions/is-labeled.ts
+++ b/src/functions/is-labeled.ts
@@ -1,16 +1,16 @@
 import deburr from 'lodash.deburr';
-import {Issue, Label} from '../IssueProcessor';
-
-type CleanLabel = string;
+import {Issue} from '../classes/issue';
+import {Label} from '../IssueProcessor';
+import {CleanLabel} from '../types/clean-label';

 /**
 * @description
- * Check if the label is listed as a label of the issue
+ * 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 issue labels
+ * @return {boolean} Return true when the given label is also in the given issue labels
 */
 export function isLabeled(
  issue: Readonly<Issue>,
--- a/src/functions/is-pull-request.spec.ts
+++ b/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);
+      });
+    }
+  );
+});
--- a/src/functions/is-pull-request.ts
+++ b/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;
+}
--- a/src/functions/labels-to-list.spec.ts
+++ b/src/functions/labels-to-list.spec.ts
@@ -1,141 +0,0 @@
-import {labelsToList} from './labels-to-list';
-
-describe('labelsToList()', (): void => {
-  let labels: string;
-
-  describe('when the given labels is empty', (): void => {
-    beforeEach((): void => {
-      labels = '';
-    });
-
-    it('should return an empty list of labels', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual([]);
-    });
-  });
-
-  describe('when the given labels is a simple label', (): void => {
-    beforeEach((): void => {
-      labels = 'label';
-    });
-
-    it('should return a list of one label', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual(['label']);
-    });
-  });
-
-  describe('when the given labels is a label with extra spaces before and after', (): void => {
-    beforeEach((): void => {
-      labels = '   label   ';
-    });
-
-    it('should return a list of one label and remove all spaces before and after', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual(['label']);
-    });
-  });
-
-  describe('when the given labels is a kebab case label', (): void => {
-    beforeEach((): void => {
-      labels = 'kebab-case-label';
-    });
-
-    it('should return a list of one label', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual(['kebab-case-label']);
-    });
-  });
-
-  describe('when the given labels is two kebab case labels separated with a comma', (): void => {
-    beforeEach((): void => {
-      labels = 'kebab-case-label-1,kebab-case-label-2';
-    });
-
-    it('should return a list of two labels', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual([
-        'kebab-case-label-1',
-        'kebab-case-label-2'
-      ]);
-    });
-  });
-
-  describe('when the given labels is a multiple word label', (): void => {
-    beforeEach((): void => {
-      labels = 'label like a sentence';
-    });
-
-    it('should return a list of one label', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual(['label like a sentence']);
-    });
-  });
-
-  describe('when the given labels is two multiple word labels separated with a comma', (): void => {
-    beforeEach((): void => {
-      labels = 'label like a sentence, another label like a sentence';
-    });
-
-    it('should return a list of two labels', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual([
-        'label like a sentence',
-        'another label like a sentence'
-      ]);
-    });
-  });
-
-  describe('when the given labels is a multiple word label with %20 spaces', (): void => {
-    beforeEach((): void => {
-      labels = 'label%20like%20a%20sentence';
-    });
-
-    it('should return a list of one label', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual(['label%20like%20a%20sentence']);
-    });
-  });
-
-  describe('when the given labels is two multiple word labels with %20 spaces separated with a comma', (): void => {
-    beforeEach((): void => {
-      labels =
-        'label%20like%20a%20sentence,another%20label%20like%20a%20sentence';
-    });
-
-    it('should return a list of two labels', (): void => {
-      expect.assertions(1);
-
-      const result = labelsToList(labels);
-
-      expect(result).toStrictEqual([
-        'label%20like%20a%20sentence',
-        'another%20label%20like%20a%20sentence'
-      ]);
-    });
-  });
-});
--- a/src/functions/labels-to-list.ts
+++ b/src/functions/labels-to-list.ts
@@ -1,23 +0,0 @@
-/**
- * @description
- * Transform a string of comma separated labels
- * to an array of labels
- *
- * @example
- * labelsToList('label') => ['label']
- * labelsToList('label,label') => ['label', 'label']
- * labelsToList('kebab-label') => ['kebab-label']
- * labelsToList('kebab%20label') => ['kebab%20label']
- * labelsToList('label with words') => ['label with words']
- *
- * @param {Readonly<string>} labels A string of comma separated labels
- *
- * @return {string[]} A list of labels
- */
-export function labelsToList(labels: Readonly<string>): string[] {
-  if (!labels.length) {
-    return [];
-  }
-
-  return labels.split(',').map(l => l.trim());
-}
--- a/src/functions/should-mark-when-stale.spec.ts
+++ b/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);
+    });
+  });
+});
--- a/src/functions/should-mark-when-stale.ts
+++ b/src/functions/should-mark-when-stale.ts
@@ -0,0 +1,5 @@
+export function shouldMarkWhenStale(
+  daysBeforeStale: Readonly<number>
+): boolean {
+  return daysBeforeStale >= 0;
+}
--- a/src/functions/words-to-list.spec.ts
+++ b/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'
+      ]);
+    });
+  });
+});
--- a/src/functions/words-to-list.ts
+++ b/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());
+}
--- a/src/interfaces/issue.ts
+++ b/src/interfaces/issue.ts
@@ -0,0 +1,15 @@
+import {Label} from '../IssueProcessor';
+import {IsoDateString} from '../types/iso-date-string';
+import {IMilestone} from './milestone';
+
+export interface IIssue {
+  title: string;
+  number: number;
+  created_at: IsoDateString;
+  updated_at: IsoDateString;
+  labels: Label[];
+  pull_request: Object | null | undefined;
+  state: string;
+  locked: boolean;
+  milestone: IMilestone | undefined;
+}
--- a/src/interfaces/milestone.ts
+++ b/src/interfaces/milestone.ts
@@ -0,0 +1,3 @@
+export interface IMilestone {
+  title: string;
+}
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,4 +1,5 @@
 import * as core from '@actions/core';
+import {isValidDate} from './functions/dates/is-valid-date';
 import {IssueProcessor, IssueProcessorOptions} from './IssueProcessor';

 async function run(): Promise<void> {
@@ -14,7 +15,7 @@ async function run(): Promise<void> {
 }

 function getAndValidateArgs(): IssueProcessorOptions {
-  const args = {
+  const args: IssueProcessorOptions = {
    repoToken: core.getInput('repo-token'),
    staleIssueMessage: core.getInput('stale-issue-message'),
    stalePrMessage: core.getInput('stale-pr-message'),
@@ -23,9 +24,13 @@ 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'),
@@ -43,7 +48,14 @@ function getAndValidateArgs(): IssueProcessorOptions {
    ascending: core.getInput('ascending') === 'true',
    skipStalePrMessage: core.getInput('skip-stale-pr-message') === 'true',
    skipStaleIssueMessage: core.getInput('skip-stale-issue-message') === 'true',
-    deleteBranch: core.getInput('delete-branch') === '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')
  };

  for (const numberInput of [
@@ -56,6 +68,17 @@ 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;
 }

--- a/src/types/clean-label.ts
+++ b/src/types/clean-label.ts
@@ -0,0 +1 @@
+export type CleanLabel = string;
--- a/src/types/humanized-date.ts
+++ b/src/types/humanized-date.ts
@@ -0,0 +1 @@
+export type HumanizedDate = string;
--- a/src/types/iso-date-string.ts
+++ b/src/types/iso-date-string.ts
@@ -0,0 +1 @@
+export type IsoDateString = string;
--- a/src/types/iso-or-rfc-date-string.ts
+++ b/src/types/iso-or-rfc-date-string.ts
@@ -0,0 +1 @@
+export type IsoOrRfcDateString = string;
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,13 +1,13 @@
 {
  "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. */,
+    "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'. */
    //"sourceMap": true
  },
  "exclude": ["node_modules", "**/*.test.ts"]
-}
+}
Author	SHA1	Message	Date
dependabot[bot]	86561461b9	Bump @typescript-eslint/eslint-plugin from 4.13.0 to 4.14.0 (#281 ) Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 4.13.0 to 4.14.0. - [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases) - [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/CHANGELOG.md) - [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v4.14.0/packages/eslint-plugin) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-19 06:02:30 -05:00
dependabot[bot]	342b612d3c	Bump @types/jest from 26.0.15 to 26.0.20 (#280 ) Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 26.0.15 to 26.0.20. - [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases) - [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-19 06:00:08 -05:00
dependabot[bot]	d09524cd2c	Bump @typescript-eslint/parser from 4.13.0 to 4.14.0 (#282 ) Bumps [@typescript-eslint/parser](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser) from 4.13.0 to 4.14.0. - [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases) - [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/parser/CHANGELOG.md) - [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v4.14.0/packages/parser) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-19 05:59:51 -05:00
Geoffrey Testelin	f71123a6f7	feat(exempt): add new options to exempt the milestones (#279 ) * feat(exempt): add new options to exempt the milestones closes #270 * test(milestones): add coverage * test(issue): add coverage * chore(rebase): fix all errors due to the rebase also made some changes regarding the change I made with the lint scripts and prettier. I did not saw that some scripts were already here and I created to more to keep the old ones as well * test(milestone): add coverage * chore(index): update index * fix(checks): remove checks over optional number options the code was actually handling the case where the values are NaN so it's fine	2021-01-19 05:54:16 -05:00
Ross Brodbeck	1b9f13b607	Add rebuilt package	2021-01-18 08:19:26 -05:00
dependabot[bot]	f8321eb62b	Bump eslint from 7.17.0 to 7.18.0 (#274 ) Bumps [eslint](https://github.com/eslint/eslint) from 7.17.0 to 7.18.0. - [Release notes](https://github.com/eslint/eslint/releases) - [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md) - [Commits](https://github.com/eslint/eslint/compare/v7.17.0...v7.18.0) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-18 08:17:48 -05:00
dependabot[bot]	6a04021499	Bump @types/node from 14.10.0 to 14.14.21 (#276 ) Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 14.10.0 to 14.14.21. - [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases) - [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-18 08:17:37 -05:00
dependabot[bot]	7e83de7bef	Bump js-yaml from 3.14.0 to 4.0.0 (#275 ) Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.14.0 to 4.0.0. - [Release notes](https://github.com/nodeca/js-yaml/releases) - [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md) - [Commits](https://github.com/nodeca/js-yaml/compare/3.14.0...4.0.0) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-18 08:13:03 -05:00
dependabot[bot]	a9eccc216e	Bump semver from 7.3.2 to 7.3.4 (#277 ) Bumps [semver](https://github.com/npm/node-semver) from 7.3.2 to 7.3.4. - [Release notes](https://github.com/npm/node-semver/releases) - [Changelog](https://github.com/npm/node-semver/blob/master/CHANGELOG.md) - [Commits](https://github.com/npm/node-semver/compare/v7.3.2...v7.3.4) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-18 08:12:50 -05:00
dependabot[bot]	0fa41d1841	Bump @octokit/rest from 18.0.9 to 18.0.12 (#273 ) Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.0.9 to 18.0.12. - [Release notes](https://github.com/octokit/rest.js/releases) - [Commits](https://github.com/octokit/rest.js/compare/v18.0.9...v18.0.12) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2021-01-18 08:12:26 -05:00
Geoffrey Testelin	f698371c0d	Add a start date option to ignore old issues and PRs (#269 ) * docs(readme): add a small precision about the operations-per-run closes #230 * chore(lint): ignore the lib folder for prettier * chore(date): add a function to check if a date is valid * chore(date): add a function to get a humanized date * chore(date): add a function to check if the date is more recent than * feat(date): add a start date to ignore old issues and PRs closes #174 * docs(readme): change the date to match the description * chore(date): add a better type for the date * docs(date): add missing JSDoc about the return type * chore(rebase): fix issues due to rebase * docs(readme): fix table formatting issues	2021-01-17 20:22:36 -05:00
Geoffrey Testelin	7f340a46f3	Remove the stale label when labeled with an exempt one (#268 ) * refactor(issue): create a dedicated function to remove the stale label * refactor: prefix private methods with _ to make it consistent with others methods * feat(label): remove the stale label when labeled with an exempt one closes #136 * chore: fix logger issues due to rebase @hross I think there is a room for improvement regarding the class creation of the issue logger (code duplication) but I do not see how to do it without changing a lot of stuff; do you have an idea? * test: use strict equal and move the new test in a more logical position * docs(readme): fix parsing error of the default values in the table prettier was not liking the previous syntax	2021-01-16 20:13:19 -05:00
Ross Brodbeck	3f95874437	Use main instead of v3 for more coverage	2021-01-16 09:50:58 -05:00
Geoffrey Testelin	e6b77bc964	feat(logs): enhance the logs and add a prefix with the issue number (#222 ) * feat(logs): enhance the logs and add a prefix with the issue number * chore: use camelCase for constants use the new logger for the new code due to the rebase	2021-01-16 09:49:50 -05:00
Geoffrey Testelin	552e4c60f0	feat(stale-and-close): add new options to change the days before close (#224 ) * docs(readme): add new options in the documentation * chore: update the action schema * chore: parse the new arguments * feat(stale-and-close): add new options to change the days before close to avoid a breaking change and simplify the configuration the old options 'daysBeforeStale' and 'daysBeforePrClose' are kept and new options are available to override them with 'daysBeforeIssueStale', 'daysBeforePrStale', 'daysBeforeIssueClose' and 'daysBeforePrClose' * chore: rename the issue type enum to remove the enum suffix * chore: add missing dependency for eslint and typescript also upgrade the parser * chore: fix an issue with the linter for the shadow rules it was not configured properly for TypeScript * chore: use camelCase for constants * chore: use camelCase for enum members * chore: fix the tests * chore: enhance prettier to also lint other kind of files it was configured to only work with ts and it was not working well to be honest also now the lint scripts will also run prettier	2021-01-16 08:28:29 -05:00
Ross Brodbeck	b12dccced8	Update package dependencies (#267 )	2021-01-15 07:52:52 -05:00
Ross Brodbeck	7de5f1946d	Update stale.yml	2021-01-15 07:40:06 -05:00