Fix stale closing logic by removing close date addition

This is to ensure we do not close issues before days-before-close has
expired. Without this fix we can encounter a situation where an issue
gets marked as stale and it gets closed immediately without waiting
days-before-close number of days.

__tests__/main.test.ts

@@ -62,11 +62,36 @@ test('empty issue list results in 1 operation', async () => {
   expect(operationsLeft).toEqual(99);
 });
 
-test('processing an issue with no label will make it stale and close it, if it is old enough', async () => {
+test('processing an issue with no label will make it stale and close it, if it is old enough only if days-before-close is set to 0', async () => {
   const TestIssueList: Issue[] = [
     generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z')
   ];
 
+  const opts = {...DefaultProcessorOptions};
+  opts.daysBeforeClose = 0;
+
+  const processor = new IssueProcessor(
+    opts,
+    async p => (p == 1 ? TestIssueList : []),
+    async (num, dt) => [],
+    async (issue, label) => new Date().toDateString()
+  );
+
+  // process our fake issue list
+  await processor.processIssues(1);
+
+  expect(processor.staleIssues.length).toEqual(1);
+  expect(processor.closedIssues.length).toEqual(1);
+});
+
+test('processing an issue with no label will make it stale and not close it if days-before-close is set to > 0', async () => {
+  const TestIssueList: Issue[] = [
+    generateIssue(1, 'An issue with no label', '2020-01-01T17:00:00Z')
+  ];
+
+  const opts = {...DefaultProcessorOptions};
+  opts.daysBeforeClose = 15;
+
   const processor = new IssueProcessor(
     DefaultProcessorOptions,
     async p => (p == 1 ? TestIssueList : []),
@@ -78,7 +103,7 @@ test('processing an issue with no label will make it stale and close it, if it i
   await processor.processIssues(1);
 
   expect(processor.staleIssues.length).toEqual(1);
-  expect(processor.closedIssues.length).toEqual(1);
+  expect(processor.closedIssues.length).toEqual(0);
 });
 
 test('processing an issue with no label will make it stale but not close it', async () => {

src/IssueProcessor.ts

@@ -203,7 +203,7 @@ export class IssueProcessor {
 
     const issueHasUpdate: boolean = IssueProcessor.updatedSince(
       issue.updated_at,
-      this.options.daysBeforeClose + (this.options.daysBeforeStale ?? 0)
+      this.options.daysBeforeClose
     );
     core.info(`Issue #${issue.number} has been updated: ${issueHasUpdate}`);
 
@@ -304,6 +304,11 @@ export class IssueProcessor {
 
     this.operationsLeft -= 2;
 
+    // if the issue is being marked stale, the updated date should be changed to right now
+    // so that close calculations work correctly
+    const newUpdatedAtDate: Date = new Date();
+    issue.updated_at = newUpdatedAtDate.toString();
+
     if (this.options.debugOnly) {
       return;
     }
@@ -410,7 +415,7 @@ export class IssueProcessor {
     const millisSinceLastUpdated =
       new Date().getTime() - new Date(timestamp).getTime();
 
-    return millisSinceLastUpdated < daysInMillis;
+    return millisSinceLastUpdated <= daysInMillis;
   }
 
   private static parseCommaSeparatedString(s: string): string[] {