feat: ignore mistakenly closed PRs and recreated closed (#951)

lib/workers/branch/check-existing.js

+const moment = require('moment');
+
 module.exports = {
   prAlreadyExisted,
 };
@@ -14,6 +16,29 @@ async function prAlreadyExisted(config) {
   // Check for current PR title format
   if (await config.api.checkForClosedPr(config.branchName, config.prTitle)) {
     logger.debug('Found closed PR with current title');
+    // this code exists to ignore mistakenly closed PRs which occurred due to a bug
+    // TODO: Remove this by end of October 2017 or in v10
+    const pr = await config.api.findPr(
+      config.branchName,
+      config.prTitle,
+      'closed'
+    );
+    if (pr) {
+      const closedAt = moment(pr.closed_at);
+      const problemStart = moment('2017-10-15T20:00:00Z');
+      const problemStopped = moment('2017-10-16T06:00:00Z');
+      logger.info({ closedAt, problemStart, problemStopped }, 'times');
+      if (
+        problemStart.isBefore(closedAt) &&
+        closedAt.isBefore(problemStopped)
+      ) {
+        logger.info(
+          { closedAt, problemStart, problemStopped },
+          'Ignoring mistakenly closed PR'
+        );
+        return false;
+      }
+    }
     return true;
   }
   // Check for legacy PR title format

test/workers/branch/check-existing.spec.js

@@ -10,7 +10,7 @@ describe('workers/branch/check-existing', () => {
     beforeEach(() => {
       config = {
         ...defaultConfig,
-        api: { checkForClosedPr: jest.fn() },
+        api: { checkForClosedPr: jest.fn(), findPr: jest.fn() },
         logger,
         branchName: 'some-branch',
         prTitle: 'some-title',
@@ -37,5 +37,12 @@ describe('workers/branch/check-existing', () => {
       expect(await prAlreadyExisted(config)).toBe(true);
       expect(config.api.checkForClosedPr.mock.calls.length).toBe(2);
     });
+    it('returns false if mistaken', async () => {
+      config.api.checkForClosedPr.mockReturnValueOnce(true);
+      config.api.findPr.mockReturnValueOnce({
+        closed_at: '2017-10-15T21:28:07.000Z',
+      });
+      expect(await prAlreadyExisted(config)).toBe(false);
+    });
   });
 });