feat(repeatable): store key in repeat options

REFERENCE.md

@@ -305,6 +305,7 @@ interface RepeatOpts {
   limit?: number; // Number of times the job should repeat at max.
   every?: number; // Repeat every millis (cron setting cannot be used together with this setting.)
   count?: number; // The start value for the repeat iteration count.
+  readonly key: string; // The key for the repeatable job metadata in Redis.
 }
 ```
 
@@ -534,7 +535,17 @@ for the job when it was added.
 removeRepeatableByKey(key: string): Promise<void>
 ```
 
-Removes a given repeatable job by its key.
+Removes a given repeatable job by its key so that no more repeteable jobs will be processed for this 
+particular job.
+There are currently two ways to get the "key" of a repeatable job, either listing alll the existing repeatable jobs, and getting the "key" for the one you want to delete, or by getting it from the added job, like this:
+
+```ts
+  const job = await queue.add('remove', { foo: 'bar' }, { repeat });
+
+  // Store "job.opts.repeat.key" somewhere and later
+
+  await removeRepeatbleByKey(key);
+```
 
 ---
 

lib/repeatable.js

@@ -38,42 +38,41 @@ module.exports = function(Queue) {
     const nextMillis = getNextMillis(now, repeat);
     if (nextMillis) {
       const jobId = repeat.jobId ? repeat.jobId + ':' : ':';
-      const repeatJobKey = getRepeatKey(name, repeat, jobId);
+      const repeatKey = getRepeatKey(name, repeat, jobId);
 
       const createNextJob = () => {
-        return client
-          .zadd(this.keys.repeat, nextMillis, repeatJobKey)
-          .then(() => {
-            //
-            // Generate unique job id for this iteration.
-            //
-            const customId = getRepeatJobId(
-              name,
-              jobId,
-              nextMillis,
-              md5(repeatJobKey)
-            );
-            now = Date.now();
-            const delay = nextMillis - now;
+        return client.zadd(this.keys.repeat, nextMillis, repeatKey).then(() => {
+          //
+          // Generate unique job id for this iteration.
+          //
+          const customId = getRepeatJobId(
+            name,
+            jobId,
+            nextMillis,
+            md5(repeatKey)
+          );
+          now = Date.now();
+          const delay = nextMillis - now;
 
-            return Job.create(
-              this,
-              name,
-              data,
-              _.defaultsDeep(
-                {
-                  repeat: {
-                    count: currentCount
-                  },
-                  jobId: customId,
-                  delay: delay < 0 ? 0 : delay,
-                  timestamp: now,
-                  prevMillis: nextMillis
+          return Job.create(
+            this,
+            name,
+            data,
+            _.defaultsDeep(
+              {
+                repeat: {
+                  count: currentCount,
+                  key: repeatKey
                 },
-                opts
-              )
-            );
-          });
+                jobId: customId,
+                delay: delay < 0 ? 0 : delay,
+                timestamp: now,
+                prevMillis: nextMillis
+              },
+              opts
+            )
+          );
+        });
       };
 
       if (skipCheckExists) {
@@ -83,7 +82,7 @@ module.exports = function(Queue) {
       // Check that the repeatable job hasn't been removed
       // TODO: a lua script would be better here
       return client
-        .zscore(this.keys.repeat, repeatJobKey)
+        .zscore(this.keys.repeat, repeatKey)
         .then(repeatableExists => {
           // The job could have been deleted since this check
           if (repeatableExists) {

test/test_repeat.js

@@ -75,7 +75,8 @@ describe('repeat', () => {
     expect(job1.opts.repeat).to.be.deep.equal({
       count: 1,
       cron: '0 * * * * *',
-      startDate: '2020-09-02T22:29:00Z'
+      startDate: '2020-09-02T22:29:00Z',
+      key: '__default__::::0 * * * * *'
     });
 
     const job2 = await queue.add(
@@ -96,7 +97,8 @@ describe('repeat', () => {
       count: 1,
       cron: '0 * * * * *',
       startDate: '2020-09-02T22:29:00Z',
-      endDate: '2020-09-05T01:44:37Z'
+      endDate: '2020-09-05T01:44:37Z',
+      key: '__default__::1599270277000::0 * * * * *'
     });
   });
 
@@ -474,6 +476,14 @@ describe('repeat', () => {
     expect(delayedJobs).to.have.length(0);
   });
 
+  it('should return repeatable job key', async () => {
+    const repeat = { cron: '*/2 * * * * *' };
+
+    const job = await queue.add('remove', { foo: 'bar' }, { repeat });
+
+    expect(job.opts.repeat.key).to.be.equal('remove::::*/2 * * * * *');
+  });
+
   it('should be able to remove repeatable jobs by key that has a jobId', async () => {
     const repeat = { cron: '*/2 * * * * *' };