fix: added fractional offset support (#685)

README.md

@@ -94,10 +94,10 @@ Parameter Based
         - `onTick` - [REQUIRED] - The function to fire at the specified time. If an `onComplete` callback was provided, `onTick` will receive it as an argument. `onTick` may call `onComplete` when it has finished its work.
         - `onComplete` - [OPTIONAL] - A function that will fire when the job is stopped with `job.stop()`, and may also be called by `onTick` at the end of each run.
         - `start` - [OPTIONAL] - Specifies whether to start the job just before exiting the constructor. By default this is set to false. If left at default you will need to call `job.start()` in order to start the job (assuming `job` is the variable you set the cronjob to). This does not immediately fire your `onTick` function, it just gives you more control over the behavior of your jobs.
-        - `timeZone` - [OPTIONAL] - Specify the time zone for the execution. This will modify the actual time relative to your time zone. If the time zone is invalid, an error is thrown. By default (if this is omitted) the local time zone will be used. You can check all time zones available at [Moment Timezone Website](http://momentjs.com/timezone/). Probably don't use both `timeZone` and `utcOffset` together or weird things may happen.
+        - `timeZone` - [OPTIONAL] - Specify the time zone for the execution. This will modify the actual time relative to your time zone. If the time zone is invalid, an error is thrown. By default (if this is omitted) the local time zone will be used. You can check the various time zones format accepted in the [Luxon documentation](https://github.com/moment/luxon/blob/master/docs/zones.md#specifying-a-zone). Note: This parameter supports minutes offsets, e.g. `UTC+5:30`. **Warning**: Probably don't use both `timeZone` and `utcOffset` together or weird things may happen.
         - `context` - [OPTIONAL] - The context within which to execute the onTick method. This defaults to the cronjob itself allowing you to call `this.stop()`. However, if you change this you'll have access to the functions and values within your context object.
         - `runOnInit` - [OPTIONAL] - This will immediately fire your `onTick` function as soon as the requisite initialization has happened. This option is set to `false` by default for backwards compatibility.
-        - `utcOffset` - [OPTIONAL] - This allows you to specify the offset of your time zone rather than using the `timeZone` param. This should be an integer amount representing the number of minutes offset (like `120` for +2 hours or `-90` for -1.5 hours) Probably don't use both `timeZone` and `utcOffset` together or weird things may happen.
+        - `utcOffset` - [OPTIONAL] - This allows you to specify the offset of your time zone rather than using the `timeZone` param. This should be an integer representing the number of minutes offset (like `120` for +2 hours or `-90` for -1.5 hours). **Warning**: Minutes offsets < 60 and >-60 will be treated as an offset in hours. This means a minute offset of `30` means an offset of +30 hours. Use the `timeZone` param in this case. This behavior [is planned to be removed in V3](https://github.com/kelektiv/node-cron/pull/685#issuecomment-1676417917). **Warning**: Probably don't use both `timeZone` and `utcOffset` together or weird things may happen.
         - `unrefTimeout` - [OPTIONAL] - If you have code that keeps the event loop running and want to stop the node process when that finishes regardless of the state of your cronjob, you can do so making use of this parameter. This is off by default and cron will run as if it needs to control the event loop. For more information take a look at [timers#timers_timeout_unref](https://nodejs.org/api/timers.html#timers_timeout_unref)       from the NodeJS docs.
     - `start` - Runs your job.
     - `stop` - Stops your job.

lib/time.js

@@ -152,17 +152,26 @@ function CronTime(luxon) {
 			}
 
 			if (typeof this.utcOffset !== 'undefined') {
-				let offset =
+				const offsetHours = parseInt(
 					this.utcOffset >= 60 || this.utcOffset <= -60
 						? this.utcOffset / 60
-						: this.utcOffset;
-				offset = parseInt(offset);
+						: this.utcOffset
+				);
+
+				const offsetMins =
+					this.utcOffset >= 60 || this.utcOffset <= -60
+						? Math.abs(this.utcOffset - offsetHours * 60)
+						: 0;
+				const offsetMinsStr = offsetMins >= 10 ? offsetMins : '0' + offsetMins;
 
 				let utcZone = 'UTC';
-				if (offset < 0) {
-					utcZone += offset;
-				} else if (offset > 0) {
-					utcZone += `+${offset}`;
+
+				if (parseInt(this.utcOffset) < 0) {
+					utcZone += `${
+						offsetHours === 0 ? '-0' : offsetHours
+					}:${offsetMinsStr}`;
+				} else {
+					utcZone += `+${offsetHours}:${offsetMinsStr}`;
 				}
 
 				date = date.setZone(utcZone);

tests/cron.test.js

@@ -398,7 +398,7 @@ describe('cron', () => {
 	});
 
 	describe('with timezone', () => {
-		it('should run a job using cron syntax', () => {
+		it('should run a job using cron syntax with a timezone', () => {
 			const clock = sinon.useFakeTimers();
 			const callback = jest.fn();
 			const luxon = require('luxon');
@@ -436,6 +436,46 @@ describe('cron', () => {
 			expect(callback).toHaveBeenCalledTimes(1);
 		});
 
+		it('should run a job using cron syntax with a "UTC+HH:mm" offset as timezone', () => {
+			const clock = sinon.useFakeTimers();
+			const callback = jest.fn();
+			const luxon = require('luxon');
+
+			// Current time
+			const d = luxon.DateTime.local();
+
+			// Current time with zone offset
+			let zone = 'UTC+5:30';
+			let t = luxon.DateTime.local().setZone(zone);
+
+			// If current offset is UTC+5:30, switch to UTC+6:30..
+			if (t.hour === d.hour && t.minute === d.minute) {
+				zone = 'UTC+6:30';
+				t = t.setZone(zone);
+			}
+			expect(`${d.hour}:${d.minute}`).not.toBe(`${t.hour}:${t.minute}`);
+
+			// If t = 59s12m then t.setSeconds(60)
+			// becomes 00s13m so we're fine just doing
+			// this and no testRun callback.
+			t = t.plus({ seconds: 1 });
+			// Run a job designed to be executed at a given
+			// time in `zone`, making sure that it is a different
+			// hour than local time.
+			const job = new cron.CronJob(
+				t.second + ' ' + t.minute + ' ' + t.hour + ' * * *',
+				callback,
+				null,
+				true,
+				zone
+			);
+
+			clock.tick(1000);
+			clock.restore();
+			job.stop();
+			expect(callback).toHaveBeenCalledTimes(1);
+		});
+
 		it('should run a job using a date', () => {
 			const luxon = require('luxon');
 			let zone = 'America/Chicago';
@@ -828,18 +868,64 @@ describe('cron', () => {
 			expect(callback).toHaveBeenCalledTimes(1);
 		});
 
+		it('should run a job using cron syntax with numeric format utcOffset with minute support', () => {
+			const clock = sinon.useFakeTimers();
+			const callback = jest.fn();
+			const luxon = require('luxon');
+			// Current time
+			const t = luxon.DateTime.local();
+
+			/**
+			 * in order to avoid the minute offset being treated as hours (when `-60 < utcOffset < 60`) regardless of the local timezone,
+			 * and the maximum possible offset being +14:00, we simply add 80 minutes to that offset.
+			 * this implicit & undocumented behavior is planned to be removed in V3 anyway:
+			 * https://github.com/kelektiv/node-cron/pull/685#issuecomment-1676417917
+			 */
+			const minutesOffset = 14 * 60 + 80; // 920
+
+			// UTC Offset decreased by minutesOffset
+			const utcOffset = t.offset - minutesOffset;
+
+			const job = new cron.CronJob(
+				t.second + ' ' + t.minute + ' ' + t.hour + ' * * *',
+				callback,
+				null,
+				true,
+				null,
+				null,
+				null,
+				utcOffset
+			);
+
+			// tick 1 sec before minutesOffset
+			clock.tick(1000 * minutesOffset * 60 - 1);
+			expect(callback).toHaveBeenCalledTimes(0);
+
+			clock.tick(1);
+			clock.restore();
+			job.stop();
+			expect(callback).toHaveBeenCalledTimes(1);
+		});
+
+		/**
+		 * this still works implicitly (without minute support) because the string conversion
+		 * to integer removes everything after the colon, i.e. '(+/-)HH:mm' becomes (+/-)HH,
+		 * but this is an undocumented behavior that will be removed in V3:
+		 * https://github.com/kelektiv/node-cron/pull/685#issuecomment-1676394391
+		 */
 		it('should run a job using cron syntax with string format utcOffset', () => {
 			const clock = sinon.useFakeTimers();
 			const callback = jest.fn();
 			const luxon = require('luxon');
 			// Current time
 			const t = luxon.DateTime.local();
 			// UTC Offset decreased by an hour (string format '(+/-)HH:mm')
-			const utcOffset = t.offset - 60;
-			let utcOffsetString = utcOffset > 0 ? '+' : '-';
-			utcOffsetString += ('0' + Math.floor(Math.abs(utcOffset) / 60)).slice(-2);
-			utcOffsetString += ':';
-			utcOffsetString += ('0' + (utcOffset % 60)).slice(-2);
+			// We support only HH support in offset as we support string offset in Timezone.
+			const minutesOffset = t.offset - Math.floor((t.offset - 60) / 60) * 60;
+			const utcOffset = t.offset - minutesOffset;
+			const utcOffsetString = `${utcOffset > 0 ? '+' : '-'}${(
+				'0' + Math.floor(Math.abs(utcOffset) / 60)
+			).slice(-2)}:${('0' + (utcOffset % 60)).slice(-2)}`;
 
 			const job = new cron.CronJob(
 				t.second + ' ' + t.minute + ' ' + t.hour + ' * * *',
@@ -852,8 +938,8 @@ describe('cron', () => {
 				utcOffsetString
 			);
 
-			// tick 1 sec before an hour
-			clock.tick(1000 * 60 * 60 - 1);
+			// tick 1 sec before minutesOffset
+			clock.tick(1000 * 60 * minutesOffset - 1);
 			expect(callback).toHaveBeenCalledTimes(0);
 
 			// tick 1 sec

tests/crontime.test.js

@@ -648,18 +648,6 @@ describe('crontime', () => {
 		clock.restore();
 	});
 
-	it('should accept 4 as a valid UTC offset', () => {
-		const clock = sinon.useFakeTimers();
-
-		const cronTime = new cron.CronTime('0 11 * * *', null, 5);
-		const expected = luxon.DateTime.local().plus({ hours: 6 }).toSeconds();
-		const actual = cronTime.sendAt().toSeconds();
-
-		expect(actual).toEqual(expected);
-
-		clock.restore();
-	});
-
 	it('should detect real date in the past', () => {
 		const clock = sinon.useFakeTimers();