New Duration class

.changeset/quick-ducks-do.md

@@ -0,0 +1,5 @@
+---
+'@layerstack/utils': major
+---
+
+breaking: Replace `getDuration()` / `humanizeDuration()` utils with `Duration` class (with `.format()` method)

packages/utils/src/lib/duration.test.ts

@@ -0,0 +1,201 @@
+import { describe, it, expect } from 'vitest';
+
+import { Duration, DurationUnits } from './duration.js';
+import { PeriodType } from './date_types.js';
+import { testDate } from './date.test.js';
+import { subDays } from 'date-fns';
+
+describe('Duration', () => {
+  it('default', () => {
+    const actual = new Duration();
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(0);
+    expect(actual.hours).equal(0);
+    expect(actual.minutes).equal(0);
+    expect(actual.seconds).equal(0);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('start/end range with strings', () => {
+    const actual = new Duration({ start: '2025-05-19', end: '2025-05-20' });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(1);
+    expect(actual.hours).equal(0);
+    expect(actual.minutes).equal(0);
+    expect(actual.seconds).equal(0);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('start/end range with Date objects', () => {
+    const actual = new Duration({ start: new Date('2025-05-19'), end: new Date('2025-05-20') });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(1);
+    expect(actual.hours).equal(0);
+    expect(actual.minutes).equal(0);
+    expect(actual.seconds).equal(0);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('start-only should use `now` for end', () => {
+    const start = subDays(new Date(), 10);
+    const actual = new Duration({ start });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(10);
+    expect(actual.hours).equal(0);
+    expect(actual.minutes).equal(0);
+    expect(actual.seconds).equal(0);
+    // expect(actual.milliseconds).equal(0); // Ignoring just in case test timing is off
+  });
+
+  it('duration option', () => {
+    const actual = new Duration({ duration: { seconds: 10 } });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(0);
+    expect(actual.hours).equal(0);
+    expect(actual.minutes).equal(0);
+    expect(actual.seconds).equal(10);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('duration option with carryover seconds', () => {
+    const actual = new Duration({ duration: { seconds: 90 } });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(0);
+    expect(actual.hours).equal(0);
+    expect(actual.minutes).equal(1);
+    expect(actual.seconds).equal(30);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('duration option with carryover minutes', () => {
+    const actual = new Duration({ duration: { minutes: 90 } });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(0);
+    expect(actual.hours).equal(1);
+    expect(actual.minutes).equal(30);
+    expect(actual.seconds).equal(0);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('duration option with carryover hours', () => {
+    const actual = new Duration({ duration: { hours: 30 } });
+    expect(actual.years).equal(0);
+    expect(actual.days).equal(1);
+    expect(actual.hours).equal(6);
+    expect(actual.minutes).equal(0);
+    expect(actual.seconds).equal(0);
+    expect(actual.milliseconds).equal(0);
+  });
+
+  it('duration comparison with explicit duration', () => {
+    const duration1 = new Duration({ duration: { seconds: 10 } });
+    const duration2 = new Duration({ duration: { seconds: 11 } });
+
+    expect(duration1 < duration2).equal(true);
+    expect(duration2 > duration1).equal(true);
+    expect(duration1 != duration2).equal(true);
+  });
+
+  it('duration comparison with dates', () => {
+    const duration1 = new Duration({ start: '2025-05-19', end: '2025-05-20' });
+    const duration2 = new Duration({ start: '2025-05-19', end: '2025-05-21' });
+
+    expect(duration1 < duration2).equal(true);
+    expect(duration2 > duration1).equal(true);
+  });
+
+  it('duration comparison with dates and duration', () => {
+    const duration = new Duration({ start: '2025-05-19', end: '2025-05-20' });
+
+    const durationSame = new Duration({ duration: { days: 1 } });
+    // TODO: Why is `valueOf()` not called implicitly?
+    // expect(duration == durationSame).equal(true);
+    expect(duration.valueOf() == durationSame.valueOf()).equal(true);
+
+    const durationMore = new Duration({ duration: { days: 2 } });
+    expect(duration < durationMore).equal(true);
+
+    const durationLess = new Duration({ duration: { hours: 3 } });
+    expect(duration > durationLess).equal(true);
+  });
+
+  it('toJSON', () => {
+    const duration = new Duration({
+      duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+    });
+    const json = duration.toJSON();
+    expect(json).eql({
+      years: 0,
+      days: 1,
+      hours: 2,
+      minutes: 3,
+      seconds: 4,
+      milliseconds: 5,
+    });
+  });
+
+  it('toJSON', () => {
+    const duration = new Duration({
+      duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+    });
+    const string = JSON.stringify(duration);
+    expect(string).eql('{"years":0,"days":1,"hours":2,"minutes":3,"seconds":4,"milliseconds":5}');
+  });
+
+  it('reconstruct from JSON', () => {
+    const duration = new Duration({
+      duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+    });
+    const json = JSON.parse(JSON.stringify(duration));
+    const duration2 = new Duration({ duration: json });
+
+    expect(duration2.years).equal(0);
+    expect(duration2.days).equal(1);
+    expect(duration2.hours).equal(2);
+    expect(duration2.minutes).equal(3);
+    expect(duration2.seconds).equal(4);
+    expect(duration2.milliseconds).equal(5);
+  });
+
+  describe('format', () => {
+    it('default', () => {
+      const duration = new Duration({
+        duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+      });
+      const actual = duration.format();
+      expect(actual).equal('1d 2h 3m 4s 5ms');
+    });
+
+    it('long variant', () => {
+      const duration = new Duration({
+        duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+      });
+      const actual = duration.format({ variant: 'long' });
+      expect(actual).equal('1 day and 2 hours and 3 minutes and 4 seconds and 5 milliseconds');
+    });
+
+    it('minUnits', () => {
+      const duration = new Duration({
+        duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+      });
+      const actual = duration.format({ minUnits: DurationUnits.Hour });
+      expect(actual).equal('1d 2h');
+    });
+
+    it('totalUnits', () => {
+      const duration = new Duration({
+        duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+      });
+      const actual = duration.format({ totalUnits: 3 });
+      expect(actual).equal('1d 2h 3m');
+    });
+  });
+
+  it('toString', () => {
+    const duration = new Duration({
+      duration: { days: 1, hours: 2, minutes: 3, seconds: 4, milliseconds: 5 },
+    });
+    const actual = duration.toString();
+    expect(actual).equal('1d 2h 3m 4s 5ms');
+  });
+});