Create new DurationPipe

.gitignore

@@ -13,6 +13,9 @@ DateFormatPipe.d.ts
 FromUnixPipe.js
 FromUnixPipe.js.map
 FromUnixPipe.d.ts
+DurationPipe.js
+DurationPipe.js.map
+DurationPipe.d.ts
 index.js
 index.js.map
 index.d.ts

DurationPipe.spec.ts

@@ -0,0 +1,21 @@
+import {DurationPipe} from './DurationPipe';
+
+describe('DurationPipe', () => {
+  var pipe: DurationPipe;
+
+  beforeEach(() => pipe = new DurationPipe());
+
+  describe('#transform', () => {
+    it('should throw when provided no arguments', () => {
+      expect(() => pipe.transform(128)).toThrow(new Error('DurationPipe: missing required time unit argument'));
+    });
+
+    it('should convert a duration to a human-readable string', () => {
+      expect(pipe.transform(24, ['hours'])).toEqual('a day');
+      expect(pipe.transform(27, ['days'])).toEqual('a month');
+      expect(pipe.transform(365, ['seconds'])).toEqual('6 minutes');
+      expect(pipe.transform(365, ['days'])).toEqual('a year');
+      expect(pipe.transform(86400, ['seconds'])).toEqual('a day');
+    });
+  });
+});

DurationPipe.ts

@@ -0,0 +1,12 @@
+import {Pipe, PipeTransform} from 'angular2/core';
+import * as moment from 'moment';
+
+@Pipe({ name: 'amDuration' })
+export class DurationPipe implements PipeTransform {
+  transform(value: any, args?: string[]): string {
+    if (typeof args === 'undefined' || args.length !== 1) {
+      throw new Error('DurationPipe: missing required time unit argument');
+    }
+    return moment.duration(value, args[0]).humanize();
+  }
+}

README.md

@@ -84,6 +84,22 @@ import {DateFormatPipe, FromUnixPipe} from 'angular2-moment';
 
 Prints `Last updated: 01:46PM`
 
+## amDuration pipe
+
+``` typescript
+import {DurationPipe} from 'angular2-moment';
+
+@Component({
+  selector: 'app',
+  pipes: [DurationPipe],
+  template: `
+    Uptime: <time>{{ 365 | amDuration:'seconds' }}</time>
+  `
+})
+```
+
+Prints `Uptime: 6 minutes`
+
 Complete Example
 ----------------
 

index.ts

@@ -2,3 +2,4 @@ export * from './TimeAgoPipe';
 export * from './CalendarPipe';
 export * from './DateFormatPipe';
 export * from './FromUnixPipe';
+export * from './DurationPipe';

package.json

@@ -18,6 +18,10 @@
     "DateFormatPipe.js.map",
     "DateFormatPipe.d.ts",
     "DateFormatPipe.ts",
+    "DurationPipe.js",
+    "DurationPipe.js.map",
+    "DurationPipe.d.ts",
+    "DurationPipe.ts",
     "TimeAgoPipe.js",
     "TimeAgoPipe.js.map",
     "TimeAgoPipe.d.ts",

tsconfig.json

@@ -17,6 +17,8 @@
     "DateFormatPipe.spec.ts",
     "FromUnixPipe.ts",
     "FromUnixPipe.spec.ts",
+    "DurationPipe.ts",
+    "DurationPipe.spec.ts",
     "TimeAgoPipe.ts",
     "TimeAgoPipe.spec.ts",
     "index.ts"