adfTimeAgo pipe and demo (#2182)

ng2-components/ng2-alfresco-core/src/pipes/time-ago.pipe.ts

@@ -0,0 +1,32 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as moment from 'moment';
+
+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+    name: 'adfTimeAgo'
+})
+export class TimeAgoPipe implements PipeTransform {
+
+    transform(value: Date) {
+        const then = moment(value);
+        const diff = moment().diff(then, 'days');
+        return diff > 7 ? then.format('DD/MM/YYYY HH:mm') : then.fromNow();
+    }
+}