MOBILE-3565 pipes: Add format date pipe

src/app/pipes/format-date.pipe.ts

@@ -0,0 +1,70 @@
+// (C) Copyright 2015 Moodle Pty 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 { Pipe, PipeTransform } from '@angular/core';
+import { CoreTimeUtils } from '@services/utils/time';
+import { CoreLogger } from '@singletons/logger';
+
+/**
+ * Filter to format a date.
+ */
+@Pipe({
+    name: 'coreFormatDate',
+})
+export class CoreFormatDatePipe implements PipeTransform {
+
+    protected logger: CoreLogger;
+
+    constructor() {
+        this.logger = CoreLogger.getInstance('CoreFormatDatePipe');
+    }
+
+    /**
+     * Format a date.
+     *
+     * @param timestamp Timestamp to format (in milliseconds). If not defined, use current time.
+     * @param format Format to use. It should be a string code to handle i18n (e.g. core.strftimetime).
+     *               Defaults to strftimedaydatetime.
+     * @param convert If true, convert the format from PHP to Moment. Set it to false for Moment formats.
+     * @return Formatted date.
+     */
+    transform(timestamp: string | number, format?: string, convert?: boolean): string {
+        timestamp = timestamp || Date.now();
+        format = format || 'strftimedaydatetime';
+
+        if (typeof timestamp == 'string') {
+            // Convert the value to a number.
+            const numberTimestamp = parseInt(timestamp, 10);
+            if (isNaN(numberTimestamp)) {
+                this.logger.error('Invalid value received', timestamp);
+
+                return timestamp;
+            }
+            timestamp = numberTimestamp;
+        }
+
+        // Add "core." if needed.
+        if (format.indexOf('strf') == 0 || format.indexOf('df') == 0) {
+            format = 'core.' + format;
+        }
+
+        if (typeof convert == 'undefined') {
+            // Initialize convert param. Set it to false if it's a core.df format, set it to true otherwise.
+            convert = format.indexOf('core.df') != 0;
+        }
+
+        return CoreTimeUtils.instance.userDate(timestamp, format, convert);
+    }
+
+}

src/app/pipes/pipes.module.ts

@@ -14,6 +14,7 @@
 
 import { NgModule } from '@angular/core';
 import { CoreCreateLinksPipe } from './create-links.pipe';
+import { CoreFormatDatePipe } from './format-date.pipe';
 import { CoreNoTagsPipe } from './no-tags.pipe';
 import { CoreTimeAgoPipe } from './time-ago.pipe';
 
@@ -22,12 +23,14 @@ import { CoreTimeAgoPipe } from './time-ago.pipe';
         CoreCreateLinksPipe,
         CoreNoTagsPipe,
         CoreTimeAgoPipe,
+        CoreFormatDatePipe,
     ],
     imports: [],
     exports: [
         CoreCreateLinksPipe,
         CoreNoTagsPipe,
         CoreTimeAgoPipe,
+        CoreFormatDatePipe,
     ],
 })
 export class CorePipesModule {}