Replace moment.js with Date.toLocaleString

Bug: T224626
Change-Id: Ib312821d2c72c2570cec29153557fd44e4db2bf7

extension.json

@@ -439,8 +439,7 @@
 			"mmv.ui.ondemandshareddependencies",
 			"mmv.ui.reuse.shareembed",
 			"mmv.ui.download.pane",
-			"mmv.ui.tipsyDialog",
-			"moment"
+			"mmv.ui.tipsyDialog"
 		]
 	},
 	"EventLoggingSchemas": {

resources/mmv/mmv.js

@@ -1026,7 +1026,7 @@
 	 * Preloads JS and CSS dependencies that aren't needed to display the first image, but could be needed later
 	 */
 	MMVP.preloadDependencies = function () {
-		mw.loader.load( [ 'mmv.ui.reuse.shareembed', 'moment' ] );
+		mw.loader.load( [ 'mmv.ui.reuse.shareembed' ] );
 	};
 
 	/**

resources/mmv/ui/mmv.ui.metadataPanel.js

@@ -757,19 +757,9 @@
 		mw.mmv.attributionLogger.logAttribution( imageData );
 
 		if ( imageData.creationDateTime ) {
-			// Use the raw date until moment can try to interpret it
-			panel.setDateTime( imageData.creationDateTime );
-
-			this.formatDate( imageData.creationDateTime ).then( function ( formattedDate ) {
-				panel.setDateTime( formattedDate, true );
-			} );
+			panel.setDateTime( this.formatDate( imageData.creationDateTime ), true );
 		} else if ( imageData.uploadDateTime ) {
-			// Use the raw date until moment can try to interpret it
-			panel.setDateTime( imageData.uploadDateTime );
-
-			this.formatDate( imageData.uploadDateTime ).then( function ( formattedDate ) {
-				panel.setDateTime( formattedDate );
-			} );
+			panel.setDateTime( this.formatDate( imageData.uploadDateTime ) );
 		}
 
 		this.buttons.set( imageData, repoData );
@@ -814,29 +804,24 @@
 	 * Unrecognized strings are returned unchanged.
 	 *
 	 * @param {string} dateString
-	 * @return {jQuery.Deferred}
+	 * @return {string} formatted date
 	 */
 	MPP.formatDate = function ( dateString ) {
-		var deferred = $.Deferred(),
-			date;
-
-		mw.loader.using( 'moment', function () {
-			/* global moment */
-			date = moment( dateString );
-
-			if ( date.isValid() ) {
-				deferred.resolve( date.format( 'LL' ) );
-			} else {
-				deferred.resolve( dateString );
+		var date,
+			lang = mw.config.get( 'wgUserLanguage' );
+		if ( lang === 'en' ) { lang = 'en-GB'; } // for D MMMM YYYY format
+		date = new Date( dateString );
+		try {
+			if ( date instanceof Date && !isNaN( date ) ) {
+				return date.toLocaleString( lang, {
+					day: 'numeric',
+					month: 'long',
+					year: 'numeric'
+				} );
 			}
-		}, function ( error ) {
-			deferred.reject( error );
-			if ( window.console && window.console.error ) {
-				window.console.error( 'mw.loader.using error when trying to load moment', error );
-			}
-		} );
-
-		return deferred.promise();
+		} catch ( ignore ) {}
+		// fallback to original date string
+		return dateString;
 	};
 
 	/**

tests/qunit/mmv/ui/mmv.ui.metadataPanel.test.js

@@ -113,16 +113,8 @@
 				getArticlePath: function () { return 'Foo'; },
 				isCommons: function () { return false; }
 			},
-			oldMoment = window.moment,
-			// custom clock will give MPP.formatDate some time to load moment.js
 			clock = this.sandbox.useFakeTimers();
 
-		/* window.moment = function ( date ) {
-			// This has no effect for now, since writing this test revealed that our moment.js
-			// doesn't have any language configuration
-			return oldMoment( date ).lang( 'fr' );
-		};*/
-
 		panel.setImageInfo( image, imageData, repoData );
 
 		assert.strictEqual( panel.$title.text(), title, 'Title is correctly set' );
@@ -164,7 +156,6 @@
 
 		assert.ok( panel.$datetime.text().indexOf( '25 August 2013' ) > 0, 'Correct date is displayed' );
 
-		window.moment = oldMoment;
 		clock.restore();
 	} );
 
@@ -181,11 +172,9 @@
 		var $qf = $( '#qunit-fixture' ),
 			panel = new mw.mmv.ui.MetadataPanel( $qf, $( '<div>' ).appendTo( $qf ), mw.storage, new mw.mmv.Config( {}, mw.config, mw.user, new mw.Api(), mw.storage ) ),
 			date1 = 'Garbage',
-			promise = panel.formatDate( date1 );
+			result = panel.formatDate( date1 );
 
-		return promise.then( function ( result ) {
-			assert.strictEqual( result, date1, 'Invalid date is correctly ignored' );
-		} );
+		assert.strictEqual( result, date1, 'Invalid date is correctly ignored' );
 	} );
 
 	QUnit.test( 'About links', function ( assert ) {