Log tofu detection event

This only works if webfonts enabled (the checkbox is checked).

Change-Id: Ibbedc6a34dacb983f156d8a33afa5ab625e32f5f

Resources.php

@@ -79,7 +79,10 @@ $wgResourceModules['ext.uls.init'] = array(
 
 $wgResourceModules['ext.uls.eventlogger'] = array(
 	'scripts' => 'resources/js/ext.uls.eventlogger.js',
-	'dependencies' => 'schema.UniversalLanguageSelector',
+	'dependencies' => array(
+		'schema.UniversalLanguageSelector',
+		'schema.UniversalLanguageSelector-tofu',
+	),
 ) + $resourcePaths;
 
 $wgResourceModules['ext.uls.i18n'] = array(

UniversalLanguageSelector.php

@@ -216,20 +216,29 @@ $GLOBALS['wgExtensionFunctions'][] = function () {
 		};
 	}
 
-	// If EventLogging integration is enabled, first ensure that the
-	// EventLogging extension is present, then declare schema module.
+	// If EventLogging integration is enabled, first ensure that
+	// the EventLogging extension is present, then declare schema module.
 	// If it is not present, emit a warning and disable logging.
 	if ( $wgULSEventLogging ) {
 		if ( class_exists( 'ResourceLoaderSchemaModule' ) ) {
+			// NB: When updating the schema, remember also to update the version
+			// in the schema default in the JavaScript library.
 			/// @see https://meta.wikimedia.org/wiki/Schema:UniversalLanguageSelector
 			$wgResourceModules['schema.UniversalLanguageSelector'] = array(
 				'class' => 'ResourceLoaderSchemaModule',
 				'schema' => 'UniversalLanguageSelector',
 				'revision' => 7327441,
 			);
+
+			/// @see https://meta.wikimedia.org/wiki/Schema:UniversalLanguageSelector-tofu
+			$wgResourceModules['schema.UniversalLanguageSelector-tofu'] = array(
+				'class' => 'ResourceLoaderSchemaModule',
+				'schema' => 'UniversalLanguageSelector-tofu',
+				'revision' => 7629564,
+			);
 		} else {
-			wfWarn( 'UniversalLanguageSelector is configured to use EventLogging, but '
-				. 'the extension is is not available. Disabling wgULSEventLogging.' );
+			wfWarn( 'UniversalLanguageSelector is configured to use EventLogging, '
+				. 'but the extension is not available. Disabling wgULSEventLogging.' );
 			$wgULSEventLogging = false;
 		}
 	}

resources/js/ext.uls.eventlogger.js

@@ -35,7 +35,6 @@
 		init: function () {
 			var eventLogger = this;
 
-			// Set event defaults and make the
 			mw.eventLog.setDefaults( 'UniversalLanguageSelector', {
 				version: 1,
 				token: mw.user.id(),
@@ -43,6 +42,11 @@
 				interfaceLanguage: mw.config.get( 'wgUserLanguage' )
 			} );
 
+			mw.eventLog.setDefaults( 'UniversalLanguageSelector-tofu', {
+				version: 1,
+				token: mw.user.id()
+			} );
+
 			eventLogger.logEventQueue.fire();
 		},
 
@@ -50,17 +54,20 @@
 		 * Local wrapper for 'mw.eventLog.logEvent'
 		 *
 		 * @param {Object} event Event action and optional fields
+		 * @param {String} schema The schema; 'UniversalLanguageSelector' is the default
 		 * @return {jQuery.Promise} jQuery Promise object for the logging call
 		 */
-		log: function ( event ) {
+		log: function ( event, schema ) {
 			// We need to create our own deferred for two reasons:
 			//  - logEvent might not be executed immediately
 			//  - we cannot reject a promise returned by it
 			// So we proxy the original promises status updates.
 			var deferred = $.Deferred();
 
+			schema = schema || 'UniversalLanguageSelector';
+
 			this.logEventQueue.add( function () {
-				mw.eventLog.logEvent( 'UniversalLanguageSelector', event )
+				mw.eventLog.logEvent( schema, event )
 					.done( deferred.resolve )
 					.fail( deferred.reject );
 			} );
@@ -85,6 +92,7 @@
 			mw.hook( 'mw.uls.font.change' ).add( $.proxy( this.fontChange, this ) );
 			mw.hook( 'mw.uls.webfonts.enable' ).add( $.proxy( this.enableWebfonts, this ) );
 			mw.hook( 'mw.uls.webfonts.disable' ).add( $.proxy( this.disableWebfonts, this ) );
+			mw.hook( 'mw.uls.webfonts.tofudetected' ).add( $.proxy( this.tofuDetected, this ) );
 
 			$( 'body' ).on( 'noresults.uls', '.uls-menu .languagefilter',
 				$.proxy( this.noSearchResults, this )
@@ -227,6 +235,17 @@
 			this.log( { action: 'webfonts-enable', context: context } );
 		},
 
+		/**
+		 * Log tofu detection
+		 * @param {string} language Code of the element in which tofu was detected
+		 */
+		tofuDetected: function ( language ) {
+			this.log( {
+				tofuElementLanguage: language,
+				webfontsEnabled: mw.webfonts.preferences.isEnabled()
+			}, 'UniversalLanguageSelector-tofu' );
+		},
+
 		/**
 		 * Log search strings which produce no search results.
 		 * @param {jQuery.event} event The orignal event

resources/js/ext.uls.webfonts.js

@@ -168,9 +168,15 @@
 						detectTofu( $.uls.data.getAutonym( language ) );
 
 					if ( tofu ) {
+						// Log the tofu detection only once per page per language
+						if ( !tofuLanguages[language] ) {
 							mw.log( 'tofu detected for ' + language );
+							mw.hook( 'mw.uls.webfonts.tofudetected' ).fire( language );
+
 							// Cache the languages with tofu
 							tofuLanguages[language] = true;
+						}
+
 						font = autonym ? 'Autonym' : defaultFont;
 					} else {
 						// No tofu and no font preference. Use system font.