MediaWiki:Gadget-minipedia.js

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/**
 * Make Minipedia magics
 *
 * Dependencies: mediawiki.util
 *
 * See https://phabricator.wikimedia.org/tag/minipedia/
 *
 * @revision 2020-06-27
 */
( function ( $, mw ) {

	/*
	 * CONFIGURATION/LOCALIZATION INSTRUCTIONS
	 *
	 * Declare somewhere something like this:
	 *
	 *   // assure that you do not overwrite other-people customizations
	 *   window.MiniPedia      = window.MiniPedia      || {};
	 *   window.MiniPedia.L10N = window.MiniPedia.L10N || {};
	 *
	 *   // then customize something
 	 *   window.MiniPedia.editIntro      = 'Project:How to create';
	 *   window.MiniPedia.L10N.minipedia = 'Otherpedia';
	 */

	// load localization defaults
	var DEFAULTS = {
		// namespace prefix configured in your LocalSettings.php
		namespace: 'Mini',

		// namespace number configured in your LocalSettings.php
		namespaceNum: 3002,

		// default edit intro page title
		editIntro: 'Progetto:Minipedia/Creazione voce',

		// how much characters should have a word to be considered too much lon
		// this somehow help people with dyslexia
		longWordLen: 13,

		// maximum number of acceptable complex words to help people with dyslexia
		maxComplexWords: 10,

		// min and max number of suggested words to somehow mitigate attention span problems
		maxWords: 700,

		// maximum number of suggested newlines
		maxTotalLines: 180,

		// localization stuff
		L10N: {
			minipedia: "Minipedia",
			minipediaShort: "Mini",
			normalpedia: "Wikipedia Test",
			normalpediaShort: "WikipediaTest",
			openMinipedia: "Apri Minipedia",
			openNormalpedia: "Apri Wikipedia Test",
			createMinipediaPageTitle: "Accesso Minipedia",
			createMinipediaPageBody: "Sii il primo a creare una versione più ridotta e più accessibile di questa voce, in Minipedia!",
			statsTitle: "Mini Report",
			statsWords: "Parole",
			statsLines: "Paragrafi",
			statsComplexWords: "Parole complesse",
		},
	};

	// global configuration
	window.MiniPedia = window.MiniPedia || {};

	// shortcut
	var mp = window.MiniPedia;

	// inherit default configurations
	$.extend( true, mp, DEFAULTS );

	// another shortcut
	var L10N = mp.L10N;

	/**
	 * Lazy shortcut to obtain just the first API result
	 *
	 * @param  {Object} response API Response
	 * @return {Object} page object
	 */
	function justFirstQueryPage( response ) {

		// no response no party
		if( !response.query || !response.query.pages ) {
			throw 'no valid API response';
		}

		// the list should contain just one page
		var pages = response.query.pages;
		for( var id in pages ) {
			return pages[ id ];
		}

		// no page no party
		return false;
	};

	/**
	 * Get a fresh MediaWiki API object
	 *
	 * @return mw.Api
	 */
	function mwApi() {
		return mw.loader.using( 'mediawiki.api' ).then( function() {
			return new mw.Api();
		} );
	};

	/**
	 * Check if a page title already exists
	 *
	 * @param title Page title
	 * @return Promise
	 */
	function pageExists( title ) {

		// prepare the API request
		var request = {
			action: 'query',
			prop: 'info',
			titles: title,
		};

		// eventually load API stuff
		return mwApi().then( function( api ) {

			// make the API request			
			return api.get( request ).then( function ( response ) {

				// check if it exists
				var page = justFirstQueryPage( response );
				if( page && page.pageid && page.pageid > 0 ) {
					return page;
				}

				return false;
			} );
		} );
	};

	/**
	 * Query the current page plain text
	 *
	 * @return Promise
	 */
	function queryPlainText() {

		// complete page title with namespace
		var pageName = mw.config.get( 'wgPageName' );

		// prepare the API request
		// See https://phabricator.wikimedia.org/T259332
		var request = {
			action: 'query',
			prop: 'extracts',
			titles: pageName,
			explaintext: 1,
			exlimit: 1,
			exsectionformat: 'plain',
		};

		// this will return a Promise resolving the page plain text, returned upstream
		return mwApi().then( function( api ) {

			// make the API request and return a Promise
			return api.get( request ).then( function( response ) {
		
				// resolve the Promise with the page content
				var page = justFirstQueryPage( response );
				if( page && page.pageid && page.pageid > 0 && page.extract ) {
					return page.extract; 
				}

				// no content
				return false;
				
			} );
		} );
	};

	/**
	 * Prepare the wiki
	 */
	function prepareNormalpedia() {
	
		// normal page title and mini version
		var pageName = mw.config.get( 'wgPageName' );

		// prepare the Minipedia title object
		var miniTitleObject = new mw.Title( pageName,  mp.namespaceNum );

		// minipedia page title with prefix
		var miniPageName = miniTitleObject.getPrefixedText();

		// minipedia page URL
		var miniPageUrl = miniTitleObject.getUrl();

		/**
		 * Go to the Minipedia page in edit mode
		 *
		 * The page in the main namespace will be preloaded.
		 
		 */
		function goToMinipediaEditPage() {

			/**
			 * Build the query string to edit a page
			 *
			 * TODO: eventually add VisualEditor support
			 */
			var editPageQueryString = {
				action: 'edit',
				title: miniPageName,
				preload: pageName,
				editintro: mp.editIntro,			
			};

			// '/index.php'
			var wgScript = mw.config.get( 'wgScript' );

			// go to the edit page URL
			window.location = wgScript + '?' + $.param( editPageQueryString );
		};

		// add a "Minipedia"
		var miniVersionPortletLink = mw.util.addPortletLink(
			'p-namespaces',
			miniPageUrl,
			L10N.minipediaShort,
			'ca-minipedia',
			L10N.openMinipedia,
			'n'
		);

		// on the mini toolback click, check if a mini version exists
		$( miniVersionPortletLink ).click( function( e ) {
		
			// wait for some information
			$.when(
				// check if the page really exists
				pageExists( miniPageName ),

				// allow to open OO UI windows
				mw.loader.using( 'oojs-ui-windows' )

			).done( function( miniPageExists, loader ) {

				// check if the page already exist
				if( miniPageExists ) {

					// just redirect to the Minipedia version
					window.location = miniPageUrl;
				} else {

					// ask if you want to create the page

					// create message dialog window
					var messageDialog = new OO.ui.MessageDialog();
					var windowManager = new OO.ui.WindowManager();
					$( 'body' ).append( windowManager.$element );
					windowManager.addWindows( [ messageDialog ] );

					// configure and open dialog
					var windowInstance = windowManager.openWindow( messageDialog, {
						title:   L10N.createMinipediaPageTitle,
						message: L10N.createMinipediaPageBody,
					} );

					// check if you accepted the page creation
					windowInstance.closed.then( function ( data ) {

						// user is confirming action
						if( data.action === 'accept' ) {

							// go go go!
							goToMinipediaEditPage();
						}
					} );

				}
				// end if page exists

			} );
			// end $.when()

			// avoid scrolling to the top
			e.preventDefault();

		} );
		// end $( miniVersionPortletLink ).click

	};
	// end prepareNormalWiki()

	/**
	 * Calculate some stats over a text
	 */
	function textStats( text ) {

		var stats = {};

		text = text.trim();

		// count long words
		var totalLongWords = 0;
		var word, words = text.split( /\s+/ );
		for( var i = 0; i < words.length; i++ ) {
			word = words[i];
			if( word.length > mp.longWordLen ) {
				totalLongWords++;
			}
		}

		// how much lines?
		stats.totalLines = text.split( /\n+/ ).length;

		// how much words?
		stats.totalWords = words.length;

		// how much of these words are so much long?
		// See 'longWordLen'
		stats.totalLongWords = totalLongWords;

		return stats;
	};

	/**
	 * Query content stats of the current page
	 *
	 * @return Promise
	 */
	function queryContentStats() {
		return queryPlainText().then( textStats );
	};

	/**
	 * Prepare the Minipedia stats box
	 */
	function prepareMinipediaStatsBox() {

		// body container
		var $contentText = $( '#mw-content-text' );

		// prepare the DOM tree
		var $container = $( '<div>' );
		var $table = $( '<table>' );
		var $thead = $( '<tbody>' );

		// prepare the stats container
		$container.addClass( 'minipedia-stats' );

		// put a title
		$container.append( $( '<h2>' ).text( mp.L10N.statsTitle ) );

		// put the table
		$container.append( $table );

		// prepare the table
		$table.addClass( 'wikitable' )
		      .append( $thead );

		/**
		 * Append a row (with a label and a value) into a table
		 *
		 * @param {Object} jQuery table
		 * @param {String} className
		 * @param {String} label
		 * @param {int} value
		 * @param {int} maxValue
		 */
		function appendTableStatsRow( $table, className, label, value, maxValue ) {
			var $tr = $( '<tr>' );
			var $tdLabel = $( '<td>' ).text( label );
			var $tdValue = $( '<td>' ).text( value );

			// build the table row
			$tr.addClass( 'minipedia-stats-row-' + className );
			$tr.append( $tdLabel ).append( $tdValue );

			// attach some data
			$tr.data( 'minipedia', {
				value: value,
				max:  maxValue
			} );

			// eventually emphasize if something is wrong
			if( maxValue && value > maxValue ) {
				// how much the value is over the maxValue?
				// this number should be an integer value, with some intermediate
				// var factor = value / maxValue;

				$tr.addClass( 'minipedia-stats-row-problem' );
			}

			$table.append( $tr );
		};

		// query the page plain text
		queryContentStats().then( function( stats ) {

			// show the number of words, lines and complex words (actually just long words)
			appendTableStatsRow( $table, 'long-words', L10N.statsComplexWords, stats.totalLongWords, mp.maxComplexWords );
			appendTableStatsRow( $table, 'words',      L10N.statsWords,        stats.totalWords,     mp.maxStatsWords   );
			appendTableStatsRow( $table, 'lines',      L10N.statsLines,        stats.totalLines,     mp.maxTotalLines   );
		} );

		// show the stats container at the bottom of the page
		$contentText.append( $container );
	};

	/**
	 * Prepare the Minipedia namespace
	 */
	function prepareMinipedia() {

		// action of the page (edit, view etc.)
		var action = mw.config.get( 'wgAction' );

		// normal page title and mini version
		var pageName = mw.config.get( 'wgTitle' );

		// prepare the Normalpedia title object
		var normalTitleObject = new mw.Title( pageName );

		// minipedia page title with prefix
		var normalPageName = normalTitleObject.getPrefixedText();

		// minipedia page URL
		var normalPageUrl = normalTitleObject.getUrl();

		// add a "Minipedia"
		var normalVersionPortletLink = mw.util.addPortletLink(
			'p-namespaces',
			normalPageUrl,
			L10N.normalpediaShort,
			'ca-normalpedia',
			L10N.openNormalpedia
		);

		// check if we are in view mode
		if( action === 'view' ) {

			// in view mode we can fetch the stats
			prepareMinipediaStatsBox();
		}
	};
	// end prepareMinipedia()

	// work only in the main namespace
	var ns = mw.config.get( 'wgNamespaceNumber' );
	if( ns === 0 ) {
		prepareNormalpedia();
	} else if( ns == mp.namespaceNum ) {
		prepareMinipedia();
	}
	// end namespace zero check

} )( $, mw );