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
 */
$.when( $.ready ).then( function () {

	/*
	 * 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';
	 *
	 * For all the strings available in the 'MiniPedia.L10N' object
	 * see the L10N_DEFAULTS variable below.
	 */

	// load localization defaults
	var L10N_DEFAULTS = {
		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!",
	};

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

	// shortcut for the global configuration file (mp = mini-pedia)
	var mp = window.MiniPedia;

	// default namespace informations
	mp.namespace    = mp.namespace    || 'Mini';
	mp.namespaceNum = mp.namespaceNum || 3002;

	// default edit intro page title
	mp.editIntro = mp.editIntro || 'Progetto:Minipedia/Creazione voce';

	// localization stuff
	mp.L10N = mp.L10N || {};

	// shortcut
	var L10N = mp.L10N;

	// load the defaults
	for( var key in L10N_DEFAULTS ) {
		if( !L10N[ key ] ) {
			L10N[ key ] = L10N_DEFAULTS[ key ];
		}
	}

	/**
	 * 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;
	};

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

		// require the API stuff at runtime
		// TODO: check if it's called everytime and eventually put dependency in ResourceLoader
		// this returns the Promise created downstream (false or existing page)
		return mw.loader.using( 'mediawiki.api' ).then( function() {

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

			// make the API request
			// resolve the parent Promise with another Promise giving the existing page or false
			return ( new mw.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;
			} );
		
		} );
	};

	/**
	 * 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 ) {
						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()

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

		// 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
		);
	};
	// 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
} );