User:Ricordisamoa/AlreadySection.js

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/* <nowiki>
 * Warns users trying to create a new section with an already-used title
 * @author [[User:Ricordisamoa]]
*/
$( function () {
	if ( mw.config.get( 'wgAction' ) !== 'edit' || mw.util.getParamValue( 'section' ) !== 'new' ) {
		return;
	}
	mw.loader.using( 'jquery.tipsy', function () {
		new mw.Api().get( {
			action: 'query',
			format: 'json',
			formatversion: 2,
			titles: mw.config.get( 'wgPageName' ),
			prop: 'revisions',
			rvlimit: 1,
			rvprop: 'content'
		} )
		.done( function ( d ) {
			d = d.query.pages;
			if ( d === undefined || d.length !== 1 ) {
				return;
			}
			d = d[0];
			if ( d.revisions === undefined || d.revisions.length !== 1 ) {
				return;
			}
			d = d.revisions[0].content;
			if ( d === undefined ) {
				return;
			}
			var i18n = {
				en: 'The section title you entered already $1is on the page$2. Would you like to change it?',
				it: 'Il titolo di sezione che hai inserito $1esiste già nella pagina$2. Vorresti cambiarlo?'
			};
			mw.messages.set( 'AlreadySection', i18n[mw.config.get( 'wgUserLanguage' )] || i18n.en );
			var encodeSection = function ( title ) {
				return mw.util.wikiUrlencode( title.replace( /\[\[(.+\|)?(.+)\]\]/g, '$2' ) ).replace( /\%/g, '.' ).replace( /\//g, '.2F' );
			};
			var sections = $.map(
				d.match( /(^|\n)\=+\s*[^\n]*\S+[^\n]*\s*\=+(\n|$)/g ),
				function ( e ) {
					return encodeSection( e.trim().replace( /^\=+|\=+$/g, '' ).trim() );
				}
			);
			if ( sections.length === 0 ) {
				return;
			}
			$( '#wpSummary' ).on( 'input', function () {
				if ( sections.indexOf( encodeSection( this.value ) ) !== -1 ) {
					var href = mw.util.getUrl( mw.config.get( 'wgPageName' ) ) + '#' + encodeSection( this.value );
					$( this ).attr( {
						title: mw.message( 'AlreadySection', '<a href="' + href + '">', '</a>' ).text()
					} ).tipsy( {
						title: 'title',
						html: true,
						gravity: 'w',
						fade: true,
						trigger: 'manual'
					} ).tipsy( 'show' );
				} else {
					try {
						$( this ).tipsy( 'hide' );
					} catch ( e ) {
					}
				}
			} );
		} );
	} );
} );