MediaWiki:Gadget-directLinkToCommons.js

/**
 * Direct imagelinks to Commons
 *
 * Required modules: mediawiki.util
 *
 * @source https://www.mediawiki.org/wiki/Snippets/Direct_imagelinks_to_Commons
 * @author Krinkle
 * @version 2015-08-01
 */
if ( mw.config.get( 'wgNamespaceNumber', 0 ) >= 0 ) {
	mw.loader.using( [ 'mediawiki.util' ] ).done( function () {
		mw.hook( 'wikipage.content' ).add( function ( $content ) {
			var
				uploadBaseRe = /^\/\/upload\.wikimedia\.org\/wikipedia\/commons/,

                localFileNSString = mw.config.get( 'wgFormattedNamespaces' )['6'] + ':',
				localBasePath = new RegExp(
					'^' + mw.util.escapeRegExp( mw.util.getUrl( localFileNSString ) )
				),
				localBaseScript = new RegExp(
					'^' + mw.util.escapeRegExp(
                        mw.util.wikiScript() + '?title=' + mw.util.wikiUrlencode( localFileNSString )
                    )
                ),

				commonsBasePath = '//commons.wikimedia.org/wiki/File:',
				commonsBaseScript = '//commons.wikimedia.org/w/index.php?title=File:';

			$content.find( 'a.image, a.mw-file-description' ).attr( 'href', function ( i, currVal ) {
				if ( uploadBaseRe.test( $( this ).find( 'img' ).attr( 'src' ) ) ) {
					return currVal
						.replace( localBasePath, commonsBasePath )
						.replace( localBaseScript, commonsBaseScript );
				}
			} );
		} );
	} );
}