User:Wctaiwan/rewritePathVariant.js

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/**
 * Work around https://phabricator.wikimedia.org/T223053 by rewriting link URLs
 *
 * Thanks to User:Legoktm for the idea and for technical assistance, and to
 * User:Jack Phoenix for reviewing the implementation.
 */

(function ($, mw) {
'use strict';

// Matches /zh-*/Foo and the variant query parameter in the current URL
var matchedPath = window.location.pathname.match(/^\/(zh-(?:cn|hk|mo|my|sg|tw))\//)
	|| window.location.search.match(/[&?]variant=(zh-(?:cn|hk|mo|my|sg|tw))/);

if (matchedPath == null) {
	return; // Path doesn't start with /zh-*/ or have a variant query paramter
}

var variant = matchedPath[1];

// Rewrite /wiki/Foo links to /zh-*/Foo
// touchstart is needed to handle "Open in Background" in Safari on iOS
$(document).on('click contextmenu touchstart', 'a[href^="/wiki/"]', function() {
	$(this).attr('href', function (_, originalPath) {
		return originalPath.replace(/^\/wiki\//, '/' + variant + '/');
	});
});

// Append &variant=zh-* to /zhwiki/w/index.php links
$(document).on('click contextmenu touchstart', 'a[href^="/zhwiki/w/index.php?"]', function() {
	$(this).attr('href', function (_, originalPath) {
		if (originalPath.indexOf('variant=') !== -1) {
			return originalPath; // Already has variant query parameter
		}
		return originalPath + '&variant=' + variant;
	});
});

})(jQuery, mediaWiki);