User:魔琴/gadgets/flip-lang/index.js

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$(document).keydown(function (e) {
    mw.loader.using(['mediawiki.util'], function () {
        if (mw.config.get('wgAction') === 'edit') {
            return;
        }
        if (e.ctrlKey && e.altKey && e.shiftKey && e.code === 'KeyI') {
            var lang = prompt('Language code').trim().toLowerCase();
            const ns = mw.config.get('wgNamespaceNumber');
            var pagename = mw.config.get('wgPageName');
            if (ns === -1) {
				if (lang === "mos") {
                    lang = "fr:mos"; // same as above
                }
                const specialPageName = mw.config.get('wgCanonicalSpecialPageName');
                const url = new URL(window.location);
                var newTitle = lang + ":Special:" + specialPageName;
                if (url.pathname.endsWith('index.php')) {
                    url.searchParams.set('title', newTitle);
                } else {
                    const parts = url.pathname.split('/');
                    parts[2] = encodeURIComponent(newTitle);
                    url.pathname = parts.join('/');
                } 
                window.open(url.toString());
            } else if ((ns === 2 || ns === 3 )&& !/\//.test(pagename)) {
                canonicalUserPrefix = ns===2 ? ':User:' : ':User talk:';
                if (lang === "mos") {
                    lang = "fr:mos"; // I hope frwiki won't come up with a mos: pseudo-namespace
                }
                var newPath = lang + canonicalUserPrefix + mw.config.get('wgRelevantUserName');
                window.open('/wiki/' + newPath);
            } else {
                normal = normalizeLang(lang);
                useSkin = mw.config.get('skin');
                var langSection = getLangSection(useSkin);
                iwSelect = langSection + ' .interwiki-' + normal + ' a';
                target = $(iwSelect).attr('href');
                if (target === undefined) {
                    if (normal !== lang) {
                        lang = '"' + normal + '" (' + lang + ')';
                    } else {
						lang = '"' + lang + '"';
					}
                    mw.notify('Fail to find the page in ' + lang + '.',{type:"error"});
                    if ($(langSection).length === 0 && useSkin === "vector-2022") {
                        mw.notify('Vector 2022 users should install 魔琴\'s legacy language bar gadget.',{type:"error"});
                    }
					return;
                }
                window.open($(iwSelect).attr('href'));
            }
        }

        function normalizeLang (code) {
            const langMap = {
                'gsw': 'als',
                'sgs': 'bat-smg',
                'vro': 'fiu-vro',
                'nrf': 'nrm',
                'rup': 'roa-rup',
                'en-simple': 'simple',
                'lzh': 'zh-classical',
                'nan': 'zh-min-nan',
                'yue': 'zh-yue',
                'mo':  'ro',
                'be-x-old': 'be-tarask',
				'nb':  'no'
            };
            const key = (code || '').trim().toLowerCase();
            return langMap[key] || key;
        }
        
        function getLangSection (skin) {
            const elementMap = {
                'vector': '#p-lang',
                'vector-2022': '#legacy-lang-menu-container', // [[User:魔琴/gadgets/legacy-2022#经典语言栏]]
                'timeless': '#p-lang',
                'monoboook': '#p-lang',
                'modern': '#p-lang',
                'cologneblue': '#langlinks',
                'minerva': '#p-lang',
                '': '#p-lang'
            };
            const key = (skin || '');
            return elementMap[key] || key;
        }
    })
});