Enhances magic links in SE comments to make them more useful

magicLinkEnhancer.user.js

// ==UserScript==
// @name         Magic Links Enhancer
// @namespace    stackexchange.com/users/4337810/
// @version      1.0.1
// @description  Enhances magic links in SE comments to make them more useful
// @author       ᔕᖺᘎᕊ (stackexchange.com/users/4337810/)
// @match        *://*.stackoverflow.com/questions/*
// @match        *://*.stackexchange.com/questions/*
// @match        *://*.superuser.com/questions/*
// @match        *://*.serverfault.com/questions/*
// @match        *://*.askubuntu.com/questions/*
// @match        *://*.stackapps.com/questions/*
// @match        *://*.mathoverflow.net/questions/*
// @grant        none
// ==/UserScript==
var urls = {
    "so": ["stackoverflow.com", "Stack Overflow"],
    "su": ["superuser.com", "Super User"],
    "sf": ["serverfault.com", "Server Fault"],
    "stackoverflow": ["stackoverflow.com", "Stack Overflow"],
    "superuser": ["superuser.com", "Super User"],
    "serverfault": ["serverfault.com", "Server Fault"],
    "stackapps": ["stackapps.com", "Stack Apps"],
    "meta": ["meta.stackexchange.com", "Meta Stack Exchange"],
    "webapps": ["webapps.stackexchange.com", "Web Applications Stack Exchange"],
    "gaming": ["gaming.stackexchange.com", "Arqade Stack Exchange"],
    "webmasters": ["webmasters.stackexchange.com", "Webmasters Stack Exchange"],
    "cooking": ["cooking.stackexchange.com", "Seasoned Advice Stack Exchange"],
    "gamedev": ["gamedev.stackexchange.com", "Game Development Stack Exchange"],
    "photo": ["photo.stackexchange.com", "Photography Stack Exchange"],
    "stats": ["stats.stackexchange.com", "Cross Validated Stack Exchange"],
    "math": ["math.stackexchange.com", "Mathematics Stack Exchange"],
    "diy": ["diy.stackexchange.com", "Home Improvement Stack Exchange"],
    "gis": ["gis.stackexchange.com", "Geographic Information Systems Stack Exchange"],
    "tex": ["tex.stackexchange.com", "TeX - LaTeX Stack Exchange"],
    "askubuntu": ["askubuntu.com", "Ask Ubuntu Stack Exchange"],
    "money": ["money.stackexchange.com", "Personal Finance & Money Stack Exchange"],
    "english": ["english.stackexchange.com", "English Language & Usage Stack Exchange"],
    "ux": ["ux.stackexchange.com", "User Experienc Stack Exchangee"],
    "unix": ["unix.stackexchange.com", "Unix & Linux Stack Exchange"],
    "wordpress": ["wordpress.stackexchange.com", "WordPress Development Stack Exchange"],
    "cstheory": ["cstheory.stackexchange.com", "Theoretical Computer Science Stack Exchange"],
    "apple": ["apple.stackexchange.com", "Ask Different Stack Exchange"],
    "rpg": ["rpg.stackexchange.com", "Role-playing Games Stack Exchange"],
    "bicycles": ["bicycles.stackexchange.com", "Bicycles Stack Exchange"],
    "programmers": ["programmers.stackexchange.com", "Programmers Stack Exchange"],
    "electronics": ["electronics.stackexchange.com", "Electrical Engineering Stack Exchange"],
    "android": ["android.stackexchange.com", "Android Enthusiasts Stack Exchange"],
    "boardgames": ["boardgames.stackexchange.com", "Board & Card Games Stack Exchange"],
    "physics": ["physics.stackexchange.com", "Physics Stack Exchange"],
    "homebrew": ["homebrew.stackexchange.com", "Homebrewing Stack Exchange"],
    "security": ["security.stackexchange.com", "Information Security Stack Exchange"],
    "writers": ["writers.stackexchange.com", "Writers Stack Exchange"],
    "video": ["video.stackexchange.com", "Video Production Stack Exchange"],
    "graphicdesign": ["graphicdesign.stackexchange.com", "Graphic Design Stack Exchange"],
    "dba": ["dba.stackexchange.com", "Database Administrators Stack Exchange"],
    "scifi": ["scifi.stackexchange.com", "Science Fiction & Fantasy Stack Exchange"],
    "codereview": ["codereview.stackexchange.com", "Code Review Stack Exchange"],
    "codegolf": ["codegolf.stackexchange.com", "Programming Puzzles & Code Golf Stack Exchange"],
    "quant": ["quant.stackexchange.com", "Quantitative Finance Stack Exchange"],
    "pm": ["pm.stackexchange.com", "Project Management Stack Exchange"],
    "skeptics": ["skeptics.stackexchange.com", "Skeptics Stack Exchange"],
    "fitness": ["fitness.stackexchange.com", "Physical Fitness Stack Exchange"],
    "drupal": ["drupal.stackexchange.com", "Drupal Answers Stack Exchange"],
    "mechanics": ["mechanics.stackexchange.com", "Motor Vehicle Maintenance & Repair Stack Exchange"],
    "parenting": ["parenting.stackexchange.com", "Parenting Stack Exchange"],
    "sharepoint": ["sharepoint.stackexchange.com", "SharePoint Stack Exchange"],
    "music": ["music.stackexchange.com", "Music: Practice & Theory Stack Exchange"],
    "sqa": ["sqa.stackexchange.com", "Software Quality Assurance & Testing Stack Exchange"],
    "judaism": ["judaism.stackexchange.com", "Mi Yodeya Stack Exchange"],
    "german": ["german.stackexchange.com", "German Language Stack Exchange"],
    "japanese": ["japanese.stackexchange.com", "Japanese Language Stack Exchange"],
    "philosophy": ["philosophy.stackexchange.com", "Philosophy Stack Exchange"],
    "gardening": ["gardening.stackexchange.com", "Gardening & Landscaping Stack Exchange"],
    "travel": ["travel.stackexchange.com", "Travel Stack Exchange"],
    "productivity": ["productivity.stackexchange.com", "Personal Productivity Stack Exchange"],
    "crypto": ["crypto.stackexchange.com", "Cryptography Stack Exchange"],
    "dsp": ["dsp.stackexchange.com", "Signal Processing Stack Exchange"],
    "french": ["french.stackexchange.com", "French Language Stack Exchange"],
    "christianity": ["christianity.stackexchange.com", "Christianity Stack Exchange"],
    "bitcoin": ["bitcoin.stackexchange.com", "Bitcoin Stack Exchange"],
    "linguistics": ["linguistics.stackexchange.com", "Linguistics Stack Exchange"],
    "hermeneutics": ["hermeneutics.stackexchange.com", "Biblical Hermeneutics Stack Exchange"],
    "history": ["history.stackexchange.com", "History Stack Exchange"],
    "bricks": ["bricks.stackexchange.com", "LEGO® Answers Stack Exchange"],
    "spanish": ["spanish.stackexchange.com", "Spanish Language Stack Exchange"],
    "scicomp": ["scicomp.stackexchange.com", "Computational Scienc Stack Exchangee"],
    "movies": ["movies.stackexchange.com", "Movies & TV Stack Exchange"],
    "chinese": ["chinese.stackexchange.com", "Chinese Language Stack Exchange"],
    "biology": ["biology.stackexchange.com", "Biology Stack Exchange"],
    "poker": ["poker.stackexchange.com", "Poker Stack Exchange"],
    "mathematica": ["mathematica.stackexchange.com", "Mathematica Stack Exchange"],
    "cogsci": ["cogsci.stackexchange.com", "Cognitive Sciences Stack Exchange"],
    "outdoors": ["outdoors.stackexchange.com", "The Great Outdoors Stack Exchange"],
    "martialarts": ["martialarts.stackexchange.com", "Martial Arts Stack Exchange"],
    "sports": ["sports.stackexchange.com", "Sports Stack Exchange"],
    "academia": ["academia.stackexchange.com", "Academia Stack Exchange"],
    "cs": ["cs.stackexchange.com", "Computer Science Stack Exchange"],
    "workplace": ["workplace.stackexchange.com", "The Workplace Stack Exchange"],
    "windowsphone": ["windowsphone.stackexchange.com", "Windows Phone Stack Exchange"],
    "chemistry": ["chemistry.stackexchange.com", "Chemistry Stack Exchange"],
    "chess": ["chess.stackexchange.com", "Chess Stack Exchange"],
    "raspberrypi": ["raspberrypi.stackexchange.com", "Raspberry Pi Stack Exchange"],
    "russian": ["russian.stackexchange.com", "Russian Language Stack Exchange"],
    "islam": ["islam.stackexchange.com", "Islam Stack Exchange"],
    "salesforce": ["salesforce.stackexchange.com", "Salesforce Stack Exchange"],
    "patents": ["patents.stackexchange.com", "Ask Patents Stack Exchange"],
    "genealogy": ["genealogy.stackexchange.com", "Genealogy & Family History Stack Exchange"],
    "robotics": ["robotics.stackexchange.com", "Robotics Stack Exchange"],
    "expressionengine": ["expressionengine.stackexchange.com", "ExpressionEngine® Answers Stack Exchange"],
    "politics": ["politics.stackexchange.com", "Politics Stack Exchange"],
    "anime": ["anime.stackexchange.com", "Anime & Manga Stack Exchange"],
    "magento": ["magento.stackexchange.com", "Magento Stack Exchange"],
    "ell": ["ell.stackexchange.com", "English Language Learners Stack Exchange"],
    "sustainability": ["sustainability.stackexchange.com", "Sustainable Living Stack Exchange"],
    "tridion": ["tridion.stackexchange.com", "Tridion Stack Exchange"],
    "reverseengineering": ["reverseengineering.stackexchange.com", "Reverse Engineering Stack Exchange"],
    "networkengineering": ["networkengineering.stackexchange.com", "Network Engineering Stack Exchange"],
    "opendata": ["opendata.stackexchange.com", "Open Data Stack Exchange"],
    "freelancing": ["freelancing.stackexchange.com", "Freelancing Stack Exchange"],
    "blender": ["blender.stackexchange.com", "Blender Stack Exchange"],
    "mathoverflow.net": ["mathoverflow.net", "MathOverflow"],
    "space": ["space.stackexchange.com", "Space Exploration Stack Exchange"],
    "sound": ["sound.stackexchange.com", "Sound Design Stack Exchange"],
    "astronomy": ["astronomy.stackexchange.com", "Astronomy Stack Exchange"],
    "tor": ["tor.stackexchange.com", "Tor Stack Exchange"],
    "pets": ["pets.stackexchange.com", "Pets Stack Exchange"],
    "ham": ["ham.stackexchange.com", "Amateur Radio Stack Exchange"],
    "italian": ["italian.stackexchange.com", "Italian Language Stack Exchange"],
    "pt.stackoverflow": ["pt.stackoverflow.com", "Stack Overflow em Português"],
    "aviation": ["aviation.stackexchange.com", "Aviation Stack Exchange"],
    "ebooks": ["ebooks.stackexchange.com", "Ebooks Stack Exchange"],
    "beer": ["beer.stackexchange.com", "Beer Stack Exchange"],
    "softwarerecs": ["softwarerecs.stackexchange.com", "Software Recommendations Stack Exchange"],
    "arduino": ["arduino.stackexchange.com", "Arduino Stack Exchange"],
    "cs50": ["cs50.stackexchange.com", "CS50 Stack Exchange"],
    "expatriates": ["expatriates.stackexchange.com", "Expatriates Stack Exchange"],
    "matheducators": ["matheducators.stackexchange.com", "Mathematics Educators Stack Exchange"],
    "earthscience": ["earthscience.stackexchange.com", "Earth Science Stack Exchange"],
    "joomla": ["joomla.stackexchange.com", "Joomla Stack Exchange"],
    "datascience": ["datascience.stackexchange.com", "Data Science Stack Exchange"],
    "puzzling": ["puzzling.stackexchange.com", "Puzzling Stack Exchange"],
    "craftcms": ["craftcms.stackexchange.com", "Craft CMS Stack Exchange"],
    "buddhism": ["buddhism.stackexchange.com", "Buddhism Stack Exchange"],
    "hinduism": ["hinduism.stackexchange.com", "Hinduism Stack Exchange"],
    "communitybuilding": ["communitybuilding.stackexchange.com", "Community Building Stack Exchange"],
    "startups": ["startups.stackexchange.com", "Startups Stack Exchange"],
    "worldbuilding": ["worldbuilding.stackexchange.com", "Worldbuilding Stack Exchange"],
    "ja.stackoverflow": ["ja.stackoverflow.com", "スタック・オーバーフロー"],
    "emacs": ["emacs.stackexchange.com", "Emacs Stack Exchange"],
    "hsm": ["hsm.stackexchange.com", "History of Science and Mathematics Stack Exchange"],
    "economics": ["economics.stackexchange.com", "Economics Stack Exchange"],
    "lifehacks": ["lifehacks.stackexchange.com", "Lifehacks Stack Exchange"],
    "engineering": ["engineering.stackexchange.com", "Engineering Stack Exchange"],
    "coffee": ["coffee.stackexchange.com", "Coffee Stack Exchange"],
    "vi": ["vi.stackexchange.com", "Vi and Vim Stack Exchange"],
    "musicfans": ["musicfans.stackexchange.com", "Music Fans Stack Exchange"],
    "woodworking": ["woodworking.stackexchange.com", "Woodworking Stack Exchange"],
    "civicrm": ["civicrm.stackexchange.com", "CiviCRM Stack Exchange"],
    "health": ["health.stackexchange.com", "Health Stack Exchange"],
    "ru.stackoverflow": ["ru.stackoverflow.com", "Stack Overflow на русском"],
    "rus": ["rus.stackexchange.com", "Русский язык Stack Exchange"],
    "mythology": ["mythology.stackexchange.com", "Mythology Stack Exchange"],
    "law": ["law.stackexchange.com", "Law Stack Exchange"],
    "opensource": ["opensource.stackexchange.com", "Open Source Stack Exchange"],
    "elementaryos": ["elementaryos.stackexchange.com", "elementary OS Stack Exchange"],
    "portuguese": ["portuguese.stackexchange.com", "Portuguese Language Stack Exchange"],
    "computergraphics": ["computergraphics.stackexchange.com", "Computer Graphics Stack Exchange"],
    "hardwarerecs": ["hardwarerecs.stackexchange.com", "Hardware Recommendations Stack Exchange"],
    "es.stackoverflow": ["es.stackoverflow.com", "Stack Overflow en español Stack Exchange"],
    "docs-beta": ["docs-beta.stackexchange.com", "Documentation Beta Stack Exchange"],
    "3dprinting": ["3dprinting.stackexchange.com", "3D Printing Stack Exchange"],
    "ethereum": ["ethereum.stackexchange.com", "Ethereum Stack Exchange"],
    "latin": ["latin.stackexchange.com", "Latin Language Stack Exchange"],
    "languagelearning": ["languagelearning.stackexchange.com", "Language Learning Stack Exchange"]
};

var privs = {
    "site-analytics": "access to site analytics",
    "trusted-user": "trusted user",
    "protect-questions": "protect questions",
    "moderator-tools": "access to moderator tools",
    "approve-tag-wiki-edits": "approve tag wiki edits",
    "close-questions": "cast close and reopen votes",
    "suggest-tag-synonyms": "create tag synonyms",
    "edit": "edit questions and answers",
    "access-review-queues": "access review queues",
    "established-user": "established user",
    "gallery-chat-rooms": "create gallery chat rooms",
    "create-tags": "create tags",
    "view-close-votes": "view close votes",
    "reduced-ads": "reduce ads",
    "vote-down": "vote down",
    "edit-community-wiki": "edit community wiki",
    "chat-rooms": "create chat rooms",
    "set-bounties": "set bounties",
    "chat": "talk in chat",
    "flag-posts": "flag posts",
    "vote-up": "vote up",
    "new-user": "remove new user restrictions",
    "community-wiki": "create wiki posts",
    "comment": "comment everywhere",
    "participate-in-meta": "participate in meta",
    "create-posts": "create posts"
};

function siteUrl(site) {
    if (site.indexOf('meta.') > -1 && site.indexOf('meta.stackexchange.com') == -1) {
        return [
            '//meta.' + urls[site.split('.')[1]][0],
            'Meta ' + urls[site.split('.')[1]][1]
        ];
    } else {
        return [
            '//' + urls[site][0],
            urls[site][1]
        ];
    }
}

function markdownify(text, url) {
    return '[' + text + '](' + url + ')';
}

function api(url) {
    var x;
    $.ajax({
        url: url,
        type: 'get',
        async: false,
        success: function(d) {
            x = d;
        }
    });
    return x;
}

function convertMagicLinks(val) {
    var split = val.replace(/\[/g, '').replace(/\]/g, '').split(':');
    if (split.length == 3 || split.length == 2) {
        var site = (split.length == 3 ? siteUrl(split[0])[0] : location.protocol + '//' + location.hostname),
            type = (split.length == 3 ? split[1] : split[0]),
            anchorId = (split.length == 3 ? split[2] : split[1]),
            apiSite = site.replace(/(h?t?t?p?s?:?\/?\/?)/, '');

        if (type == 'user') {
            x = api("http://api.stackexchange.com/2.2/users/" + anchorId + "?site=" + apiSite);
            return markdownify(x.items[0].display_name, x.items[0].link);
        } else if (type == 'post') {
            x = api("http://api.stackexchange.com/2.2/posts/" + anchorId + "?site=" + apiSite + "&filter=!9YdnSEBb8");
            return markdownify(x.items[0].title, x.items[0].link);
        } else if (type == 'help') {
            return markdownify('Help Center', site + '/help/' + anchorId);
        } else if (type == 'priv') {
            return markdownify(privs[anchorId], site + '/help/privileges/' + anchorId);
        }  else {
            return val;
        }
    } else if (split.length == 1) {
        var anchorId = split[0];
        if ($.isNumeric(anchorId)) {
            x = api("http://api.stackexchange.com/2.2/posts/" + anchorId + "?site=" + location.hostname + "&filter=!9YdnSEBb8");
            return markdownify(x.items[0].title, x.items[0].link);
        } else {
            return markdownify(siteUrl(anchorId)[1], siteUrl(anchorId)[0]);
        }
    }
}

function replaceMagicLinks($el) {
    var val = $el.val();
    val = val.replace(/(\[.*?\])/g, function(a, b, c) {
        console.log(convertMagicLinks(b));
        return convertMagicLinks(b);
    });
    $el.val(val);
}

//Handlers:
$(document).on('keydown', '.comment-form textarea', function (e) {
    if (e.keyCode == 13) {
        replaceMagicLinks($(this));
    }
});
$(document).on('click', '.comment-form input[type="submit"]', function () {
    replaceMagicLinks($(this).parent().prev().find('textarea'));
});