A userscript that lets you make custom magic links to use in the comments on SE sites

SE-Custom-Magic-Links.user.js

// ==UserScript==
// @name         Custom Magic Links
// @namespace    http://stackexchange.com/users/4337810/
// @version      1.0
// @description  A userscript that lets you make custom magic links to use in the comments on SE sites
// @author       ᔕᖺᘎᕊ (http://stackexchange.com/users/4337810/)
// @match        *://*.stackexchange.com/*
// @match        *://*.stackoverflow.com/*
// @match        *://*.superuser.com/*
// @match        *://*.serverfault.com/*
// @match        *://*.askubuntu.com/*
// @match        *://*.stackapps.com/*
// @match        *://*.mathoverflow.net/*
// @grant        none
// ==/UserScript==
var magicLinks = {};
var magicLinksCustomText = {};

magicLinks['edit/q Edit Question'] = '$BASEURL$/posts/$QUESTIONID$/edit';
magicLinks['edit/a Edit Answer'] = '$BASEURL$/posts/$ANSWERID$/edit';
magicLinksCustomText['test'] = "This is a test";
magicLinksCustomText['test2'] = "This is a test2";


//-----------------------------------------------------------------------------------------------------------------//

function magicLink($el) {
    var $textarea = ($el.is('textarea') ? $el : $el.parent().parent().find('textarea'));
    var newVal = $textarea.val();
    $.each(magicLinks, function (k, v) {
        var linkText = k.split(' ').slice(1).join(' ');
        var regex = new RegExp("\\[" + k.split(' ')[0] + "\\]", 'g');
        var url = replacePlaceholders(v, $textarea);
        newVal = newVal.replace(regex, "[" + linkText + "](" + url + ")");
    });
    $.each(magicLinksCustomText, function (k, v) {
        var regex = new RegExp("(\\[.*?\\])\\[" + k + "\\]", "g")
        var url = replacePlaceholders(v, $textarea);
        newVal = newVal.replace(regex, "$1(" + url + ")"); //replacing newVal this time because the latest version is newVal.
    });
    $textarea.val(newVal);
}

function replacePlaceholders(s, $textarea) {
    var baseUrl = $(location).attr('protocol') + '//' + $(location).attr('hostname');
    var localMetaBase = $(location).attr('protocol') + '//meta.' + $(location).attr('hostname');
    var questionId = $('.question').data('questionid');
    var answerId = $textarea.closest('.answer').data('answerid');

    return s.replace(/\$BASEURL\$/ig, baseUrl).replace(/\$METABASEURL\$/ig, localMetaBase).replace(/\$QUESTIONID\$/ig, questionId).replace(/\$ANSWERID\$/ig, answerId);
}

function checkAndCall(e, $el) { //mini function to call magicLink after pressing enter (avoid repetition)
    if (e.keyCode == 13) {
        magicLink($el);
    }
}

//Handlers:
$('.comment-form').on('keydown', 'textarea', function (e) {
    checkAndCall(e, $(this));
});
$('.comment-form').on('click', 'input[type="submit"]', function () {
    magicLink($(this));
});

//sets handler again after clicking edit - there's probably a better way to do it though!
$('.comments').on('click', '.comment-edit', function () {
    setTimeout(function () {
        $('.comment-form').on('keydown', 'textarea', function (e) {
            checkAndCall(e, $(this));
        });
    }, 500);
});
$('.comments').on('click', '.comment-edit', function () {
    setTimeout(function () {
        $('.comment-form').on('click', 'input[type="submit"]', function () {
            magicLink($(this));
        });
    }, 500);
});