User:Former User aDB0haVymg/Gadgets/editclassic.js

/**
 * editclassic.js
 * 
 * ----
 * 
 * A MediaWiki Gadget to enable editing via the classic wikitext editor,
 * even when VisualEditor & 2017 Wikitext Editor is fully enabled.
 * 
 * ----
 * 
 * @author      User:Classy Melissa on zh.wikipedia.org
 * @version     8
 * @license     Public Domain
 * 
 */
/* global mw */

// wrap in anonymous function to prevent scope leak
(function() {

    /**
     * The starting point.
     * @param {string} key  Pre-defined ignition key
     */
    function ignite(key) {
    
        if (key != "851a869c-3811-4d49-9c8d-0e567317579c") {
            throw new Error("Invalid ignition key");
        }
    
        // find the node to copy
        const oldLiNode = document.querySelector("li#ca-edit");
    
        // cannot proceed if this doesn't exist, or doesn't have a link inside
        if (checkPageEligibility(oldLiNode) === false) {
            // maybe it's not an existing article page. Just ignore.
            console.log("editclassic.js: Non-eligible page ignored.");
            return;
        }
    
        // clone the node & find the link within 
        const newLiNode = oldLiNode.cloneNode(true);
        const newLiLink = newLiNode.querySelector("a");
    
        // hotpatch v#3: if the old node is selected, de-select it.
        if (oldLiNode.classList.contains("selected")) {
            oldLiNode.classList.remove("selected");
        }
    
        // change or clear its relevant attributes
        newLiNode.id = "ca-edit-classic";
        applyNewLinkNodeStyles(newLiLink);
    
        // generate and insert the little 2010 badge
        const newLiBadge = generateBadge();
        newLiLink.insertAdjacentElement("beforeend", newLiBadge);
    
        // update link href
        newLiLink.href = getUpdatedHref(newLiLink.href);
    
        // insert newLiNode
        oldLiNode.insertAdjacentElement("afterend", newLiNode);
    
        // done.
    
    }

    /**
     * Generates the 2010 little blue badge
     */
    function generateBadge() {
    
        const newLiBadge = document.createElement("span");
    
        // various styles
        /* it's my intentional design to not use innerHTML
         * Because that's gross.
         */
        newLiBadge.innerText = "2010";
        newLiBadge.style.fontSize = "80%";
        newLiBadge.style.display = "inline";
        newLiBadge.style.border = "2px solid #A7BED3";
        newLiBadge.style.borderRadius = "3px";
        newLiBadge.style.padding = "0.1em 0.5em";
        newLiBadge.style.marginLeft = "0.5em";
        newLiBadge.style.verticalAlign = "top";
        newLiBadge.style.backgroundColor = "#CDF7F6";
    
        return newLiBadge;
    
    }
    
    function applyNewLinkNodeStyles(newLiLink) {
    
        newLiLink.accessKey = null;
        newLiLink.id = "ca-edit-classic-link";
        newLiLink.title = "Edit this page in classic wikitext editor";
        newLiLink.innerText = "Edit";
    
    }
    
    /**
     * Checks if the page is eligible for this little gadget.
     * @returns true or false
     */
    function checkPageEligibility(oldLiNode) {
    
        if (!(oldLiNode && oldLiNode.querySelector("a"))) {
            return false;
        } else {
            return true;
        }
    
    }
    
    /**
     * Gets an updated href target from an old target, for use with the new link.
     * replace "veaction" with "action" (if applicable) and 
     * "editsource" with "submit"  
     */
    function getUpdatedHref(oldHref) {
    
        var newHrefTarget = oldHref;
        newHrefTarget = newHrefTarget.replace(/(ve)?action/, "action");
        newHrefTarget = newHrefTarget.replace(/edit(source)?/, "submit");
    
        return newHrefTarget;
    
    }
    
    // launch the operation asynchronously 
    return new Promise(
        function(resolve, reject) {

            try {
                ignite("851a869c-3811-4d49-9c8d-0e567317579c");
                resolve();
            } catch(e) {
                mw.notify("editclassic.js error: " + e.toString());
                reject();
            }

        }
    )


})();