JDownloader2 EventScript - Link Crawler Rules Installer

/**
 * JDownloader2 EventScript - Link Crawler Rules Installer
 *
 * Paste script to the script edittor in JD2, and press "Test Run" button.
 * After installation, You can delete this script in JD2 event script settings.
 *
 * Sample:
 *
 * REWRITE  frdl.to --> frdl.io
 *
 */
(function()
{
    // Define new "Link Crawled Rules" (install data)
    const install_rules =
    [
        {
            "name"               : "frdl.to Domain replace",
            "pattern"            : "https://frdl\\.to/(.+)",
            "rewriteReplaceWith" : "https://frdl.io/$1",
            "rule"               : "REWRITE",
            "enabled"            : true,
        },
    ];


    // process start...

    if (!showConfirmDialog("Install new Link Crawler Rules ?\n\nLinkCrawlerRules=\n"+JSON.stringify(install_rules,null,2), "Install","Cancel"))
        return;

    const interface = "jd.controlling.linkcrawler.LinkCrawlerConfig";
    const storage = null;
    var key = "LinkCrawlerRules";

    // load rules
    const linkcrawler_rules = callAPI(
        "config", "get",
        interface,
        storage,
        key
    );

    if (!linkcrawler_rules || !Array.isArray(linkcrawler_rules))
    {
        alert("ERROR: JD2 returned the invalid data as LinkCrawlerRules.");
        return;
    }
    var install_f = 0;
    //merge without the same name rule
    install_rules.forEach(function(i_r)
    {
        if (! linkcrawler_rules.some(function(r){if (i_r.name==r.name)return true}))
        {
            linkcrawler_rules.push(i_r);
            install_f++;
        }
    });

    if (!install_f)
    {
        alert("ERROR: These rules have been already installed.");
        return;
    }

    // restore rules
    callAPI(
        "config", "set",
        interface,
        storage,
        key,
        linkcrawler_rules
    );

    // check enable/disable Link Crawled Rules
    key = "LinkCrawlerRulesEnabled";
    if (callAPI(
        "config", "get",
        interface,
        storage,
        key
    ))
        return;

    // ask enable/disable Link Crawled Rules, and enable it
    if (showConfirmDialog("Enable Link Crawler Rules ?", "Yes","No"))
        callAPI(
            "config", "set",
            interface,
            storage,
            key,
            true
        );

})();