control-deezer-webplayer.js

// ==UserScript==
// @name         DeezerCLI
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Control Deezer web player from the console
// @author       pyarnau@gmail.com
// @match        http://www.deezer.com/*
// @grant        none
// ==/UserScript==

// = Setup
//
// - Server:
//   $ nc -k -l 9123 | wscat -l 9124
//
// - Send command ("toggle-play" | "next" | "prev"):
//   $ echo '{"type": "deezer", "command": COMMAND}' | nc localhost 9123

(function() {
    'use strict';

    function init(url) {
        var ws = new WebSocket(url);

        ws.onclose = function (event) {
            setTimeout(function() { init(url); }, 1000);
        };

        ws.onmessage = function (event) {
            var command = JSON.parse(event.data);

            switch (command.type) {
                case "alert":
                    alert(command.message);
                    break;
                case "deezer":
                    switch (command.command) {
                        case "toggle-play":
                            jQuery(".control-play").click();
                            break;
                        case "prev":
                            jQuery(".control-prev").click();
                            break;
                        case "next":
                            jQuery(".control-next").click();
                            break;
                    }
            }
        };
    }

    init("ws://localhost:9124");
})();