Module['websocket'] = { url: function(host, port, proto) {

    /* openttd.org hosts a WebSocket proxy for the content service. */

    if (host == "content.openttd.org" && port == 3978 && proto == "tcp") {

        return "wss://bananas-server.openttd.org/";

    }

    /* Everything else just tries to make a default WebSocket connection.

     * If you run your own server you can setup your own WebSocket proxy in

     * front of it and let people connect to your server via the proxy. You

     * are best to add another "if" statement as above for this. */

    if (location.protocol === 'https:') {

        /* Insecure WebSockets do not work over HTTPS, so we force

         * secure ones. */

        return 'wss://';

    } else {

        /* Use the default provided by Emscripten. */

        return null;

    }

} };

Module.preRun.push(function() {

    personal_dir = '/home/web_user/.openttd';

    content_download_dir = personal_dir + '/content_download'

    /* Because of the "-c" above, all user-data is stored in /user_data. */

    FS.mkdir(personal_dir);

    FS.mount(IDBFS, {}, personal_dir);

    Module.addRunDependency('syncfs');

    FS.syncfs(true, function (err) {

        /* FS.mkdir() tends to fail if parent folders do not exist. */

        if (!FS.analyzePath(content_download_dir).exists) {

            FS.mkdir(content_download_dir);

        }

        if (!FS.analyzePath(content_download_dir + '/baseset').exists) {

            FS.mkdir(content_download_dir + '/baseset');

        }

        /* Check if the OpenGFX baseset is already downloaded. */

        if (!FS.analyzePath(content_download_dir + '/baseset/opengfx-0.6.0.tar').exists) {

            window.openttd_downloaded_opengfx = true;

            FS.createPreloadedFile(content_download_dir + '/baseset', 'opengfx-0.6.0.tar', 'https://binaries.openttd.org/installer/emscripten/opengfx-0.6.0.tar', true, true);

        } else {

            /* Fake dependency increase, so the counter is stable. */

            Module.addRunDependency('opengfx');

            Module.removeRunDependency('opengfx');

        }

        Module.removeRunDependency('syncfs');

    });

    window.openttd_syncfs_shown_warning = false;

    window.openttd_syncfs = function() {

        /* Copy the virtual FS to the persistent storage. */

        FS.syncfs(false, function (err) { });

        /* On first time, warn the user about the volatile behaviour of

         * persistent storage. */

        if (!window.openttd_syncfs_shown_warning) {

            window.openttd_syncfs_shown_warning = true;

            Module.onWarningFs();

        }

    }

    window.openttd_exit = function() {

        Module.onExit();

    }

    window.openttd_abort = function() {

        Module.onAbort();

    }

    window.openttd_server_list = function() {

        add_server = Module.cwrap("em_openttd_add_server", null, ["string"]);

        /* Add servers that support WebSocket here. Examples:

         *  add_server("localhost");

         *  add_server("localhost:3979");

         *  add_server("127.0.0.1:3979");

         *  add_server("[::1]:3979");

         */

    }

    var leftButtonDown = false;

    document.addEventListener("mousedown", e => {

        if (e.button == 0) {

            leftButtonDown = true;

        }

    });

    document.addEventListener("mouseup", e => {

        if (e.button == 0) {

            leftButtonDown = false;

        }

    });

    window.openttd_open_url = function(url, url_len) {