fm-dx-webserver/web/js/3las/util/3las.websocketclient.js

/*
    WebSocket client is part of 3LAS (Low Latency Live Audio Streaming)
    https://github.com/JoJoBond/3LAS
*/
var WebSocketClient = /** @class */ (function () {
    function WebSocketClient(logger, uri, errorCallback, connectCallback, dataReadyCallback, disconnectCallback) {
        this.Logger = logger;
        this.Uri = uri;
        // Check callback argument
        if (typeof errorCallback !== 'function')
            throw new Error('WebSocketClient: ErrorCallback must be specified');
        if (typeof connectCallback !== 'function')
            throw new Error('WebSocketClient: ConnectCallback must be specified');
        if (typeof dataReadyCallback !== 'function')
            throw new Error('WebSocketClient: DataReadyCallback must be specified');
        if (typeof disconnectCallback !== 'function')
            throw new Error('WebSocketClient: DisconnectCallback must be specified');
        this.ErrorCallback = errorCallback;
        this.ConnectCallback = connectCallback;
        this.DataReadyCallback = dataReadyCallback;
        this.DisconnectCallback = disconnectCallback;
        // Client is not yet connected
        this.IsConnected = false;
        // Create socket, connect to URI
        if (typeof WebSocket !== "undefined")
            this.Socket = new WebSocket(this.Uri);
        else if (typeof webkitWebSocket !== "undefined")
            this.Socket = new webkitWebSocket(this.Uri);
        else if (typeof mozWebSocket !== "undefined")
            this.Socket = new mozWebSocket(this.Uri);
        else
            throw new Error('WebSocketClient: Browser does not support "WebSocket".');
        this.Socket.binaryType = 'arraybuffer';
        this.Socket.addEventListener("open", this.OnOpen.bind(this));
        this.Socket.addEventListener("error", this.OnError.bind(this));
        this.Socket.addEventListener("close", this.OnClose.bind(this));
        this.Socket.addEventListener("message", this.OnMessage.bind(this));
    }
    Object.defineProperty(WebSocketClient.prototype, "Connected", {
        get: function () {
            return this.IsConnected;
        },
        enumerable: false,
        configurable: true
    });
    WebSocketClient.prototype.Send = function (message) {
        if (!this.IsConnected)
            return;
        this.Socket.send(message);
    };
    // Handle errors
    WebSocketClient.prototype.OnError = function (_ev) {
        if (this.IsConnected == true)
            this.ErrorCallback("Socket fault.");
        else
            this.ErrorCallback("Could not connect to server.");
    };
    // Change connetion status once connected
    WebSocketClient.prototype.OnOpen = function (_ev) {
        if (this.Socket.readyState == 1) {
            this.IsConnected = true;
            this.ConnectCallback();
        }
    };
    // Change connetion status on disconnect
    WebSocketClient.prototype.OnClose = function (_ev) {
        if (this.IsConnected == true && (this.Socket.readyState == 2 || this.Socket.readyState == 3)) {
            this.IsConnected = false;
            this.DisconnectCallback();
        }
    };
    WebSocketClient.prototype.Close = function () {
        if (this.Socket) {
            this.Socket.close();
        }
    };
    // Handle incomping data
    WebSocketClient.prototype.OnMessage = function (ev) {
        // Trigger callback
        this.DataReadyCallback(ev.data);
    };
    return WebSocketClient;
}());