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223 lines
5.7 KiB
223 lines
5.7 KiB
define(["sugar-web/env"], function (env) {
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'use strict';
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var lastId = 0;
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var callbacks = {};
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var notificationCallbacks = {};
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var client = null;
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var inputStreams = [];
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function WebSocketClient(environment) {
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this.queue = [];
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this.socket = null;
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var that = this;
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env.getEnvironment(function (error, environment) {
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var port = environment.apiSocketPort;
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var socket = new WebSocket("ws://localhost:" + port);
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socket.binaryType = "arraybuffer";
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socket.onopen = function () {
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var params = [environment.activityId,
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environment.apiSocketKey];
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socket.send(JSON.stringify({
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"method": "authenticate",
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"id": "authenticate",
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"params": params
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}));
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while (that.queue.length > 0) {
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socket.send(that.queue.shift());
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}
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};
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socket.onmessage = function (message) {
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that.onMessage(message);
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};
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that.socket = socket;
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});
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}
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WebSocketClient.prototype.send = function (data) {
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if (this.socket && this.socket.readyState == WebSocket.OPEN) {
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this.socket.send(data);
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} else {
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this.queue.push(data);
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}
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};
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WebSocketClient.prototype.close = function () {
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this.socket.close();
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};
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var bus = {};
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function InputStream() {
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this.streamId = null;
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this.readCallback = null;
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}
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InputStream.prototype.open = function (callback) {
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var that = this;
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bus.sendMessage("open_stream", [], function (error, result) {
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that.streamId = result[0];
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inputStreams[that.streamId] = that;
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callback(error);
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});
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};
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InputStream.prototype.read = function (count, callback) {
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if (this.readCallback) {
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throw new Error("Read already in progress");
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}
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this.readCallback = callback;
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var buffer = new ArrayBuffer(8);
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var headerView = new Uint8Array(buffer, 0, 1);
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headerView[0] = this.streamId;
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var bodyView = new Uint32Array(buffer, 4, 1);
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bodyView[0] = count;
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bus.sendBinary(buffer);
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};
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InputStream.prototype.gotData = function (buffer) {
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var callback = this.readCallback;
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this.readCallback = null;
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callback(null, buffer);
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};
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InputStream.prototype.close = function (callback) {
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var that = this;
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function onStreamClosed(error, result) {
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if (callback) {
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callback(error);
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}
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delete inputStreams[that.streamId];
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}
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bus.sendMessage("close_stream", [this.streamId], onStreamClosed);
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};
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function OutputStream() {
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this.streamId = null;
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}
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OutputStream.prototype.open = function (callback) {
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var that = this;
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bus.sendMessage("open_stream", [], function (error, result) {
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that.streamId = result[0];
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callback(error);
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});
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};
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OutputStream.prototype.write = function (data) {
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var buffer = new ArrayBuffer(data.byteLength + 1);
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var bufferView = new Uint8Array(buffer);
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bufferView[0] = this.streamId;
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bufferView.set(new Uint8Array(data), 1);
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bus.sendBinary(buffer);
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};
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OutputStream.prototype.close = function (callback) {
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bus.sendMessage("close_stream", [this.streamId], callback);
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};
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bus.createInputStream = function (callback) {
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return new InputStream();
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};
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bus.createOutputStream = function (callback) {
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return new OutputStream();
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};
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bus.sendMessage = function (method, params, callback) {
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var message = {
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"method": method,
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"id": lastId,
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"params": params,
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"jsonrpc": "2.0"
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};
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if (callback) {
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callbacks[lastId] = callback;
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}
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client.send(JSON.stringify(message));
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lastId++;
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};
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bus.onNotification = function (method, callback) {
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notificationCallbacks[method] = callback;
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};
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bus.sendBinary = function (buffer, callback) {
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client.send(buffer);
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};
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bus.listen = function (customClient) {
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if (customClient) {
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client = customClient;
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} else {
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client = new WebSocketClient();
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}
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client.onMessage = function (message) {
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if (typeof message.data != "string") {
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var dataView = new Uint8Array(message.data);
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var streamId = dataView[0];
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if (streamId in inputStreams) {
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var inputStream = inputStreams[streamId];
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inputStream.gotData(message.data.slice(1));
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}
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return;
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}
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var parsed = JSON.parse(message.data);
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var responseId = parsed.id;
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if (parsed.method) {
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var notificationCallback = notificationCallbacks[parsed.method];
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if (notificationCallback !== undefined) {
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notificationCallback(parsed.params);
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}
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return;
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}
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if (responseId in callbacks) {
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var callback = callbacks[responseId];
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if (parsed.error === null) {
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callback(null, parsed.result);
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} else {
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callback(new Error(parsed.error), null);
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}
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delete callbacks[responseId];
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}
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};
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};
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bus.close = function () {
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client.close();
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client = null;
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};
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return bus;
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});
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