1 /**

     2 * js/wswrapper.js

     3 *

     4 * simple webservice wrapper to register callbacks on onmessage

     5 *

     6 */

     7 

     8 /* global WebSocket: false */

     9 

    10 'use strict';

    11 

    12 function WsWrapper(wsurl, logger) {

    13 

    14     var url = wsurl;

    15     var sock = new WebSocket(url);

    16     var loggerObj = logger;

    17 

    18     var log = function(msg) {

    19         if(loggerObj) {

    20             loggerObj.log(msg);

    21         }

    22     };

    23 

    24     var handlers = [];

    25 

    26     sock.onopen = function() {

    27         log('Connected to ' + url);

    28     };

    29 

    30     sock.onclose = function(e) {

    31         log('Connection closed (wasClean = ' + e.wasClean + ', code = ' + e.code + ', reason = \'' + e.reason + '\')');

    32         sock = null;

    33     };

    34 

    35     sock.onmessage = function(e) {

    36         log('received ' + e.data);

    37         var data = JSON.parse(e.data);

    38         handlers.forEach(function(handler) {

    39             handler(data);

    40         });

    41     };

    42 

    43     this.message = function(handler) {

    44         if(handler) {

    45             handlers.push(handler);

    46         }

    47     };

    48 

    49 }

    50 

    51 module.exports = {

    52     WsWrapper: WsWrapper

    53 };