cloudeebus/cloudeebus.js

   1 /******************************************************************************
   2  * Copyright 2012 Intel Corporation.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *****************************************************************************/
  16
  17
  18
  19 /*****************************************************************************/
  20
  21 var dbus = { // hook object for dbus types not translated by python-json
  22                 Double: function(value, level) {
  23                         return value;
  24                 }
  25 };
  26
  27
  28
  29 /*****************************************************************************/
  30
  31 var cloudeebus = window.cloudeebus = {
  32                 version: "0.5.99",
  33                 minVersion: "0.3.2"
  34 };
  35
  36 cloudeebus.reset = function() {
  37         cloudeebus.sessionBus = null;
  38         cloudeebus.systemBus = null;
  39         cloudeebus.wampSession = null;
  40         cloudeebus.uri = null;
  41 };
  42
  43
  44 cloudeebus.log = function(msg) {
  45 };
  46
  47 cloudeebus.getError = function(error) {
  48         if (error.desc && error.uri)
  49                 return error.desc + " : " + error.uri; // Python exception (cloudeebus.py)
  50         if (error.desc)
  51                 return error.desc;
  52         if (error.uri)
  53                 return error.uri;
  54         if (error.name && error.message)
  55                 return error.name + " : " + error.message; // Javascript exception
  56         if (error.message)
  57                 return error.message;
  58         if (error.name)
  59                 return error.name;
  60         return error; // Autobahn error
  61 };
  62
  63 cloudeebus.versionCheck = function(version) {
  64         var ver = version.split(".");
  65         var min = cloudeebus.minVersion.split(".");
  66         for (var i=0; i<ver.length; i++) {
  67                 if (Number(ver[i]) > Number(min[i]))
  68                         return true;
  69                 if (Number(ver[i]) < Number(min[i]))
  70                         return false;
  71         }
  72         return true;
  73 };
  74
  75
  76 cloudeebus.connect = function(uri, manifest, successCB, errorCB) {
  77         cloudeebus.reset();
  78         cloudeebus.uri = uri;
  79
  80         function onCloudeebusVersionCheckCB(version) {
  81                 if (cloudeebus.versionCheck(version)) {
  82                         cloudeebus.log("Connected to " + cloudeebus.uri);
  83                         if (successCB)
  84                                 successCB();
  85                 } else {
  86                         var errorMsg = "Cloudeebus server version " + version + " unsupported, need version " + cloudeebus.minVersion + " or superior";
  87                         cloudeebus.log(errorMsg);
  88                         if (errorCB)
  89                                 errorCB(errorMsg);
  90                 }
  91         }
  92
  93         function onWAMPSessionAuthErrorCB(error) {
  94                 var errorStr = cloudeebus.getError(error);
  95                 cloudeebus.log("Authentication error: " + errorStr);
  96                 if (errorCB)
  97                         errorCB(errorStr);
  98         }
  99
 100         function onWAMPSessionAuthenticatedCB(permissions) {
 101                 cloudeebus.sessionBus = new cloudeebus.BusConnection("session", cloudeebus.wampSession);
 102                 cloudeebus.systemBus = new cloudeebus.BusConnection("system", cloudeebus.wampSession);
 103                 cloudeebus.wampSession.call("getVersion").then(onCloudeebusVersionCheckCB, errorCB);
 104         }
 105
 106         function onWAMPSessionChallengedCB(challenge) {
 107                 var signature = cloudeebus.wampSession.authsign(challenge, manifest.key);
 108                 cloudeebus.wampSession.auth(signature).then(onWAMPSessionAuthenticatedCB, onWAMPSessionAuthErrorCB);
 109         }
 110
 111         function onWAMPSessionConnectedCB(session) {
 112                 cloudeebus.wampSession = session;
 113                 if (manifest)
 114                         cloudeebus.wampSession.authreq(
 115                                         manifest.name,
 116                                         {permissions: manifest.permissions,
 117                                                  services: manifest.services}
 118                                 ).then(onWAMPSessionChallengedCB, onWAMPSessionAuthErrorCB);
 119                 else
 120                         cloudeebus.wampSession.authreq().then(function() {
 121                                 cloudeebus.wampSession.auth().then(onWAMPSessionAuthenticatedCB, onWAMPSessionAuthErrorCB);
 122                                 }, onWAMPSessionAuthErrorCB);
 123         }
 124
 125         function onWAMPSessionErrorCB(code, reason) {
 126                 if (code == ab.CONNECTION_UNSUPPORTED) {
 127                         cloudeebus.log("Browser is not supported");
 128                 }
 129                 else {
 130                         cloudeebus.log("Failed to open session, code = " + code + ", reason = " + reason);
 131                 }
 132                 if (errorCB)
 133                         errorCB(reason);
 134         }
 135
 136         return ab.connect(cloudeebus.uri, onWAMPSessionConnectedCB, onWAMPSessionErrorCB);
 137 };
 138
 139
 140 cloudeebus.SessionBus = function() {
 141         return cloudeebus.sessionBus;
 142 };
 143
 144
 145 cloudeebus.SystemBus = function() {
 146         return cloudeebus.systemBus;
 147 };
 148
 149
 150
 151 /*****************************************************************************/
 152
 153 cloudeebus.BusConnection = function(name, session) {
 154         this.name = name;
 155         this.wampSession = session;
 156         return this;
 157 };
 158
 159
 160 cloudeebus.BusConnection.prototype.getObject = function(busName, objectPath, introspectCB, errorCB) {
 161         var proxy = new cloudeebus.ProxyObject(this.wampSession, this, busName, objectPath);
 162         if (introspectCB)
 163                 proxy._introspect(introspectCB, errorCB);
 164         return proxy;
 165 };
 166
 167
 168 cloudeebus.BusConnection.prototype.addService = function(serviceName) {
 169         var self = this;
 170
 171         if (!serviceName)
 172                 serviceName = "";
 173
 174         var promise = new cloudeebus.Promise(function (resolver) {
 175                 var cloudeebusService = new cloudeebus.Service(self.wampSession, self, serviceName);
 176
 177                 function ServiceAddedSuccessCB(serviceName) {
 178                         cloudeebusService.isCreated = true;
 179                         resolver.fulfill(cloudeebusService, true);
 180                 }
 181
 182                 function ServiceAddedErrorCB(error) {
 183                         var errorStr = cloudeebus.getError(error);
 184                         cloudeebus.log("Error adding service method: " + self.name + ", error: " + errorStr);
 185                         resolver.reject(errorStr, true);
 186                 }
 187
 188                 var arglist = [
 189                     self.name,
 190                     serviceName
 191                     ];
 192
 193                 // call dbusSend with bus type, destination, object, message and arguments
 194                 self.wampSession.call("serviceAdd", arglist).then(ServiceAddedSuccessCB, ServiceAddedErrorCB);
 195         });
 196
 197         return promise;
 198 };
 199
 200
 201
 202 /*****************************************************************************/
 203 //Generic definition for an agent. An agent needs :
 204 //srvDbusName : the DBus parent service
 205 //objPath : a DBus path to access it
 206 //jsHdl : a Javascript handler to process methods,
 207 //xml : the xml which describe interface/methods/signals...
 208 cloudeebus.Agent = function(objPath, jsHdl, xml) {
 209 //      this.srvName = srvDbusName;
 210         this.xml = xml;
 211         this.objectPath = objPath;
 212         this.jsHdl = jsHdl;
 213         return this;
 214 };
 215
 216
 217 cloudeebus.Service = function(session, busConnection, name) {
 218         this.wampSession = session;
 219         this.busConnection = busConnection;
 220         this.name = name;
 221         this.agents = [];
 222         this.isCreated = false;
 223         return this;
 224 };
 225
 226
 227 cloudeebus.Service.prototype.remove = function() {
 228         var self = this;
 229
 230         var promise = new cloudeebus.Promise(function (resolver) {
 231                 function ServiceRemovedSuccessCB(serviceName) {
 232                         resolver.fulfill(serviceName, true);
 233                 }
 234
 235                 function ServiceRemovedErrorCB(error) {
 236                         var errorStr = cloudeebus.getError(error);
 237                         resolver.reject(errorStr, true);
 238                 }
 239
 240                 var arglist = [
 241                     self.name
 242                     ];
 243
 244                 // call dbusSend with bus type, destination, object, message and arguments
 245                 self.wampSession.call("serviceRelease", arglist).then(ServiceRemovedSuccessCB, ServiceRemovedErrorCB);
 246         });
 247
 248         return promise;
 249 };
 250
 251
 252 cloudeebus.Service.prototype._searchMethod = function(ifName, method, objectJS) {
 253
 254         var funcToCall = null;
 255
 256         // Check if 'objectJS' has a member 'interfaceProxies' with an interface named 'ifName'
 257         // and a method named 'method'
 258         if (objectJS.interfaceProxies && objectJS.interfaceProxies[ifName] &&
 259                 objectJS.interfaceProxies[ifName][method]) {
 260                 funcToCall = objectJS.interfaceProxies[ifName][method];
 261         } else {
 262                 // retrieve the method directly from 'root' of objectJs
 263                 funcToCall = objectJS[method];
 264         }
 265
 266         return funcToCall;
 267 };
 268
 269
 270 cloudeebus.Service.prototype._addMethod = function(ifName, method, agent) {
 271
 272         var service = this;
 273         var methodId = this.name + "#" + agent.objectPath + "#" + ifName + "#" + method;
 274         var funcToCall = this._searchMethod(ifName, method, agent.jsHdl);
 275
 276         if (funcToCall == null)
 277                 cloudeebus.log("Method " + method + " doesn't exist in Javascript object");
 278         else {
 279                 agent.jsHdl.wrapperFunc[method] = function() {
 280                         var result;
 281                         var methodId = arguments[0];
 282                         var callDict = {};
 283                         // affectation of callDict in eval, otherwise dictionary(='{}') interpreted as block of code by eval
 284                         eval("callDict = " + arguments[1]);
 285                         try {
 286                                 result = funcToCall.apply(agent.jsHdl, callDict.args);
 287                                 service._returnMethod(methodId, callDict.callIndex, true, result);
 288                         }
 289                         catch (e) {
 290                                 var errorStr = cloudeebus.getError(e);
 291                                 cloudeebus.log("Method " + ifName + "." + method + " call on " + agent.objectPath + " exception: " + errorStr);
 292                                 service._returnMethod(methodId, callDict.callIndex, false, errorStr);
 293                         }
 294                 };
 295                 agent.jsHdl.methodId[agent.objectPath].push(methodId);
 296                 this.wampSession.subscribe(methodId, agent.jsHdl.wrapperFunc[method]);
 297         }
 298 };
 299
 300
 301 cloudeebus.Service.prototype._addSignal = function(ifName, signal, agent) {
 302         var service = this;
 303         var methodExist = false;
 304
 305         if (agent.jsHdl.interfaceProxies && agent.jsHdl.interfaceProxies[ifName])
 306                 if (agent.jsHdl.interfaceProxies[ifName][signal]) {
 307                         methodExist = true;
 308                 } else {
 309                         agent.jsHdl.interfaceProxies[ifName][signal] = function() {
 310                                 service._emitSignal(agent.objectPath, signal, arguments[0]);
 311                         };
 312                 return;
 313         }
 314
 315         if ((agent.jsHdl[signal] == undefined || agent.jsHdl[signal] == null) && !methodExist)
 316                 agent.jsHdl[signal] = function() {
 317                         service._emitSignal(agent.objectPath, signal, arguments[0]);
 318                 };
 319         else
 320                 cloudeebus.log("Can not create new method to emit signal '" + signal + "' in object JS this method already exist!");
 321 };
 322
 323
 324 cloudeebus.Service.prototype._createWrapper = function(agent) {
 325         var self = this;
 326         var parser = new DOMParser();
 327         var xmlDoc = parser.parseFromString(agent.xml, "text/xml");
 328         var ifXml = xmlDoc.getElementsByTagName("interface");
 329         agent.jsHdl.wrapperFunc = {};
 330         agent.jsHdl.methodId = {};
 331         agent.jsHdl.methodId[agent.objectPath] = [];
 332         for (var i=0; i < ifXml.length; i++) {
 333                 var ifName = ifXml[i].attributes.getNamedItem("name").value;
 334                 var ifChild = ifXml[i].firstChild;
 335                 while (ifChild) {
 336                         if (ifChild.nodeName == "method") {
 337                                 var metName = ifChild.attributes.getNamedItem("name").value;
 338                                 self._addMethod(ifName, metName, agent);
 339                         }
 340                         if (ifChild.nodeName == "signal") {
 341                                 var metName = ifChild.attributes.getNamedItem("name").value;
 342                                 self._addSignal(ifName, metName, agent);
 343                         }
 344                         ifChild = ifChild.nextSibling;
 345                 }
 346         }
 347 };
 348
 349
 350 cloudeebus.Service.prototype.addAgent = function(agent) {
 351         var self = this;
 352
 353         var promise = new cloudeebus.Promise(function (resolver) {
 354                 function ServiceAddAgentSuccessCB(objPath) {
 355                         self.agents.push(agent);
 356                         resolver.fulfill(objPath, true);
 357                 }
 358
 359                 function ServiceAddAgenterrorCB(error) {
 360                         var errorStr = cloudeebus.getError(error);
 361                         cloudeebus.log("Error adding agent : " + agent.objectPath + ", error: " + errorStr);
 362                         self.promise.resolver.reject(errorStr, true);
 363                 }
 364
 365                 try {
 366                         self._createWrapper(agent);
 367                 }
 368                 catch (e) {
 369                         var errorStr = cloudeebus.getError(e);
 370                         cloudeebus.log("Exception creating agent wrapper " + agent.objectPath + " : " + errorStr);
 371                         resolver.reject(errorStr, true);
 372                         return;
 373                 }
 374
 375                 var arglist = [
 376                     agent.objectPath,
 377                     agent.xml
 378                     ];
 379
 380                 // call dbusSend with bus type, destination, object, message and arguments
 381                 self.wampSession.call("serviceAddAgent", arglist).then(ServiceAddAgentSuccessCB, ServiceAddAgenterrorCB);
 382         });
 383
 384         return promise;
 385 };
 386
 387
 388 cloudeebus.Service.prototype._deleteWrapper = function(agent) {
 389         var objJs = agent.jsHdl;
 390         if (objJs.methodId[agent.objectPath]) {
 391                 while (objJs.methodId[agent.objectPath].length) {
 392                         try {
 393                                 this.wampSession.unsubscribe( objJs.methodId[agent.objectPath].pop() );
 394                         }
 395                         catch (e) {
 396                                 cloudeebus.log("Unsubscribe error: " + cloudeebus.getError(e));
 397                         }
 398                 }
 399                 objJs.methodId[agent.objectPath] = null;
 400         }
 401 };
 402
 403
 404 cloudeebus.Service.prototype.removeAgent = function(rmAgent) {
 405         var self = this;
 406
 407         var promise = new cloudeebus.Promise(function (resolver) {
 408                 function ServiceRemoveAgentSuccessCB(objectPath) {
 409                         // Searching agent in list
 410                         for (var idx in self.agents)
 411                                 if (self.agents[idx].objectPath == objectPath) {
 412                                         agent = self.agents[idx];
 413                                         break;
 414                                 }
 415
 416                         self.agents.splice(idx, 1);
 417                         self._deleteWrapper(agent);
 418                         resolver.fulfill(agent, true);
 419                 }
 420
 421                 function ServiceRemoveAgentErrorCB(error) {
 422                         var errorStr = cloudeebus.getError(error);
 423                         cloudeebus.log("Error removing agent : " + rmAgent.objectPath + ", error: " + errorStr);
 424                         resolver.reject(errorStr, true);
 425                 }
 426
 427                 var arglist = [
 428                     rmAgent.objectPath
 429                     ];
 430
 431                 // call dbusSend with bus type, destination, object, message and arguments
 432                 self.wampSession.call("serviceDelAgent", arglist).then(ServiceRemoveAgentSuccessCB, ServiceRemoveAgentErrorCB);
 433         });
 434
 435         return promise;
 436 };
 437
 438
 439 cloudeebus.Service.prototype._returnMethod = function(methodId, callIndex, success, result, successCB, errorCB) {
 440         var arglist = [
 441             methodId,
 442             callIndex,
 443             success,
 444             result
 445             ];
 446
 447         this.wampSession.call("returnMethod", arglist).then(successCB, errorCB);
 448 };
 449
 450
 451 cloudeebus.Service.prototype._emitSignal = function(objectPath, signalName, result, successCB, errorCB) {
 452         var arglist = [
 453             objectPath,
 454             signalName,
 455             result
 456             ];
 457
 458         this.wampSession.call("emitSignal", arglist).then(successCB, errorCB);
 459 };
 460
 461
 462
 463 /*****************************************************************************/
 464
 465 function _processWrappers(wrappers, value) {
 466         for (var i=0; i<wrappers.length; i++)
 467                 wrappers[i](value);
 468 }
 469
 470
 471 function _processWrappersAsync(wrappers, value) {
 472         var taskid = -1;
 473         function processAsyncOnce() {
 474                 _processWrappers(wrappers, value);
 475                 clearInterval(taskid);
 476         }
 477         taskid = setInterval(processAsyncOnce, 200);
 478 }
 479
 480
 481
 482 /*****************************************************************************/
 483
 484 cloudeebus.PromiseResolver = function(promise) {
 485         this.promise = promise;
 486         this.resolved = null;
 487     return this;
 488 };
 489
 490
 491 cloudeebus.PromiseResolver.prototype.resolve = function(value, sync) {
 492         if (this.resolved)
 493                 return;
 494
 495         var then = (value && value.then && value.then.apply) ? value.then : null;
 496         if (then) {
 497                 var self = this;
 498                 var fulfillCallback = function(arg) {
 499                         self.resolve(arg, true);
 500                 };
 501                 var rejectCallback = function(arg) {
 502                         self.reject(arg, true);
 503                 };
 504                 try {
 505                         then.apply(value, [fulfillCallback, rejectCallback]);
 506                 }
 507                 catch (e) {
 508                         this.reject(cloudeebus.getError(e), true);
 509                 }
 510         }
 511
 512         this.fulfill(value, sync);
 513 };
 514
 515
 516 cloudeebus.PromiseResolver.prototype.fulfill = function(value, sync) {
 517         if (this.resolved)
 518                 return;
 519
 520         var promise = this.promise;
 521         promise.state = "fulfilled";
 522         promise.result = value;
 523
 524         this.resolved = true;
 525         if (sync)
 526                 _processWrappers(promise._fulfillWrappers, value);
 527         else
 528                 _processWrappersAsync(promise._fulfillWrappers, value);
 529 };
 530
 531
 532 cloudeebus.PromiseResolver.prototype.reject = function(value, sync) {
 533         if (this.resolved)
 534                 return;
 535
 536         var promise = this.promise;
 537         promise.state = "rejected";
 538         promise.result = value;
 539
 540         this.resolved = true;
 541         if (sync)
 542                 _processWrappers(promise._rejectWrappers, value);
 543         else
 544                 _processWrappersAsync(promise._rejectWrappers, value);
 545 };
 546
 547
 548
 549 /*****************************************************************************/
 550
 551 cloudeebus.Promise = function(init) {
 552         this.state = "pending";
 553         this.result = null;
 554         this._fulfillWrappers = [];
 555         this._rejectWrappers = [];
 556         this.resolver = new cloudeebus.PromiseResolver(this);
 557         if (init) {
 558                 try {
 559                         init.apply(this, [this.resolver]);
 560                 }
 561                 catch (e) {
 562                         this.resolver.reject(cloudeebus.getError(e), true);
 563                 }
 564         }
 565     return this;
 566 };
 567
 568
 569 cloudeebus.Promise.prototype.appendWrappers = function(fulfillWrapper, rejectWrapper) {
 570         if (fulfillWrapper)
 571                 this._fulfillWrappers.push(fulfillWrapper);
 572         if (rejectWrapper)
 573                 this._rejectWrappers.push(rejectWrapper);
 574         if (this.state == "fulfilled")
 575                 _processWrappersAsync(this._fulfillWrappers, this.result);
 576         if (this.state == "rejected")
 577                 _processWrappersAsync(this._rejectWrappers, this.result);
 578 };
 579
 580
 581 cloudeebus.Promise.prototype.then = function(fulfillCB, rejectCB) {
 582         var promise = new cloudeebus.Promise();
 583         var resolver = promise.resolver;
 584         var fulfillWrapper, rejectWrapper;
 585
 586         if (fulfillCB)
 587                 fulfillWrapper = function(arg) {
 588                         try {
 589                                 var value = fulfillCB.apply(promise, [arg]);
 590                                 resolver.resolve(value, true);
 591                         }
 592                         catch (e) {
 593                                 resolver.reject(cloudeebus.getError(e), true);
 594                         }
 595                 };
 596         else
 597                 fulfillWrapper = function(arg) {
 598                         resolver.fulfill(arg, true);
 599                 };
 600
 601         if (rejectCB)
 602                 rejectWrapper = function(arg) {
 603                         try {
 604                                 var value = rejectCB.apply(promise, [arg]);
 605                                 resolver.resolve(value, true);
 606                         }
 607                         catch (e) {
 608                                 resolver.reject(cloudeebus.getError(e), true);
 609                         }
 610                 };
 611         else
 612                 rejectWrapper = function(arg) {
 613                         resolver.reject(arg, true);
 614                 };
 615
 616         this.appendWrappers(fulfillWrapper,rejectWrapper);
 617         return promise;
 618 };
 619
 620
 621 cloudeebus.Promise.prototype["catch"] = function(rejectCB) {
 622         return this.then(undefined,rejectCB);
 623 };
 624
 625
 626 cloudeebus.Promise.prototype.done = function(fulfillCB, rejectCB) {
 627         this.appendWrappers(fulfillCB,rejectCB);
 628 };
 629
 630
 631 cloudeebus.Promise.resolve = function(value) {
 632         var promise = new cloudeebus.Promise();
 633         promise.resolver.resolve(value);
 634         return promise;
 635 };
 636
 637
 638 cloudeebus.Promise.fulfill = function(value) {
 639         var promise = new cloudeebus.Promise();
 640         promise.resolver.fulfill(value);
 641         return promise;
 642 };
 643
 644
 645 cloudeebus.Promise.reject = function(value) {
 646         var promise = new cloudeebus.Promise();
 647         promise.resolver.reject(value);
 648         return promise;
 649 };
 650
 651
 652 cloudeebus.Promise.any = function() {
 653         var promise = new cloudeebus.Promise();
 654         var resolver = promise.resolver;
 655         var fulfillCallback = function(arg) {
 656                 resolver.resolve(arg, true);
 657         };
 658         var rejectCallback = function(arg) {
 659                 resolver.reject(arg, true);
 660         };
 661         if (arguments.length == 0)
 662                 resolver.resolve(undefined, true);
 663         else
 664                 for (i in arguments)
 665                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 666         return promise;
 667 };
 668
 669
 670 cloudeebus.Promise.every = function() {
 671         var promise = new cloudeebus.Promise();
 672         var resolver = promise.resolver;
 673         var index = 0;
 674         var countdown = arguments.length;
 675         var args = new Array(countdown);
 676         var rejectCallback = function(arg) {
 677                 resolver.reject(arg, true);
 678         };
 679         if (arguments.length == 0)
 680                 resolver.resolve(undefined, true);
 681         else
 682                 for (i in arguments) {
 683                         var fulfillCallback = function(arg) {
 684                                 args[index] = arg;
 685                                 countdown--;
 686                                 if (countdown == 0)
 687                                         resolver.resolve(args, true);
 688                         };
 689                         index++;
 690                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 691                 }
 692
 693         return promise;
 694 };
 695
 696
 697 cloudeebus.Promise.some = function() {
 698         var promise = new cloudeebus.Promise();
 699         var resolver = promise.resolver;
 700         var index = 0;
 701         var countdown = arguments.length;
 702         var args = new Array(countdown);
 703         var fulfillCallback = function(arg) {
 704                 resolver.resolve(arg, true);
 705         };
 706         if (arguments.length == 0)
 707                 resolver.resolve(undefined, true);
 708         else
 709                 for (i in arguments) {
 710                         var rejectCallback = function(arg) {
 711                                 args[index] = arg;
 712                                 countdown--;
 713                                 if (countdown == 0)
 714                                         resolver.reject(args, true);
 715                         };
 716                         index++;
 717                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 718                 }
 719
 720         return promise;
 721 };
 722
 723
 724
 725 /*****************************************************************************/
 726
 727 cloudeebus.ProxyObject = function(session, busConnection, busName, objectPath) {
 728         this.wampSession = session;
 729         this.busConnection = busConnection;
 730         this.busName = busName;
 731         this.objectPath = objectPath;
 732         this.interfaceProxies = {};
 733         return this;
 734 };
 735
 736
 737 cloudeebus.ProxyObject.prototype.getInterface = function(ifName) {
 738         return this.interfaceProxies[ifName];
 739 };
 740
 741
 742 cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
 743
 744         var self = this;
 745
 746         function getAllPropertiesSuccessCB(props) {
 747                 var ifProxy = self.interfaceProxies[self.propInterfaces[self.propInterfaces.length-1]];
 748                 for (var prop in props)
 749                         ifProxy[prop] = self[prop] = props[prop];
 750                 getAllPropertiesNextInterfaceCB();
 751         }
 752
 753         function getAllPropertiesNextInterfaceCB() {
 754                 self.propInterfaces.pop();
 755                 if (self.propInterfaces.length > 0)
 756                         self.callMethod("org.freedesktop.DBus.Properties",
 757                                 "GetAll",
 758                                 [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB,
 759                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 760                 else {
 761                         self.propInterfaces = null;
 762                         if (successCB)
 763                                 successCB(self);
 764                 }
 765         }
 766
 767         function introspectSuccessCB(str) {
 768                 var parser = new DOMParser();
 769                 var xmlDoc = parser.parseFromString(str, "text/xml");
 770                 var nodes = xmlDoc.getElementsByTagName("node");
 771                 self.childNodeNames = [];
 772                 var l = nodes.length;
 773                 //there will always be 1 node, the parent/head node
 774                 if(l > 1){
 775                         for(var i = 1; i < l; i++){
 776                                 self.childNodeNames.push(nodes[i].getAttribute("name"));
 777                         }
 778                 }
 779                 var interfaces = xmlDoc.getElementsByTagName("interface");
 780                 self.propInterfaces = [];
 781                 var supportDBusProperties = false;
 782                 for (var i=0; i < interfaces.length; i++) {
 783                         var ifName = interfaces[i].attributes.getNamedItem("name").value;
 784                         self.interfaceProxies[ifName] = new cloudeebus.ProxyObject(self.wampSession, self.busConnection, self.busName, self.objectPath);
 785                         if (ifName == "org.freedesktop.DBus.Properties")
 786                                 supportDBusProperties = true;
 787                         var hasProperties = false;
 788                         var ifChild = interfaces[i].firstChild;
 789                         while (ifChild) {
 790                                 if (ifChild.nodeName == "method") {
 791                                         var nArgs = 0;
 792                                         var signature = "";
 793                                         var metChild = ifChild.firstChild;
 794                                         while (metChild) {
 795                                                 if (metChild.nodeName == "arg" &&
 796                                                         metChild.attributes.getNamedItem("direction").value == "in") {
 797                                                                 signature += metChild.attributes.getNamedItem("type").value;
 798                                                                 nArgs++;
 799                                                 }
 800                                                 metChild = metChild.nextSibling;
 801                                         }
 802                                         var metName = ifChild.attributes.getNamedItem("name").value;
 803                                         if (!self[metName])
 804                                                 self._addMethod(ifName, metName, nArgs, signature);
 805                                         self.interfaceProxies[ifName]._addMethod(ifName, metName, nArgs, signature);
 806                                 }
 807                                 else if (ifChild.nodeName == "property") {
 808                                         if (!hasProperties)
 809                                                 self.propInterfaces.push(ifName);
 810                                         hasProperties = true;
 811                                 }
 812                                 ifChild = ifChild.nextSibling;
 813                         }
 814                 }
 815                 if (supportDBusProperties && self.propInterfaces.length > 0) {
 816                         self.callMethod("org.freedesktop.DBus.Properties",
 817                                 "GetAll",
 818                                 [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB,
 819                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 820                 }
 821                 else {
 822                         self.propInterfaces = null;
 823                         if (successCB)
 824                                 successCB(self);
 825                 }
 826         }
 827
 828         // call Introspect on self
 829         self.callMethod("org.freedesktop.DBus.Introspectable", "Introspect", []).then(introspectSuccessCB, errorCB);
 830 };
 831
 832
 833 cloudeebus.ProxyObject.prototype._addMethod = function(ifName, method, nArgs, signature) {
 834
 835         var self = this;
 836
 837         self[method] = function() {
 838                 var args = [];
 839                 for (var i=0; i < nArgs; i++ )
 840                         args.push(arguments[i]);
 841                 return self.callMethod(ifName, method, args, signature);
 842         };
 843 };
 844
 845
 846 cloudeebus.ProxyObject.prototype.callMethod = function(ifName, method, args, signature) {
 847
 848         var self = this;
 849
 850         var promise = new cloudeebus.Promise(function (resolver) {
 851                 function callMethodSuccessCB(str) {
 852                         try { // calling dbus hook object function for un-translated types
 853                                 var result = eval(str);
 854                                 resolver.fulfill(result[0], true);
 855                         }
 856                         catch (e) {
 857                                 var errorStr = cloudeebus.getError(e);
 858                                 cloudeebus.log("Method callback exception: " + errorStr);
 859                                 resolver.reject(errorStr, true);
 860                         }
 861                 }
 862
 863                 function callMethodErrorCB(error) {
 864                         var errorStr = cloudeebus.getError(error);
 865                         cloudeebus.log("Error calling method: " + method + " on object: " + self.objectPath + " : " + errorStr);
 866                         resolver.reject(errorStr, true);
 867                 }
 868
 869                 var arglist = [
 870                         self.busConnection.name,
 871                         self.busName,
 872                         self.objectPath,
 873                         ifName,
 874                         method,
 875                         JSON.stringify(args)
 876                 ];
 877
 878                 // call dbusSend with bus type, destination, object, message and arguments
 879                 self.wampSession.call("dbusSend", arglist).then(callMethodSuccessCB, callMethodErrorCB);
 880         });
 881
 882         return promise;
 883 };
 884
 885
 886 cloudeebus.ProxyObject.prototype.connectToSignal = function(ifName, signal, handlerCB, errorCB) {
 887
 888         var self = this;
 889
 890         function signalHandler(id, data) {
 891                 if (handlerCB) {
 892                         try { // calling dbus hook object function for un-translated types
 893                                 handlerCB.apply(self, eval(data));
 894                         }
 895                         catch (e) {
 896                                 var errorStr = cloudeebus.getError(e);
 897                                 cloudeebus.log("Signal handler exception: " + errorStr);
 898                                 if (errorCB)
 899                                         errorCB(errorStr);
 900                         }
 901                 }
 902         }
 903
 904         function connectToSignalSuccessCB(str) {
 905                 try {
 906                         self.wampSession.subscribe(str, signalHandler);
 907                 }
 908                 catch (e) {
 909                         cloudeebus.log("Subscribe error: " + cloudeebus.getError(e));
 910                 }
 911         }
 912
 913         function connectToSignalErrorCB(error) {
 914                 var errorStr = cloudeebus.getError(error);
 915                 cloudeebus.log("Error connecting to signal: " + signal + " on object: " + self.objectPath + " : " + errorStr);
 916                 if (errorCB)
 917                         errorCB(errorStr);
 918         }
 919
 920         var arglist = [
 921                 self.busConnection.name,
 922                 self.busName,
 923                 self.objectPath,
 924                 ifName,
 925                 signal
 926         ];
 927
 928         // call dbusSend with bus type, destination, object, message and arguments
 929         self.wampSession.call("dbusRegister", arglist).then(connectToSignalSuccessCB, connectToSignalErrorCB);
 930 };
 931
 932
 933 cloudeebus.ProxyObject.prototype.disconnectSignal = function(ifName, signal) {
 934         try {
 935                 this.wampSession.unsubscribe(this.busConnection.name + "#" + this.busName + "#" + this.objectPath + "#" + ifName + "#" + signal);
 936         }
 937         catch (e) {
 938                 cloudeebus.log("Unsubscribe error: " + cloudeebus.getError(e));
 939         }
 940 };