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: "0.5.100",
  33                 minVersion: "0.5.100"
  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 //objPath : a DBus path to access it
 205 //handler : a Javascript handler to process methods,
 206 //xml : the xml which describe interface/methods/signals...
 207 cloudeebus.Agent = function(objPath, handler, xml) {
 208         this.xml = xml;
 209         this.objectPath = objPath;
 210         this.handler = handler;
 211         return this;
 212 };
 213
 214
 215 cloudeebus.Service = function(session, busConnection, name) {
 216         this.wampSession = session;
 217         this.busConnection = busConnection;
 218         this.name = name;
 219         this.agents = [];
 220         this.isCreated = false;
 221         return this;
 222 };
 223
 224
 225 cloudeebus.Service.prototype.remove = function() {
 226         var self = this;
 227
 228         var promise = new cloudeebus.Promise(function (resolver) {
 229                 function ServiceRemovedSuccessCB(serviceName) {
 230                         resolver.fulfill(serviceName, true);
 231                 }
 232
 233                 function ServiceRemovedErrorCB(error) {
 234                         var errorStr = cloudeebus.getError(error);
 235                         resolver.reject(errorStr, true);
 236                 }
 237
 238                 var arglist = [
 239                     self.name
 240                     ];
 241
 242                 // call dbusSend with bus type, destination, object, message and arguments
 243                 self.wampSession.call("serviceRelease", arglist).then(ServiceRemovedSuccessCB, ServiceRemovedErrorCB);
 244         });
 245
 246         return promise;
 247 };
 248
 249
 250 cloudeebus.Service.prototype._searchMethod = function(ifName, method, objectJS) {
 251
 252         var funcToCall = null;
 253
 254         // Check if 'objectJS' has a member 'interfaceProxies' with an interface named 'ifName'
 255         // and a method named 'method'
 256         if (objectJS.interfaceProxies && objectJS.interfaceProxies[ifName] &&
 257                 objectJS.interfaceProxies[ifName][method]) {
 258                 funcToCall = objectJS.interfaceProxies[ifName][method];
 259         } else {
 260                 // retrieve the method directly from 'root' of objectJs
 261                 funcToCall = objectJS[method];
 262         }
 263
 264         return funcToCall;
 265 };
 266
 267
 268 cloudeebus.Service.prototype._addMethod = function(ifName, method, agent) {
 269
 270         var service = this;
 271         var methodId = this.name + "#" + agent.objectPath + "#" + ifName + "#" + method;
 272         var funcToCall = this._searchMethod(ifName, method, agent.handler);
 273
 274         if (funcToCall == null)
 275                 cloudeebus.log("Method " + method + " doesn't exist in Javascript object");
 276         else {
 277                 agent.handler.wrapperFunc[method] = function() {
 278                         var result;
 279                         var methodId = arguments[0];
 280                         var callDict = {};
 281                         // affectation of callDict in eval, otherwise dictionary(='{}') interpreted as block of code by eval
 282                         eval("callDict = " + arguments[1]);
 283                         try {
 284                                 result = funcToCall.apply(agent.handler, callDict.args);
 285                                 service._returnMethod(methodId, callDict.callIndex, true, result);
 286                         }
 287                         catch (e) {
 288                                 var errorStr = cloudeebus.getError(e);
 289                                 cloudeebus.log("Method " + ifName + "." + method + " call on " + agent.objectPath + " exception: " + errorStr);
 290                                 service._returnMethod(methodId, callDict.callIndex, false, errorStr);
 291                         }
 292                 };
 293                 agent.handler.methodId[agent.objectPath].push(methodId);
 294                 this.wampSession.subscribe(methodId, agent.handler.wrapperFunc[method]);
 295         }
 296 };
 297
 298
 299 cloudeebus.Service.prototype._addSignal = function(ifName, signal, agent) {
 300         var service = this;
 301         var methodExist = false;
 302
 303         if (agent.handler.interfaceProxies && agent.handler.interfaceProxies[ifName])
 304                 if (agent.handler.interfaceProxies[ifName][signal]) {
 305                         methodExist = true;
 306                 } else {
 307                         agent.handler.interfaceProxies[ifName][signal] = function() {
 308                                 var args = [];
 309                                 for (var i=0; i < arguments.length; i++ )
 310                                         args.push(arguments[i]);
 311                                 service._emitSignal(agent.objectPath, signal, args);
 312                         };
 313                 return;
 314         }
 315
 316         if ((agent.handler[signal] == undefined || agent.handler[signal] == null) && !methodExist)
 317                 agent.handler[signal] = function() {
 318                         var args = [];
 319                         for (var i=0; i < arguments.length; i++ )
 320                                 args.push(arguments[i]);
 321                         service._emitSignal(agent.objectPath, signal, args);
 322                 };
 323         else
 324                 cloudeebus.log("Can not create new method to emit signal '" + signal + "' in object JS this method already exist!");
 325 };
 326
 327
 328 cloudeebus.Service.prototype._createWrapper = function(agent) {
 329         var self = this;
 330         var parser = new DOMParser();
 331         var xmlDoc = parser.parseFromString(agent.xml, "text/xml");
 332         var ifXml = xmlDoc.getElementsByTagName("interface");
 333         agent.handler.wrapperFunc = {};
 334         agent.handler.methodId = {};
 335         agent.handler.methodId[agent.objectPath] = [];
 336         for (var i=0; i < ifXml.length; i++) {
 337                 var ifName = ifXml[i].attributes.getNamedItem("name").value;
 338                 var ifChild = ifXml[i].firstChild;
 339                 while (ifChild) {
 340                         if (ifChild.nodeName == "method") {
 341                                 var metName = ifChild.attributes.getNamedItem("name").value;
 342                                 self._addMethod(ifName, metName, agent);
 343                         }
 344                         if (ifChild.nodeName == "signal") {
 345                                 var metName = ifChild.attributes.getNamedItem("name").value;
 346                                 self._addSignal(ifName, metName, agent);
 347                         }
 348                         ifChild = ifChild.nextSibling;
 349                 }
 350         }
 351 };
 352
 353
 354 cloudeebus.Service.prototype.addAgent = function(agent) {
 355         var self = this;
 356
 357         var promise = new cloudeebus.Promise(function (resolver) {
 358                 function ServiceAddAgentSuccessCB(objPath) {
 359                         self.agents.push(agent);
 360                         try {
 361                                 self._createWrapper(agent);
 362                         }
 363                         catch (e) {
 364                                 var errorStr = cloudeebus.getError(e);
 365                                 cloudeebus.log("Exception creating agent wrapper " + agent.objectPath + " : " + errorStr);
 366                                 resolver.reject(errorStr, true);
 367                                 return;
 368                         }
 369                         resolver.fulfill(objPath, true);
 370                 }
 371
 372                 function ServiceAddAgenterrorCB(error) {
 373                         var errorStr = cloudeebus.getError(error);
 374                         cloudeebus.log("Error adding agent : " + agent.objectPath + ", error: " + errorStr);
 375                         self.promise.resolver.reject(errorStr, true);
 376                 }
 377
 378                 var arglist = [
 379                     self.name,
 380                     agent.objectPath,
 381                     agent.xml
 382                     ];
 383
 384                 // call dbusSend with bus type, destination, object, message and arguments
 385                 self.wampSession.call("serviceAddAgent", arglist).then(ServiceAddAgentSuccessCB, ServiceAddAgenterrorCB);
 386         });
 387
 388         return promise;
 389 };
 390
 391
 392 cloudeebus.Service.prototype._deleteWrapper = function(agent) {
 393         var objJs = agent.handler;
 394         if (objJs.methodId[agent.objectPath]) {
 395                 while (objJs.methodId[agent.objectPath].length) {
 396                         try {
 397                                 this.wampSession.unsubscribe( objJs.methodId[agent.objectPath].pop() );
 398                         }
 399                         catch (e) {
 400                                 cloudeebus.log("Unsubscribe error: " + cloudeebus.getError(e));
 401                         }
 402                 }
 403                 objJs.methodId[agent.objectPath] = null;
 404         }
 405 };
 406
 407
 408 cloudeebus.Service.prototype.removeAgent = function(rmAgent) {
 409         var self = this;
 410
 411         var promise = new cloudeebus.Promise(function (resolver) {
 412                 function ServiceRemoveAgentSuccessCB(objectPath) {
 413                         // Searching agent in list
 414                         for (var idx in self.agents)
 415                                 if (self.agents[idx].objectPath == objectPath) {
 416                                         agent = self.agents[idx];
 417                                         break;
 418                                 }
 419
 420                         self.agents.splice(idx, 1);
 421                         self._deleteWrapper(agent);
 422                         resolver.fulfill(agent, true);
 423                 }
 424
 425                 function ServiceRemoveAgentErrorCB(error) {
 426                         var errorStr = cloudeebus.getError(error);
 427                         cloudeebus.log("Error removing agent : " + rmAgent.objectPath + ", error: " + errorStr);
 428                         resolver.reject(errorStr, true);
 429                 }
 430
 431                 var arglist = [
 432                     rmAgent.objectPath
 433                     ];
 434
 435                 // call dbusSend with bus type, destination, object, message and arguments
 436                 self.wampSession.call("serviceDelAgent", arglist).then(ServiceRemoveAgentSuccessCB, ServiceRemoveAgentErrorCB);
 437         });
 438
 439         return promise;
 440 };
 441
 442
 443 cloudeebus.Service.prototype._returnMethod = function(methodId, callIndex, success, result, successCB, errorCB) {
 444         var arglist = [
 445             methodId,
 446             callIndex,
 447             success,
 448             result
 449             ];
 450
 451         this.wampSession.call("returnMethod", arglist).then(successCB, errorCB);
 452 };
 453
 454
 455 cloudeebus.Service.prototype._emitSignal = function(objectPath, signalName, args, successCB, errorCB) {
 456         var arglist = [
 457             objectPath,
 458             signalName,
 459             JSON.stringify(args)
 460             ];
 461
 462         this.wampSession.call("emitSignal", arglist).then(successCB, errorCB);
 463 };
 464
 465
 466
 467 /*****************************************************************************/
 468
 469 function _processWrappers(wrappers, value) {
 470         for (var i=0; i<wrappers.length; i++)
 471                 wrappers[i](value);
 472 }
 473
 474
 475 function _processWrappersAsync(wrappers, value) {
 476         var taskid = -1;
 477         function processAsyncOnce() {
 478                 _processWrappers(wrappers, value);
 479                 clearInterval(taskid);
 480         }
 481         taskid = setInterval(processAsyncOnce, 200);
 482 }
 483
 484
 485
 486 /*****************************************************************************/
 487
 488 cloudeebus.PromiseResolver = function(promise) {
 489         this.promise = promise;
 490         this.resolved = null;
 491     return this;
 492 };
 493
 494
 495 cloudeebus.PromiseResolver.prototype.resolve = function(value, sync) {
 496         if (this.resolved)
 497                 return;
 498
 499         var then = (value && value.then && value.then.apply) ? value.then : null;
 500         if (then) {
 501                 var self = this;
 502                 var fulfillCallback = function(arg) {
 503                         self.resolve(arg, true);
 504                 };
 505                 var rejectCallback = function(arg) {
 506                         self.reject(arg, true);
 507                 };
 508                 try {
 509                         then.apply(value, [fulfillCallback, rejectCallback]);
 510                 }
 511                 catch (e) {
 512                         this.reject(cloudeebus.getError(e), true);
 513                 }
 514         }
 515
 516         this.fulfill(value, sync);
 517 };
 518
 519
 520 cloudeebus.PromiseResolver.prototype.fulfill = function(value, sync) {
 521         if (this.resolved)
 522                 return;
 523
 524         var promise = this.promise;
 525         promise.state = "fulfilled";
 526         promise.result = value;
 527
 528         this.resolved = true;
 529         if (sync)
 530                 _processWrappers(promise._fulfillWrappers, value);
 531         else
 532                 _processWrappersAsync(promise._fulfillWrappers, value);
 533 };
 534
 535
 536 cloudeebus.PromiseResolver.prototype.reject = function(value, sync) {
 537         if (this.resolved)
 538                 return;
 539
 540         var promise = this.promise;
 541         promise.state = "rejected";
 542         promise.result = value;
 543
 544         this.resolved = true;
 545         if (sync)
 546                 _processWrappers(promise._rejectWrappers, value);
 547         else
 548                 _processWrappersAsync(promise._rejectWrappers, value);
 549 };
 550
 551
 552
 553 /*****************************************************************************/
 554
 555 cloudeebus.Promise = function(init) {
 556         this.state = "pending";
 557         this.result = null;
 558         this._fulfillWrappers = [];
 559         this._rejectWrappers = [];
 560         this.resolver = new cloudeebus.PromiseResolver(this);
 561         if (init) {
 562                 try {
 563                         init.apply(this, [this.resolver]);
 564                 }
 565                 catch (e) {
 566                         this.resolver.reject(cloudeebus.getError(e), true);
 567                 }
 568         }
 569     return this;
 570 };
 571
 572
 573 cloudeebus.Promise.prototype.appendWrappers = function(fulfillWrapper, rejectWrapper) {
 574         if (fulfillWrapper)
 575                 this._fulfillWrappers.push(fulfillWrapper);
 576         if (rejectWrapper)
 577                 this._rejectWrappers.push(rejectWrapper);
 578         if (this.state == "fulfilled")
 579                 _processWrappersAsync(this._fulfillWrappers, this.result);
 580         if (this.state == "rejected")
 581                 _processWrappersAsync(this._rejectWrappers, this.result);
 582 };
 583
 584
 585 cloudeebus.Promise.prototype.then = function(fulfillCB, rejectCB) {
 586         var promise = new cloudeebus.Promise();
 587         var resolver = promise.resolver;
 588         var fulfillWrapper, rejectWrapper;
 589
 590         if (fulfillCB)
 591                 fulfillWrapper = function(arg) {
 592                         try {
 593                                 var value = fulfillCB.apply(promise, [arg]);
 594                                 resolver.resolve(value, true);
 595                         }
 596                         catch (e) {
 597                                 resolver.reject(cloudeebus.getError(e), true);
 598                         }
 599                 };
 600         else
 601                 fulfillWrapper = function(arg) {
 602                         resolver.fulfill(arg, true);
 603                 };
 604
 605         if (rejectCB)
 606                 rejectWrapper = function(arg) {
 607                         try {
 608                                 var value = rejectCB.apply(promise, [arg]);
 609                                 resolver.resolve(value, true);
 610                         }
 611                         catch (e) {
 612                                 resolver.reject(cloudeebus.getError(e), true);
 613                         }
 614                 };
 615         else
 616                 rejectWrapper = function(arg) {
 617                         resolver.reject(arg, true);
 618                 };
 619
 620         this.appendWrappers(fulfillWrapper,rejectWrapper);
 621         return promise;
 622 };
 623
 624
 625 cloudeebus.Promise.prototype["catch"] = function(rejectCB) {
 626         return this.then(undefined,rejectCB);
 627 };
 628
 629
 630 cloudeebus.Promise.prototype.done = function(fulfillCB, rejectCB) {
 631         this.appendWrappers(fulfillCB,rejectCB);
 632 };
 633
 634
 635 cloudeebus.Promise.resolve = function(value) {
 636         var promise = new cloudeebus.Promise();
 637         promise.resolver.resolve(value);
 638         return promise;
 639 };
 640
 641
 642 cloudeebus.Promise.fulfill = function(value) {
 643         var promise = new cloudeebus.Promise();
 644         promise.resolver.fulfill(value);
 645         return promise;
 646 };
 647
 648
 649 cloudeebus.Promise.reject = function(value) {
 650         var promise = new cloudeebus.Promise();
 651         promise.resolver.reject(value);
 652         return promise;
 653 };
 654
 655
 656 cloudeebus.Promise.any = function() {
 657         var promise = new cloudeebus.Promise();
 658         var resolver = promise.resolver;
 659         var fulfillCallback = function(arg) {
 660                 resolver.resolve(arg, true);
 661         };
 662         var rejectCallback = function(arg) {
 663                 resolver.reject(arg, true);
 664         };
 665         if (arguments.length == 0)
 666                 resolver.resolve(undefined, true);
 667         else
 668                 for (i in arguments)
 669                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 670         return promise;
 671 };
 672
 673
 674 cloudeebus.Promise.every = function() {
 675         var promise = new cloudeebus.Promise();
 676         var resolver = promise.resolver;
 677         var index = 0;
 678         var countdown = arguments.length;
 679         var args = new Array(countdown);
 680         var rejectCallback = function(arg) {
 681                 resolver.reject(arg, true);
 682         };
 683         if (arguments.length == 0)
 684                 resolver.resolve(undefined, true);
 685         else
 686                 for (i in arguments) {
 687                         var fulfillCallback = function(arg) {
 688                                 args[index] = arg;
 689                                 countdown--;
 690                                 if (countdown == 0)
 691                                         resolver.resolve(args, true);
 692                         };
 693                         index++;
 694                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 695                 }
 696
 697         return promise;
 698 };
 699
 700
 701 cloudeebus.Promise.some = function() {
 702         var promise = new cloudeebus.Promise();
 703         var resolver = promise.resolver;
 704         var index = 0;
 705         var countdown = arguments.length;
 706         var args = new Array(countdown);
 707         var fulfillCallback = function(arg) {
 708                 resolver.resolve(arg, true);
 709         };
 710         if (arguments.length == 0)
 711                 resolver.resolve(undefined, true);
 712         else
 713                 for (i in arguments) {
 714                         var rejectCallback = function(arg) {
 715                                 args[index] = arg;
 716                                 countdown--;
 717                                 if (countdown == 0)
 718                                         resolver.reject(args, true);
 719                         };
 720                         index++;
 721                         cloudeebus.Promise.resolve(arguments[i]).appendWrappers(fulfillCallback,rejectCallback);
 722                 }
 723
 724         return promise;
 725 };
 726
 727
 728
 729 /*****************************************************************************/
 730
 731 cloudeebus.ProxyObject = function(session, busConnection, busName, objectPath) {
 732         this.wampSession = session;
 733         this.busConnection = busConnection;
 734         this.busName = busName;
 735         this.objectPath = objectPath;
 736         this.interfaceProxies = {};
 737         this.childNodeNames = [];
 738         return this;
 739 };
 740
 741
 742 cloudeebus.ProxyObject.prototype.getInterface = function(ifName) {
 743         return this.interfaceProxies[ifName];
 744 };
 745
 746
 747 cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
 748
 749         var self = this;
 750
 751         function getAllPropertiesSuccessCB(props) {
 752                 var ifProxy = self.interfaceProxies[self.propInterfaces[self.propInterfaces.length-1]];
 753                 for (var prop in props)
 754                         ifProxy[prop] = self[prop] = props[prop];
 755                 getAllPropertiesNextInterfaceCB();
 756         }
 757
 758         function getAllPropertiesNextInterfaceCB() {
 759                 self.propInterfaces.pop();
 760                 if (self.propInterfaces.length > 0)
 761                         self.callMethod("org.freedesktop.DBus.Properties",
 762                                 "GetAll",
 763                                 [self.propInterfaces[self.propInterfaces.length-1]]).then(getAllPropertiesSuccessCB,
 764                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 765                 else {
 766                         self.propInterfaces = null;
 767                         if (successCB)
 768                                 successCB(self);
 769                 }
 770         }
 771
 772         function introspectSuccessCB(str) {
 773                 var parser = new DOMParser();
 774                 var xmlDoc = parser.parseFromString(str, "text/xml");
 775                 var nodes = xmlDoc.getElementsByTagName("node");
 776                 // first node is the parent/head node
 777                 for(var i=1; i < nodes.length; i++)
 778                         self.childNodeNames.push(nodes[i].getAttribute("name"));
 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 };