js/pz2.js

   1 /*
   2  * $Id$
   3 ** pz2.js - pazpar2's javascript client library.
   4 */
   5
   6 //since explorer is flawed
   7 if (!window['Node']) {
   8     window.Node = new Object();
   9     Node.ELEMENT_NODE = 1;
  10     Node.ATTRIBUTE_NODE = 2;
  11     Node.TEXT_NODE = 3;
  12     Node.CDATA_SECTION_NODE = 4;
  13     Node.ENTITY_REFERENCE_NODE = 5;
  14     Node.ENTITY_NODE = 6;
  15     Node.PROCESSING_INSTRUCTION_NODE = 7;
  16     Node.COMMENT_NODE = 8;
  17     Node.DOCUMENT_NODE = 9;
  18     Node.DOCUMENT_TYPE_NODE = 10;
  19     Node.DOCUMENT_FRAGMENT_NODE = 11;
  20     Node.NOTATION_NODE = 12;
  21 }
  22
  23 // prevent execution of more than once
  24 if(typeof window.pz2 == "undefined") {
  25 window.undefined = window.undefined;
  26
  27 var pz2 = function ( paramArray )
  28 {
  29
  30     // at least one callback required
  31     if ( !paramArray )
  32         throw new Error("Pz2.js: Array with parameters has to be supplied.");
  33
  34     //supported pazpar2's protocol version
  35     this.windowid = paramArray.windowid || window.name;
  36     this.suppProtoVer = '1';
  37     if (typeof paramArray.pazpar2path != "undefined")
  38         this.pz2String = paramArray.pazpar2path;
  39     else
  40         this.pz2String = "/pazpar2/search.pz2";
  41     this.useSessions = true;
  42
  43     this.stylesheet = paramArray.detailstylesheet || null;
  44     //load stylesheet if required in async mode
  45     if( this.stylesheet ) {
  46         var context = this;
  47         var request = new pzHttpRequest( this.stylesheet );
  48         request.get( {}, function ( doc ) { context.xslDoc = doc; } );
  49     }
  50
  51     this.errorHandler = paramArray.errorhandler || null;
  52     this.showResponseType = paramArray.showResponseType || "xml";
  53
  54     // function callbacks
  55     this.initCallback = paramArray.oninit || null;
  56     this.statCallback = paramArray.onstat || null;
  57     this.showCallback = paramArray.onshow || null;
  58     this.termlistCallback = paramArray.onterm || null;
  59     this.recordCallback = paramArray.onrecord || null;
  60     this.bytargetCallback = paramArray.onbytarget || null;
  61     this.resetCallback = paramArray.onreset || null;
  62
  63     // termlist keys
  64     this.termKeys = paramArray.termlist || "subject";
  65
  66     // some configurational stuff
  67     this.keepAlive = 50000;
  68
  69     if ( paramArray.keepAlive < this.keepAlive )
  70         this.keepAlive = paramArray.keepAlive;
  71
  72     this.sessionID = null;
  73     this.serviceId = paramArray.serviceId || null;
  74     this.initStatusOK = false;
  75     this.pingStatusOK = false;
  76     this.searchStatusOK = false;
  77     this.mergekey = paramArray.mergekey || null;
  78     this.rank = paramArray.rank || null;
  79
  80     // for sorting
  81     this.currentSort = "relevance";
  82
  83     // where are we?
  84     this.currentStart = 0;
  85     // currentNum can be overwritten in show
  86     this.currentNum = 20;
  87
  88     // last full record retrieved
  89     this.currRecID = null;
  90
  91     // current query
  92     this.currQuery = null;
  93
  94     //current raw record offset
  95     this.currRecOffset = null;
  96
  97     //timers
  98     this.pingTimer = null;
  99     this.statTime = paramArray.stattime || 1000;
 100     this.statTimer = null;
 101     this.termTime = paramArray.termtime || 1000;
 102     this.termTimer = null;
 103     this.showTime = paramArray.showtime || 1000;
 104     this.showTimer = null;
 105     this.showFastCount = 4;
 106     this.bytargetTime = paramArray.bytargettime || 1000;
 107     this.bytargetTimer = null;
 108     this.recordTime = paramArray.recordtime || 500;
 109     this.recordTimer = null;
 110
 111     // counters for each command and applied delay
 112     this.dumpFactor = 500;
 113     this.showCounter = 0;
 114     this.termCounter = 0;
 115     this.statCounter = 0;
 116     this.bytargetCounter = 0;
 117     this.recordCounter = 0;
 118
 119     // active clients, updated by stat and show
 120     // might be an issue since bytarget will poll accordingly
 121     this.activeClients = 1;
 122
 123     // if in proxy mode no need to init
 124     if (paramArray.usesessions != undefined) {
 125          this.useSessions = paramArray.usesessions;
 126         this.initStatusOK = true;
 127     }
 128     // else, auto init session or wait for a user init?
 129     if (this.useSessions && paramArray.autoInit !== false) {
 130         this.init(this.sessionID, this.serviceId);
 131     }
 132     // Version parameter
 133     this.version = paramArray.version || null;
 134 };
 135
 136 pz2.prototype =
 137 {
 138     //error handler for async error throws
 139    throwError: function (errMsg, errCode)
 140    {
 141         var err = new Error(errMsg);
 142         if (errCode) err.code = errCode;
 143
 144         if (this.errorHandler) {
 145             this.errorHandler(err);
 146         }
 147         else {
 148             throw err;
 149         }
 150    },
 151
 152     // stop activity by clearing tiemouts
 153    stop: function ()
 154    {
 155        clearTimeout(this.statTimer);
 156        clearTimeout(this.showTimer);
 157        clearTimeout(this.termTimer);
 158        clearTimeout(this.bytargetTimer);
 159     },
 160
 161     // reset status variables
 162     reset: function ()
 163     {
 164         if ( this.useSessions ) {
 165             this.sessionID = null;
 166             this.initStatusOK = false;
 167             this.pingStatusOK = false;
 168             clearTimeout(this.pingTimer);
 169         }
 170         this.searchStatusOK = false;
 171         this.stop();
 172
 173         if ( this.resetCallback )
 174                 this.resetCallback(this.windowid);
 175     },
 176
 177     init: function (sessionId, serviceId)
 178     {
 179         this.reset();
 180
 181         // session id as a param
 182         if (sessionId && this.useSessions ) {
 183             this.initStatusOK = true;
 184             this.sessionID = sessionId;
 185             this.ping();
 186         // old school direct pazpar2 init
 187         } else if (this.useSessions) {
 188             var context = this;
 189             var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 190             var opts = {'command' : 'init'};
 191             if (serviceId) opts.service = serviceId;
 192             request.safeGet(
 193                 opts,
 194                 function(data) {
 195                     if ( data.getElementsByTagName("status")[0]
 196                             .childNodes[0].nodeValue == "OK" ) {
 197                         if ( data.getElementsByTagName("protocol")[0]
 198                                 .childNodes[0].nodeValue
 199                             != context.suppProtoVer )
 200                             throw new Error(
 201                                 "Server's protocol not supported by the client"
 202                             );
 203                         context.initStatusOK = true;
 204                         context.sessionID =
 205                             data.getElementsByTagName("session")[0]
 206                                 .childNodes[0].nodeValue;
 207                         if (data.getElementsByTagName("keepAlive").length > 0) {
 208                             context.keepAlive = data.getElementsByTagName("keepAlive")[0].childNodes[0].nodeValue;
 209                         }
 210                         context.pingTimer =
 211                             setTimeout(
 212                                 function () {
 213                                     context.ping();
 214                                 },
 215                                 context.keepAlive
 216                             );
 217                         if ( context.initCallback )
 218                             context.initCallback(this.windowid);
 219                     }
 220                     else
 221                         context.throwError('Init failed. Malformed WS resonse.',
 222                                             110);
 223                 }
 224             );
 225         // when through proxy no need to init
 226         } else {
 227             this.initStatusOK = true;
 228         }
 229     },
 230     // no need to ping explicitly
 231     ping: function ()
 232     {
 233         // pinging only makes sense when using pazpar2 directly
 234         if( !this.initStatusOK || !this.useSessions )
 235             throw new Error(
 236             'Pz2.js: Ping not allowed (proxy mode) or session not initialized.'
 237             );
 238         var context = this;
 239
 240         clearTimeout(context.pingTimer);
 241
 242         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 243         request.safeGet(
 244             { "command": "ping", "session": this.sessionID, "windowid" : this.windowid },
 245             function(data) {
 246                 if ( data.getElementsByTagName("status")[0]
 247                         .childNodes[0].nodeValue == "OK" ) {
 248                     context.pingStatusOK = true;
 249                     context.pingTimer =
 250                         setTimeout(
 251                             function () {
 252                                 context.ping();
 253                             },
 254                             context.keepAlive
 255                         );
 256                 }
 257                 else
 258                     context.throwError('Ping failed. Malformed WS resonse.',
 259                                         111);
 260             }
 261         );
 262     },
 263     search: function (query, num, sort, filter, showfrom, addParamsArr)
 264     {
 265         clearTimeout(this.statTimer);
 266         clearTimeout(this.showTimer);
 267         clearTimeout(this.termTimer);
 268         clearTimeout(this.bytargetTimer);
 269
 270         this.showCounter = 0;
 271         this.termCounter = 0;
 272         this.bytargetCounter = 0;
 273         this.statCounter = 0;
 274         this.activeClients = 1;
 275
 276         // no proxy mode
 277         if( !this.initStatusOK )
 278             throw new Error('Pz2.js: session not initialized.');
 279
 280         if( query !== undefined )
 281             this.currQuery = query;
 282         else
 283             throw new Error("Pz2.js: no query supplied to the search command.");
 284
 285         if ( showfrom !== undefined )
 286             var start = showfrom;
 287         else
 288             var start = 0;
 289
 290         var searchParams = {
 291           "command": "search",
 292           "query": this.currQuery,
 293           "session": this.sessionID,
 294           "windowid" : this.windowid
 295         };
 296
 297         if( sort !== undefined ) {
 298             this.currentSort = sort;
 299             searchParams["sort"] = sort;
 300         }
 301         if (filter !== undefined) searchParams["filter"] = filter;
 302         if (this.mergekey) searchParams["mergekey"] = this.mergekey;
 303         if (this.rank) searchParams["rank"] = this.rank;
 304
 305         // copy additional parmeters, do not overwrite
 306         if (addParamsArr != undefined) {
 307             for (var prop in addParamsArr) {
 308                 if (!searchParams.hasOwnProperty(prop))
 309                     searchParams[prop] = addParamsArr[prop];
 310             }
 311         }
 312
 313         var context = this;
 314         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 315         request.safeGet(
 316             searchParams,
 317             function(data) {
 318                 if ( data.getElementsByTagName("status")[0]
 319                         .childNodes[0].nodeValue == "OK" ) {
 320                     context.searchStatusOK = true;
 321                     //piggyback search
 322                     context.show(start, num, sort);
 323                     if (context.statCallback)
 324                         context.stat();
 325                     if (context.termlistCallback)
 326                         context.termlist();
 327                     if (context.bytargetCallback)
 328                         context.bytarget();
 329                 }
 330                 else
 331                     context.throwError('Search failed. Malformed WS resonse.',
 332                                         112);
 333             }
 334         );
 335     },
 336     stat: function()
 337     {
 338         if( !this.initStatusOK )
 339             throw new Error('Pz2.js: session not initialized.');
 340
 341         // if called explicitly takes precedence
 342         clearTimeout(this.statTimer);
 343
 344         var context = this;
 345         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 346         request.safeGet(
 347             { "command": "stat", "session": this.sessionID, "windowid" : this.windowid },
 348             function(data) {
 349                 if ( data.getElementsByTagName("stat") ) {
 350                     var activeClients =
 351                         Number( data.getElementsByTagName("activeclients")[0]
 352                                     .childNodes[0].nodeValue );
 353                     context.activeClients = activeClients;
 354
 355                     var stat = Element_parseChildNodes(data.documentElement);
 356
 357                     context.statCounter++;
 358                     var delay = context.statTime
 359                         + context.statCounter * context.dumpFactor;
 360
 361                     if ( activeClients > 0 )
 362                         context.statTimer =
 363                             setTimeout(
 364                                 function () {
 365                                     context.stat();
 366                                 },
 367                                 delay
 368                             );
 369                     context.statCallback(stat, this.windowid);
 370                 }
 371                 else
 372                     context.throwError('Stat failed. Malformed WS resonse.',
 373                                         113);
 374             }
 375         );
 376     },
 377     show: function(start, num, sort, query_state)
 378     {
 379         if( !this.searchStatusOK && this.useSessions )
 380             throw new Error(
 381                 'Pz2.js: show command has to be preceded with a search command.'
 382             );
 383
 384         // if called explicitly takes precedence
 385         clearTimeout(this.showTimer);
 386
 387         if( sort !== undefined )
 388             this.currentSort = sort;
 389         if( start !== undefined )
 390             this.currentStart = Number( start );
 391         if( num !== undefined )
 392             this.currentNum = Number( num );
 393
 394         var context = this;
 395         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 396         var requestParameters =
 397           {
 398               "command": "show",
 399               "session": this.sessionID,
 400               "start": this.currentStart,
 401               "num": this.currentNum,
 402               "sort": this.currentSort,
 403               "block": 1,
 404               "type": this.showResponseType,
 405               "windowid" : this.windowid
 406           };
 407         if (query_state)
 408           requestParameters["query-state"] = query_state;
 409         if (this.version && this.version > 0)
 410             requestParameters["version"] = this.version;
 411         request.safeGet(
 412           requestParameters,
 413           function(data, type) {
 414             var show = null;
 415             var activeClients = 0;
 416             if (type === "json") {
 417               show = {};
 418               activeClients = Number(data.activeclients[0]);
 419               show.activeclients = activeClients;
 420               show.merged = Number(data.merged[0]);
 421               show.total = Number(data.total[0]);
 422               show.start = Number(data.start[0]);
 423               show.num = Number(data.num[0]);
 424               show.hits = data.hit;
 425             } else if (data.getElementsByTagName("status")[0]
 426                   .childNodes[0].nodeValue == "OK") {
 427                 // first parse the status data send along with records
 428                 // this is strictly bound to the format
 429                 activeClients =
 430                   Number(data.getElementsByTagName("activeclients")[0]
 431                       .childNodes[0].nodeValue);
 432                 show = {
 433                   "activeclients": activeClients,
 434                   "merged":
 435                     Number( data.getElementsByTagName("merged")[0]
 436                         .childNodes[0].nodeValue ),
 437                   "total":
 438                     Number( data.getElementsByTagName("total")[0]
 439                         .childNodes[0].nodeValue ),
 440                   "start":
 441                     Number( data.getElementsByTagName("start")[0]
 442                         .childNodes[0].nodeValue ),
 443                   "num":
 444                     Number( data.getElementsByTagName("num")[0]
 445                         .childNodes[0].nodeValue ),
 446                   "hits": []
 447                 };
 448                 // parse all the first-level nodes for all <hit> tags
 449                 var hits = data.getElementsByTagName("hit");
 450                 for (i = 0; i < hits.length; i++)
 451                   show.hits[i] = Element_parseChildNodes(hits[i]);
 452             } else {
 453               context.throwError('Show failed. Malformed WS resonse.',
 454                   114);
 455             };
 456
 457             var approxNode = data.getElementsByTagName("approximation");
 458             if (approxNode && approxNode[0] && approxNode[0].childNodes[0] && approxNode[0].childNodes[0].nodeValue)
 459                 show['approximation'] =
 460                   Number( approxNode[0].childNodes[0].nodeValue);
 461
 462
 463               data.getElementsByTagName("")
 464             context.activeClients = activeClients;
 465             context.showCounter++;
 466             var delay = context.showTime;
 467             if (context.showCounter > context.showFastCount)
 468               delay += context.showCounter * context.dumpFactor;
 469             if ( activeClients > 0 )
 470               context.showTimer = setTimeout(
 471                 function () {
 472                   context.show();
 473                 },
 474                 delay);
 475               context.showCallback(show, this.windowid);
 476           }
 477         );
 478     },
 479     record: function(id, offset, syntax, handler)
 480     {
 481         // we may call record with no previous search if in proxy mode
 482         if(!this.searchStatusOK && this.useSessions)
 483            throw new Error(
 484             'Pz2.js: record command has to be preceded with a search command.'
 485             );
 486
 487         if( id !== undefined )
 488             this.currRecID = id;
 489
 490         var recordParams = {
 491             "command": "record",
 492             "session": this.sessionID,
 493             "id": this.currRecID,
 494             "windowid" : this.windowid
 495         };
 496
 497         this.currRecOffset = null;
 498         if (offset != undefined) {
 499             recordParams["offset"] = offset;
 500             this.currRecOffset = offset;
 501         }
 502
 503         if (syntax != undefined)
 504             recordParams['syntax'] = syntax;
 505
 506         //overwrite default callback id needed
 507         var callback = this.recordCallback;
 508         var args = undefined;
 509         if (handler != undefined) {
 510             callback = handler['callback'];
 511             args = handler['args'];
 512         }
 513
 514         var context = this;
 515         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 516
 517         request.safeGet(
 518             recordParams,
 519             function(data) {
 520                 var recordNode;
 521                 var record;
 522                 //raw record
 523                 if (context.currRecOffset !== null) {
 524                     record = new Array();
 525                     record['xmlDoc'] = data;
 526                     record['offset'] = context.currRecOffset;
 527                     callback(record, args, this.windowid);
 528                 //pz2 record
 529                 } else if ( recordNode =
 530                     data.getElementsByTagName("record")[0] ) {
 531                     // if stylesheet was fetched do not parse the response
 532                     if ( context.xslDoc ) {
 533                         record = new Array();
 534                         record['xmlDoc'] = data;
 535                         record['xslDoc'] = context.xslDoc;
 536                         record['recid'] =
 537                             recordNode.getElementsByTagName("recid")[0]
 538                                 .firstChild.nodeValue;
 539                     //parse record
 540                     } else {
 541                         record = Element_parseChildNodes(recordNode);
 542                     }
 543                     var activeClients =
 544                        Number( data.getElementsByTagName("activeclients")[0]
 545                                 .childNodes[0].nodeValue );
 546                     context.activeClients = activeClients;
 547                     context.recordCounter++;
 548                     var delay = context.recordTime + context.recordCounter * context.dumpFactor;
 549                     if ( activeClients > 0 )
 550                         context.recordTimer =
 551                            setTimeout (
 552                                function() {
 553                                   context.record(id, offset, syntax, handler);
 554                                   },
 555                                   delay
 556                                );
 557                     callback(record, args, this.windowid);
 558                 }
 559                 else
 560                     context.throwError('Record failed. Malformed WS resonse.',
 561                                         115);
 562             }
 563         );
 564     },
 565
 566     termlist: function()
 567     {
 568         if( !this.searchStatusOK && this.useSessions )
 569             throw new Error(
 570             'Pz2.js: termlist command has to be preceded with a search command.'
 571             );
 572
 573         // if called explicitly takes precedence
 574         clearTimeout(this.termTimer);
 575
 576         var context = this;
 577         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 578         request.safeGet(
 579             {
 580                 "command": "termlist",
 581                 "session": this.sessionID,
 582                 "name": this.termKeys,
 583                 "windowid" : this.windowid,
 584                 "version" : this.version
 585
 586             },
 587             function(data) {
 588                 if ( data.getElementsByTagName("termlist") ) {
 589                     var activeClients =
 590                         Number( data.getElementsByTagName("activeclients")[0]
 591                                     .childNodes[0].nodeValue );
 592                     context.activeClients = activeClients;
 593                     var termList = { "activeclients":  activeClients };
 594                     var termLists = data.getElementsByTagName("list");
 595                     //for each termlist
 596                     for (i = 0; i < termLists.length; i++) {
 597                         var listName = termLists[i].getAttribute('name');
 598                         termList[listName] = new Array();
 599                         var terms = termLists[i].getElementsByTagName('term');
 600                         //for each term in the list
 601                         for (j = 0; j < terms.length; j++) {
 602                             var term = {
 603                                 "name":
 604                                     (terms[j].getElementsByTagName("name")[0]
 605                                         .childNodes.length
 606                                     ? terms[j].getElementsByTagName("name")[0]
 607                                         .childNodes[0].nodeValue
 608                                     : 'ERROR'),
 609                                 "freq":
 610                                     terms[j]
 611                                     .getElementsByTagName("frequency")[0]
 612                                     .childNodes[0].nodeValue || 'ERROR'
 613                             };
 614
 615                             // Only for xtargets: id, records, filtered
 616                             var termIdNode =
 617                                 terms[j].getElementsByTagName("id");
 618                             if(terms[j].getElementsByTagName("id").length)
 619                                 term["id"] =
 620                                     termIdNode[0].childNodes[0].nodeValue;
 621                             termList[listName][j] = term;
 622
 623                             var recordsNode  = terms[j].getElementsByTagName("records");
 624                             if (recordsNode && recordsNode.length)
 625                                 term["records"] = recordsNode[0].childNodes[0].nodeValue;
 626
 627                             var filteredNode  = terms[j].getElementsByTagName("filtered");
 628                             if (filteredNode && filteredNode.length)
 629                                 term["filtered"] = filteredNode[0].childNodes[0].nodeValue;
 630
 631                         }
 632                     }
 633
 634                     context.termCounter++;
 635                     var delay = context.termTime
 636                         + context.termCounter * context.dumpFactor;
 637                     if ( activeClients > 0 )
 638                         context.termTimer =
 639                             setTimeout(
 640                                 function () {
 641                                     context.termlist();
 642                                 },
 643                                 delay
 644                             );
 645
 646                     context.termlistCallback(termList, this.windowid);
 647                 }
 648                 else
 649                     context.throwError('Termlist failed. Malformed WS resonse.',
 650                                         116);
 651             }
 652         );
 653
 654     },
 655     bytarget: function()
 656     {
 657         if( !this.initStatusOK && this.useSessions )
 658             throw new Error(
 659             'Pz2.js: bytarget command has to be preceded with a search command.'
 660             );
 661
 662         // no need to continue
 663         if( !this.searchStatusOK )
 664             return;
 665
 666         // if called explicitly takes precedence
 667         clearTimeout(this.bytargetTimer);
 668
 669         var context = this;
 670         var request = new pzHttpRequest(this.pz2String, this.errorHandler);
 671         request.safeGet(
 672             {
 673                 "command": "bytarget",
 674                 "session": this.sessionID,
 675                 "block": 1,
 676                 "windowid" : this.windowid,
 677                 "version" : this.version
 678             },
 679             function(data) {
 680                 if ( data.getElementsByTagName("status")[0]
 681                         .childNodes[0].nodeValue == "OK" ) {
 682                     var targetNodes = data.getElementsByTagName("target");
 683                     var bytarget = new Array();
 684                     for ( i = 0; i < targetNodes.length; i++) {
 685                         bytarget[i] = new Array();
 686                         for( j = 0; j < targetNodes[i].childNodes.length; j++ ) {
 687                             if ( targetNodes[i].childNodes[j].nodeType
 688                                 == Node.ELEMENT_NODE ) {
 689                                 var nodeName =
 690                                     targetNodes[i].childNodes[j].nodeName;
 691                                 if (targetNodes[i].childNodes[j].firstChild != null)
 692                                 {
 693                                     var nodeText = targetNodes[i].childNodes[j]
 694                                         .firstChild.nodeValue;
 695                                     bytarget[i][nodeName] = nodeText;
 696                                 }
 697                                 else {
 698                                     bytarget[i][nodeName] = "";
 699                                 }
 700
 701
 702                             }
 703                         }
 704                         if (bytarget[i]["state"]=="Client_Disconnected") {
 705                           bytarget[i]["hits"] = "Error";
 706                         } else if (bytarget[i]["state"]=="Client_Error") {
 707                           bytarget[i]["hits"] = "Error";
 708                         } else if (bytarget[i]["state"]=="Client_Working") {
 709                           bytarget[i]["hits"] = "...";
 710                         }
 711                         if (bytarget[i].diagnostic == "1") {
 712                           bytarget[i].diagnostic = "Permanent system error";
 713                         } else if (bytarget[i].diagnostic == "2") {
 714                           bytarget[i].diagnostic = "Temporary system error";
 715                         }
 716                         var targetsSuggestions = targetNodes[i].getElementsByTagName("suggestions");
 717                         if (targetsSuggestions != undefined && targetsSuggestions.length>0) {
 718                           var suggestions = targetsSuggestions[0];
 719                           bytarget[i]["suggestions"] = Element_parseChildNodes(suggestions);
 720                         }
 721                     }
 722
 723                     context.bytargetCounter++;
 724                     var delay = context.bytargetTime
 725                         + context.bytargetCounter * context.dumpFactor;
 726                     if ( context.activeClients > 0 )
 727                         context.bytargetTimer =
 728                             setTimeout(
 729                                 function () {
 730                                     context.bytarget();
 731                                 },
 732                                 delay
 733                             );
 734
 735                     context.bytargetCallback(bytarget, this.windowid);
 736                 }
 737                 else
 738                     context.throwError('Bytarget failed. Malformed WS resonse.',
 739                                         117);
 740             }
 741         );
 742     },
 743
 744     // just for testing, probably shouldn't be here
 745     showNext: function(page)
 746     {
 747         var step = page || 1;
 748         this.show( ( step * this.currentNum ) + this.currentStart );
 749     },
 750
 751     showPrev: function(page)
 752     {
 753         if (this.currentStart == 0 )
 754             return false;
 755         var step = page || 1;
 756         var newStart = this.currentStart - (step * this.currentNum );
 757         this.show( newStart > 0 ? newStart : 0 );
 758     },
 759
 760     showPage: function(pageNum)
 761     {
 762         //var page = pageNum || 1;
 763         this.show(pageNum * this.currentNum);
 764     }
 765 };
 766
 767 /*
 768 ********************************************************************************
 769 ** AJAX HELPER CLASS ***********************************************************
 770 ********************************************************************************
 771 */
 772 var pzHttpRequest = function (url, errorHandler, cookieDomain) {
 773         this.maxUrlLength = 2048;
 774         this.request = null;
 775         this.url = url;
 776         this.errorHandler = errorHandler || null;
 777         this.async = true;
 778         this.requestHeaders = {};
 779         this.isXDR = false;
 780         this.domainRegex = /https?:\/\/([^:/]+).*/;
 781         this.cookieDomain = cookieDomain || null;
 782
 783         var xhr = new XMLHttpRequest();
 784         var domain = this._getDomainFromUrl(url);
 785         if ("withCredentials" in xhr) {
 786           // XHR for Chrome/Firefox/Opera/Safari.
 787         } else if (domain && this._isCrossDomain(domain) &&
 788             typeof XDomainRequest != "undefined") {
 789           // use XDR (IE7/8) when no other way
 790           xhr = new XDomainRequest();
 791           this.isXDR = true;
 792         } else {
 793           // CORS not supported.
 794         }
 795         this.request = xhr;
 796 };
 797
 798
 799 pzHttpRequest.prototype =
 800 {
 801     safeGet: function ( params, callback )
 802     {
 803         var encodedParams =  this.encodeParams(params);
 804         var url = this._urlAppendParams(encodedParams);
 805         if (url.length >= this.maxUrlLength) {
 806             this.requestHeaders["Content-Type"]
 807                 = "application/x-www-form-urlencoded";
 808             this._send( 'POST', this.url, encodedParams, callback );
 809         } else {
 810             this._send( 'GET', url, '', callback );
 811         }
 812     },
 813
 814     get: function ( params, callback )
 815     {
 816         this._send( 'GET', this._urlAppendParams(this.encodeParams(params)),
 817             '', callback );
 818     },
 819
 820     post: function ( params, data, callback )
 821     {
 822         this._send( 'POST', this._urlAppendParams(this.encodeParams(params)),
 823             data, callback );
 824     },
 825
 826     load: function ()
 827     {
 828         this.async = false;
 829         this.request.open( 'GET', this.url, this.async );
 830         this.request.send('');
 831         if ( this.request.status == 200 )
 832             return this.request.responseXML;
 833     },
 834
 835     encodeParams: function (params)
 836     {
 837         var sep = "";
 838         var encoded = "";
 839         for (var key in params) {
 840             if (params[key] != null) {
 841                 encoded += sep + key + '=' + encodeURIComponent(params[key]);
 842                 sep = '&';
 843             }
 844         }
 845         return encoded;
 846     },
 847
 848     _getDomainFromUrl: function (url)
 849     {
 850       if (this.cookieDomain) return this.cookieDomain; //explicit cookie domain
 851       var m = this.domainRegex.exec(url);
 852       return (m && m.length > 1) ? m[1] : null;
 853     },
 854
 855     _strEndsWith: function (str, suffix)
 856     {
 857       return str.indexOf(suffix, str.length - suffix.length) !== -1;
 858     },
 859
 860     _isCrossDomain: function (domain)
 861     {
 862       if (this.cookieDomain) return true; //assume xdomain is cookie domain set
 863       return !this._strEndsWith(domain, document.domain);
 864     },
 865
 866     getCookie: function (sKey) {
 867       return decodeURI(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*"
 868         + encodeURI(sKey).replace(/[\-\.\+\*]/g, "\\$&")
 869         + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null;
 870     },
 871
 872     setCookie: function (sKey, sValue, vEnd, sPath, sDomain, bSecure) {
 873       if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) {
 874         return false;
 875       }
 876       var sExpires = "";
 877       if (vEnd) {
 878         switch (vEnd.constructor) {
 879           case Number:
 880             sExpires = vEnd === Infinity
 881               ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT"
 882               : "; max-age=" + vEnd;
 883             break;
 884           case String:
 885             sExpires = "; expires=" + vEnd;
 886             break;
 887           case Date:
 888             sExpires = "; expires=" + vEnd.toGMTString();
 889             break;
 890         }
 891       }
 892       document.cookie = encodeURI(sKey) + "=" + encodeURI(sValue)
 893         + sExpires
 894         + (sDomain ? "; domain=" + sDomain : "")
 895         + (sPath ? "; path=" + sPath : "")
 896         + (bSecure ? "; secure" : "");
 897       return true;
 898     },
 899
 900     _send: function ( type, url, data, callback)
 901     {
 902         var context = this;
 903         this.callback = callback;
 904         this.async = true;
 905         //we never do withCredentials, so if it's CORS and we have
 906         //session cookie, resend it
 907         var domain = this._getDomainFromUrl(url);
 908         if (domain && this._isCrossDomain(domain) &&
 909             this.getCookie(domain+":SESSID")) {
 910           //rewrite the URL
 911           var sessparam = ';jsessionid=' + this.getCookie(domain+":SESSID");
 912           var q = url.indexOf('?');
 913           if (q == -1) {
 914             url += sessparam;
 915           } else {
 916             url = url.substring(0, q) + sessparam + url.substring(q);
 917           }
 918         }
 919         this.request.open( type, url, this.async );
 920         if (!this.isXDR) {
 921           //setting headers is only allowed with XHR
 922           for (var key in this.requestHeaders)
 923             this.request.setRequestHeader(key, this.requestHeaders[key]);
 924         }
 925         if (this.isXDR) {
 926           this.request.onload = function () {
 927             //fake XHR props
 928             context.request.status = 200;
 929             context.request.readyState = 4;
 930             //handle
 931             context._handleResponse(url);
 932           }
 933           this.request.onerror = function () {
 934             //fake XHR props
 935             context.request.status = 417; //not really, but what can we do
 936             context.request.readyState = 4;
 937             //handle
 938             context._handleResponse(url);
 939           }
 940         } else {
 941           this.request.onreadystatechange = function () {
 942             context._handleResponse(url); /// url used ONLY for error reporting
 943           }
 944         }
 945         this.request.send(data);
 946     },
 947
 948     _urlAppendParams: function (encodedParams)
 949     {
 950         if (encodedParams)
 951             return this.url + "?" + encodedParams;
 952         else
 953             return this.url;
 954     },
 955
 956     _handleResponse: function (requestUrl)
 957     {
 958         if ( this.request.readyState == 4 ) {
 959             // pick up appplication errors first
 960             var errNode = null;
 961             // xdomainreq does not have responseXML
 962             if (this.isXDR) {
 963               if (this.request.contentType.match(/\/xml/)){
 964                 var dom = new ActiveXObject('Microsoft.XMLDOM');
 965                 dom.async = false;
 966                 dom.loadXML(this.request.responseText);
 967                 this.request.responseXML = dom;
 968               } else {
 969                 this.request.responseXML = null;
 970               }
 971             }
 972             if (this.request.responseXML &&
 973                 (errNode = this.request.responseXML.documentElement)
 974                 && errNode.nodeName == 'error') {
 975                 var errMsg = errNode.getAttribute("msg");
 976                 var errCode = errNode.getAttribute("code");
 977                 var errAddInfo = '';
 978                 if (errNode.childNodes.length)
 979                     errAddInfo = ': ' + errNode.childNodes[0].nodeValue;
 980
 981                 var err = new Error(errMsg + errAddInfo);
 982                 err.code = errCode;
 983
 984                 if (this.errorHandler) {
 985                     this.errorHandler(err);
 986                 }
 987                 else {
 988                     throw err;
 989                 }
 990             }
 991             else if (this.request.status == 200 &&
 992                      this.request.responseXML === null) {
 993               if (this.request.responseText !== null) {
 994                 //assume JSON
 995                         var json = null;
 996                         var text = this.request.responseText;
 997                         if (typeof window.JSON == "undefined") {
 998                           json = eval("(" + text + ")");
 999                 } else {
1000                           try {
1001                             json = JSON.parse(text);
1002                           } catch (e) {
1003                   }
1004                         }
1005                         this.callback(json, "json");
1006               } else {
1007                 var err = new Error("XML/Text response is empty but no error " +
1008                                     "for " + requestUrl);
1009                 err.code = -1;
1010                 if (this.errorHandler) {
1011                     this.errorHandler(err);
1012                 } else {
1013                     throw err;
1014                 }
1015               }
1016             } else if (this.request.status == 200) {
1017                 //set cookie manually only if cross-domain
1018                 var domain = this._getDomainFromUrl(requestUrl);
1019                 if (domain && this._isCrossDomain(domain)) {
1020                   var jsessionId = this.request.responseXML
1021                     .documentElement.getAttribute('jsessionId');
1022                   if (jsessionId)
1023                     this.setCookie(domain+":SESSID", jsessionId);
1024                 }
1025                 this.callback(this.request.responseXML);
1026             } else {
1027                 var err = new Error("HTTP response not OK: "
1028                             + this.request.status + " - "
1029                             + this.request.statusText );
1030                 err.code = '00' + this.request.status;
1031                 if (this.errorHandler) {
1032                     this.errorHandler(err);
1033                 }
1034                 else {
1035                     throw err;
1036                 }
1037             }
1038         }
1039     }
1040 };
1041
1042 /*
1043 ********************************************************************************
1044 ** XML HELPER FUNCTIONS ********************************************************
1045 ********************************************************************************
1046 */
1047
1048 // DOMDocument
1049
1050 if ( window.ActiveXObject) {
1051     var DOMDoc = document;
1052 } else {
1053     var DOMDoc = Document.prototype;
1054 }
1055
1056 DOMDoc.newXmlDoc = function ( root )
1057 {
1058     var doc;
1059
1060     if (document.implementation && document.implementation.createDocument) {
1061         doc = document.implementation.createDocument('', root, null);
1062     } else if ( window.ActiveXObject ) {
1063         doc = new ActiveXObject("MSXML2.DOMDocument");
1064         doc.loadXML('<' + root + '/>');
1065     } else {
1066         throw new Error ('No XML support in this browser');
1067     }
1068
1069     return doc;
1070 }
1071
1072
1073 DOMDoc.parseXmlFromString = function ( xmlString )
1074 {
1075     var doc;
1076
1077     if ( window.DOMParser ) {
1078         var parser = new DOMParser();
1079         doc = parser.parseFromString( xmlString, "text/xml");
1080     } else if ( window.ActiveXObject ) {
1081         doc = new ActiveXObject("MSXML2.DOMDocument");
1082         doc.loadXML( xmlString );
1083     } else {
1084         throw new Error ("No XML parsing support in this browser.");
1085     }
1086
1087     return doc;
1088 }
1089
1090 DOMDoc.transformToDoc = function (xmlDoc, xslDoc)
1091 {
1092     if ( window.XSLTProcessor ) {
1093         var proc = new XSLTProcessor();
1094         proc.importStylesheet( xslDoc );
1095         return proc.transformToDocument(xmlDoc);
1096     } else if ( window.ActiveXObject ) {
1097         return document.parseXmlFromString(xmlDoc.transformNode(xslDoc));
1098     } else {
1099         alert( 'Unable to perform XSLT transformation in this browser' );
1100     }
1101 }
1102
1103 // DOMElement
1104
1105 Element_removeFromDoc = function (DOM_Element)
1106 {
1107     DOM_Element.parentNode.removeChild(DOM_Element);
1108 }
1109
1110 Element_emptyChildren = function (DOM_Element)
1111 {
1112     while( DOM_Element.firstChild ) {
1113         DOM_Element.removeChild( DOM_Element.firstChild )
1114     }
1115 }
1116
1117 Element_appendTransformResult = function ( DOM_Element, xmlDoc, xslDoc )
1118 {
1119     if ( window.XSLTProcessor ) {
1120         var proc = new XSLTProcessor();
1121         proc.importStylesheet( xslDoc );
1122         var docFrag = false;
1123         docFrag = proc.transformToFragment( xmlDoc, DOM_Element.ownerDocument );
1124         DOM_Element.appendChild(docFrag);
1125     } else if ( window.ActiveXObject ) {
1126         DOM_Element.innerHTML = xmlDoc.transformNode( xslDoc );
1127     } else {
1128         alert( 'Unable to perform XSLT transformation in this browser' );
1129     }
1130 }
1131
1132 Element_appendTextNode = function (DOM_Element, tagName, textContent )
1133 {
1134     var node = DOM_Element.ownerDocument.createElement(tagName);
1135     var text = DOM_Element.ownerDocument.createTextNode(textContent);
1136
1137     DOM_Element.appendChild(node);
1138     node.appendChild(text);
1139
1140     return node;
1141 }
1142
1143 Element_setTextContent = function ( DOM_Element, textContent )
1144 {
1145     if (typeof DOM_Element.textContent !== "undefined") {
1146         DOM_Element.textContent = textContent;
1147     } else if (typeof DOM_Element.innerText !== "undefined" ) {
1148         DOM_Element.innerText = textContent;
1149     } else {
1150         throw new Error("Cannot set text content of the node, no such method.");
1151     }
1152 }
1153
1154 Element_getTextContent = function (DOM_Element)
1155 {
1156     if ( typeof DOM_Element.textContent != 'undefined' ) {
1157         return DOM_Element.textContent;
1158     } else if (typeof DOM_Element.text != 'undefined') {
1159         return DOM_Element.text;
1160     } else {
1161         throw new Error("Cannot get text content of the node, no such method.");
1162     }
1163 }
1164
1165 Element_parseChildNodes = function (node)
1166 {
1167     var parsed = {};
1168     var hasChildElems = false;
1169     var textContent = '';
1170
1171     if (node.hasChildNodes()) {
1172         var children = node.childNodes;
1173         for (var i = 0; i < children.length; i++) {
1174             var child = children[i];
1175             switch (child.nodeType) {
1176               case Node.ELEMENT_NODE:
1177                 hasChildElems = true;
1178                 var nodeName = child.nodeName;
1179                 if (!(nodeName in parsed))
1180                     parsed[nodeName] = [];
1181                 parsed[nodeName].push(Element_parseChildNodes(child));
1182                 break;
1183               case Node.TEXT_NODE:
1184                 textContent += child.nodeValue;
1185                 break;
1186               case Node.CDATA_SECTION_NODE:
1187                 textContent += child.nodeValue;
1188                 break;
1189             }
1190         }
1191     }
1192
1193     var attrs = node.attributes;
1194     for (var i = 0; i < attrs.length; i++) {
1195         hasChildElems = true;
1196         var attrName = '@' + attrs[i].nodeName;
1197         var attrValue = attrs[i].nodeValue;
1198         parsed[attrName] = attrValue;
1199     }
1200
1201     // if no nested elements/attrs set value to text
1202     if (hasChildElems)
1203       parsed['#text'] = textContent;
1204     else
1205       parsed = textContent;
1206
1207     return parsed;
1208 }
1209
1210 /* do not remove trailing bracket */
1211 }