js/pz2.js

   1 /*
   2 ** $Id: pz2.js,v 1.32 2007-06-04 12:49:21 jakub Exp $
   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     //for convenience
  29     __myself = this;
  30
  31     //supported pazpar2's protocol version
  32     __myself.suppProtoVer = '1';
  33     __myself.pz2String = "search.pz2";
  34     __myself.stylesheet = paramArray.detailstylesheet || null;
  35
  36     //load stylesheet if required in async mode
  37     if( __myself.stylesheet ) {
  38         var request = new pzHttpRequest( __myself.stylesheet );
  39         request.get(
  40                 {},
  41                 function ( doc ) {
  42                     __myself.xslDoc = doc;
  43                 }
  44         );
  45     }
  46
  47     // at least one callback required
  48     if ( !paramArray )
  49         throw new Error("An array with parameters has to be suplied when instantiating a class");
  50
  51     __myself.errorHandler = paramArray.errorhandler || null;
  52
  53     // function callbacks
  54     __myself.statCallback = paramArray.onstat || null;
  55     __myself.showCallback = paramArray.onshow || null;
  56     __myself.termlistCallback = paramArray.onterm || null;
  57     __myself.recordCallback = paramArray.onrecord || null;
  58     __myself.bytargetCallback = paramArray.onbytarget || null;
  59     __myself.resetCallback = paramArray.onreset || null;
  60
  61     // termlist keys
  62     __myself.termKeys = paramArray.termlist || "subject";
  63
  64     // some configurational stuff
  65     __myself.keepAlive = 50000;
  66
  67     __myself.sessionID = null;
  68     __myself.initStatusOK = false;
  69     __myself.pingStatusOK = false;
  70     __myself.searchStatusOK = false;
  71
  72     if ( paramArray.keepAlive < __myself.keepAlive )
  73         __myself.keepAlive = paramArray.keepAlive;
  74
  75     // for sorting
  76     __myself.currentSort = "relevance";
  77     // where are we?
  78     __myself.currentStart = 0;
  79     __myself.currentNum = 20;
  80
  81     // last full record retrieved
  82     __myself.currRecID = null;
  83     // current query
  84     __myself.currQuery = null;
  85
  86     //timers
  87     __myself.statTime = paramArray.stattime || 1000;
  88     __myself.statTimer = null;
  89     __myself.termTime = paramArray.termtime || 1000;
  90     __myself.termTimer = null;
  91     __myself.showTime = paramArray.showtime || 1000;
  92     __myself.showTimer = null;
  93     __myself.showFastCount = 4;
  94     __myself.bytargetTime = paramArray.bytargettime || 1000;
  95     __myself.bytargetTimer = null;
  96
  97     // counters for each command and applied delay
  98     __myself.dumpFactor = 500;
  99     __myself.showCounter = 0;
 100     __myself.termCounter = 0;
 101     __myself.statCounter = 0;
 102     __myself.bytargetCounter = 0;
 103
 104     // active clients, updated by stat and show
 105     // might be an issue since bytarget will poll accordingly
 106     __myself.activeClients = 1;
 107
 108     // auto init session?
 109     if (paramArray.autoInit !== false)
 110         __myself.init();
 111 };
 112 pz2.prototype = {
 113     reset: function ()
 114     {
 115         __myself.sessionID = null;
 116         __myself.initStatusOK = false;
 117         __myself.pingStatusOK = false;
 118         __myself.searchStatusOK = false;
 119
 120         clearTimeout(__myself.statTimer);
 121         clearTimeout(__myself.showTimer);
 122         clearTimeout(__myself.termTimer);
 123         clearTimeout(__myself.bytargetTimer);
 124
 125         if ( __myself.resetCallback )
 126                 __myself.resetCallback();
 127     },
 128     init: function ( sessionId )
 129     {
 130         __myself.reset();
 131         if ( sessionId != undefined ) {
 132             __myself.initStatusOK = true;
 133             __myself.sessionID = sessionId;
 134             __myself.ping();
 135
 136         } else {
 137             var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 138             request.get(
 139                 { "command": "init" },
 140                 function(data) {
 141                     if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 142                         if ( data.getElementsByTagName("protocol")[0].childNodes[0].nodeValue != __myself.suppProtoVer )
 143                             throw new Error("Server's protocol not supported by the client");
 144                         __myself.initStatusOK = true;
 145                         __myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
 146                         setTimeout("__myself.ping()", __myself.keepAlive);
 147                     }
 148                     else
 149                         // if it gets here the http return code was 200 (pz2 errors are 417)
 150                         // but the response was invalid, it should never occur
 151                         setTimeout("__myself.init()", 1000);
 152                 }
 153             );
 154         }
 155     },
 156     // no need to ping explicitly
 157     ping: function ()
 158     {
 159         if( !__myself.initStatusOK )
 160             return;
 161             // session is not initialized code here
 162         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 163         request.get(
 164             { "command": "ping", "session": __myself.sessionID },
 165             function(data) {
 166                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 167                     __myself.pingStatusOK = true;
 168                     setTimeout("__myself.ping()", __myself.keepAlive);
 169                 }
 170                 else
 171                     // if it gets here the http return code was 200 (pz2 errors are 417)
 172                     // but the response was invalid, it should never occur
 173                     setTimeout("__myself.ping()", 1000);
 174             }
 175         );
 176     },
 177     search: function (query, num, sort, filter)
 178     {
 179         clearTimeout(__myself.statTimer);
 180         clearTimeout(__myself.showTimer);
 181         clearTimeout(__myself.termTimer);
 182         clearTimeout(__myself.bytargetTimer);
 183
 184         __myself.showCounter = 0;
 185         __myself.termCounter = 0;
 186         __myself.bytargetCounter = 0;
 187         __myself.statCounter = 0;
 188
 189         if( !__myself.initStatusOK )
 190             return;
 191
 192         if( query !== undefined )
 193             __myself.currQuery = query;
 194         else
 195             throw new Error("You need to supply query to the search command");
 196
 197         if( filter !== undefined )
 198             var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery, "filter": filter };
 199         else
 200             var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery };
 201         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 202         request.get(
 203             searchParams,
 204             function(data) {
 205                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 206                     __myself.searchStatusOK = true;
 207                     //piggyback search
 208                     __myself.show(0, num, sort);
 209                     if ( __myself.statCallback )
 210                         __myself.stat();
 211                         //__myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
 212                     if ( __myself.termlistCallback )
 213                         __myself.termlist();
 214                         //__myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
 215                     if ( __myself.bytargetCallback )
 216                         __myself.bytarget();
 217                         //__myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
 218                 }
 219                 else
 220                     // if it gets here the http return code was 200 (pz2 errors are 417)
 221                     // but the response was invalid, it should never occur
 222                     setTimeout("__myself.search(__myself.currQuery)", 500);
 223             }
 224         );
 225     },
 226     stat: function()
 227     {
 228         if( !__myself.initStatusOK )
 229             return;
 230         // if called explicitly takes precedence
 231         clearTimeout(__myself.statTimer);
 232         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 233         request.get(
 234             { "command": "stat", "session": __myself.sessionID },
 235             function(data) {
 236                 if ( data.getElementsByTagName("stat") ) {
 237                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 238                     __myself.activeClients = activeClients;
 239                     var stat = {
 240                     "activeclients": activeClients,
 241                     "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
 242                     "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
 243                     "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
 244                     "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
 245                     "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
 246                     "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
 247                     "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
 248                     "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
 249                     "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
 250                     };
 251
 252                     __myself.statCounter++;
 253                     var delay = __myself.statTime + __myself.statCounter * __myself.dumpFactor;
 254                     if ( activeClients > 0 )
 255                         __myself.statTimer = setTimeout("__myself.stat()", delay);
 256
 257                     __myself.statCallback(stat);
 258                 }
 259                 else
 260                     // if it gets here the http return code was 200 (pz2 errors are 417)
 261                     // but the response was invalid, it should never occur
 262                     __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
 263             }
 264         );
 265     },
 266     show: function(start, num, sort)
 267     {
 268         if( !__myself.searchStatusOK )
 269             return;
 270         // if called explicitly takes precedence
 271         clearTimeout(__myself.showTimer);
 272
 273         if( sort !== undefined )
 274             __myself.currentSort = sort;
 275         if( start !== undefined )
 276             __myself.currentStart = Number( start );
 277         if( num !== undefined )
 278             __myself.currentNum = Number( num );
 279         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 280         var context = this;
 281         request.get(
 282             { "command": "show", "session": __myself.sessionID, "start": __myself.currentStart,
 283               "num": __myself.currentNum, "sort": __myself.currentSort, "block": 1 },
 284             function(data) {
 285                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 286                     // first parse the status data send along with records
 287                     // this is strictly bound to the format
 288                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 289                     __myself.activeClients = activeClients;
 290                     var show = {
 291                     "activeclients": activeClients,
 292                     "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
 293                     "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
 294                     "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
 295                     "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue ),
 296                     "hits": []
 297                     };
 298                     // parse all the first-level nodes for all <hit> tags
 299                     var hits = data.getElementsByTagName("hit");
 300                     var hit = new Array();
 301                     for (i = 0; i < hits.length; i++) {
 302                         show.hits[i] = new Array();
 303                         show.hits[i]['location'] = new Array();
 304                         for ( j = 0; j < hits[i].childNodes.length; j++) {
 305                             var locCount = 0;
 306                             if ( hits[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 307                                 if (hits[i].childNodes[j].nodeName == 'location') {
 308                                     var locNode = hits[i].childNodes[j];
 309                                     var id = locNode.getAttribute('id');
 310                                     show.hits[i]['location'][id] = {
 311                                         "id": locNode.getAttribute("id"),
 312                                         "name": locNode.getAttribute("name")
 313                                     };
 314                                 }
 315                                 else {
 316                                     var nodeName = hits[i].childNodes[j].nodeName;
 317                                     var nodeText = 'ERROR'
 318                                     if ( hits[i].childNodes[j].firstChild )
 319                                         nodeText = hits[i].childNodes[j].firstChild.nodeValue;
 320                                     show.hits[i][nodeName] = nodeText;
 321                                 }
 322                             }
 323                         }
 324                     }
 325                     __myself.showCounter++;
 326                     var delay = __myself.showTime;
 327                     if (__myself.showCounter > __myself.showFastCount)
 328                             delay += __myself.showCounter * __myself.dumpFactor;
 329                     if ( activeClients > 0 )
 330                         __myself.showTimer = setTimeout("__myself.show()", delay);
 331
 332                     __myself.showCallback(show);
 333                 }
 334                 else
 335                     // if it gets here the http return code was 200 (pz2 errors are 417)
 336                     // but the response was invalid, it should never occur
 337                     __myself.showTimer = setTimeout("__myself.show()", __myself.showTime / 4);
 338             }
 339         );
 340     },
 341     record: function(id)
 342     {
 343         if( !__myself.searchStatusOK )
 344             return;
 345
 346         if( id !== undefined )
 347             __myself.currRecID = id;
 348         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 349         request.get(
 350             { "command": "record", "session": __myself.sessionID, "id": __myself.currRecID },
 351             function(data) {
 352                 var recordNode;
 353                 var record = new Array();
 354                 if ( recordNode = data.getElementsByTagName("record")[0] ) {
 355                     // if stylesheet was fetched do not parse the response
 356                     if ( __myself.xslDoc ) {
 357                         record['recid'] = recordNode.getElementsByTagName("recid")[0].firstChild.nodeValue;
 358                         record['xmlDoc'] = data;
 359                         record['xslDoc'] = __myself.xslDoc;
 360                     } else {
 361                         for ( i = 0; i < recordNode.childNodes.length; i++) {
 362                             if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE
 363                                     && recordNode.childNodes[i].nodeName != 'location' ) {
 364                                 var nodeName = recordNode.childNodes[i].nodeName;
 365                                 var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
 366                                 record[nodeName] = nodeText;
 367                             }
 368                         }
 369                         // the location might be empty!!
 370                         var locationNodes = recordNode.getElementsByTagName("location");
 371                         record["location"] = new Array();
 372                         for ( i = 0; i < locationNodes.length; i++ ) {
 373                             record["location"][i] = {
 374                                 "id": locationNodes[i].getAttribute("id"),
 375                                 "name": locationNodes[i].getAttribute("name")
 376                             };
 377
 378                             for ( j = 0; j < locationNodes[i].childNodes.length; j++) {
 379                                 if ( locationNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 380                                     var nodeName = locationNodes[i].childNodes[j].nodeName;
 381                                     var nodeText = '';
 382                                     if (locationNodes[i].childNodes[j].firstChild)
 383                                             nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
 384                                     record["location"][i][nodeName] = nodeText;
 385                                 }
 386                             }
 387                         }
 388                     }
 389
 390                     __myself.recordCallback(record);
 391                 }
 392                 else
 393                     // if it gets here the http return code was 200 (pz2 errors are 417)
 394                     // but the response was invalid, it should never occur
 395                     setTimeout("__myself.record(__myself.currRecID)", 500);
 396             }
 397         );
 398     },
 399     termlist: function()
 400     {
 401         if( !__myself.searchStatusOK )
 402             return;
 403         // if called explicitly takes precedence
 404         clearTimeout(__myself.termTimer);
 405         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 406         request.get(
 407             { "command": "termlist", "session": __myself.sessionID, "name": __myself.termKeys },
 408             function(data) {
 409                 if ( data.getElementsByTagName("termlist") ) {
 410                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 411                     __myself.activeClients = activeClients;
 412                     var termList = { "activeclients":  activeClients };
 413                     var termLists = data.getElementsByTagName("list");
 414                     //for each termlist
 415                     for (i = 0; i < termLists.length; i++) {
 416                         var listName = termLists[i].getAttribute('name');
 417                         termList[listName] = new Array();
 418                         var terms = termLists[i].getElementsByTagName('term');
 419                         //for each term in the list
 420                         for (j = 0; j < terms.length; j++) {
 421                             var term = {
 422                                 "name": (terms[j].getElementsByTagName("name")[0].childNodes.length
 423                                                 ? terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue
 424                                                 : 'ERROR'),
 425                                 "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue || 'ERROR'
 426                             };
 427
 428                             var termIdNode = terms[j].getElementsByTagName("id");
 429                             if(terms[j].getElementsByTagName("id").length)
 430                                 term["id"] = termIdNode[0].childNodes[0].nodeValue;
 431
 432                             termList[listName][j] = term;
 433                         }
 434                     }
 435
 436                     __myself.termCounter++;
 437                     var delay = __myself.termTime + __myself.termCounter * __myself.dumpFactor;
 438                     if ( activeClients > 0 )
 439                         __myself.termTimer = setTimeout("__myself.termlist()", delay);
 440
 441                    __myself.termlistCallback(termList);
 442                 }
 443                 else
 444                     // if it gets here the http return code was 200 (pz2 errors are 417)
 445                     // but the response was invalid, it should never occur
 446                     __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
 447             }
 448         );
 449
 450     },
 451     bytarget: function()
 452     {
 453         if( !__myself.searchStatusOK )
 454             return;
 455         // if called explicitly takes precedence
 456         clearTimeout(__myself.bytargetTimer);
 457         var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
 458         request.get(
 459             { "command": "bytarget", "session": __myself.sessionID },
 460             function(data) {
 461                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 462                     var targetNodes = data.getElementsByTagName("target");
 463                     var bytarget = new Array();
 464                     for ( i = 0; i < targetNodes.length; i++) {
 465                         bytarget[i] = new Array();
 466                         for( j = 0; j < targetNodes[i].childNodes.length; j++ ) {
 467                             if ( targetNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 468                                 var nodeName = targetNodes[i].childNodes[j].nodeName;
 469                                 var nodeText = targetNodes[i].childNodes[j].firstChild.nodeValue;
 470                                 bytarget[i][nodeName] = nodeText;
 471                             }
 472                         }
 473                     }
 474
 475                     __myself.bytargetCounter++;
 476                     var delay = __myself.bytargetTime + __myself.bytargetCounter * __myself.dumpFactor;
 477                     if ( __myself.activeClients > 0 )
 478                         __myself.bytargetTimer = setTimeout("__myself.bytarget()", delay);
 479
 480                     __myself.bytargetCallback(bytarget);
 481                 }
 482                 else
 483                     // if it gets here the http return code was 200 (pz2 errors are 417)
 484                     // but the response was invalid, it should never occur
 485                     __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
 486             }
 487         );
 488     },
 489     // just for testing, probably shouldn't be here
 490     showNext: function(page)
 491     {
 492         var step = page || 1;
 493         __myself.show( ( step * __myself.currentNum ) + __myself.currentStart );
 494     },
 495     showPrev: function(page)
 496     {
 497         if (__myself.currentStart == 0 )
 498             return false;
 499         var step = page || 1;
 500         var newStart = __myself.currentStart - (step * __myself.currentNum );
 501         __myself.show( newStart > 0 ? newStart : 0 );
 502     },
 503     showPage: function(pageNum)
 504     {
 505         //var page = pageNum || 1;
 506         __myself.show(pageNum * __myself.currentNum);
 507     }
 508 };
 509
 510 /*
 511 *********************************************************************************
 512 ** AJAX HELPER CLASS ************************************************************
 513 *********************************************************************************
 514 */
 515 var pzHttpRequest = function ( url, errorHandler ) {
 516         this.request = null;
 517         this.url = url;
 518         this.errorHandler = errorHandler || null;
 519
 520         if ( window.XMLHttpRequest ) {
 521             this.request = new XMLHttpRequest();
 522         } else if ( window.ActiveXObject ) {
 523             try {
 524                 this.request = new ActiveXObject( 'Msxml2.XMLHTTP' );
 525             } catch (err) {
 526                 this.request = new ActiveXObject( 'Microsoft.XMLHTTP' );
 527             }
 528         }
 529 };
 530
 531 pzHttpRequest.prototype =
 532 {
 533     get: function ( params, callback )
 534     {
 535         this.callback = callback;
 536
 537         var getUrl = this.url;
 538         var paramArr = new Array();
 539
 540         for ( var key in params ) {
 541             paramArr.push(key + '=' + encodeURI(params[key]) );
 542         }
 543
 544         if ( paramArr.length )
 545             getUrl += '?' + paramArr.join('&');
 546
 547         var context = this;
 548         this.request.open( 'GET', getUrl, true );
 549         this.request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
 550         //this.request.setRequestHeader('Accept-Charset', 'UTF-8');
 551         this.request.onreadystatechange = function () {
 552             context._handleResponse();
 553         }
 554         this.request.send(null);
 555     },
 556
 557     _handleResponse: function ()
 558     {
 559         if ( this.request.readyState == 4 ) {
 560             if ( this.request.status == 200 ) {
 561                 this.callback( this.request.responseXML );
 562             }
 563             // pz errors
 564             else if ( this.request.status == 417 ) {
 565                 var errMsg = this.request.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue;
 566                 var errCode = this.request.responseXML.getElementsByTagName("error")[0].getAttribute("code");
 567
 568                 var err = new Error(errMsg);
 569                 err.code = errCode;
 570
 571                 if (this.errorHandler) {
 572                     this.errorHandler(err);
 573                 }
 574                 else {
 575                     throw err;
 576                 }
 577             }
 578             else {
 579                 var err = new Error("XMLHttpRequest error. STATUS: "
 580                             + this.request.status + " STATUS TEXT: "
 581                             + this.request.statusText );
 582                 err.code = 'HTTP';
 583
 584                 if (this.errorHandler) {
 585                     this.errorHandler(err);
 586                 }
 587                 else {
 588                     throw err;
 589                 }
 590             }
 591         }
 592     }
 593 };
 594
 595 /*
 596 *********************************************************************************
 597 ** QUERY CLASS ******************************************************************
 598 *********************************************************************************
 599 */
 600 var pzQuery = function()
 601 {
 602     this.simpleQuery = '';
 603     this.singleFilter = null;
 604     this.advTerms = new Array();
 605     this.filterHash = new Array();
 606     this.numTerms = 0;
 607     this.filterNums = 0;
 608 };
 609 pzQuery.prototype = {
 610     reset: function()
 611     {
 612         this.simpleQuery = '';
 613         this.advTerms = new Array();
 614         this.simpleFilter = null;
 615         this.numTerms = 0;
 616     },
 617     addTerm: function(field, value)
 618     {
 619         var term = {"field": field, "value": value};
 620         this.advTerms[this.numTerms] = term;
 621         this.numTerms++;
 622     },
 623     getTermValueByIdx: function(index)
 624     {
 625         return this.advTerms[index].value;
 626     },
 627     getTermFieldByIdx: function(index)
 628     {
 629         return this.advTerms[index].field;
 630     },
 631     /* semicolon separated list of terms for given field*/
 632     getTermsByField: function(field)
 633     {
 634         var terms = '';
 635         for(var i = 0; i < this.advTerms.length; i++)
 636         {
 637             if( this.advTerms[i].field == field )
 638                 terms = terms + this.queryHas[i].value + ';';
 639         }
 640         return terms;
 641     },
 642     addTermsFromList: function(inputString, field)
 643     {
 644         var inputArr = inputString.split(';');
 645         for(var i=0; i < inputArr.length; i++)
 646         {
 647             if(inputArr[i].length < 3) continue;
 648             this.advTerms[this.numTerms] = {"field": field, "value": inputArr[i] };
 649             this.numTerms++;
 650         }
 651     },
 652     removeTermByIdx: function(index)
 653     {
 654         this.advTerms.splice(index, 1);
 655         this.numTerms--;
 656     },
 657     toCCL: function()
 658     {
 659         var ccl = '';
 660         if( this.simpleQuery != '')
 661             ccl = this.simpleQuery;
 662         for(var i = 0; i < this.advTerms.length; i++)
 663         {
 664             if (ccl != '') ccl = ccl + ' and ';
 665             ccl = ccl + this.advTerms[i].field+'="'+this.advTerms[i].value+'"';
 666         }
 667         return ccl;
 668     },
 669     addFilter: function(name, value)
 670     {
 671         var filter = {"name": name, "id": value };
 672         this.filterHash[this.filterHash.length] = filter;
 673         this.filterNums++
 674         return  this.filterHash.length - 1;
 675     },
 676     setFilter: function(name, value)
 677     {
 678         this.filterHash = new Array();
 679         this.filterNums = 0;
 680         this.addFilter(name, value);
 681     },
 682     getFilter: function(index)
 683     {
 684         return this.filterHash[index].id;
 685     },
 686     getFilterName: function(index)
 687     {
 688         return this.filterHash[index].name;
 689     },
 690     removeFilter: function(index)
 691     {
 692         delete this.filterHash[index];
 693         this.filterNums--;
 694     },
 695     clearFilter: function()
 696     {
 697         this.filterHash = new Array();
 698         this.filterNums = 0;
 699     },
 700     getFilterString: function()
 701     {
 702         //temporary
 703         if( this.singleFilter != null ) {
 704             return 'pz:id='+this.singleFilter.id;
 705         }
 706         else if( this.filterNums <= 0 ) {
 707             return undefined;
 708         }
 709
 710         var filter = 'pz:id=';
 711         for(var i = 0; i < this.filterHash.length; i++)
 712         {
 713             if (this.filterHash[i] == undefined) continue;
 714             if (filter > 'pz:id=') filter = filter + '|';
 715             filter += this.filterHash[i].id;
 716         }
 717         return filter;
 718     },
 719     totalLength: function()
 720     {
 721         var simpleLength = this.simpleQuery != '' ? 1 : 0;
 722         return this.advTerms.length + simpleLength;
 723     },
 724     clearSingleFilter: function()
 725     {
 726         this.singleFilter = null;
 727     },
 728     setSingleFilter: function(name, value)
 729     {
 730         this.singleFilter = {"name": name, "id": value };
 731     },
 732     getSingleFilterName: function()
 733     {
 734         return this.singleFilter.name;
 735     }
 736 }
 737
 738 }