www/pz2_js/pz2.js

   1 /* prevent execution of more than once */
   2 if(typeof window.pz2 == "undefined") {
   3 window.undefined = window.undefined;
   4
   5 var pz2 = function(callbackArr, autoInit, keepAlive) {
   6     //for convenience
   7     myself = this;
   8
   9     // at least one callback required
  10     if ( !callbackArr )
  11         throw new Error("Callback parameters array has to be suplied when instantiating a class");
  12
  13     // function callbacks
  14     myself.statCallback = callbackArr.onstat;
  15     myself.showCallback = callbackArr.onshow;
  16     myself.termlistCallback = callbackArr.onterm;
  17     myself.recordCallback = callbackArr.onrecord || null;
  18
  19     // termlist keys
  20     myself.termKeys = callbackArr.termlist || "subject";
  21
  22     myself.pz2String = "search.pz2";
  23     myself.sessionID = null;
  24     myself.initStatusOK = false;
  25     myself.pingStatusOK = false;
  26     myself.searchStatusOK = false;
  27     myself.keepAlive = 50000;
  28
  29     if ( keepAlive < myself.keepAlive )
  30         myself.keepAlive = keepAlive;
  31
  32     // for sorting
  33     myself.currentSort = "relevance";
  34     // where are we?
  35     myself.currentStart = 0;
  36     myself.currentNum = 20;
  37
  38     //timers
  39     myself.statTime = 2000;
  40     myself.statTimer = null;
  41     myself.termTime = 1000;
  42     myself.termTimer = null;
  43     myself.showTime = 1000;
  44     myself.showTimer = null;
  45
  46     // error handling
  47     $(document).ajaxError(
  48     function (request, settings, exception) {
  49         if ( settings.responseXML && settings.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue)
  50             throw new Error( settings.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue);
  51     });
  52
  53     if (autoInit !== false)
  54         myself.init(myself.keepAlive);
  55 }
  56 pz2.prototype = {
  57     init: function(keepAlive) {
  58         if ( keepAlive < myself.keepAlive ) myself.keepAlive = keepAlive;
  59         $.get( myself.pz2String,
  60             { command: "init" },
  61             function(data) {
  62                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
  63                     myself.initStatusOK = true;
  64                     myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
  65                     setTimeout(myself.ping, myself.keepAlive);
  66                 }
  67             }
  68         );
  69     },
  70     // no need to ping explicitly
  71     ping: function() {
  72         if( !myself.initStatusOK )
  73             return;
  74             // session is not initialized code here
  75         $.get( myself.pz2String,
  76             { command: "ping", session: myself.sessionID },
  77             function(data) {
  78                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
  79                     myself.pingStatusOK = true;
  80                     setTimeout("myself.ping()", myself.keepAlive);
  81                 }
  82                 else
  83                     location = "?";
  84             }
  85         );
  86     },
  87     search: function(query, num, sort) {
  88         clearTimeout(myself.statTimer);
  89         clearTimeout(myself.showTimer);
  90         clearTimeout(myself.termTimer);
  91         if( !myself.initStatusOK )
  92             return;
  93         $.get( myself.pz2String,
  94             { command: "search", session: myself.sessionID, query: query },
  95             function(data) {
  96                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
  97                     myself.searchStatusOK = true;
  98                     //piggyback search
  99                     myself.show(0, num, sort)
 100                     if ( myself.statCallback )
 101                         myself.statTimer = setTimeout("myself.stat()", myself.statTime / 2);
 102                     if ( myself.termlistCallback )
 103                         myself.termTimer = setTimeout("myself.termlist()", myself.termTime / 2);
 104                 }
 105                 else
 106                     location = "?";
 107             }
 108         );
 109     },
 110     // callback, not to be called explicitly
 111     stat: function(test) {
 112         if( !myself.searchStatusOK )
 113             return;
 114         $.get( myself.pz2String,
 115             { command: "stat", session: myself.sessionID },
 116             function(data) {
 117                 if ( data.getElementsByTagName("stat") ) {
 118                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 119                     var stat = {
 120                     "activeclients": activeClients,
 121                     "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
 122                     "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
 123                     "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
 124                     "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
 125                     "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
 126                     "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
 127                     "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
 128                     "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
 129                     "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
 130                     }
 131                     myself.statCallback(stat);
 132                     if (activeClients > 0)
 133                         myself.statTimer = setTimeout("myself.stat()", myself.statTime);
 134                 }
 135                 else
 136                     myself.statTimer = setTimeout("myself.stat()", myself.statTime / 4)
 137                     //location = "?";
 138                     // some error handling
 139             }
 140         );
 141     },
 142     //callback not to be called explicitly
 143     show: function(start, num, sort) {
 144         clearTimeout(myself.showTimer);
 145         if( !myself.searchStatusOK )
 146             return;
 147
 148         if( sort !== undefined )
 149             myself.currentSort = sort;
 150         if( start !== undefined )
 151             myself.currentStart = Number( start );
 152         if( num !== undefined )
 153             myself.currentNum = Number( num );
 154
 155         $.get( myself.pz2String,
 156             { "command": "show", "session": myself.sessionID, "start": myself.currentStart, "num": myself.currentNum, "sort": myself.currentSort, "block": 1 },
 157             function(data) {
 158                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 159                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 160                     var show = {
 161                     "activeclients": activeClients,
 162                     "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
 163                     "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
 164                     "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
 165                     "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue ),
 166                     "hits": []
 167                     }
 168
 169                     var hits = data.getElementsByTagName("hit");
 170                     var hit = new Array();
 171                     for (i = 0; i < hits.length; i++) {
 172                         show.hits[i] = new Array();
 173                         for ( j = 0; j < hits[i].childNodes.length; j++) {
 174                             if ( hits[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
 175                                 var nodeName = hits[i].childNodes[j].nodeName;
 176                                 var nodeText = hits[i].childNodes[j].firstChild.nodeValue;
 177                                 show.hits[i][nodeName] = nodeText;
 178                             }
 179                         }
 180                     }
 181
 182                     //TODO include records
 183                     myself.showCallback(show);
 184                     if (activeClients > 0)
 185                         myself.showTimer = setTimeout("myself.show()", myself.showTime);
 186                 }
 187                 else
 188                     myself.showTimer = setTimeout("myself.show()", myself.showTime / 4);
 189                     // location = "?";
 190                     // some error handling
 191             }
 192         );
 193     },
 194     record: function(id) {
 195         if( !myself.searchStatusOK )
 196             return;
 197         $.get( myself.pz2String,
 198             { "command": "record", "session": myself.sessionID, "id": id },
 199             function(data) {
 200                 var recordNode;
 201                 var record = new Array();
 202                 if ( recordNode = data.getElementsByTagName("record")[0] ) {
 203                     for ( i = 0; i < recordNode.childNodes.length; i++) {
 204                         if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE ) {
 205                             var nodeName = recordNode.childNodes[i].nodeName;
 206                             var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
 207                             record[nodeName] = nodeText;
 208                         }
 209                     }
 210                     myself.recordCallback(record);
 211                 }
 212                 else
 213                     alert("");
 214                     //location = "?";
 215                     // some error handling
 216             }
 217         );
 218
 219     },
 220     termlist: function() {
 221         if( !myself.searchStatusOK )
 222             return;
 223         $.get( myself.pz2String,
 224             { "command": "termlist", "session": myself.sessionID, "name": myself.termKeys },
 225             function(data) {
 226                 if ( data.getElementsByTagName("termlist") ) {
 227                     var termList = { "activeclients": Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue ) }
 228                     var termLists = data.getElementsByTagName("list");
 229                     //for each termlist
 230                     for (i = 0; i < termLists.length; i++) {
 231                         var listName = termLists[i].getAttribute('name');
 232                         termList[listName] = new Array();
 233                         var terms = termLists[i].getElementsByTagName('term');
 234                         //for each term in the list
 235                         for (j = 0; j < terms.length; j++) {
 236                             var term = {
 237                                 "name": terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue,
 238                                 "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue,
 239                             }
 240                             termList[listName][j] = term;
 241                         }
 242                     }
 243                     myself.termlistCallback(termList);
 244                     if (termList["activeclients"] > 0)
 245                         myself.termTimer = setTimeout("myself.termlist()", myself.termTime);
 246                 }
 247                 else
 248                     myself.termTimer = setTimeout("myself.termlist()", myself.termTime / 4);
 249                     //location = "?";
 250                     // some error handling
 251             }
 252         );
 253
 254     },
 255     bytarget: function() {
 256     }
 257 };
 258 }