2 ** $Id: pz2.js,v 1.8 2007-04-18 03:42:30 quinn Exp $
3 ** pz2.js - pazpar2's javascript client library.
6 //since explorer is flawed
8 window.Node = new Object();
10 Node.ATTRIBUTE_NODE = 2;
12 Node.CDATA_SECTION_NODE = 4;
13 Node.ENTITY_REFERENCE_NODE = 5;
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;
23 if(typeof window.jQuery == "undefined"){
24 throw new Error("pz2.js requires jQuery library");
26 // prevent execution of more than once
27 if(typeof window.pz2 == "undefined") {
28 window.undefined = window.undefined;
30 var pz2 = function(paramArray) {
34 // at least one callback required
36 throw new Error("An array with parameters has to be suplied when instantiating a class");
39 __myself.statCallback = paramArray.onstat || null;
40 __myself.showCallback = paramArray.onshow || null;
41 __myself.termlistCallback = paramArray.onterm || null;
42 __myself.recordCallback = paramArray.onrecord || null;
43 __myself.bytargetCallback = paramArray.onbytarget || null;
46 __myself.termKeys = paramArray.termlist || "subject";
48 // some configurational stuff
49 __myself.pz2String = "search.pz2";
50 __myself.keepAlive = 50000;
52 __myself.sessionID = null;
53 __myself.initStatusOK = false;
54 __myself.pingStatusOK = false;
55 __myself.searchStatusOK = false;
57 if ( paramArray.keepAlive < __myself.keepAlive )
58 __myself.keepAlive = paramArray.keepAlive;
61 __myself.currentSort = "relevance";
63 __myself.currentStart = 0;
64 __myself.currentNum = 20;
66 // last full record retrieved
67 __myself.currRecID = null;
69 __myself.currQuery = null;
72 __myself.statTime = paramArray.stattime || 2000;
73 __myself.statTimer = null;
74 __myself.termTime = paramArray.termtime || 1000;
75 __myself.termTimer = null;
76 __myself.showTime = paramArray.showtime || 1000;
77 __myself.showTimer = null;
78 __myself.showFastCount = 4;
79 __myself.bytargetTime = paramArray.bytargettime || 1000;
80 __myself.bytargetTimer = null;
83 __myself.dumpFactor = 500;
84 __myself.showCounter = 0;
85 __myself.termCounter = 0;
87 // active clients, updated by stat and show
88 // might be an issue since bytarget will poll accordingly
89 __myself.activeClients = 1;
92 $(document).ajaxError(
93 function (request, settings, exception) {
94 if ( settings.responseXML && settings.responseXML.getElementsByTagName("error") )
95 throw new Error( settings.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue);
99 if (paramArray.autoInit !== false)
100 __myself.init(__myself.keepAlive);
103 init: function(keepAlive)
105 if ( keepAlive < __myself.keepAlive )
106 __myself.keepAlive = keepAlive;
108 $.get( __myself.pz2String,
109 { "command": "init" },
111 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
112 __myself.initStatusOK = true;
113 __myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
114 setTimeout(__myself.ping, __myself.keepAlive);
117 // if it gets here the http return code was 200 (pz2 errors are 417)
118 // but the response was invalid, it should never occur
119 setTimeout("__myself.init()", 1000);
123 // no need to ping explicitly
126 if( !__myself.initStatusOK )
128 // session is not initialized code here
130 $.get( __myself.pz2String,
131 { "command": "ping", "session": __myself.sessionID },
133 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
134 __myself.pingStatusOK = true;
135 setTimeout("__myself.ping()", __myself.keepAlive);
138 // if it gets here the http return code was 200 (pz2 errors are 417)
139 // but the response was invalid, it should never occur
140 setTimeout("__myself.ping()", 1000);
144 search: function(query, num, sort, filter)
146 clearTimeout(__myself.statTimer);
147 clearTimeout(__myself.showTimer);
148 clearTimeout(__myself.termTimer);
149 clearTimeout(__myself.bytargetTimer);
151 __myself.showCounter = 0;
152 __myself.termCounter = 0;
154 if( !__myself.initStatusOK )
157 if( query !== undefined )
158 __myself.currQuery = query;
160 throw new Error("You need to supply query to the search command");
162 if( filter !== undefined )
163 var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery, "filter": filter };
165 var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery };
167 $.get( __myself.pz2String,
170 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
171 __myself.searchStatusOK = true;
173 __myself.show(0, num, sort);
174 if ( __myself.statCallback )
175 __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 2);
176 if ( __myself.termlistCallback )
177 //__myself.termlist();
178 __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 2);
179 if ( __myself.bytargetCallback )
180 __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 2);
183 // if it gets here the http return code was 200 (pz2 errors are 417)
184 // but the response was invalid, it should never occur
185 setTimeout("__myself.search(__myself.currQuery)", 1000);
191 if( !__myself.searchStatusOK )
193 // if called explicitly takes precedence
194 clearTimeout(__myself.statTimer);
196 $.get( __myself.pz2String,
197 { "command": "stat", "session": __myself.sessionID },
199 if ( data.getElementsByTagName("stat") ) {
200 var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
201 __myself.activeClients = activeClients;
203 "activeclients": activeClients,
204 "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
205 "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
206 "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
207 "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
208 "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
209 "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
210 "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
211 "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
212 "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
214 __myself.statCallback(stat);
215 if (activeClients > 0)
216 __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime);
219 // if it gets here the http return code was 200 (pz2 errors are 417)
220 // but the response was invalid, it should never occur
221 __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
225 show: function(start, num, sort)
227 if( !__myself.searchStatusOK )
229 // if called explicitly takes precedence
230 clearTimeout(__myself.showTimer);
232 if( sort !== undefined )
233 __myself.currentSort = sort;
234 if( start !== undefined )
235 __myself.currentStart = Number( start );
236 if( num !== undefined )
237 __myself.currentNum = Number( num );
239 $.get( __myself.pz2String,
240 { "command": "show", "session": __myself.sessionID, "start": __myself.currentStart,
241 "num": __myself.currentNum, "sort": __myself.currentSort, "block": 1 },
243 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
244 // first parse the status data send along with records
245 // this is strictly bound to the format
246 var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
248 "activeclients": activeClients,
249 "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
250 "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
251 "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
252 "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue ),
255 // parse all the first-level nodes for all <hit> tags
256 var hits = data.getElementsByTagName("hit");
257 var hit = new Array();
258 for (i = 0; i < hits.length; i++) {
259 show.hits[i] = new Array();
260 show.hits[i]['location'] = new Array();
261 for ( j = 0; j < hits[i].childNodes.length; j++) {
263 if ( hits[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
264 if (hits[i].childNodes[j].nodeName == 'location') {
265 var locNode = hits[i].childNodes[j];
266 var id = locNode.getAttribute('id');
267 show.hits[i]['location'][id] = {
268 "id": locNode.getAttribute("id"),
269 "name": locNode.getAttribute("name")
273 var nodeName = hits[i].childNodes[j].nodeName;
274 var nodeText = hits[i].childNodes[j].firstChild.nodeValue;
275 show.hits[i][nodeName] = nodeText;
280 __myself.showCallback(show);
281 __myself.showCounter++;
282 var delay = __myself.showTime;
283 if (__myself.showCounter > __myself.showFastCount)
286 if (activeClients > 0)
287 __myself.showTimer = setTimeout("__myself.show()", delay);
290 // if it gets here the http return code was 200 (pz2 errors are 417)
291 // but the response was invalid, it should never occur
292 __myself.showTimer = setTimeout("__myself.show()", __myself.showTime / 4);
298 if( !__myself.searchStatusOK )
301 if( id !== undefined )
302 __myself.currRecID = id;
304 $.get( __myself.pz2String,
305 { "command": "record", "session": __myself.sessionID, "id": __myself.currRecID },
308 var record = new Array();
309 if ( recordNode = data.getElementsByTagName("record")[0] ) {
310 for ( i = 0; i < recordNode.childNodes.length; i++) {
311 if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE ) {
312 var nodeName = recordNode.childNodes[i].nodeName;
313 var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
314 record[nodeName] = nodeText;
317 // the location is hard coded
318 var locationNodes = recordNode.getElementsByTagName("location");
319 record["location"] = new Array();
320 for ( i = 0; i < locationNodes.length; i++ ) {
321 record["location"][i] = {
322 "id": locationNodes[i].getAttribute("id"),
323 "name": locationNodes[i].getAttribute("name")
325 for ( j = 0; j < locationNodes[i].childNodes.length; j++) {
326 if ( locationNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
327 var nodeName = locationNodes[i].childNodes[j].nodeName;
329 if (locationNodes[i].childNodes[j].firstChild)
330 nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
333 record["location"][i][nodeName] = nodeText;
337 __myself.recordCallback(record);
340 // if it gets here the http return code was 200 (pz2 errors are 417)
341 // but the response was invalid, it should never occur
342 setTimeout("__myself.record(__myself.currRecID)", 1000);
348 if( !__myself.searchStatusOK )
350 // if called explicitly takes precedence
351 clearTimeout(__myself.termTimer);
353 $.get( __myself.pz2String,
354 { "command": "termlist", "session": __myself.sessionID, "name": __myself.termKeys },
356 if ( data.getElementsByTagName("termlist") ) {
357 var termList = { "activeclients": Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue ) };
358 var termLists = data.getElementsByTagName("list");
360 for (i = 0; i < termLists.length; i++) {
361 var listName = termLists[i].getAttribute('name');
362 termList[listName] = new Array();
363 var terms = termLists[i].getElementsByTagName('term');
364 //for each term in the list
365 for (j = 0; j < terms.length; j++) {
367 "name": terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue,
368 "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue
371 var termIdNode = terms[j].getElementsByTagName("id");
372 if(terms[j].getElementsByTagName("id").length)
373 term["id"] = termIdNode[0].childNodes[0].nodeValue;
375 termList[listName][j] = term;
379 __myself.termlistCallback(termList);
380 __myself.termCounter++;
381 if (termList["activeclients"] > 0)
382 __myself.termTimer = setTimeout("__myself.termlist()", (__myself.termTime + __myself.termCounter*__myself.dumpFactor));
385 // if it gets here the http return code was 200 (pz2 errors are 417)
386 // but the response was invalid, it should never occur
387 __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
394 if( !__myself.searchStatusOK )
396 // if called explicitly takes precedence
397 clearTimeout(__myself.bytargetTimer);
399 $.get( __myself.pz2String,
400 { "command": "bytarget", "session": __myself.sessionID },
402 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
403 var targetNodes = data.getElementsByTagName("target");
404 var bytarget = new Array();
405 for ( i = 0; i < targetNodes.length; i++) {
406 bytarget[i] = new Array();
407 for( j = 0; j < targetNodes[i].childNodes.length; j++ ) {
408 if ( targetNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
409 var nodeName = targetNodes[i].childNodes[j].nodeName;
410 var nodeText = targetNodes[i].childNodes[j].firstChild.nodeValue;
411 bytarget[i][nodeName] = nodeText;
415 __myself.bytargetCallback(bytarget);
416 if ( __myself.activeClients > 0 )
417 __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime);
420 // if it gets here the http return code was 200 (pz2 errors are 417)
421 // but the response was invalid, it should never occur
422 __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
426 // just for testing, probably shouldn't be here
427 showNext: function(page)
429 var step = page || 1;
430 __myself.show( ( step * __myself.currentNum ) + __myself.currentStart );
432 showPrev: function(page)
434 if (__myself.currentStart == 0 )
436 var step = page || 1;
437 var newStart = __myself.currentStart - (step * __myself.currentNum );
438 __myself.show( newStart > 0 ? newStart : 0 );
440 showPage: function(pageNum)
442 //var page = pageNum || 1;
443 __myself.show(pageNum * __myself.currentNum);