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     //
   7     if ( callbackArr == null )
   8         return null;
   9
  10     //for convenience
  11     myself = this;
  12
  13     myself.pz2String = "search.pz2";
  14     myself.sessionID;
  15     myself.initStatus = 0;
  16     myself.pingStatus = 0;
  17     myself.keepAlive = 50000;
  18
  19     if ( keepAlive < myself.keepAlive )
  20         myself.keepAlive = keepAlive;
  21
  22     // for sorting
  23     myself.currentSort = "relevance";
  24     myself.sortKeywords = [ "relevance", "title", "author" ];
  25
  26     // function callbacks
  27     myself.statCallback = callbackArr.onstat;
  28     myself.showCallback = callbackArr.onshow;
  29     myself.termlistCallback = callbackArr.onterm;
  30
  31     //timers
  32     myself.statTime = 2000;
  33     myself.statTimer;
  34     myself.termTime = 1000;
  35     myself.termTimer;
  36     myself.showTime = 1000;
  37     myself.showTimer;
  38
  39     if (autoInit == true)
  40         myself.init(myself.keepAlive);
  41 }
  42 pz2.prototype = {
  43     init: function(keepAlive) {
  44         if ( keepAlive < myself.keepAlive ) myself.keepAlive = keepAlive;
  45         $.get( myself.pz2String,
  46             { command: "init" },
  47             function(data) {
  48                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" )
  49                     myself.initStatus = 1;
  50                 myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
  51                 setTimeout(myself.ping, myself.keepAlive);
  52             }
  53         );
  54     },
  55     // no need to ping explicitly
  56     ping: function() {
  57         if( !myself.initStatus )
  58             return;
  59             // session is not initialized code here
  60         $.get( myself.pz2String,
  61             { command: "ping", session: myself.sessionID },
  62             function(data) {
  63                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
  64                     myself.pingStatus = 1;
  65                     setTimeout(myself.ping, myself.keepAlive);
  66                 }
  67                 else
  68                     location = "?";
  69             }
  70         );
  71     },
  72     search: function(query, num, sort) {
  73         clearTimeout(myself.statTimer);
  74         clearTimeout(myself.showTimer);
  75         clearTimeout(myself.termTimer);
  76         if( !myself.initStatus )
  77             return;
  78         $.get( myself.pz2String,
  79             { command: "search", session: myself.sessionID, query: query },
  80             function(data) {
  81                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
  82                     myself.searchStatus = 1;
  83                     //piggyback search
  84                     myself.show(0, num, sort)
  85                     if ( myself.statCallback )
  86                         myself.statTimer = setTimeout(myself.stat, myself.statTime / 2);
  87                     if ( myself.termlistCallback )
  88                         myself.termTimer = setTimeout(myself.termlist, myself.termTime / 2);
  89                 }
  90                 else
  91                     location = "?";
  92             }
  93         );
  94     },
  95     // callback, not to be called explicitly
  96     stat: function() {
  97         if( !myself.searchStatus )
  98             return;
  99         $.get( myself.pz2String,
 100             { command: "stat", session: myself.sessionID },
 101             function(data) {
 102                 if ( data.getElementsByTagName("stat") ) {
 103                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 104                     var stat = {
 105                     "activeclients": activeClients,
 106                     "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
 107                     "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
 108                     "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
 109                     "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
 110                     "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
 111                     "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
 112                     "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
 113                     "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
 114                     "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
 115                     }
 116                     myself.statCallback(stat);
 117                     if (activeClients > 0)
 118                         myself.statTimer = setTimeout(myself.stat, myself.statTime);
 119                 }
 120                 else
 121                     myself.statTimer = setTimeout(myself.stat, myself.statTime / 4)
 122                     //location = "?";
 123                     // some error handling
 124             }
 125         );
 126     },
 127     //callback not to be called explicitly
 128     show: function(start, num, sort) {
 129         clearTimeout(myself.showTimer);
 130         if( !myself.searchStatus )
 131             return;
 132         if ( myself.sortKeywords.some( function(element, index, arr) { if (element == sort) return true; else return false; } ) )
 133             myself.currentSort = sort;
 134         $.get( myself.pz2String,
 135             { "command": "show", "session": myself.sessionID, "start": start, "num": num, "sort": myself.currentSort, "block": 1 },
 136             function(data) {
 137                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
 138                     var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
 139                     var show = {
 140                     "activeclients": activeClients,
 141                     "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
 142                     "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
 143                     "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
 144                     "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue )
 145                     }
 146                     //TODO include records
 147                     myself.showCallback(show);
 148                     if (activeClients > 0)
 149                         myself.showTimer = setTimeout("myself.show(" + start + "," + num + "," + sort + ")", myself.showTime);
 150                 }
 151                 else
 152                     myself.showTimer = setTimeout("myself.show(" + start + "," + num + "," + sort + ")", myself.showTime / 4);
 153                     // location = "?";
 154                     // some error handling
 155             }
 156         );
 157     },
 158     record: function(id) {
 159     },
 160     termlist: function(name) {
 161         if( !myself.searchStatus )
 162             return;
 163         $.get( myself.pz2String,
 164             { "command": "termlist", "session": myself.sessionID, "name": "author" },
 165             function(data) {
 166                 if ( data.getElementsByTagName("termlist") ) {
 167                     var termList = { "activeclients": Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue ) }
 168                     var termLists = data.getElementsByTagName("list");
 169                     //for each termlist
 170                     for (i = 0; i < termLists.length; i++) {
 171                         var listName = termLists[i].getAttribute('name');
 172                         termList[listName] = new Array();
 173                         var terms = termLists[i].getElementsByTagName('term');
 174                         //for each term in the list
 175                         for (j = 0; j < terms.length; j++) {
 176                             var term = {
 177                                 "name": terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue,
 178                                 "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue,
 179                             }
 180                             termList[listName][j] = term;
 181                         }
 182                     }
 183                     myself.termlistCallback(termList);
 184                     if (termList["activeclients"] > 0)
 185                         myself.termTimer = setTimeout("myself.termlist(" + name + ")" , myself.termTime);
 186                 }
 187                 else
 188                     myself.termTimer = setTimeout("myself.termlist(" + name + ")" , myself.termTime / 4);
 189                     //location = "?";
 190                     // some error handling
 191             }
 192         );
 193
 194     },
 195     bytarget: function() {
 196     }
 197 };
 198 }