examples/koha-rfid.js

   1 /*
   2  * RFID support for Koha
   3  *
   4  * Writtern by Dobrica Pavlinusic <dpavlin@rot13.org> under GPL v2 or later
   5  *
   6  * This provides example how to intergrate JSONP interface from
   7  *
   8  * scripts/RFID-JSONP-server.pl
   9  *
  10  * to provide overlay for tags in range and emulate form fill for Koha Library System
  11  * which allows check-in and checkout-operations without touching html interface
  12  */
  13
  14 function barcode_on_screen(barcode) {
  15         var found = 0;
  16         $('table tr td a:contains(130)').each( function(i,o) {
  17                 var possible = $(o).text();
  18 console.debug(i,o,possible, barcode);
  19                 if ( possible == barcode ) found++;
  20         })
  21         return found;
  22 }
  23
  24 function rfid_secure(barcode,sid,val) {
  25         console.debug('rfid_secure', barcode, sid, val);
  26         if ( barcode_on_screen(barcode) )
  27                 $.getJSON( 'http://localhost:9000/secure.js?' + sid + '=' + val + ';callback=?' )
  28 }
  29
  30 var rfid_reset_field = false;
  31
  32 function rfid_scan(data,textStatus) {
  33 //      console.debug( 'rfid_scan', data, textStatus );
  34
  35         var span = $('span#rfid');
  36         if ( span.size() == 0 ) {
  37                 $('ul#i18nMenu').append('<li><span id=rfid>RFID reader found<span>');
  38                 span = $('span#rfid');
  39         }
  40
  41         if ( data.tags ) {
  42                 if ( data.tags.length === 1 ) {
  43                         var t = data.tags[0];
  44 //                      if ( span.text() != t.content ) {
  45                         if ( 1 ) { // force update of security
  46
  47                                 var url = document.location.toString();
  48                                 var circulation = url.substr(-14,14) == 'circulation.pl';
  49                                 var returns = url.substr(-10,10) == 'returns.pl';
  50
  51                                 if ( t.content.substr(0,3) == '130' ) {
  52
  53                                         if ( circulation )
  54                                                  rfid_secure( t.content, t.sid, 'D7' );
  55                                         if ( returns )
  56                                                  rfid_secure( t.content, t.sid, 'DA' );
  57
  58                                         var color = 'blue';
  59                                         if ( t.security.toUpperCase() == 'DA' ) color = 'red';
  60                                         if ( t.security.toUpperCase() == 'D7' ) color = 'green';
  61                                         span.text( t.content ).css('color', color);
  62
  63                                         if ( ! barcode_on_screen( t.content ) ) {
  64                                                 rfid_reset_field = 'barcode';
  65                                                 var i = $('input[name=barcode]:last');
  66                                                 if ( i.val() != t.content )
  67                                                         i.val( t.content )
  68                                                         .closest('form').submit();
  69                                         }
  70
  71                                 } else {
  72                                         span.text( t.content ).css('color', 'blue' );
  73
  74                                         if ( url.substr(-14,14) != 'circulation.pl' || $('form[name=mainform]').size() == 0 ) {
  75                                                 rfid_reset_field = 'findborrower';
  76                                                 $('input[name=findborrower]').val( t.content )
  77                                                         .parent().submit();
  78                                         }
  79                                 }
  80                         }
  81                 } else {
  82                         var error = data.tags.length + ' tags near reader: ';
  83                         $.each( data.tags, function(i,tag) { error += tag.content + ' '; } );
  84                         span.text( error ).css( 'color', 'red' );
  85                 }
  86
  87         } else {
  88                 span.text( 'no tags in range' ).css('color','gray');
  89                 if ( rfid_reset_field ) {
  90                         $('input[name='+rfid_reset_field+']').val( '' );
  91                         rfid_reset_field = false;
  92                 }
  93         }
  94
  95         window.setTimeout( function() {
  96                 $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
  97         }, 1000 ); // 1000ms
  98 }
  99
 100 $(document).ready( function() {
 101         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 102 });