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  * You will have to inject remote javascript in Koha intranetuserjs using:
  14
  15
  16 <!-- this is basically remote script injection, doesn't work in Chrome with SSL -->
  17 //]]></script>
  18
  19 <!-- invoke local RFID javascript -->
  20 <script type="text/javascript"
  21 src="http://localhost:9000/examples/koha-rfid.js"
  22 >
  23
  24 <script type="text/javascript">
  25 //<![CDATA[
  26
  27  */
  28
  29 function barcode_on_screen(barcode) {
  30         var found = 0;
  31         $('table tr td a:contains(130)').each( function(i,o) {
  32                 var possible = $(o).text();
  33 console.debug(i,o,possible, barcode);
  34                 if ( possible == barcode ) found++;
  35         })
  36         return found;
  37 }
  38
  39 function rfid_secure(barcode,sid,val) {
  40         console.debug('rfid_secure', barcode, sid, val);
  41         if ( barcode_on_screen(barcode) )
  42                 $.getJSON( 'http://localhost:9000/secure.js?' + sid + '=' + val + ';callback=?' )
  43 }
  44
  45 var rfid_reset_field = false;
  46
  47 function rfid_scan(data,textStatus) {
  48 //      console.debug( 'rfid_scan', data, textStatus );
  49
  50         var span = $('span#rfid');
  51
  52         if ( span.size() == 0 ) // insert last in language bar on bottom
  53                 span = $('ul#i18nMenu').append('<li><span id=rfid>RFID reader found<span>');
  54
  55         if ( span.size() == 0 ) // or before login on top
  56                 span = $('div#login').prepend('<span id=rfid>RFID reader found</span>');
  57
  58         span = $('span#rfid');
  59
  60
  61         if ( data.tags ) {
  62                 if ( data.tags.length === 1 ) {
  63                         var t = data.tags[0];
  64 //                      if ( span.text() != t.content ) {
  65                         if ( 1 ) { // force update of security
  66
  67                                 var url = document.location.toString();
  68                                 var circulation = url.substr(-14,14) == 'circulation.pl';
  69                                 var returns = url.substr(-10,10) == 'returns.pl';
  70
  71                                 if ( t.content.length == 0 ) { // empty tag
  72
  73                                         span.text( t.sid + ' empty' ).css('color', 'red' );
  74
  75                                 } else if ( t.content.substr(0,3) == '130' ) { // books
  76
  77                                         if ( circulation )
  78                                                  rfid_secure( t.content, t.sid, 'D7' );
  79                                         if ( returns )
  80                                                  rfid_secure( t.content, t.sid, 'DA' );
  81
  82                                         var color = 'blue';
  83                                         if ( t.security.toUpperCase() == 'DA' ) color = 'red';
  84                                         if ( t.security.toUpperCase() == 'D7' ) color = 'green';
  85                                         span.text( t.content ).css('color', color);
  86
  87                                         if ( ! barcode_on_screen( t.content ) ) {
  88                                                 rfid_reset_field = 'barcode';
  89                                                 var i = $('input[name=barcode]:last');
  90                                                 if ( i.val() != t.content )
  91                                                         i.val( t.content )
  92                                                         .closest('form').submit();
  93                                         }
  94
  95                                 } else {
  96                                         span.text( t.content ).css('color', 'blue' );
  97
  98                                         if ( url.substr(-14,14) != 'circulation.pl' || $('form[name=mainform]').size() == 0 ) {
  99                                                 rfid_reset_field = 'findborrower';
 100                                                 $('input[name=findborrower]').val( t.content )
 101                                                         .parent().submit();
 102                                         }
 103                                 }
 104                         }
 105                 } else {
 106                         var error = data.tags.length + ' tags near reader: ';
 107                         $.each( data.tags, function(i,tag) { error += tag.content + ' '; } );
 108                         span.text( error ).css( 'color', 'red' );
 109                 }
 110
 111         } else {
 112                 span.text( 'no tags in range' ).css('color','gray');
 113                 if ( rfid_reset_field ) {
 114                         $('input[name='+rfid_reset_field+']').val( '' );
 115                         rfid_reset_field = false;
 116                 }
 117         }
 118
 119         window.setTimeout( function() {
 120                 $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 121         }, 1000 ); // 1000ms
 122 }
 123
 124 $(document).ready( function() {
 125         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 126 });