ffzg/rfid/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 // inject JavaScript RFID support
  16 $.getScript('http://localhost:9000/examples/koha-rfid.js');
  17
  18  */
  19
  20 function barcode_on_screen(barcode) {
  21         var found = 0;
  22         $('table tr td a:contains(130)').each( function(i,o) {
  23                 var possible = $(o).text();
  24 console.debug(i,o,possible, barcode);
  25                 if ( possible == barcode ) found++;
  26         })
  27         return found;
  28 }
  29
  30 function rfid_secure(barcode,sid,val) {
  31         console.debug('rfid_secure', barcode, sid, val);
  32         if ( barcode_on_screen(barcode) )
  33                 $.getJSON( 'http://localhost:9000/secure.js?' + sid + '=' + val + ';callback=?' )
  34 }
  35
  36 var rfid_reset_field = false;
  37
  38 function rfid_scan(data,textStatus) {
  39         var rfid_refresh = 1500; // ms
  40
  41         console.debug( 'rfid_scan', data, textStatus );
  42
  43         var span = $('span#rfid');
  44
  45         if ( span.size() == 0 ) // insert last in language bar on bottom
  46                 span = $('ul#i18nMenu').append('<li><span id=rfid>RFID reader found<span>');
  47
  48         if ( span.size() == 0 ) // or before login on top
  49                 span = $('div#login').prepend('<span id=rfid>RFID reader found</span>');
  50
  51         span = $('span#rfid');
  52
  53
  54         if ( data.tags ) {
  55                 if ( data.tags.length === 1 ) {
  56                         var t = data.tags[0];
  57 //                      if ( span.text() != t.content ) {
  58                         if ( 1 ) { // force update of security
  59
  60                                 var url = document.location.toString();
  61                                 var circulation = url.substr(-14,14) == 'circulation.pl';
  62                                 var returns = url.substr(-10,10) == 'returns.pl';
  63
  64                                 if ( t.content.length == 0 ) { // empty tag
  65
  66                                         span.text( t.sid + ' empty' ).css('color', 'red' );
  67
  68                                 } else if ( t.content.substr(0,3) == '130' ) { // books
  69
  70                                         if ( circulation )
  71                                                  rfid_secure( t.content, t.sid, 'D7' );
  72                                         if ( returns )
  73                                                  rfid_secure( t.content, t.sid, 'DA' );
  74
  75                                         var color = 'blue';
  76                                         if ( t.security.toUpperCase() == 'DA' ) color = 'red';
  77                                         if ( t.security.toUpperCase() == 'D7' ) color = 'green';
  78                                         span.text( t.content ).css('color', color);
  79
  80                                         if ( ! barcode_on_screen( t.content ) ) {
  81                                                 rfid_reset_field = 'barcode';
  82                                                 var i = $('input[name=barcode]:last');
  83                                                 if ( i.val() != t.content )  {
  84                                                         rfid_refresh = 0;
  85                                                         i.val( t.content )
  86                                                         .closest('form').submit();
  87                                                 }
  88                                         }
  89
  90                                 } else {
  91                                         span.text( t.content ).css('color', 'blue' );
  92
  93                                         if ( url.substr(-14,14) != 'circulation.pl' || $('form[name=mainform]').size() == 0 ) {
  94                                                 rfid_refresh = 0;
  95                                                 rfid_reset_field = 'findborrower';
  96                                                 $('input[name=findborrower]').val( t.content )
  97                                                         .parent().submit();
  98                                         }
  99                                 }
 100                         }
 101                 } else {
 102                         var error = data.tags.length + ' tags near reader: ';
 103                         $.each( data.tags, function(i,tag) { error += tag.content + ' '; } );
 104                         span.text( error ).css( 'color', 'red' );
 105                 }
 106
 107         } else {
 108                 span.text( 'no tags in range' ).css('color','gray');
 109                 if ( rfid_reset_field ) {
 110                         $('input[name='+rfid_reset_field+']').val( '' );
 111                         rfid_reset_field = false;
 112                 }
 113         }
 114
 115         if (rfid_refresh > 1) {
 116                 window.setTimeout( function() {
 117                         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 118                 }, rfid_refresh );
 119         } else {
 120                 console.debug('rfid_refresh disabled',rfid_refresh);
 121         }
 122 }
 123
 124 $(document).ready( function() {
 125         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 126 });