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(t,val) {
  31         if ( t.security.toUpperCase() == val.toUpperCase() ) return;
  32         console.debug('rfid_secure', t.content, t.sid, val);
  33         if ( barcode_on_screen(t.content) )
  34                 $.getJSON( 'http://localhost:9000/secure.js?' + t.sid + '=' + val + ';callback=?' )
  35 }
  36
  37 var rfid_reset_field = false;
  38
  39 function rfid_scan(data,textStatus) {
  40         var rfid_refresh = 1500; // ms
  41
  42         console.debug( 'rfid_scan', data, textStatus );
  43
  44         var span = $('span#rfid');
  45
  46         if ( span.size() == 0 ) // insert last in language bar on bottom
  47                 span = $('ul#i18nMenu').append('<li><span id=rfid>RFID reader found<span>');
  48
  49         if ( span.size() == 0 ) // or before login on top
  50                 span = $('div#login').prepend('<span id=rfid>RFID reader found</span>');
  51
  52         span = $('span#rfid');
  53
  54
  55         if ( data.tags ) {
  56                 if ( data.tags.length === 1 ) {
  57                         var t = data.tags[0];
  58 //                      if ( span.text() != t.content ) {
  59                         if ( 1 ) { // force update of security
  60
  61                                 var url = document.location.toString();
  62                                 var circulation = url.substr(-14,14) == 'circulation.pl';
  63                                 var returns = url.substr(-10,10) == 'returns.pl';
  64
  65                                 if ( t.content.length == 0 ) { // empty tag
  66
  67                                         span.text( t.sid + ' empty' ).css('color', 'red' );
  68
  69                                 } else if ( t.content.substr(0,3) == '130' ) { // books
  70
  71                                         if ( circulation ) rfid_secure( t, 'D7' );
  72                                         if ( returns     ) rfid_secure( t, 'DA' );
  73
  74                                         var color = 'blue';
  75                                         if ( t.security.toUpperCase() == 'DA' ) color = 'red';
  76                                         if ( t.security.toUpperCase() == 'D7' ) color = 'green';
  77                                         span.text( t.content ).css('color', color);
  78
  79                                         if ( ! barcode_on_screen( t.content ) ) {
  80                                                 rfid_reset_field = 'barcode';
  81                                                 var i = $('input[name=barcode]:last');
  82                                                 if ( i.val() != t.content )  {
  83                                                         rfid_refresh = 0;
  84                                                         i.val( t.content )
  85                                                         .closest('form').submit();
  86                                                 }
  87                                         }
  88
  89                                 } else {
  90                                         span.text( t.content ).css('color', 'blue' );
  91
  92                                         if ( $('.patroninfo:contains('+t.content+')').length == 1 ) {
  93                                                 console.debug('not submitting', t.contains);
  94                                         } else {
  95                                                 rfid_refresh = 0;
  96                                                 rfid_reset_field = 'findborrower';
  97                                                 $('input[name=findborrower]').val( t.content )
  98                                                         .parent().submit();
  99                                         }
 100                                 }
 101                         }
 102                 } else {
 103                         var error = data.tags.length + ' tags near reader: ';
 104                         $.each( data.tags, function(i,tag) { error += tag.content + ' '; } );
 105                         span.text( error ).css( 'color', 'red' );
 106                 }
 107
 108         } else {
 109                 span.text( 'no tags in range' ).css('color','gray');
 110                 if ( rfid_reset_field ) {
 111                         $('input[name='+rfid_reset_field+']').val( '' );
 112                         rfid_reset_field = false;
 113                 }
 114         }
 115
 116         if (rfid_refresh > 1) {
 117                 window.setTimeout( function() {
 118                         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 119                 }, rfid_refresh );
 120         } else {
 121                 console.debug('rfid_refresh disabled',rfid_refresh);
 122         }
 123 }
 124
 125 $(document).ready( function() {
 126         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 127 });