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                 if ( possible == barcode ) found++;
  25         })
  26         return found;
  27 }
  28
  29 var rfid_refresh = 1500; // ms
  30
  31 function rfid_secure_json(t,val, success) {
  32         if ( t.security.toUpperCase() == val.toUpperCase() ) return;
  33         rfid_refresh = 0; // disable rfid pull until secure call returns
  34         console.log('rfid_secure_json', t, val);
  35         $.getJSON( 'http://localhost:9000/secure.js?' + t.sid + '=' + val + ';callback=?', success );
  36 }
  37
  38 function rfid_secure_check(t,val) {
  39         if ( barcode_on_screen(t.content) ) {
  40                 rfid_secure_json(t, val);
  41         }
  42 }
  43
  44
  45 var rfid_reset_field = false;
  46
  47 function rfid_scan(data,textStatus) {
  48
  49         console.debug( 'rfid_scan', data, textStatus );
  50
  51         var span = $('span#rfid');
  52
  53         if ( span.size() == 0 ) // insert last in language bar on bottom
  54                 span = $('ul#i18nMenu').append('<li><span id=rfid>RFID reader found<span>');
  55
  56         if ( span.size() == 0 ) // or before login on top
  57                 span = $('div#login').prepend('<span id=rfid>RFID reader found</span>');
  58
  59         span = $('span#rfid');
  60
  61
  62         if ( data.tags ) {
  63                 if ( data.tags.length === 1 ) {
  64                         var t = data.tags[0];
  65 //                      if ( span.text() != t.content ) {
  66                         if ( 1 ) { // force update of security
  67
  68                                 var script_name = document.location.pathname.split(/\//).pop();
  69                                 var tab_active  = $("#header_search .ui-tabs-panel:not(.ui-tabs-hide)").prop('id');
  70                                 console.debug('tab_active', tab_active);
  71                                 var circulation = script_name == 'circulation.pl';
  72                                 var returns     = script_name == 'returns.pl' || tab_active == 'checkin_search';
  73
  74                                 if ( t.content.length == 0 ) { // empty tag
  75
  76                                         span.text( t.sid + ' empty' ).css('color', 'red' );
  77
  78                                 } else if ( t.content.substr(0,3) == '130' ) { // books
  79
  80                                         var color = 'blue';
  81                                         if ( t.security.toUpperCase() == 'DA' ) color = 'red';
  82                                         if ( t.security.toUpperCase() == 'D7' ) color = 'green';
  83                                         span.text( t.content ).css('color', color);
  84
  85
  86                                         if ( tab_active == 'catalog_search' ) {
  87                                                 if ( $('span.term:contains(bc:'+t.content+')').length == 0 ) {
  88                                                         $('input[name=q]').val( 'bc:' + t.content ).closest('form').submit();
  89                                                 }
  90                                         }
  91
  92                                         if ( ! barcode_on_screen( t.content ) || returns ) {
  93                                                 rfid_reset_field = 'barcode';
  94
  95                                                 // return must be first to catch change of tab to check-in
  96                                                 var afi_secure    = returns ? 'DA' : 'D7';
  97                                                 var form_selector = returns ? 'first' : 'last';
  98                                                 if ( returns || circulation ) {
  99                                                         var i = $('input[name=barcode]:'+form_selector);
 100                                                         if ( i.val() != t.content )  {
 101                                                                 rfid_secure_json( t, afi_secure, function(data) {
 102                                                                         console.log('secure', afi_secure, data);
 103                                                                         i.val( t.content ).closest('form').submit();
 104                                                                 });
 105                                                         }
 106                                                 } else {
 107                                                         console.error('not in circulation or returns');
 108                                                 }
 109                                         }
 110
 111                                 } else {
 112                                         span.text( t.content ).css('color', 'blue' );
 113
 114                                         if ( $('.patroninfo:contains('+t.content+')').length == 1 ) {
 115                                                 console.debug('not submitting', t.contains);
 116                                         } else {
 117                                                 rfid_refresh = 0; // stop rfid scan while submitting form
 118                                                 rfid_reset_field = 'findborrower';
 119                                                 $('input[name=findborrower]').val( t.content )
 120                                                         .parent().submit();
 121                                         }
 122                                 }
 123                         }
 124                 } else {
 125                         var error = data.tags.length + ' tags near reader: ';
 126                         $.each( data.tags, function(i,tag) { error += tag.content + ' '; } );
 127                         span.text( error ).css( 'color', 'red' );
 128                 }
 129
 130         } else {
 131                 span.text( 'no tags in range' ).css('color','gray');
 132                 if ( rfid_reset_field ) {
 133                         $('input[name='+rfid_reset_field+']').val( '' );
 134                         rfid_reset_field = false;
 135                 }
 136         }
 137
 138         if (rfid_refresh > 1) {
 139                 window.setTimeout( function() {
 140                         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 141                 }, rfid_refresh );
 142         } else {
 143                 console.debug('rfid_refresh disabled',rfid_refresh);
 144         }
 145 }
 146
 147 $(document).ready( function() {
 148         $.getJSON("http://localhost:9000/scan?callback=?", rfid_scan);
 149 });