var state;
var scan_timeout;
-var scan_tags_active = true;
+var pending_jsonp = 0;
function change_page(new_state) {
if ( state != new_state ) {
function got_visible_tags(data,textStatus) {
var html = 'No tags in range';
if ( data.tags ) {
+ scan_tags_active = false;
html = '<ul class="tags">';
$.each(data.tags, function(i,tag) {
console.debug( i, tag );
}
});
html += '</ul>';
+
+ scan_tags_active = true;
}
var arrows = Array( 8592, 8598, 8593, 8599, 8594, 8600, 8595, 8601 );
+ html
;
$('#tags').html( html );
- scan_timeout = window.setTimeout(function(){
- scan_tags();
- },tag_rescan); // re-scan every 200ms
+
+ pending_jsonp--;
};
function scan_tags() {
- if ( scan_tags_active ) {
+ if ( pending_jsonp ) {
+ console.debug('scan_tags disabled ', pending_jsonp, ' requests waiting');
+ } else {
console.info('scan_tags');
+ pending_jsonp++;
$.getJSON("/scan?callback=?", got_visible_tags);
- } else {
- console.debug('scan_tags disabled');
}
+
+ scan_timeout = window.setTimeout(function(){
+ scan_tags();
+ },tag_rescan); // re-scan every 200ms
}
$(document).ready(function() {
fill_in( 'borrower_number', borrower_cardnumber );
- scan_tags_active = false;
+ pending_jsonp++;
$.getJSON('/sip2/patron_info/'+borrower_cardnumber)
.done( function( data ) {
console.info('patron', data);
fill_in( 'borrower_email', data['BE'] );
fill_in( 'hold_items', data['fixed'].substr( 2 + 14 + 3 + 18 + ( 0 * 4 ), 4 ) ) * 1;
fill_in( 'overdue_items', data['fixed'].substr( 2 + 14 + 3 + 18 + ( 1 * 4 ), 4 ) ) * 1;
- scan_tags_active = true;
+ pending_jsonp--;
change_page('borrower_info');
}).fail( function(data) {
- scan_tags_active = true;
+ pending_jsonp--;
change_page('error');
});
}
&& barcode.substr(0,3) == 130
&& book_barcodes[barcode] != 1
) { // book, not seen yet
- scan_tags_active = false;
+ book_barcodes[ barcode ] = 1;
+ pending_jsonp++;
$.getJSON('/sip2/'+circulation_type+'/'+borrower_cardnumber+'/'+barcode+'/'+sid , function( data ) {
console.info( circulation_type, data );
$('ul#books').append('<li>' + ( data['AJ'] || barcode ) + ' <small>' + data['AF'] + '</small></li>');
- book_barcodes[ barcode ] = 1;
console.debug( book_barcodes );
- scan_tags_active = true;
+ pending_jsonp--;
}).fail( function() {
change_page('error');
- scan_tags_active = true;
+ pending_jsonp--;
});
}
}