2011-05-19 15:44:04 +00:00
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$(document).ready(function() {
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// add/remove/sort items in a has_many relationship
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$('.has-many-selector').hasManySelector();
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});
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(function($){
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$.fn.hasManySelector = function(options) {
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var populateSelect = function(context) {
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2011-06-23 23:17:08 +00:00
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context.select.find('optgroup, option').remove();
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2011-05-19 15:44:04 +00:00
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for (var i = 0; i < context.data.collection.length; i++) {
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var obj = context.data.collection[i];
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2011-06-23 23:17:08 +00:00
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if (typeof(obj.name) != 'undefined') { // grouped items
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var optgroup = $('<optgroup/>').attr('label', obj.name);
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var size = 0;
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for (var j = 0; j < obj.items.length; j++) {
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var innerObj = obj.items[j];
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if ($.inArray(innerObj[1], context.data.taken_ids) == -1) {
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optgroup.append(new Option(innerObj[0], innerObj[1], true, true));
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size++;
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}
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}
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if (size > 0) context.select.append(optgroup);
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} else {
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if ($.inArray(obj[1], context.data.taken_ids) == -1)
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2011-07-14 01:53:05 +00:00
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{
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var option = new Option("", obj[1], true, true);
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$(option).text(obj[0]);
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context.select.append(option);
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}
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2011-06-23 23:17:08 +00:00
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}
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2011-05-19 15:44:04 +00:00
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}
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if (context.select.find('option').size() == 0)
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context.list.find('li.template').hide();
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else
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context.list.find('li.template').show();
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}
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var addId = function(context, id) {
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context.data.taken_ids.push(id);
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populateSelect(context);
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if (context.data.taken_ids.length > 0) {
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context.empty.hide();
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context.list.next('input[type=hidden]').remove();
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}
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if (context.data.taken_ids.length == context.data.collection.length)
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context.sep.hide();
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}
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var removeId = function(context, id) {
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context.data.taken_ids = jQuery.grep(context.data.taken_ids, function(value) {
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return value != id;
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});
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populateSelect(context);
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if (context.data.taken_ids.length == 0) {
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context.empty.show();
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context.list.after('<input type="hidden" name="' + context.baseInputName + '" value="" />');
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}
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context.sep.show();
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}
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var registerElementEvents = function(context, data, domElement) {
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// remove
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domElement.find('a.remove').click(function(e) {
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domElement.remove();
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removeId(context, data.id);
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context.list.sortable('refresh');
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e.preventDefault(); e.stopPropagation();
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});
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}
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var registerElementTemplateEvents = function(context, domElement) {
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// bind the "Add field" button
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domElement.find('button').click(function(e) {
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var newElement = {
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id: context.select.val(),
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label: context.select.find('option:selected').text()
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};
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addId(context, newElement.id);
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addElement(context, newElement, { refreshPosition: true });
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context.list.sortable('refresh');
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e.preventDefault(); e.stopPropagation();
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});
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}
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/* ___ Add an element into the list ___ */
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var addElement = function(context, data, options) {
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options = $.extend({
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'is_template': false,
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'refreshPosition': false
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}, options);
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data = $.extend({
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behaviour_flag: function() { return options.is_template ? 'template' : 'added' },
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base_name: function() { return options.is_template ? '' : context.baseInputName },
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if_template: function() { return options.is_template }
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}, data);
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var html = Mustache.to_html(context.template, data);
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var domElement = null;
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if (options.is_template) {
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domElement = context.list.append('<li class="sep"> </li>').append(html).find('.template');
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context.sep = context.list.find('.sep');
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registerElementTemplateEvents(context, domElement);
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}
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else {
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domElement = context.list.find('> .sep').before(html).prev('li');
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registerElementEvents(context, data, domElement);
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2011-05-20 13:27:07 +00:00
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context.error.hide();
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2011-05-19 15:44:04 +00:00
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context.list.sortable('refresh');
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}
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}
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return this.each(function() {
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var wrapper = $(this);
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var context = {
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list: wrapper.find('ul'),
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2011-05-20 13:27:07 +00:00
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empty: wrapper.find('p:first'),
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2011-05-19 15:44:04 +00:00
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template: wrapper.find('script[name=template]').html(),
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baseInputName: wrapper.find('script[name=template]').attr('data-base-input-name'),
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2011-05-20 13:27:07 +00:00
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data: eval(wrapper.find('script[name=data]').html()),
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error: wrapper.parent().find('p.inline-errors')
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2011-05-19 15:44:04 +00:00
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};
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// sortable list
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context.list.sortable({
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handle: 'span.handle',
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items: 'li:not(.template)',
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axis: 'y'
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});
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// add the template element used to insert the new ones
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addElement(context, null, { is_template: true });
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context.select = wrapper.find('select[name=label]');
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populateSelect(context);
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for (var i = 0; i < context.data.taken_ids.length; i++) {
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var data = { id: context.data.taken_ids[i], label: null };
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for (var j = 0; j < context.data.collection.length; j++) {
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var current = context.data.collection[j];
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2011-06-23 23:17:08 +00:00
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if (typeof(current.name) == 'undefined') {
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if (data.id == current[1]) {
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data.label = current[0];
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break;
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}
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} else { // loop thru the groups
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for (var k = 0; k < current.items.length; k++) {
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var localCurrent = current.items[k];
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if (data.id == localCurrent[1]) {
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data.label = localCurrent[0];
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break;
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}
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}
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}
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2011-05-19 15:44:04 +00:00
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}
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addElement(context, data);
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}
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2011-05-20 13:27:07 +00:00
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if (context.error.size() > 0)
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context.error.show();
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2011-05-19 15:44:04 +00:00
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});
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};
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})(jQuery);
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