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(function ($) { |
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$.fn.repeatable = function (userSettings) { |
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/** |
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* Default settings |
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* @type {Object} |
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*/ |
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var defaults = { |
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addTrigger: ".add", |
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deleteTrigger: ".delete", |
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max: null, |
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startWith: 0, |
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template: null, |
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itemContainer: ".field-group", |
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onAdd: function () {}, |
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onDelete: function () {} |
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}; |
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/** |
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* Iterator used to make each added |
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* repeatable element unique |
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* @type {Number} |
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*/ |
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var i = 0; |
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/** |
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* DOM element into which repeatable |
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* items will be added |
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* @type {jQuery object} |
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*/ |
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var target = $(this); |
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/** |
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* Blend passed user settings with defauly settings |
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* @type {array} |
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*/ |
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var settings = $.extend({}, defaults, userSettings); |
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/** |
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* Total templated items found on the page |
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* at load. These may be created by server-side |
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* scripts. |
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* @return null |
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*/ |
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var total = function () { |
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return $(target).find(settings.itemContainer).length; |
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}(); |
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/** |
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* Add an element to the target |
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* and call the callback function |
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* @return null |
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*/ |
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var addOne = function () { |
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createOne(); |
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settings.onAdd.call(this); |
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}; |
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/** |
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* Delete the parent element |
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* and call the callback function |
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* @return null |
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*/ |
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var deleteOne = function () { |
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$(this).parents(settings.itemContainer).first().remove(); |
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total--; |
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maintainAddBtn(); |
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settings.onDelete.call(this); |
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}; |
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/** |
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* Add an element to the target |
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* @return null |
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*/ |
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var createOne = function() { |
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getUniqueTemplate().appendTo(target); |
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total++; |
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maintainAddBtn(); |
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}; |
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/** |
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* Alter the given template to make |
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* each form field name unique |
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* @return {jQuery object} |
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*/ |
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var getUniqueTemplate = function () { |
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var template = $(settings.template).html(); |
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template = template.replace(/{\?}/g, "new" + i++); // {?} => iterated placeholder |
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template = template.replace(/\{[^\?\}]*\}/g, ""); // {valuePlaceholder} => "" |
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return $(template); |
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}; |
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/** |
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* Determines if the add trigger |
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* needs to be disabled |
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* @return null |
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*/ |
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var maintainAddBtn = function () { |
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if (!settings.max) { |
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return; |
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} |
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if (total === settings.max) { |
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$(settings.addTrigger).attr("disabled", "disabled"); |
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} else if (total < settings.max) { |
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$(settings.addTrigger).removeAttr("disabled"); |
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} |
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}; |
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/** |
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* Setup the repeater |
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* @return null |
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*/ |
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(function () { |
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$(settings.addTrigger).on("click", addOne); |
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$("form").on("click", ".delete", deleteOne); |
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if (!total) { |
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var toCreate = settings.startWith - total; |
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for (var j = 0; j < toCreate; j++) { |
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createOne(); |
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} |
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} |
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})(); |
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}; |
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})(jQuery); |