text: (function ($) {
    "use strict";
  
    var defaultOptions = {
      tagClass: function(item) {
        return 'label label-info';
      },
      itemValue: function(item) {
        return item ? item.toString() : item;
      },
      itemText: function(item) {
        return this.itemValue(item);
      },
      freeInput: true,
      maxTags: undefined,
      confirmKeys: [13],
      onTagExists: function(item, $tag) {
        $tag.hide().fadeIn();
      }
    };
  
    /**
     * Constructor function
     */
    function TagsInput(element, options) {
      this.itemsArray = [];
  
      this.$element = $(element);
      this.$element.hide();
  
      this.isSelect = (element.tagName === 'SELECT');
      this.multiple = (this.isSelect && element.hasAttribute('multiple'));
      this.objectItems = options && options.itemValue;
      this.placeholderText = element.hasAttribute('placeholder') ? this.$element.attr('placeholder') : '';
      this.inputSize = Math.max(1, this.placeholderText.length);
  
      this.$container = $('<div class="bootstrap-tagsinput"></div>');
      this.$input = $('<input size="' + this.inputSize + '" type="text" placeholder="' + this.placeholderText + '"/>').appendTo(this.$container);
  
      this.$element.after(this.$container);
  
      this.build(options);
    }
  
    TagsInput.prototype = {
      constructor: TagsInput,
  
      /**
       * Adds the given item as a new tag. Pass true to dontPushVal to prevent
       * updating the elements val()
       */
      add: function(item, dontPushVal) {
        var self = this;
  
        if (self.options.maxTags && self.itemsArray.length >= self.options.maxTags)
          return;
  
        // Ignore falsey values, except false
        if (item !== false && !item)
          return;
  
        // Throw an error when trying to add an object while the itemValue option was not set
        if (typeof item === "object" && !self.objectItems)
          throw("Can't add objects when itemValue option is not set");
  
        // Ignore strings only containg whitespace
        if (item.toString().match(/^\s*$/))
          return;
  
        // If SELECT but not multiple, remove current tag
        if (self.isSelect && !self.multiple && self.itemsArray.length > 0)
          self.remove(self.itemsArray[0]);
  
        if (typeof item === "string" && this.$element[0].tagName === 'INPUT') {
          var items = item.split(',');
          if (items.length > 1) {
            for (var i = 0; i < items.length; i++) {
              this.add(items[i], true);
            }
  
            if (!dontPushVal)
              self.pushVal();
            return;
          }
        }
  
        var itemValue = self.options.itemValue(item),
            itemText = self.options.itemText(item),
            tagClass = self.options.tagClass(item);
  
        // Ignore items allready added
        var existing = $.grep(self.itemsArray, function(item) { return self.options.itemValue(item) === itemValue; } )[0];
        if (existing) {
          // Invoke onTagExists
          if (self.options.onTagExists) {
            var $existingTag = $(".tag", self.$container).filter(function() { return $(this).data("item") === existing; });
            self.options.onTagExists(item, $existingTag);
          }
          return;
        }
  
        // register item in internal array and map
        self.itemsArray.push(item);
  
        // add a tag element
        var $tag = $('<span class="tag ' + htmlEncode(tagClass) + '">' + htmlEncode(itemText) + '<span data-role="remove"></span></span>');
        $tag.data('item', item);
        self.findInputWrapper().before($tag);
        $tag.after(' ');
  
        // add <option /> if item represents a value not present in one of the <select />'s options
        if (self.isSelect && !$('option[value="' + escape(itemValue) + '"]',self.$element)[0]) {
          var $option = $('<option selected>' + htmlEncode(itemText) + '</option>');
          $option.data('item', item);
          $option.attr('value', itemValue);
          self.$element.append($option);
        }
  
        if (!dontPushVal)
          self.pushVal();
  
        // Add class when reached maxTags
        if (self.options.maxTags === self.itemsArray.length)
          self.$container.addClass('bootstrap-tagsinput-max');
  
        self.$element.trigger($.Event('itemAdded', { item: item }));
      },
  
      /**
       * Removes the given item. Pass true to dontPushVal to prevent updating the
       * elements val()
       */
      remove: function(item, dontPushVal) {
        var self = this;
  
        if (self.objectItems) {
          if (typeof item === "object")
            item = $.grep(self.itemsArray, function(other) { return self.options.itemValue(other) ==  self.options.itemValue(item); } )[0];
          else
            item = $.grep(self.itemsArray, function(other) { return self.options.itemValue(other) ==  item; } )[0];
        }
  
        if (item) {
          $('.tag', self.$container).filter(function() { return $(this).data('item') === item; }).remove();
          $('option', self.$element).filter(function() { return $(this).data('item') === item; }).remove();
          self.itemsArray.splice($.inArray(item, self.itemsArray), 1);
        }
  
        if (!dontPushVal)
          self.pushVal();
  
        // Remove class when reached maxTags
        if (self.options.maxTags > self.itemsArray.length)
          self.$container.removeClass('bootstrap-tagsinput-max');
  
        self.$element.trigger($.Event('itemRemoved',  { item: item }));
      },
  
      /**
       * Removes all items
       */
      removeAll: function() {
        var self = this;
  
        $('.tag', self.$container).remove();
        $('option', self.$element).remove();
  
        while(self.itemsArray.length > 0)
          self.itemsArray.pop();
  
        self.pushVal();
  
        if (self.options.maxTags && !this.isEnabled())
          this.enable();
      },
  
      /**
       * Refreshes the tags so they match the text/value of their corresponding
       * item.
       */
      refresh: function() {
        var self = this;
        $('.tag', self.$container).each(function() {
          var $tag = $(this),
              item = $tag.data('item'),
              itemValue = self.options.itemValue(item),
              itemText = self.options.itemText(item),
              tagClass = self.options.tagClass(item);
  
            // Update tag's class and inner text
            $tag.attr('class', null);
            $tag.addClass('tag ' + htmlEncode(tagClass));
            $tag.contents().filter(function() {
              return this.nodeType == 3;
            })[0].nodeValue = htmlEncode(itemText);
  
            if (self.isSelect) {
              var option = $('option', self.$element).filter(function() { return $(this).data('item') === item; });
              option.attr('value', itemValue);
            }
        });
      },
  
      /**
       * Returns the items added as tags
       */
      items: function() {
        return this.itemsArray;
      },
  
      /**
       * Assembly value by retrieving the value of each item, and set it on the
       * element.
       */
      pushVal: function() {
        var self = this,
            val = $.map(self.items(), function(item) {
              return self.options.itemValue(item).toString();
            });
  
        self.$element.val(val, true).trigger('change');
      },
  
      /**
       * Initializes the tags input behaviour on the element
       */
      build: function(options) {
        var self = this;
  
        self.options = $.extend({}, defaultOptions, options);
        var typeahead = self.options.typeahead || {};
  
        // When itemValue is set, freeInput should always be false
        if (self.objectItems)
          self.options.freeInput = false;
  
        makeOptionItemFunction(self.options, 'itemValue');
        makeOptionItemFunction(self.options, 'itemText');
        makeOptionItemFunction(self.options, 'tagClass');
  
        // for backwards compatibility, self.options.source is deprecated
        if (self.options.source)
          typeahead.source = self.options.source;
  
        if (typeahead.source && $.fn.typeahead) {
          makeOptionFunction(typeahead, 'source');
  
          self.$input.typeahead({
            source: function (query, process) {
              function processItems(items) {
                var texts = [];
  
                for (var i = 0; i < items.length; i++) {
                  var text = self.options.itemText(items[i]);
                  map[text] = items[i];
                  texts.push(text);
                }
                process(texts);
              }
  
              this.map = {};
              var map = this.map,
                  data = typeahead.source(query);
  
              if ($.isFunction(data.success)) {
                // support for Angular promises
                data.success(processItems);
              } else {
                // support for functions and jquery promises
                $.when(data)
                 .then(processItems);
              }
            },
            updater: function (text) {
              self.add(this.map[text]);
            },
            matcher: function (text) {
              return (text.toLowerCase().indexOf(this.query.trim().toLowerCase()) !== -1);
            },
            sorter: function (texts) {
              return texts.sort();
            },
            highlighter: function (text) {
              var regex = new RegExp( '(' + this.query + ')', 'gi' );
              return text.replace( regex, "<strong>$1</strong>" );
            }
          });
        }
  
        self.$container.on('click', $.proxy(function(event) {
          self.$input.focus();
        }, self));
  
        self.$container.on('keydown', 'input', $.proxy(function(event) {
          var $input = $(event.target),
              $inputWrapper = self.findInputWrapper();
  
          switch (event.which) {
            // BACKSPACE
            case 8:
              if (doGetCaretPosition($input[0]) === 0) {
                var prev = $inputWrapper.prev();
                if (prev) {
                  self.remove(prev.data('item'));
                }
              }
              break;
  
            // DELETE
            case 46:
              if (doGetCaretPosition($input[0]) === 0) {
                var next = $inputWrapper.next();
                if (next) {
                  self.remove(next.data('item'));
                }
              }
              break;
  
            // LEFT ARROW
            case 37:
              // Try to move the input before the previous tag
              var $prevTag = $inputWrapper.prev();
              if ($input.val().length === 0 && $prevTag[0]) {
                $prevTag.before($inputWrapper);
                $input.focus();
              }
              break;
            // RIGHT ARROW
            case 39:
              // Try to move the input after the next tag
              var $nextTag = $inputWrapper.next();
              if ($input.val().length === 0 && $nextTag[0]) {
                $nextTag.after($inputWrapper);
                $input.focus();
              }
              break;
           default:
              // When key corresponds one of the confirmKeys, add current input
              // as a new tag
              if (self.options.freeInput && $.inArray(event.which, self.options.confirmKeys) >= 0) {
                self.add($input.val());
                $input.val('');
                event.preventDefault();
              }
          }
  
          // Reset internal input's size
          $input.attr('size', Math.max(this.inputSize, $input.val().length));
        }, self));
  
        // Remove icon clicked
        self.$container.on('click', '[data-role=remove]', $.proxy(function(event) {
          self.remove($(event.target).closest('.tag').data('item'));
        }, self));
  
        // Only add existing value as tags when using strings as tags
        if (self.options.itemValue === defaultOptions.itemValue) {
          if (self.$element[0].tagName === 'INPUT') {
              self.add(self.$element.val());
          } else {
            $('option', self.$element).each(function() {
              self.add($(this).attr('value'), true);
            });
          }
        }
      },
  
      /**
       * Removes all tagsinput behaviour and unregsiter all event handlers
       */
      destroy: function() {
        var self = this;
  
        // Unbind events
        self.$container.off('keypress', 'input');
        self.$container.off('click', '[role=remove]');
  
        self.$container.remove();
        self.$element.removeData('tagsinput');
        self.$element.show();
      },
  
      /**
       * Sets focus on the tagsinput
       */
      focus: function() {
        this.$input.focus();
      },
  
      /**
       * Returns the internal input element
       */
      input: function() {
        return this.$input;
      },
  
      /**
       * Returns the element which is wrapped around the internal input. This
       * is normally the $container, but typeahead.js moves the $input element.
       */
      findInputWrapper: function() {
        var elt = this.$input[0],
            container = this.$container[0];
        while(elt && elt.parentNode !== container)
          elt = elt.parentNode;
  
        return $(elt);
      }
    };
  
    /**
     * Register JQuery plugin
     */
    $.fn.tagsinput = function(arg1, arg2) {
      var results = [];
  
      this.each(function() {
        var tagsinput = $(this).data('tagsinput');
  
        // Initialize a new tags input
        if (!tagsinput) {
          tagsinput = new TagsInput(this, arg1);
          $(this).data('tagsinput', tagsinput);
          results.push(tagsinput);
  
          if (this.tagName === 'SELECT') {
            $('option', $(this)).attr('selected', 'selected');
          }
  
          // Init tags from $(this).val()
          $(this).val($(this).val());
        } else {
          // Invoke function on existing tags input
          var retVal = tagsinput[arg1](arg2);
          if (retVal !== undefined)
            results.push(retVal);
        }
      });
  
      if ( typeof arg1 == 'string') {
        // Return the results from the invoked function calls
        return results.length > 1 ? results : results[0];
      } else {
        return results;
      }
    };
  
    $.fn.tagsinput.Constructor = TagsInput;
  
    /**
     * Most options support both a string or number as well as a function as
     * option value. This function makes sure that the option with the given
     * key in the given options is wrapped in a function
     */
    function makeOptionItemFunction(options, key) {
      if (typeof options[key] !== 'function') {
        var propertyName = options[key];
        options[key] = function(item) { return item[propertyName]; };
      }
    }
    function makeOptionFunction(options, key) {
      if (typeof options[key] !== 'function') {
        var value = options[key];
        options[key] = function() { return value; };
      }
    }
    /**
     * HtmlEncodes the given value
     */
    var htmlEncodeContainer = $('<div />');
    function htmlEncode(value) {
      if (value) {
        return htmlEncodeContainer.text(value).html();
      } else {
        return '';
      }
    }
  
    /**
     * Returns the position of the caret in the given input field
     * http://flightschool.acylt.com/devnotes/caret-position-woes/
     */
    function doGetCaretPosition(oField) {
      var iCaretPos = 0;
      if (document.selection) {
        oField.focus ();
        var oSel = document.selection.createRange();
        oSel.moveStart ('character', -oField.value.length);
        iCaretPos = oSel.text.length;
      } else if (oField.selectionStart || oField.selectionStart == '0') {
        iCaretPos = oField.selectionStart;
      }
      return (iCaretPos);
    }
  
    /**
     * Initialize tagsinput behaviour on inputs and selects which have
     * data-role=tagsinput
     */
    $(function() {
      $("input[data-role=tagsinput], select[multiple][data-role=tagsinput]").tagsinput();
    });
  })(window.jQuery);
  