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/*!
 * jQuery ComboTree Plugin 
 * Author:  Erhan FIRAT
 * Mail:    erhanfirat@gmail.com
 * Licensed under the MIT license
 * Version: 1.2.1
 */


;(function ( $, window, document, undefined ) {
    
    // Default settings
    var comboTreePlugin = 'comboTree',
        defaults = {
            source: [], 
            isMultiple: false, 
            cascadeSelect: false,
            selected: [],
            collapse: false
        };

    // LIFE CYCLE
    function ComboTree( element, options ) {

        this.options = $.extend( {}, defaults, options) ;
        this._defaults = defaults;
        this._name = comboTreePlugin;

        this.constructorFunc(element, options);
    }

    ComboTree.prototype.constructorFunc = function(element, options){
        this.elemInput = element;
        this._elemInput = $(element);

        this.init();
    }

    ComboTree.prototype.init = function () {
        // Setting Doms
        this.comboTreeId = 'comboTree' + Math.floor(Math.random() * 999999);

        this._elemInput.addClass('comboTreeInputBox');

        if (this._elemInput.attr('id') === undefined)
            this._elemInput.attr('id', this.comboTreeId + 'Input');
        this.elemInputId = this._elemInput.attr('id');

        this._elemInput.wrap('<div id="'+ this.comboTreeId + 'Wrapper" class="comboTreeWrapper"></div>');
        this._elemInput.wrap('<div id="'+ this.comboTreeId + 'InputWrapper" class="comboTreeInputWrapper"></div>');
        this._elemWrapper = $('#' + this.comboTreeId + 'Wrapper');

        this._elemArrowBtn = $('<div id="' + this.comboTreeId + 'ArrowBtn" class="comboTreeArrowBtn" type="button"><span class="comboTreeArrowBtnImg">▼</span></div>');
        this._elemInput.after(this._elemArrowBtn);
        this._elemWrapper.append('<div id="' + this.comboTreeId + 'DropDownContainer" class="comboTreeDropDownContainer"><div class="comboTreeDropDownContent"></div>');
        
        // DORP DOWN AREA
        this._elemDropDownContainer = $('#' + this.comboTreeId + 'DropDownContainer');

        this._elemDropDownContainer.html(this.createSourceHTML());
        this._elemFilterInput = this.options.isMultiple ? $('#' + this.comboTreeId + 'MultiFilter') : null;
        this._elemSourceUl = $('#' + this.comboTreeId + 'ComboTreeSourceUl');
        
        this._elemItems = this._elemDropDownContainer.find('li');
        this._elemItemsTitle = this._elemDropDownContainer.find('span.comboTreeItemTitle');

        // VARIABLES
        this._selectedItem = {};
        this._selectedItems = [];

        this.processSelected();

        this.bindings();
    };

    ComboTree.prototype.unbind = function () {
        this._elemArrowBtn.off('click');
        this._elemInput.off('click');
        this._elemItems.off('click');
        this._elemItemsTitle.off('click');
        this._elemItemsTitle.off("mousemove");
        this._elemInput.off('keyup');
        this._elemInput.off('keydown');
        this._elemInput.off('mouseup.' + this.comboTreeId);
        $(document).off('mouseup.' + this.comboTreeId);
    }

    ComboTree.prototype.destroy = function () {
        this.unbind();
        this._elemWrapper.before(this._elemInput);
        this._elemWrapper.remove();
        //this._elemInput.removeData('plugin_' + comboTreePlugin);
    }



    // CREATE DOM HTMLs

    ComboTree.prototype.removeSourceHTML = function () {
        this._elemDropDownContainer.html('');
    };

    ComboTree.prototype.createSourceHTML = function () {
        var sourceHTML = '';
        if (this.options.isMultiple)
            sourceHTML = this.createFilterHTMLForMultiSelect();
        sourceHTML += this.createSourceSubItemsHTML(this.options.source);
        return sourceHTML;
    };

    ComboTree.prototype.createFilterHTMLForMultiSelect = function (){
        return '<input id="' + this.comboTreeId + 'MultiFilter" type="text" class="multiplesFilter" placeholder="Type to filter"/>';
    }

    ComboTree.prototype.createSourceSubItemsHTML = function (subItems, parentId) {
        var subItemsHtml = '<UL id="' + this.comboTreeId + 'ComboTreeSourceUl' + (parentId ? parentId : 'main' ) + '" style="' + ((this.options.collapse && parentId) ? 'display:none;' : '')  + '">';
        for (var i=0; i<subItems.length; i++){
            subItemsHtml += this.createSourceItemHTML(subItems[i]);
        }
        subItemsHtml += '</UL>'
        return subItemsHtml;
    }

    ComboTree.prototype.createSourceItemHTML = function (sourceItem) {
        var itemHtml = "",
            isThereSubs = sourceItem.hasOwnProperty("subs");
        
        itemHtml = '<LI id="' + this.comboTreeId + 'Li' + sourceItem.id + '" class="ComboTreeItem' + (isThereSubs?'Parent':'Chlid') + '"> ';
        
        if (isThereSubs)
            itemHtml += '<span class="comboTreeParentPlus">' + (this.options.collapse ? '+' : '&minus;') + '</span>';

        if (this.options.isMultiple)
            itemHtml += '<span data-id="' + sourceItem.id + '" class="comboTreeItemTitle"><input type="checkbox">' + sourceItem.title + '</span>';
        else
            itemHtml += '<span data-id="' + sourceItem.id + '" class="comboTreeItemTitle">' + sourceItem.title + '</span>';

        if (isThereSubs)
            itemHtml += this.createSourceSubItemsHTML(sourceItem.subs, sourceItem.id);

        itemHtml += '</LI>';
        return itemHtml;
    };


    // BINDINGS

    ComboTree.prototype.bindings = function () {
        var _this = this;

        $(this._elemInput).focus(function (e) {
            if (!_this._elemDropDownContainer.is(':visible'))
                $(_this._elemDropDownContainer).slideToggle(100);
        });

        this._elemArrowBtn.on('click', function(e){
            e.stopPropagation();
            _this.toggleDropDown();
        });
        this._elemInput.on('click', function(e){
            e.stopPropagation();
            if (!_this._elemDropDownContainer.is(':visible'))
                _this.toggleDropDown();
        });
        this._elemItems.on('click', function(e){
            e.stopPropagation();
            if ($(this).hasClass('ComboTreeItemParent')){
                _this.toggleSelectionTree(this);
            }
        });        
        this._elemItemsTitle.on('click', function(e){
            e.stopPropagation();
            if (_this.options.isMultiple)
                _this.multiItemClick(this);
            else
                _this.singleItemClick(this);
        });
        this._elemItemsTitle.on("mousemove", function (e) {
            e.stopPropagation();
            _this.dropDownMenuHover(this);
        });

        // KEY BINDINGS
        this._elemInput.on('keyup', function(e) {
            e.stopPropagation();

            switch (e.keyCode) {
                case 27:
                    _this.closeDropDownMenu(); break;
                case 13:                  
                case 39: case 37: case 40: case 38:
                    e.preventDefault(); 
                    break;
                default: 
                    if (!_this.options.isMultiple)
                        _this.filterDropDownMenu();
                    break;
            }
        });

        this._elemFilterInput && this._elemFilterInput.on('keyup', function (e) {
            e.stopPropagation();

            switch (e.keyCode) {
                case 27:
                    if ($(this).val()) {
                        $(this).val('');
                        _this.filterDropDownMenu();
                    } else {
                        _this.closeDropDownMenu();
                    }
                    break;
                case 40: case 38:
                    e.preventDefault();
                    _this.dropDownInputKeyControl(e.keyCode - 39); break;
                case 37: case 39:
                    e.preventDefault();
                    _this.dropDownInputKeyToggleTreeControl(e.keyCode - 38);
                    break;
                case 13:
                    _this.multiItemClick(_this._elemHoveredItem);
                    e.preventDefault();
                    break;
                default:
                    _this.filterDropDownMenu();
                    break;
            }
        });

        this._elemInput.on('keydown', function(e) {
            e.stopPropagation();

            switch (e.keyCode) {
            case 9:
                _this.closeDropDownMenu(); break;
            case 40: case 38:
                e.preventDefault(); 
                _this.dropDownInputKeyControl(e.keyCode - 39); break;
            case 37: case 39:
                e.preventDefault(); 
                _this.dropDownInputKeyToggleTreeControl(e.keyCode - 38);
                break;
            case 13:
                if (_this.options.isMultiple)
                    _this.multiItemClick(_this._elemHoveredItem);
                else
                    _this.singleItemClick(_this._elemHoveredItem);
                e.preventDefault(); 
                break;
            default: 
                if (_this.options.isMultiple)
                    e.preventDefault();
        }
        });


        // ON FOCUS OUT CLOSE DROPDOWN
        $(document).on('mouseup.' + _this.comboTreeId, function (e){
            if (!_this._elemWrapper.is(e.target) && _this._elemWrapper.has(e.target).length === 0 && _this._elemDropDownContainer.is(':visible'))
                _this.closeDropDownMenu();
        });
    };





    // EVENTS HERE

    // DropDown Menu Open/Close
    ComboTree.prototype.toggleDropDown = function () {
        let _this = this;
        $(this._elemDropDownContainer).slideToggle(100, function () {
            if (_this._elemDropDownContainer.is(':visible'))
                $(_this._elemInput).focus();
        });
    };

    ComboTree.prototype.closeDropDownMenu = function () {
        $(this._elemDropDownContainer).slideUp(100);
    };

    // Selection Tree Open/Close
    ComboTree.prototype.toggleSelectionTree = function (item, direction) {
        var subMenu = $(item).children('ul')[0];
        if (direction === undefined){
            if ($(subMenu).is(':visible'))
                $(item).children('span.comboTreeParentPlus').html("+");
            else
                $(item).children('span.comboTreeParentPlus').html("&minus;");

            $(subMenu).slideToggle(50);
        }
        else if (direction == 1 && !$(subMenu).is(':visible')){
                $(item).children('span.comboTreeParentPlus').html("&minus;");
                $(subMenu).slideDown(50);
        }
        else if (direction == -1){
            if ($(subMenu).is(':visible')){
                $(item).children('span.comboTreeParentPlus').html("+");
                $(subMenu).slideUp(50);
            }
            else {
                this.dropDownMenuHoverToParentItem(item);
            }
        }
            
    };


    // SELECTION FUNCTIONS
	ComboTree.prototype.selectMultipleItem = function(ctItem){
		this._selectedItem = {
            id: $(ctItem).attr("data-id"),
            title: $(ctItem).text()
        };

        let check = this.isItemInArray(this._selectedItem, this.options.source);
        if (check) {
            var index = this.isItemInArray(this._selectedItem, this._selectedItems);
            if (index) {
                this._selectedItems.splice(parseInt(index), 1);
                $(ctItem).find("input").prop('checked', false);
            } else {
                this._selectedItems.push(this._selectedItem);
                $(ctItem).find("input").prop('checked', true);
            }
        }
	};
	
    ComboTree.prototype.singleItemClick = function (ctItem) {
        this._selectedItem = {
            id: $(ctItem).attr("data-id"),
            title: $(ctItem).text()
        };

        this.refreshInputVal();
        this.closeDropDownMenu();
    };

    ComboTree.prototype.multiItemClick = function (ctItem) {
        this.selectMultipleItem(ctItem);
		if(this.options.cascadeSelect){
			if ($(ctItem).parent('li').hasClass('ComboTreeItemParent')){
				var subMenu = $(ctItem).parent('li').children('ul').first().find('input[type="checkbox"]');
				subMenu.each(function() {
					var $input = $(this)
					if($(ctItem).children('input[type="checkbox"]').first().prop("checked")!==$input.prop('checked')){
					$input.prop('checked', !$(ctItem).children('input[type="checkbox"]').first().prop("checked"));
					$input.trigger('click');
					}
				});
			}
		}
        this.refreshInputVal();
    };
	

    // recursive search for item in arr
    ComboTree.prototype.isItemInArray = function (item, arr) {
        for (var i=0; i<arr.length; i++) {
            if (item.id == arr[i].id && item.title == arr[i].title)
                return i + "";

            if (arr[i].hasOwnProperty("subs")) {
                let found = this.isItemInArray(item, arr[i].subs);
                if (found)
                    return found;
            }
        }
        return false;
    };

    ComboTree.prototype.refreshInputVal = function () {
        var tmpTitle = "";
        
        if (this.options.isMultiple) {
            for (var i=0; i<this._selectedItems.length; i++){
                tmpTitle += this._selectedItems[i].title;
                if (i<this._selectedItems.length-1)
                    tmpTitle += ", ";
            }
        }
        else {
            tmpTitle = this._selectedItem.title;
        }

        this._elemInput.val(tmpTitle);
        this._elemInput.trigger('change');

        if (this.changeHandler)
            this.changeHandler();
    };

    ComboTree.prototype.dropDownMenuHover = function (itemSpan, withScroll) {
        this._elemItems.find('span.comboTreeItemHover').removeClass('comboTreeItemHover');
        $(itemSpan).addClass('comboTreeItemHover');
        this._elemHoveredItem = $(itemSpan);
        if (withScroll)
            this.dropDownScrollToHoveredItem(this._elemHoveredItem);
    }

    ComboTree.prototype.dropDownScrollToHoveredItem = function (itemSpan) {
        var curScroll = this._elemSourceUl.scrollTop();
        this._elemSourceUl.scrollTop(curScroll + $(itemSpan).parent().position().top - 80);
    }

    ComboTree.prototype.dropDownMenuHoverToParentItem = function (item) {
        var parentSpanItem = $($(item).parents('li.ComboTreeItemParent')[0]).children("span.comboTreeItemTitle");
        if (parentSpanItem.length)
            this.dropDownMenuHover(parentSpanItem, true);
        else 
            this.dropDownMenuHover(this._elemItemsTitle[0], true);
    }

    ComboTree.prototype.dropDownInputKeyToggleTreeControl = function (direction) {
        var item = this._elemHoveredItem;
        if ($(item).parent('li').hasClass('ComboTreeItemParent'))
            this.toggleSelectionTree($(item).parent('li'), direction);
        else if (direction == -1)
            this.dropDownMenuHoverToParentItem(item);
    }

    ComboTree.prototype.dropDownInputKeyControl = function (step) {
        if (!this._elemDropDownContainer.is(":visible")) 
            this.toggleDropDown();

        var list = this._elemItems.find("span.comboTreeItemTitle:visible");
        i = this._elemHoveredItem?list.index(this._elemHoveredItem) + step:0;
        i = (list.length + i) % list.length;

        this.dropDownMenuHover(list[i], true);        
    },

    ComboTree.prototype.filterDropDownMenu = function () {
        var searchText =  '';
        if (!this.options.isMultiple)
            searchText = this._elemInput.val();
        else
            searchText = $("#" + this.comboTreeId + "MultiFilter").val();

        if (searchText != ""){
            this._elemItemsTitle.hide();
            this._elemItemsTitle.siblings("span.comboTreeParentPlus").hide();
            list = this._elemItems
                .filter((index, item) => {
                    return item.innerHTML.toLowerCase().indexOf(searchText.toLowerCase()) != -1;
                })
                .each(function (i, elem) {
                    $(this.children).show()
                    $(this).siblings("span.comboTreeParentPlus").show();
                });
        }
        else{
            this._elemItemsTitle.show();
            this._elemItemsTitle.siblings("span.comboTreeParentPlus").show();
        }
    }

    ComboTree.prototype.processSelected = function () {
        let elements = this._elemItemsTitle;
        let selectedItem = this._selectedItem;
        let selectedItems = this._selectedItems;
        this.options.selected.forEach(function(element) {
            let selected = $(elements).filter(function(){
                return $(this).data('id') == element;
            });

            if(selected.length > 0){
                $(selected).find('input').attr('checked', true);

                selectedItem = {
                    id: selected.data("id"),
                    title: selected.text()
                };
                selectedItems.push(selectedItem);
            }
        });
	    
    	//Without this it doesn't work
    	this._selectedItem = selectedItem;

        this.refreshInputVal();
    };


    // METHODS


    ComboTree.prototype.findItembyId = function(itemId, source) {
        if (itemId && source) {
            for (let i=0; i<source.length; i++) {
                if (source[i].id == itemId)
                    return {id: source[i].id, title: source[i].title};
                if (source[i].hasOwnProperty("subs")) {
                    let found = this.findItembyId(itemId, source[i].subs);
                    if (found)
                        return found;
                }
            }
        }
        return null;
    }

    // Returns selected id array or null
    ComboTree.prototype.getSelectedIds = function () {
        if (this.options.isMultiple && this._selectedItems.length>0){
            var tmpArr = [];
            for (i=0; i<this._selectedItems.length; i++)
                tmpArr.push(this._selectedItems[i].id);

            return tmpArr;
        }
        else if (!this.options.isMultiple && this._selectedItem.hasOwnProperty('id')){
            return [this._selectedItem.id];
        }
        return null;
    };

    // Retuns Array (multiple), Integer (single), or False (No choice)
    ComboTree.prototype.getSelectedNames = function () {
        if (this.options.isMultiple && this._selectedItems.length>0){
            var tmpArr = [];
            for (i=0; i<this._selectedItems.length; i++)
                tmpArr.push(this._selectedItems[i].title);

            return tmpArr;
        }
        else if (!this.options.isMultiple && this._selectedItem.hasOwnProperty('id')){
            return this._selectedItem.title;
        }
        return null;
    };

    ComboTree.prototype.setSource = function(source) {
        this._selectedItems = [];

        this.destroy();
        this.options.source = source;
        this.constructorFunc(this.elemInput, this.options);
    };

    ComboTree.prototype.clearSelection = function() {
        for (i=0; i<this._selectedItems.length; i++) {
            let itemElem = $("#" + this.comboTreeId + 'Li' + this._selectedItems[i].id);
            $(itemElem).find("input").prop('checked', false);
        }
        this._selectedItems = [];
        this.refreshInputVal();
    };

    ComboTree.prototype.setSelection = function (selectionIdList) {
        if (selectionIdList && selectionIdList.length && selectionIdList.length > 0) {
            for (let i = 0; i < selectionIdList.length; i++) {
                let selectedItem = this.findItembyId(selectionIdList[i], this.options.source);

                if (selectedItem) {
                    let check = this.isItemInArray(selectedItem, this.options.source);
                    if (check) {
                        var index = this.isItemInArray(selectedItem, this._selectedItems);
                        if (!index) {
                            let selectedItemElem = $("#" + this.comboTreeId + 'Li' + selectionIdList[i]);

                            this._selectedItems.push(selectedItem);
                            $(selectedItemElem).find("input").prop('checked', true);
                        }
                    }
                }
            }
        }

        this.refreshInputVal();
    };


    // EVENTS

    ComboTree.prototype.onChange = function(callBack) {
        if (callBack && typeof callBack === "function")
            this.changeHandler = callBack;
    };



    // -----

    $.fn[comboTreePlugin] = function (options) {
        var ctArr = [];
        this.each(function () {
            if (!$.data(this, 'plugin_' + comboTreePlugin)) {
               $.data(this, 'plugin_' + comboTreePlugin, new ComboTree( this, options));
               ctArr.push($(this).data()['plugin_' + comboTreePlugin]);
            }
        });

        if (this.length == 1)
            return ctArr[0];
        else
            return ctArr;
    }

})( jQuery, window, document );