/*

 * Async Treeview 0.1 - Lazy-loading extension for Treeview

 *

 * http://bassistance.de/jquery-plugins/jquery-plugin-treeview/

 *

 * Copyright 2010 Jörn Zaefferer

 * Released under the MIT license:

 *   http://www.opensource.org/licenses/mit-license.php

 */

;(function($) {

function load(settings, root, child, container) {

	function createNode(parent) {

		var current = $("<li/>").attr("id", this.id || "").html("<span>" + this.text + "</span>").appendTo(parent);

		if (this.classes) {

			current.children("span").addClass(this.classes);

		}

		if (this.expanded) {

			current.addClass("open");

		}

		if (this.hasChildren || this.children && this.children.length) {

			var branch = $("<ul/>").appendTo(current);

			if (this.hasChildren) {

				current.addClass("hasChildren");

				createNode.call({

					classes: "placeholder",

					text: " ",

					children:[]

				}, branch);

			}

			if (this.children && this.children.length) {

				$.each(this.children, createNode, [branch])

			}

		}

	}

	$.ajax($.extend(true, {

		url: settings.url,

		dataType: "json",

		data: {

			root: root

		},

		success: function(response) {

			child.empty();

			$.each(response, createNode, [child]);

	        $(container).treeview({add: child});

	    }

	}, settings.ajax));

	/*

	$.getJSON(settings.url, {root: root}, function(response) {

		function createNode(parent) {

			var current = $("<li/>").attr("id", this.id || "").html("<span>" + this.text + "</span>").appendTo(parent);

			if (this.classes) {

				current.children("span").addClass(this.classes);

			}

			if (this.expanded) {

				current.addClass("open");

			}

			if (this.hasChildren || this.children && this.children.length) {

				var branch = $("<ul/>").appendTo(current);

				if (this.hasChildren) {

					current.addClass("hasChildren");

					createNode.call({

						classes: "placeholder",

						text: " ",

						children:[]

					}, branch);

				}

				if (this.children && this.children.length) {

					$.each(this.children, createNode, [branch])

				}

			}

		}

		child.empty();

		$.each(response, createNode, [child]);

        $(container).treeview({add: child});

    });

    */

}

var proxied = $.fn.treeview;

$.fn.treeview = function(settings) {

	if (!settings.url) {

		return proxied.apply(this, arguments);

	}

	if (!settings.root) {

		settings.root = "source";

	}

	var container = this;

	if (!container.children().size())

		load(settings, settings.root, this, container);

	var userToggle = settings.toggle;

	return proxied.call(this, $.extend({}, settings, {

		collapsed: true,

		toggle: function() {

			var $this = $(this);

			if ($this.hasClass("hasChildren")) {

				var childList = $this.removeClass("hasChildren").find("ul");

				load(settings, this.id, childList, container);

			}

			if (userToggle) {

				userToggle.apply(this, arguments);

			}

		}

	}));

};

})(jQuery);