/* Leaflet2 - EBERL ONLINE Merkzettelscript
 * Merkzettel zum Sammeln von Daten auf einer Webseite
 * 
 * Author: Alexander Ließmann
 * Copyright: EBERL ONLINE 2011
 */

(function($){

var settings;

$.fn.leaflet = function(options) {
	
	// Default Config
	settings = {
		leafletCookieName: 'leaflet2',
		leafletCookieExpires: 7,
		defaultHTML: '<p>Momentan befinden sich keine Einträge auf dem Merkzettel.</p>',
		leafletCookiePath: '/'
	}
	
	$.extend(true, settings, options);
	
	this.data('leaflet2', settings);
	
	this.displayLeaflet();
	
	return options;
	
}


$.fn.addToLeaflet = function(item) {

	var settings = this.data('leaflet2');
	var obj = $(item).data('leaflet2');
	
	if ( typeof obj != 'object' ) {
		if ( typeof console != 'undefined' )
			console.log('Leaflet Data is not an Object. I try to fix.');
		obj = obj.replace(/[\n\r\t]/g, '');
		obj = obj.replace(/<[^>]*>?/g, '');
		
		obj = $.parseJSON(obj);
		if ( typeof obj != 'object' && typeof console != 'undefined') {
			console.log('Hm. Not good. Couldn´t convert string to Object. Exiting...');
			return;
		}
	}
	
	
	var leafletObj = [];
	
	var leafletStr = $.cookie(settings.leafletCookieName);
	
	if ( leafletStr && leafletStr != '' ) {
		leafletObj = $.parseJSON(leafletStr);
		
		if ( this.inLeaflet(leafletObj, obj) != -1 )
			return;
	}
	
	leafletObj.push(obj);
	
	var newLeafletStr = JSON.stringify(leafletObj);
	$.cookie(settings.leafletCookieName, newLeafletStr, {expires: settings.leafletCookieExpires, path: settings.leafletCookiePath});
	
	this.displayLeaflet();
	
	if ( typeof settings.onAddToLeaflet == 'function' )
		settings.onAddToLeaflet(item, obj, leafletObj);
}


/*
 * Funktion prüft (anhand der URL), ob ein Element bereits im Merkzettel vorhanden ist
 * @param {object} leafletObj JSON
 * @param {object} obj JSON Object
 */
$.fn.inLeaflet = function(leafletObj, obj) {
	
	var ll = leafletObj.length;
	var indicator = obj.url;
	while ( ll-- )
		if ( leafletObj[ll].url == indicator ) return ll;
	
	return -1;
}


/*
 * Daten aus Leaflet holen
 */
$.fn.getLeafletData = function() {
	
	var target = this;
	var settings = target.data('leaflet2');

	var leafletStr = $.cookie(settings.leafletCookieName);
	
	if ( leafletStr && leafletStr != '' ) {
		return $.parseJSON(leafletStr);
	} else {
		return [];
	}
}


/*
 * Darstellung des Merkzettels
 */
$.fn.displayLeaflet = function() {
	
	var target = this;
	var settings = target.data('leaflet2');
	
	target.empty();
	
	var leafletStr = $.cookie(settings.leafletCookieName);
	
	var list = $('<ul></ul>');
	
	if ( leafletStr && leafletStr != '' ) {
		var leafletObj = $.parseJSON(leafletStr);
		
		var ll = leafletObj.length;
		while ( ll-- ) {
			var entry;
			
			if ( typeof settings.renderEntry == 'function' ) {
				
				entry = settings.renderEntry(leafletObj[ll]);
				
			} else {
				
				entry = $('<li><span class="delete" title="entfernen" data-leaflet2="' + leafletObj[ll].url + '">X</span><h5 class="clear"><a href="' + leafletObj[ll].url + '">' + leafletObj[ll].title + '</a></h5><p><a href="' + leafletObj[ll].url + '">' + leafletObj[ll].text + '</a></p></li>');
				
			}
			
			entry.appendTo(list);
		}
	
		var innerFilter = $('<div class="filter"></div>');
		list.appendTo(innerFilter);
		
		var box = $('<div class="box"><h4 class="boxDescription">Ihr <strong>Merkzettel</strong></h4></div>');
		innerFilter.appendTo(box);
		
		$('.delete', list).click(function(e) {
			target.deleteFromLeaflet($(e.target));
		});
		
		$(box).appendTo(target);
		
	}
	
	if ( leafletStr == '' || leafletStr == '[]' ) {
		$(settings.defaultHTML).appendTo($('.filter', target));
	}
}


/*
 * Merkzettel Funktion
 * Löscht einen Eintrag aus dem Merkzettel
 * @param {object} HTML Object
 */
$.fn.deleteFromLeaflet = function(toDelete) {
	
	var settings = $(this).data('leaflet2');
	
	var indicator = $(toDelete).data('leaflet2');
	
	var leafletStr = $.cookie(settings.leafletCookieName);
	
	if ( leafletStr && leafletStr != '' ) {
		var leafletObj = $.parseJSON(leafletStr);

		var pos = this.inLeaflet(leafletObj, {url: indicator});
		
		if ( pos != -1 ) {
			
			var deleted = leafletObj.splice(pos, 1);
			
			var newLeafletStr = JSON.stringify(leafletObj);
			$.cookie(settings.leafletCookieName, newLeafletStr, {expires: settings.leafletCookieExpires, path: settings.leafletCookiePath});
			
			this.displayLeaflet();
			
			if ( typeof settings.onDeletedFromLeaflet == 'function' )
				settings.onDeletedFromLeaflet(this, deleted, leafletObj);
		}
	}
}

})(jQuery);