Abstract plugin pattern

jquery.abstractplugin.js

/**
	A pattern for abstract jQuery plugins

	Author: Martin Vézina 2012 http://la-grange.ca

	Licensed under the MIT license

*/
;(function ( $, window, document, undefined ) {
	
	//shim
	if (typeof Object.create !== 'function') {
		Object.create = function (o) {
			function F() {}
			F.prototype = o;
			return new F();
		};
	}
	
	var pluginName = 'myPlugin';
	var pluginNameSpace = 'myNamespace';
	var defaults = {
		autoActivate : true
	};
		
	var PluginPrototype = {
		init : function(el, options) {
			this.el = el;
			this.$el = $(el);
			this.options = $.extend({}, defaults, options);
		},
				
		foo : function(){
			
		}
	
	};
	
	$[pluginName] = function ( concreteName, bar, baz ) {
		
		var fullName = pluginNameSpace + '_' + concreteName;
		
		//create the concrete object (empty for now) which will become the prototype of all plugins for this type. This object's prototype is the Plugin prototype.
		var ConcretePlugin = Object.create(PluginPrototype);
		//now add concrete definition to our prototype
		ConcretePlugin.bar = bar;
		ConcretePlugin.baz = baz;
		ConcretePlugin.name = fullName;

		$.fn[fullName] = function(options) {
			var input = arguments;
			if ( this.length ) {
				return this.each(function () {
					//plugin is not instanciated. Create it (requires an object or null as arguments)
					if (!$.data(this, fullName)) {
						if(typeof options === 'object' || !options){
							//create an instance of our concrete plugin
							var instance = Object.create(ConcretePlugin);
							instance.init(this, options);
							$.data(this, fullName, instance);
						} else {
							$.error( 'Plugin jQuery.' + fullName + " has not yet been instanciated." );
						}
					} else if(typeof options === 'string') {
						//methods that begin with _ are private
						if(options[0]==='_') {
							$.error( 'Plugin jQuery.' + fullName + ' : method ' + options + ' is private');
							return;
						}
						
						//plugin is instanciated, get it
						var controller = $.data(this, fullName);
						if(controller[options]) {
							controller[options](Array.prototype.slice.call(input, 1));
						} else {
							$.error( 'Plugin jQuery.' + fullName + " has no method " + options);
						}
					} else {
						$.error( 'Plugin jQuery.' + fullName + " has already been instanciated.");
					}
					
				});
			}
		}

	}


})( jQuery, window, document );