/*
	Copyright (c) 2004-2008, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/book/dojo-book-0-9/introduction/licensing
*/


if(!dojo._hasResource["dojox.dtl.contrib.data"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.dtl.contrib.data"] = true;
dojo.provide("dojox.dtl.contrib.data");
dojo.require("dojox.dtl._base");

(function(){
	var dd = dojox.dtl;
	var ddcd = dd.contrib.data;

	ddcd._BoundItem = dojo.extend(function(item, store){
		this.item = item;
		this.store = store;
	},
	{
		get: function(key){
			var store = this.store;
			var item = this.item;

			if(key == "getLabel"){
				return store.getLabel(item);
			}else if(key == "getAttributes"){
				return store.getAttributes(item);
			}else if(key == "getIdentity"){
				if(store.getIdentity){
					return store.getIdentity(item);
				}
				return "Store has no identity API";
			}else{
				if(store.hasAttribute(item, key)){
					var value = store.getValue(item, key);
					return (dojo.isObject(value) && store.isItem(value)) ? new ddcd._BoundItem(value, store) : value;
				}else if(key.slice(-1) == "s" && store.hasAttribute(item, key.slice(0, -1))){
					return dojo.map(store.getValues(item, key.slice(0, -1)), function(value){
						return (dojo.isObject(value) && store.isItem(value)) ? new ddcd._BoundItem(value, store) : value;
					});
				}
			}
		}
	});

	ddcd.BindDataNode = dojo.extend(function(items, store, alias){
		this.items = new dd._Filter(items);
		this.store = new dd._Filter(store);
		this.alias = alias;
	},
	{
		render: function(context, buffer){
			var items = this.items.resolve(context);
			var store = this.store.resolve(context);
			if(!store){
				throw new Error("data_bind didn't receive a store");
			}

			var list = [];
			if(items){
				for(var i = 0, item; item = items[i]; i++){
					list.push(new ddcd._BoundItem(item, store));
				}
			}

			context[this.alias] = list;
			return buffer;
		},
		unrender: function(context, buffer){
			return buffer;
		},
		clone: function(){
			return this;
		}
	});

	dojo.mixin(ddcd, {
		bind_data: function(parser, text){
			var parts = dd.text.pySplit(text);

			if(parts[2] != 'to' || parts[4] != 'as' || !parts[5]){
				throw new Error("data_bind expects the format: 'data_bind items to store as varName'");
			}

			return new ddcd.BindDataNode(parts[1], parts[3], parts[5]);
		}
	});

	dd.register.tags("dojox.dtl.contrib", {
		"data": ["bind_data"]
	});
})();

}
