funcunit/site/examples/todo/js/lib/canjs-localstorage/can.localstorage.js

<!-- @hide title

can.Model('can.Model.LocalStorage', {
	// Implement local storage handling
	localStore : function (cb) {
		var name = this.name,
			data = JSON.parse(window.localStorage[name] || (window.localStorage[name] = '[]')),
			res = cb.call(this, data);
		if (res !== false) {
			can.each(data, function (todo) {
				delete todo.editing;
			});
			window.localStorage[name] = JSON.stringify(data);
		}
	},

	findAll : function (params) {
		var def = new can.Deferred();
		this.localStore(function (todos) {
			var instances = [],
				self = this;
			can.each(todos, function (todo) {
				instances.push(new self(todo));
			});
			def.resolve({data : instances});
		});
		return def;
	},

	destroy : function (id) {
		var def = new can.Deferred();
		this.localStore(function (todos) {
			for (var i = 0; i < todos.length; i++) {
				if (todos[i].id === id) {
					todos.splice(i, 1);
					break;
				}
			}
			def.resolve({});
		});
		return def;
	},

	create : function (attrs) {
		var def = new can.Deferred();
		this.localStore(function (todos) {
			attrs.id = attrs.id || parseInt(100000 * Math.random(), 10);
			todos.push(attrs);
		});
		def.resolve({id : attrs.id});
		return def;
	},

	update : function (id, attrs) {
		var def = new can.Deferred(), todo;
		this.localStore(function (todos) {
			for (var i = 0; i < todos.length; i++) {
				if (todos[i].id === id) {
					todo = todos[i];
					break;
				}
			}
			can.extend(todo, attrs);
		});
		def.resolve({});
		return def;
	}
}, {});