yreynhout/ESInTheBrowser.html

## ESInTheBrowser.html
<html>
<head>
<script src="http://cdnjs.cloudflare.com/ajax/libs/json2/20121008/json2.js"></script>
<script>
var AggregateRootEntity =
	function AggregateRootEntityConstructor(options, my) {
		var that = {},
			handlers = options.handlers || {},
			changes = [];

		my.applyChange = function applyChange(event) {
			if (event === null || event === undefined)
				throw { message: 'The event argument cannot be null or undefined.' };
			if (event.name === null || event.name === undefined)
				throw { message: 'The event name cannot be null or undefined.', event: event };
			event.data = event.data || {};
			var handler = handlers[event.name];
    		if (handler !== undefined) {
      			handler(event.data);
    		}
    		changes.push(event);
		};

		that.initialize = function initialize(events) {
			if (events === null || events === undefined)
				throw { message: 'The events argument cannot be null or undefined.' };
	  		if (that.hasChanges())
	    		throw { message: 'A changed instance cannot be initialized.' };

	  		for (var index = 0, length = events.length; index < length; index++) {
	  			var event = events[index];
	  			if (event.name === null || event.name === undefined)
					throw { message: 'The event name cannot be null or undefined.', event: event, index: index, events: events };
	  			event.data = event.data || {};
	  			var handler = handlers[event.name];
	    		if (handler !== undefined) {
	      			handler(event.data);
	    		}
	  		}
		};

		that.hasChanges = function hasChanges() {
			return changes.length !== 0;
		};

		that.clearChanges = function clearChanges() {
			changes.length = 0;
		};

		that.getChanges = function getChanges() {
			return changes.slice();
		};

		return that;
	};

var PrivateInventoryItemConstructor =
	function PrivateInventoryItemConstructor(my) {
		var my = my || { },
			state = { activated: false, id: '' };
		var that =
			new AggregateRootEntity(
			{
				handlers: {
					'InventoryItemCreated': function InventoryItemCreated(event) {
						state.id = event.Id;
			            state.activated = true;
					},
					'InventoryItemDeactivated': function InventoryItemDeactivated(event) {
			            state.activated = false;
					}
				}
			}, my);

		that.changeName = function changeName(newName) {
			if (newName === null || newName === undefined || newName === '')
				throw { message: 'The newName cannot be null, undefined or empty.' };
			my.applyChange({ name: 'InventoryItemRenamed', data: { Id: state.id, NewName: newName } });
		};

		that.remove = function remove(count) {
			if (count <= 0)
				throw { message: 'Cannot remove negative count from inventory.' };
			my.applyChange({ name: 'ItemsRemovedFromInventory', data: { Id: state.id, Count: count } });
		}

		that.checkIn = function checkIn(count) {
			if (count <= 0)
				throw { message: 'Must have a count greater than 0 to add to inventory.' };
			my.applyChange({ name: 'ItemsCheckedInToInventory', data: { Id: state.id, Count: count } });
		};

		that.deactivate = function deactivate() {
			if (state.activated === false)
				throw { message: 'Already deactivated.' };
			my.applyChange({ name: 'InventoryItemDeactivated', data: { Id: state.id } });
		};

		return that;
	};

var InventoryItem =
	function PublicInventoryItemConstructor(id, name) {
		if (name === null || name === undefined || name === '')
			throw { message: 'The name cannot be null, undefined or empty.' };

		var my = {};
		var that = PrivateInventoryItemConstructor(my);
		my.applyChange({ name: 'InventoryItemCreated', data: { Id: id, Name: name } });
		return that;
	};

var item1 = InventoryItem('item/1', 'Boxer shorts');
item1.checkIn(5);
item1.checkIn(2);
item1.deactivate();
var changes = item1.getChanges();
for(var index = 0, length = changes.length; index < length; index++) {
	console.info(JSON.stringify(changes[index]));
}

var item2 = InventoryItem('item/2', 'Shoes');
item2.checkIn(3);
item2.checkIn(1);
item2.deactivate();
var changes = item2.getChanges();
for(var index = 0, length = changes.length; index < length; index++) {
	console.info(JSON.stringify(changes[index]));
}
</script>
</head>
<body></body>
</html>
	<html>
	<head>
	<script src="http://cdnjs.cloudflare.com/ajax/libs/json2/20121008/json2.js"></script>
	<script>
	var AggregateRootEntity =
	function AggregateRootEntityConstructor(options, my) {
	var that = {},
	handlers = options.handlers \|\| {},
	changes = [];

	my.applyChange = function applyChange(event) {
	if (event === null \|\| event === undefined)
	throw { message: 'The event argument cannot be null or undefined.' };
	if (event.name === null \|\| event.name === undefined)
	throw { message: 'The event name cannot be null or undefined.', event: event };
	event.data = event.data \|\| {};
	var handler = handlers[event.name];
	if (handler !== undefined) {
	handler(event.data);
	}
	changes.push(event);
	};

	that.initialize = function initialize(events) {
	if (events === null \|\| events === undefined)
	throw { message: 'The events argument cannot be null or undefined.' };
	if (that.hasChanges())
	throw { message: 'A changed instance cannot be initialized.' };

	for (var index = 0, length = events.length; index < length; index++) {
	var event = events[index];
	if (event.name === null \|\| event.name === undefined)
	throw { message: 'The event name cannot be null or undefined.', event: event, index: index, events: events };
	event.data = event.data \|\| {};
	var handler = handlers[event.name];
	if (handler !== undefined) {
	handler(event.data);
	}
	}
	};

	that.hasChanges = function hasChanges() {
	return changes.length !== 0;
	};

	that.clearChanges = function clearChanges() {
	changes.length = 0;
	};

	that.getChanges = function getChanges() {
	return changes.slice();
	};

	return that;
	};

	var PrivateInventoryItemConstructor =
	function PrivateInventoryItemConstructor(my) {
	var my = my \|\| { },
	state = { activated: false, id: '' };
	var that =
	new AggregateRootEntity(
	{
	handlers: {
	'InventoryItemCreated': function InventoryItemCreated(event) {
	state.id = event.Id;
	state.activated = true;
	},
	'InventoryItemDeactivated': function InventoryItemDeactivated(event) {
	state.activated = false;
	}
	}
	}, my);

	that.changeName = function changeName(newName) {
	if (newName === null \|\| newName === undefined \|\| newName === '')
	throw { message: 'The newName cannot be null, undefined or empty.' };
	my.applyChange({ name: 'InventoryItemRenamed', data: { Id: state.id, NewName: newName } });
	};

	that.remove = function remove(count) {
	if (count <= 0)
	throw { message: 'Cannot remove negative count from inventory.' };
	my.applyChange({ name: 'ItemsRemovedFromInventory', data: { Id: state.id, Count: count } });
	}

	that.checkIn = function checkIn(count) {
	if (count <= 0)
	throw { message: 'Must have a count greater than 0 to add to inventory.' };
	my.applyChange({ name: 'ItemsCheckedInToInventory', data: { Id: state.id, Count: count } });
	};

	that.deactivate = function deactivate() {
	if (state.activated === false)
	throw { message: 'Already deactivated.' };
	my.applyChange({ name: 'InventoryItemDeactivated', data: { Id: state.id } });
	};

	return that;
	};

	var InventoryItem =
	function PublicInventoryItemConstructor(id, name) {
	if (name === null \|\| name === undefined \|\| name === '')
	throw { message: 'The name cannot be null, undefined or empty.' };

	var my = {};
	var that = PrivateInventoryItemConstructor(my);
	my.applyChange({ name: 'InventoryItemCreated', data: { Id: id, Name: name } });
	return that;
	};

	var item1 = InventoryItem('item/1', 'Boxer shorts');
	item1.checkIn(5);
	item1.checkIn(2);
	item1.deactivate();
	var changes = item1.getChanges();
	for(var index = 0, length = changes.length; index < length; index++) {
	console.info(JSON.stringify(changes[index]));
	}

	var item2 = InventoryItem('item/2', 'Shoes');
	item2.checkIn(3);
	item2.checkIn(1);
	item2.deactivate();
	var changes = item2.getChanges();
	for(var index = 0, length = changes.length; index < length; index++) {
	console.info(JSON.stringify(changes[index]));
	}
	</script>
	</head>
	<body></body>
	</html>