Basic feed functionality

(function ($) {
	"use strict";

	function buildTemplate(data) { // Build the template (you should use a microtemplating engine)
		return "<div>" + data.toString() + "</div>";
	}

	var Feed = function (url) {
		this.events = {};
		this.url = url;
		this.items = {};
	};

	$.extend(Feed.prototype, {
		onAppend: function (callback, context) {
			this.bind("append", callback, context);
		},

		onRemove: function (callback, context) {
			this.bind("remove", callback, context);
		},

		init: function () {
			this.offset = 0;
			this.get(10);
		},

		bind: function (eventType, callback, context) {
			if (!this.events.hasOwnProperty(eventType)) {
				this.events[eventType] = [];
			}

			this.events[eventType].push({
				callback: callback,
				context: context
			});
		},

		trigger: function (eventType, data) {
			var i;

			if (this.events.hasOwnProperty(eventType)) {
				for (i = 0; i < this.events[eventType].length; i++) {
					this.events[eventType][i].callback.call(this.events[eventType][i].context, data);
				}
			}
		},

		get: function (count) {
			var self = this,
				i;

			$.ajax({
				url: this.url + "?count=" + count + "&offset=" + this.offset,
				success: function (data) {
					if ($.isArray(data)) {
						for (i = 0; i < data.length; i++) {
							if (data.hasOwnProperty("id")) {
								self.items[data.id] = data[i];
								self.trigger("append", data[i]);
							}
						}

						self.offset += data.length;
					}
				}
			});
		}
	});

	$(function () {
		var myFeed = new Feed(document.location.href),
			feedDisplay = $("#feed");

		myFeed.init();
		feedDisplay.items = {};

		myFeed.onAppend(function (itemData) {
			if (itemData.hasOwnProperty("id")) {
				feedDisplay.items[itemData.id] = $(buildTemplate(itemData));
				feedDisplay.append(feedDisplay.items[itemData.id]);
			}
		});

		myFeed.onRemove(function (itemData) {
			if (itemData.hasOwnProperty("id") && feedDisplay.items.hasOwnProperty(itemData.id)) {
				feedDisplay.items[itemData.id].remove();
				delete feedDisplay.items[itemData.id];
			}
		});
	});
}(window.jQuery));