function Room(domElem, lib) {
	var players = {};
	var logins = [];

	return {
		populate: populate,
		enter: enter,
		leave: leave
	};

	function Player(name) {
		var player = {
			dom: document.createElement('li'),
			position: null
		};
    player.dom.textContent = name;
		return player;
	}

  function populate(playersList) {
    lib.clearElement(domElem);
    for(var i = 0; i < playersList.length; i++) {
			enter(playersList[i].login || "anon");
    }
  }

  function enter(name) {
		var player = Player(name);
		players[name] = player;
		player.position = lib.insert(name, logins);
		beforePlayer = logins[player.position];
		domElem.insertBefore(player.dom, beforePlayer && players[beforePlayer].dom);
		logins.splice(player.position, 0, name);
  }

	function leave(name) {
		domElem.removeChild(players[name].dom);
		logins.splice(players[name].position, 1);
	}
}