gistfile1.swift

    class func createFromJson(roomObj: Dictionary<String, AnyObject>) -> Room! {

        if let id = roomObj["id"]? as? Int {
            if let name = roomObj["name"]? as? String {
                if let userObj = roomObj["user"]? as? Dictionary<String, AnyObject> {
                    if let user = User.createGuestFromJson(userObj) {
                        if let messageCount = roomObj["message_count"]? as? Int {
                            if let isRemoved = roomObj["removed"]? as? Bool {
                                if let dateString = roomObj["created_at"]? as? String {
                                    let formatter = NSDateFormatter()
                                    formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssz"
                                    if let createdAt = formatter.dateFromString(dateString) {
                                        return Room(id: String(id), name: name, user: user, messageCount: messageCount, isRemoved: isRemoved, createdAt: createdAt);
                                    }

                                }
                            }
                        }
                    }
                }
            }
        }
        return nil
    }