Initilize objects from DataSnapshot that conform to the Codable protocol

DataSnapsot+Extension.swift

import Firebase

extension DataSnapshot {
  
  func toObject<T:Codable>() throws -> T {
    var newValue = value as! [String: Any]
    newValue["uid"] = key
    let data = try! JSONSerialization.data(withJSONObject: newValue, options: .sortedKeys)
    return try JSONDecoder().decode(T.self, from: data)
  }
  
}

Encodable+Extension.swift

extension Encodable {
  
  func asDictionary() throws -> [String: Any] {
    let data = try JSONEncoder().encode(self)
    guard let dictionary = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any] else {
      throw NSError()
    }
    return dictionary
  }
  
}