REALM Generic data fetch

realm_generic_network.swift

protocol APIProtocol {
    init(_ j: [String: Any])
}

extension APIWrapper {
        func getAllObjectsOf<T: APIProtocol>(type: T.Type, request: URLRequestConvertible, _ completion: @escaping (_ result: (T.Type, ResultState)) -> Void) {
                Alamofire.request(request).validate().response { response in
                    do {
                        if let data = response.data {

                            let objs : [[String: Any]]  = try JSONSerialization.jsonObject(with: data, options: []) as! [[String:Any]]
                            let realm = try Realm()
                            realm.beginWrite()

                            objs.forEach({ objectJSON in
                                let object = type.init(objectJSON)
                                realm.add(object as! Object, update: true)
                            })

                            try realm.commitWrite()
                            completion((type, ResultState.success))

                        } else {
                            completion((type, ResultState.failure(APIError(code: "I-1", message: "API did not return data"))))
                        }

                    }catch(let e) {
                        completion((type, ResultState.failure(APIError(code: "I-2", message: e.localizedDescription))))
                    }
                }
            }
}