element-ios/Riot/Utils/DictionaryEncodable.swift

43 lines
1.4 KiB
Swift

//
// Copyright 2022 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import Foundation
/// A type that can encode itself into a `[String: Any]` JSON dictionary.
protocol DictionaryEncodable: Encodable { }
enum DictionaryEncodableError: Error {
/// The value returned an unexpected type from `JSONSerialization`.
case typeError
}
extension DictionaryEncodable {
/// Returns self encoded as a JSON dictionary.
func dictionary() throws -> [String: Any] {
let jsonData = try JSONEncoder().encode(self)
let object = try JSONSerialization.jsonObject(with: jsonData)
guard let dictionary = object as? [String: Any] else {
MXLog.error("[DictionaryEncodable] Unexpected type decoded, expected a Dictionary.", context: [
"type": type(of: object)
])
throw DictionaryEncodableError.typeError
}
return dictionary
}
}