//
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// CodableTransform.swift
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// ObjectMapper
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//
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// Created by Jari Kalinainen on 10/10/2018.
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//
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// The MIT License (MIT)
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//
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// Copyright (c) 2014-2018 Tristan Himmelman
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Foundation
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/// Transforms JSON dictionary to Codable type T and back
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open class CodableTransform<T: Codable>: TransformType {
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public typealias Object = T
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public typealias JSON = Any
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public init() {}
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open func transformFromJSON(_ value: Any?) -> Object? {
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var _data: Data? = nil
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switch value {
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case let dict as [String : Any]:
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_data = try? JSONSerialization.data(withJSONObject: dict, options: [])
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case let array as [[String : Any]]:
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_data = try? JSONSerialization.data(withJSONObject: array, options: [])
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default:
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_data = nil
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}
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guard let data = _data else { return nil }
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do {
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let decoder = JSONDecoder()
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let item = try decoder.decode(T.self, from: data)
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return item
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} catch {
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return nil
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}
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}
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open func transformToJSON(_ value: T?) -> JSON? {
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guard let item = value else {
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return nil
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}
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do {
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let encoder = JSONEncoder()
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let data = try encoder.encode(item)
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let dictionary = try JSONSerialization.jsonObject(with: data, options: .allowFragments)
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return dictionary
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} catch {
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return nil
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}
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}
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}
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