112 lines
3.9 KiB
Swift
112 lines
3.9 KiB
Swift
//
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// Ext.swift
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// Zockerhoehle
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//
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// Created by Julian-Steffen Müller on 17.09.18.
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// Copyright © 2018 Julian-Steffen Müller. All rights reserved.
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//
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import Foundation
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// Inspired by https://gist.github.com/mbuchetics/c9bc6c22033014aa0c550d3b4324411a
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struct JSONCodingKeys: CodingKey {
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var stringValue: String
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init?(stringValue: String) {
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self.stringValue = stringValue
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}
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var intValue: Int?
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init?(intValue: Int) {
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self.init(stringValue: "\(intValue)")
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self.intValue = intValue
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}
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}
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extension KeyedDecodingContainer {
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func decode(_ type: Dictionary<String, Any>.Type, forKey key: K) throws -> Dictionary<String, Any> {
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let container = try self.nestedContainer(keyedBy: JSONCodingKeys.self, forKey: key)
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return try container.decode(type)
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}
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func decodeIfPresent(_ type: Dictionary<String, Any>.Type, forKey key: K) throws -> Dictionary<String, Any>? {
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guard contains(key) else {
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return nil
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}
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guard try decodeNil(forKey: key) == false else {
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return nil
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}
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return try decode(type, forKey: key)
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}
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func decode(_ type: Array<Any>.Type, forKey key: K) throws -> Array<Any> {
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var container = try self.nestedUnkeyedContainer(forKey: key)
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return try container.decode(type)
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}
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func decodeIfPresent(_ type: Array<Any>.Type, forKey key: K) throws -> Array<Any>? {
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guard contains(key) else {
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return nil
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}
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guard try decodeNil(forKey: key) == false else {
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return nil
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}
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return try decode(type, forKey: key)
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}
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func decode(_ type: Dictionary<String, Any>.Type) throws -> Dictionary<String, Any> {
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var dictionary = Dictionary<String, Any>()
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for key in allKeys {
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if let boolValue = try? decode(Bool.self, forKey: key) {
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dictionary[key.stringValue] = boolValue
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} else if let stringValue = try? decode(String.self, forKey: key) {
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dictionary[key.stringValue] = stringValue
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} else if let intValue = try? decode(Int.self, forKey: key) {
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dictionary[key.stringValue] = intValue
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} else if let doubleValue = try? decode(Double.self, forKey: key) {
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dictionary[key.stringValue] = doubleValue
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} else if let nestedDictionary = try? decode(Dictionary<String, Any>.self, forKey: key) {
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dictionary[key.stringValue] = nestedDictionary
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} else if let nestedArray = try? decode(Array<Any>.self, forKey: key) {
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dictionary[key.stringValue] = nestedArray
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}
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}
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return dictionary
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}
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}
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extension UnkeyedDecodingContainer {
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mutating func decode(_ type: Array<Any>.Type) throws -> Array<Any> {
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var array: [Any] = []
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while isAtEnd == false {
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// See if the current value in the JSON array is `null` first and prevent infite recursion with nested arrays.
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if try decodeNil() {
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continue
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} else if let value = try? decode(Bool.self) {
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array.append(value)
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} else if let value = try? decode(Double.self) {
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array.append(value)
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} else if let value = try? decode(String.self) {
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array.append(value)
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} else if let nestedDictionary = try? decode(Dictionary<String, Any>.self) {
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array.append(nestedDictionary)
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} else if let nestedArray = try? decode(Array<Any>.self) {
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array.append(nestedArray)
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}
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}
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return array
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}
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mutating func decode(_ type: Dictionary<String, Any>.Type) throws -> Dictionary<String, Any> {
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let nestedContainer = try self.nestedContainer(keyedBy: JSONCodingKeys.self)
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return try nestedContainer.decode(type)
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}
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}
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