//
//  Codable+JSON.swift
//  https://gist.github.com/KoCMoHaBTa/a5fe0bd1e3e66b5010b28c33e22397d6#file-codable-json-swift
//
//  Created by Milen Halachev on 11.06.18.
//  Copyright © 2018 Milen Halachev. All rights reserved.
//

import Foundation

extension Decodable {
    
    ///Creates an instance of the receiver from a JSON data
    public init?(json data: Data?) {
        
        guard
            let data = data
            else {
                
                return nil
        }
        
        do {
            
            let result = try JSONDecoder().decode(Self.self, from: data)
            self = result
        }
        catch {
            
            print(error)
            return nil
        }
    }
    
    ///Creates an instance of the receiver from a JSON string
    public init?(json string: String?) {
        
        guard
            let data = string?.data(using: .utf8)
            else {
                
                return nil
        }
        
        self.init(json: data)
    }
    
    ///Creates an instance of the receiver from a JSON object or array
    public init?(json object: Any?) {
        
        guard
            let object = object,
            let data = try? JSONSerialization.data(withJSONObject: object, options: [])
            else {
                
                return nil
        }
        
        self.init(json: data)
    }
}

extension Encodable {
    
    ///JSON string representation of the receiver
    public func json() -> String? {
        
        guard
            let data: Data = self.json()
            else {
                
                return nil
        }
        
        return String(data: data, encoding: .utf8)
    }
    
    ///JSON data representation of the receiver
    public func json() -> Data? {
        
        do {
            
            return try JSONEncoder().encode(self)
        }
        catch {
            
            print(error)
            return nil
        }
    }
    
    ///JSON object or array representation of the receiver
    public func json() -> Any? {
        
        guard
            let data: Data = self.json()
            else {
                
                return nil
        }
        
        return try? JSONSerialization.jsonObject(with: data, options: [])
    }
}

extension Encodable {
    
    ///JSON string representation of the receiver
    public var jsonString: String? {
        
        return self.json()
    }
    
    ///JSON data representation of the receiver
    public var jsonData: Data? {
        
        return self.json()
    }
    
    ///JSON object or array representation of the receiver
    public var jsonObject: Any? {
        
        return self.json()
    }
}