JSONCoder.swift

//
//  JSONCoder.swift
//
//  Created by Masakazu Ohtsuka on 2015/09/14.
//  Copyright © 2015年 maaash.jp. All rights reserved.
//

import Foundation
import SwiftyJSON

struct JSONArchiver<V :JSONCoding> {
    static func archiveValue(value :V, toFile fileURL :NSURL) throws -> Bool {
        let json = value.serialize()
        let data = try json.rawData() // rethrows
        return data.writeToURL(fileURL, atomically: true)
    }
}

protocol JSONCoding {
    init (json :JSON)
    func serialize () -> JSON
}

extension JSONCoding {
    init? (jsonURL :NSURL) {
        guard let data = NSData(contentsOfURL: jsonURL) else { return nil }

        let json = JSON(data: data)
        self.init(json: json)
    }
}