extention NSDictionary for json

extension NSDictionary {

	func lastof(path: String) -> Any? {
		var r: NSDictionary? = self
		let ar = path.components(separatedBy: "/")
		for a in ar.dropLast() {
			if a.isEmpty { continue }
			r = r?[a] as? NSDictionary
			if r == nil { return nil }
		}
		guard let last = ar.last else { return nil }
		return r?[last]
	}

	func string(path: String) -> String? { return lastof(path: path) as? String }
	func array(path: String) -> NSArray? { return lastof(path: path) as? NSArray }
	func dictionary(path: String) -> NSDictionary? { return lastof(path: path) as? NSDictionary }

	func int(path: String) -> Int? {
		let r = lastof(path: path)
		if let s = r as? String { return Int(s) }
		return r as? Int
	}

	func bool(path: String) -> Bool? {
		let r = lastof(path: path)
		if let s = r as? String { return s.lowercased() == "true" || Int(s) != 0 }
		return r as? Bool
	}

	var jsonData: Data? { return try? JSONSerialization.data(withJSONObject: self, options: []) }
	var jsonString: String? {
		guard let d = jsonData else { return nil }
		return String(data: d, encoding: .utf8)
	}
}

public extension Data {
	var json: Any? { return (try? JSONSerialization.jsonObject(with: self, options: .allowFragments)) }
	var jsonDictionary: NSDictionary? { return json as? NSDictionary }
}