Http Requests sample

Http.swift

import Foundation

enum Http {
    typealias Callback = (Response) -> Void

    enum Response {
        case success(data: Any?)
        case error(message: String?)
    }
    
    private struct Method {
        static let get = "GET"
        static let post = "POST"
    }
    
    case signIn(email: String, password: String)
    
    var method: String {
        switch self {
        case .signIn: return Method.post
        }
    }
    
    var uri: String {
        switch self {
        case .signIn: return "sign-in"
        }
    }
    
    var body: String? {
        switch self {
        case let .signIn(email, password): return "email=\(email)&password=\(password)"
        }
    }
    
    func request(_ callback: Callback?) {
        let url = URL(string: "https://example.com/api/\(uri)")
        
        URLSession.shared.invalidateAndCancel()
        
        var request = URLRequest(url: url!, cachePolicy: URLRequest.CachePolicy.reloadIgnoringCacheData, timeoutInterval: 30.0)
        request.httpMethod = method
        request.httpBody = body?.data(using: String.Encoding.utf8)
        
        URLSession.shared.dataTask(with: request) { (data, urlResponse, error) in
            guard error == nil else {
                callback?(.error(message: error!.localizedDescription))

                return
            }
            
            callback?(.success(data: data))
        }
        .resume()
    }
    
}

Http.signIn(email: "root@default", password: "toor")