BasicHTTPAuth.swift

//
//  BasicHTTPAuth.swift
//  Facestar
//
//  Created by JohnP on 2/16/17.
//  Copyright © 2017 JohnP. All rights reserved.
//

import Foundation
/**
 A type that understands basic HTTP authentication: username and password.
 */
public protocol BasicHTTPAuthType {
    var username: String { get }
    var password: String { get }
}

public func == (lhs: BasicHTTPAuthType, rhs: BasicHTTPAuthType) -> Bool {
    return type(of: lhs) == type(of: rhs) &&
        lhs.username == rhs.username &&
        lhs.password == rhs.password
}

public func == (lhs: BasicHTTPAuthType?, rhs: BasicHTTPAuthType?) -> Bool {
    return type(of: lhs) == type(of: rhs) &&
        lhs?.username == rhs?.username &&
        lhs?.password == rhs?.password
}

extension BasicHTTPAuthType {
    /**
     Contents of the `Authorization` header needed to perform basic HTTP auth.
     */
    var authorizationHeader: String? {
        let string = "\(username):\(password)"
        if let data = string.data(using: .utf8) {
            let base64 = data.base64EncodedString(options: .lineLength64Characters)
            return "Basic \(base64)"
        }
        return nil
    }
}

public struct BasicHTTPAuth: BasicHTTPAuthType {
    public let username: String
    public let password: String
    
    public static let development: BasicHTTPAuthType = BasicHTTPAuth(
        username: "username",
        password: "password"
    )
    
    public init(username: String, password: String) {
        self.username = username
        self.password = password
    }
}