Tusker/Tusker/XCallbackURL/XCBSession.swift

//
//  XCBSession.swift
//  Tusker
//
//  Created by Shadowfacts on 9/23/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit

class XCBSession {
    static let encoder = JSONEncoder()
    
    let type: XCBActionType
    let request: XCBRequest
    
    init(type: XCBActionType, request: XCBRequest) {
        self.type = type
        self.request = request
    }
    
    func complete(with result: XCBSessionResult, additionalData: [String: String?]? = nil) {
        guard var url = result == .success ? request.success : result == .error ? request.error : request.cancel else { return }
        XCBManager.currentSession = nil
        if let additionalData = additionalData {
            var components = URLComponents(url: url, resolvingAgainstBaseURL: true)!
            components.queryItems = components.queryItems ?? []
            if request.json {
                let data = try! XCBSession.encoder.encode(additionalData)
                let response = String(data: data, encoding: .utf8)
                components.queryItems!.append(URLQueryItem(name: "response", value: response))
            } else {
                components.queryItems!.append(contentsOf: additionalData.map(URLQueryItem.init))
            }
            url = components.url!
        }
        DispatchQueue.main.async {
            UIApplication.shared.open(url, options: [:])
        }
    }
}

enum XCBSessionResult {
    case success, error, cancel
}