102 lines
3.3 KiB
Swift
102 lines
3.3 KiB
Swift
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//
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// Downloader.swift
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// Passepartout-iOS
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//
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// Created by Davide De Rosa on 4/10/19.
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// Copyright (c) 2019 Davide De Rosa. All rights reserved.
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//
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// https://github.com/passepartoutvpn
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//
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// This file is part of Passepartout.
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//
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// Passepartout is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Passepartout is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Passepartout. If not, see <http://www.gnu.org/licenses/>.
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//
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import Foundation
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import MBProgressHUD
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import SwiftyBeaver
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import Passepartout_Core
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private let log = SwiftyBeaver.self
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class Downloader: NSObject {
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static let shared = Downloader(temporaryURL: GroupConstants.App.cachesURL.appendingPathComponent("downloaded.tmp"))
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private let temporaryURL: URL
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private var hud: MBProgressHUD?
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private var completionHandler: ((URL?, Error?) -> Void)?
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init(temporaryURL: URL) {
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self.temporaryURL = temporaryURL
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}
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func download(url: URL, in view: UIView, completionHandler: @escaping (URL?, Error?) -> Void) -> Bool {
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guard hud == nil else {
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log.info("Download in progress, skipping")
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return false
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}
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log.info("Downloading from: \(url)")
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let session = URLSession(configuration: .default, delegate: self, delegateQueue: .main)
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let request = URLRequest(url: url, cachePolicy: .reloadIgnoringCacheData, timeoutInterval: AppConstants.Web.timeout)
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let task = session.downloadTask(with: request)
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hud = MBProgressHUD.showAdded(to: view, animated: true)
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hud?.mode = .annularDeterminate
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hud?.progressObject = task.progress
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self.completionHandler = completionHandler
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task.resume()
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return true
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}
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}
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extension Downloader: URLSessionDelegate, URLSessionDownloadDelegate {
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func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
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if let error = error {
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log.error("Download failed: \(error)")
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hud?.hide(animated: true)
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hud = nil
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completionHandler?(nil, error)
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completionHandler = nil
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return
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}
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completionHandler = nil
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}
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func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
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log.info("Download complete!")
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if let url = downloadTask.originalRequest?.url {
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log.info("\tFrom: \(url)")
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}
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log.debug("\tTo: \(location)")
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let fm = FileManager.default
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do {
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try? fm.removeItem(at: temporaryURL)
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try fm.copyItem(at: location, to: temporaryURL)
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} catch let e {
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log.error("Failed to copy downloaded file: \(e)")
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return
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}
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hud?.hide(animated: true)
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hud = nil
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completionHandler?(temporaryURL, nil)
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completionHandler = nil
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}
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}
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