2019-04-16 20:38:07 +02:00
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//
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// AddFeedViewController.swift
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// NetNewsWire
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//
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// Created by Maurice Parker on 4/16/19.
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// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
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//
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2019-04-15 22:03:05 +02:00
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import UIKit
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import Account
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import RSCore
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import RSTree
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import RSParser
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2019-04-16 23:03:30 +02:00
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class AddFeedViewController: UITableViewController, AddContainerViewControllerChild {
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@IBOutlet weak var urlTextField: UITextField!
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@IBOutlet weak var nameTextField: UITextField!
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@IBOutlet weak var folderPickerView: UIPickerView!
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@IBOutlet weak var folderLabel: UILabel!
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private var pickerData: AddFeedFolderPickerData!
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private var feedFinder: FeedFinder?
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private var userEnteredURL: URL?
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private var userEnteredFolder: Folder?
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private var userEnteredTitle: String?
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private var userEnteredAccount: Account?
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private var foundFeedURLString: String?
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private var bestFeedSpecifier: FeedSpecifier?
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private var titleFromFeed: String?
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private var userCancelled = false
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var delegate: AddContainerViewControllerChildDelegate?
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override func viewDidLoad() {
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super.viewDidLoad()
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urlTextField.autocorrectionType = .no
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urlTextField.autocapitalizationType = .none
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pickerData = AddFeedFolderPickerData()
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folderPickerView.dataSource = self
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folderPickerView.delegate = self
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folderPickerView.showsSelectionIndicator = true
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folderLabel.text = pickerData.containerNames[0]
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2019-04-16 20:38:07 +02:00
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// I couldn't figure out the gap at the top of the UITableView, so I took a hammer to it.
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tableView.contentInset = UIEdgeInsets(top: -28, left: 0, bottom: 0, right: 0)
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2019-04-15 22:03:05 +02:00
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2019-04-16 23:03:30 +02:00
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NotificationCenter.default.addObserver(self, selector: #selector(textDidChange(_:)), name: UITextField.textDidChangeNotification, object: urlTextField)
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}
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func cancel() {
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userCancelled = true
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delegate?.processingDidEnd()
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}
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func add() {
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let urlString = urlTextField.text ?? ""
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let normalizedURLString = (urlString as NSString).rs_normalizedURL()
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guard !normalizedURLString.isEmpty, let url = URL(string: normalizedURLString) else {
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delegate?.processingDidEnd()
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return
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}
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userEnteredURL = url
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userEnteredTitle = nameTextField.text
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let container = pickerData.containers[folderPickerView.selectedRow(inComponent: 0)]
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if let account = container as? Account {
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userEnteredAccount = account
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}
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if let folder = container as? Folder, let account = folder.account {
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userEnteredAccount = account
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userEnteredFolder = folder
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}
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guard let userEnteredAccount = userEnteredAccount else {
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assertionFailure()
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return
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}
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if userEnteredAccount.hasFeed(withURL: url.absoluteString) {
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showAlreadySubscribedError()
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return
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}
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delegate?.processingDidBegin()
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feedFinder = FeedFinder(url: url, delegate: self)
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}
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@objc func textDidChange(_ note: Notification) {
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delegate?.readyToAdd(state: urlTextField.text?.rs_stringMayBeURL() ?? false)
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}
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2019-04-15 22:03:05 +02:00
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}
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extension AddFeedViewController: UIPickerViewDataSource, UIPickerViewDelegate {
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func numberOfComponents(in pickerView: UIPickerView) ->Int {
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return 1
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}
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func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
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return pickerData.containerNames.count
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}
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func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
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return pickerData.containerNames[row]
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}
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func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
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folderLabel.text = pickerData.containerNames[row]
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}
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}
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extension AddFeedViewController: FeedFinderDelegate {
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public func feedFinder(_ feedFinder: FeedFinder, didFindFeeds feedSpecifiers: Set<FeedSpecifier>) {
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if userCancelled {
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return
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}
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if let error = feedFinder.initialDownloadError {
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if feedFinder.initialDownloadStatusCode == 404 {
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showNoFeedsErrorMessage()
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delegate?.processingDidEnd()
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} else {
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showInitialDownloadError(error)
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delegate?.processingDidEnd()
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}
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return
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}
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guard let bestFeedSpecifier = FeedSpecifier.bestFeed(in: feedSpecifiers) else {
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showNoFeedsErrorMessage()
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delegate?.processingDidEnd()
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return
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}
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self.bestFeedSpecifier = bestFeedSpecifier
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self.foundFeedURLString = bestFeedSpecifier.urlString
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if let url = URL(string: bestFeedSpecifier.urlString) {
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InitialFeedDownloader.download(url) { (parsedFeed) in
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self.titleFromFeed = parsedFeed?.title
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self.addFeedIfPossible(parsedFeed)
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}
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} else {
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// Shouldn't happen.
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delegate?.processingDidEnd()
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showNoFeedsErrorMessage()
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}
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}
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}
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private extension AddFeedViewController {
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private func showAlreadySubscribedError() {
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let title = NSLocalizedString("Already subscribed", comment: "Feed finder")
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let message = NSLocalizedString("Can’t add this feed because you’ve already subscribed to it.", comment: "Feed finder")
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presentError(title: title, message: message)
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}
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private func showNoFeedsErrorMessage() {
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let title = NSLocalizedString("Feed not found", comment: "Feed finder")
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let message = NSLocalizedString("Can’t add a feed because no feed was found.", comment: "Feed finder")
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presentError(title: title, message: message)
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}
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private func showInitialDownloadError(_ error: Error) {
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let title = NSLocalizedString("Download Error", comment: "Feed finder")
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let formatString = NSLocalizedString("Can’t add this feed because of a download error: “%@”", comment: "Feed finder")
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let message = NSString.localizedStringWithFormat(formatString as NSString, error.localizedDescription)
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presentError(title: title, message: message as String)
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}
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func addFeedIfPossible(_ parsedFeed: ParsedFeed?) {
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if userCancelled {
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return
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}
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guard let account = userEnteredAccount else {
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assertionFailure("Expected account.")
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delegate?.processingDidEnd()
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return
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}
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2019-04-15 22:03:05 +02:00
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guard let feedURLString = foundFeedURLString else {
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assertionFailure("Expected feedURLString.")
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delegate?.processingDidEnd()
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return
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}
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if account.hasFeed(withURL: feedURLString) {
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showAlreadySubscribedError()
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delegate?.processingDidEnd()
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return
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}
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guard let feed = account.createFeed(with: titleFromFeed, editedName: userEnteredTitle, url: feedURLString) else {
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delegate?.processingDidEnd()
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return
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}
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if let parsedFeed = parsedFeed {
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account.update(feed, with: parsedFeed, {})
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}
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account.addFeed(feed, to: userEnteredFolder)
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NotificationCenter.default.post(name: .UserDidAddFeed, object: self, userInfo: [UserInfoKey.feed: feed])
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2019-04-16 23:03:30 +02:00
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delegate?.processingDidEnd()
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}
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}
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