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240 lines
6.3 KiB
Swift
240 lines
6.3 KiB
Swift
//
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// AddFeedController.swift
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// Evergreen
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//
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// Created by Brent Simmons on 8/28/16.
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// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
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//
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import Cocoa
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import RSCore
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import RSTree
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import Data
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import RSFeedFinder
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import Account
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// Run add-feed sheet.
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// If it returns with URL and optional name,
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// run FeedFinder plus modal progress window.
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// If FeedFinder returns feed,
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// add feed.
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// Else,
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// display error sheet.
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let UserDidAddFeedNotification = Notification.Name("UserDidAddFeedNotification")
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let UserDidAddFeedKey = "feed"
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class AddFeedController: AddFeedWindowControllerDelegate, FeedFinderDelegate {
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fileprivate let hostWindow: NSWindow
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fileprivate var addFeedWindowController: AddFeedWindowController?
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fileprivate var userEnteredURL: URL?
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fileprivate var userEnteredFolder: Folder?
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fileprivate var userEnteredTitle: String?
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fileprivate var foundFeedURLString: String?
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fileprivate var titleFromFeed: String?
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fileprivate var feedFinder: FeedFinder?
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fileprivate var isFindingFeed = false
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fileprivate var bestFeedSpecifier: FeedSpecifier?
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init(hostWindow: NSWindow) {
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self.hostWindow = hostWindow
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}
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func showAddFeedSheet(_ urlString: String?, _ name: String?) {
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let folderTreeControllerDelegate = FolderTreeControllerDelegate()
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let rootNode = Node(representedObject: AccountManager.shared.localAccount, parent: nil)
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rootNode.canHaveChildNodes = true
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let folderTreeController = TreeController(delegate: folderTreeControllerDelegate, rootNode: rootNode)
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addFeedWindowController = AddFeedWindowController(urlString: urlString ?? urlStringFromPasteboard, name: name, folderTreeController: folderTreeController, delegate: self)
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addFeedWindowController!.runSheetOnWindow(hostWindow)
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}
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// MARK: AddFeedWindowControllerDelegate
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func addFeedWindowController(_: AddFeedWindowController, userEnteredURL url: URL, userEnteredTitle title: String?, folder: Folder) {
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closeAddFeedSheet(NSApplication.ModalResponse.OK)
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assert(folder.account != nil, "Folder must have an account.")
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let account = folder.account ?? AccountManager.shared.localAccount
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if account.hasFeed(withURL: url.absoluteString) {
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showAlreadySubscribedError(url.absoluteString, folder)
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return
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}
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userEnteredURL = url
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userEnteredFolder = folder
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userEnteredTitle = title
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findFeed()
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}
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func addFeedWindowControllerUserDidCancel(_: AddFeedWindowController) {
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closeAddFeedSheet(NSApplication.ModalResponse.cancel)
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}
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// MARK: FeedFinderDelegate
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public func feedFinder(_ feedFinder: FeedFinder, didFindFeeds feedSpecifiers: Set<FeedSpecifier>) {
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isFindingFeed = false
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endShowingProgress()
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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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}
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else {
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showInitialDownloadError(error)
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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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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 _ = userEnteredTitle {
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addFeedIfPossible()
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}
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if let url = URL(string: bestFeedSpecifier.urlString) {
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downloadTitleForFeed(url, { (title) in
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self.titleFromFeed = title
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self.addFeedIfPossible()
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})
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}
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else {
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// Shouldn't happen.
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showNoFeedsErrorMessage()
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}
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}
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}
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private extension AddFeedController {
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var urlStringFromPasteboard: String? {
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get {
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if let urlString = NSPasteboard.rs_urlString(from: NSPasteboard.general) {
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return urlString.rs_normalizedURL()
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}
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return nil
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}
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}
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func closeAddFeedSheet(_ returnCode: NSApplication.ModalResponse) {
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if let sheetWindow = addFeedWindowController?.window {
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hostWindow.endSheet(sheetWindow, returnCode: returnCode)
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}
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}
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func addFeedIfPossible() {
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// Add feed if not already subscribed-to.
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guard let folder = userEnteredFolder else {
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assertionFailure("Folder must not be nil here.")
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return
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}
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guard let account = userEnteredFolder?.account else {
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assertionFailure("Folder must have an account.")
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return
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}
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guard let feedURLString = foundFeedURLString else {
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assertionFailure("urlString must not be nil here.")
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return
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}
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if account.hasFeed(withURL: feedURLString) {
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showAlreadySubscribedError(feedURLString, folder)
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return
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}
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if let feed = folder.createFeedWithName(titleFromFeed, editedName: userEnteredTitle, urlString: feedURLString) {
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print(feedURLString)
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if folder.addItem(feed) {
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NotificationCenter.default.post(name: UserDidAddFeedNotification, object: self, userInfo: [UserDidAddFeedKey: feed])
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}
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}
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}
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// MARK: Find Feeds
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func findFeed() {
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guard let url = userEnteredURL else {
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assertionFailure("userEnteredURL must not be nil.")
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return
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}
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isFindingFeed = true
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feedFinder = FeedFinder(url: url, delegate: self)
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beginShowingProgress()
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}
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// MARK: Errors
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func showAlreadySubscribedError(_ urlString: String, _ folder: Folder) {
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let alert = NSAlert()
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alert.alertStyle = .informational
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alert.messageText = NSLocalizedString("Already subscribed", comment: "Feed finder")
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alert.informativeText = NSLocalizedString("Can’t add this feed because you’ve already subscribed to it.", comment: "Feed finder")
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alert.beginSheetModal(for: hostWindow)
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}
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func showInitialDownloadError(_ error: Error) {
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let alert = NSAlert()
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alert.alertStyle = .informational
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alert.messageText = 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 errorText = NSString.localizedStringWithFormat(formatString as NSString, error.localizedDescription)
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alert.informativeText = errorText as String
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alert.beginSheetModal(for: hostWindow)
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}
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func showNoFeedsErrorMessage() {
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let alert = NSAlert()
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alert.alertStyle = .informational
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alert.messageText = NSLocalizedString("Feed not found", comment: "Feed finder")
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alert.informativeText = NSLocalizedString("Can’t add a feed because no feed was found.", comment: "Feed finder")
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alert.beginSheetModal(for: hostWindow)
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}
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// MARK: Progress
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func beginShowingProgress() {
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runIndeterminateProgressWithMessage(NSLocalizedString("Finding feed…", comment:"Feed finder"))
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}
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func endShowingProgress() {
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stopIndeterminateProgress()
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hostWindow.makeKeyAndOrderFront(self)
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}
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}
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