NetNewsWire/Mac/MainWindow/AddFeed/AddFeedController.swift

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Swift
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//
// AddFeedController.swift
// NetNewsWire
//
// Created by Brent Simmons on 8/28/16.
// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
//
import AppKit
import RSCore
import RSCoreResources
import RSTree
import Articles
import Account
import RSParser
// Run add-feed sheet.
// If it returns with URL and optional name,
// run FeedFinder plus modal progress window.
// If FeedFinder returns feed,
// add feed.
// Else,
// display error sheet.
class AddFeedController: AddFeedWindowControllerDelegate {
private let hostWindow: NSWindow
private var addFeedWindowController: AddFeedWindowController?
private var foundFeedURLString: String?
private var titleFromFeed: String?
init(hostWindow: NSWindow) {
self.hostWindow = hostWindow
}
func showAddFeedSheet(_ type: AddFeedWindowControllerType, _ urlString: String? = nil, _ name: String? = nil, _ account: Account? = nil, _ folder: Folder? = nil) {
let folderTreeControllerDelegate = FolderTreeControllerDelegate()
let folderTreeController = TreeController(delegate: folderTreeControllerDelegate)
switch type {
case .webFeed:
addFeedWindowController = AddWebFeedWindowController(urlString: urlString ?? urlStringFromPasteboard,
name: name,
account: account,
folder: folder,
folderTreeController: folderTreeController,
delegate: self)
}
addFeedWindowController!.runSheetOnWindow(hostWindow)
}
// MARK: AddFeedWindowControllerDelegate
func addFeedWindowController(_: AddFeedWindowController, userEnteredURL url: URL, userEnteredTitle title: String?, container: Container) {
closeAddFeedSheet(NSApplication.ModalResponse.OK)
guard let accountAndFolderSpecifier = accountAndFolderFromContainer(container) else {
return
}
let account = accountAndFolderSpecifier.account
if account.hasWebFeed(withURL: url.absoluteString) {
showAlreadySubscribedError(url.absoluteString)
return
}
account.createWebFeed(url: url.absoluteString, name: title, container: container, validateFeed: true) { result in
DispatchQueue.main.async {
self.endShowingProgress()
}
switch result {
case .success(let feed):
NotificationCenter.default.post(name: .UserDidAddFeed, object: self, userInfo: [UserInfoKey.webFeed: feed])
case .failure(let error):
switch error {
case AccountError.createErrorAlreadySubscribed:
self.showAlreadySubscribedError(url.absoluteString)
case AccountError.createErrorNotFound:
self.showNoFeedsErrorMessage()
default:
DispatchQueue.main.async {
NSApplication.shared.presentError(error)
}
}
}
}
beginShowingProgress()
}
func addFeedWindowControllerUserDidCancel(_: AddFeedWindowController) {
closeAddFeedSheet(NSApplication.ModalResponse.cancel)
}
}
private extension AddFeedController {
var urlStringFromPasteboard: String? {
if let urlString = NSPasteboard.urlString(from: NSPasteboard.general) {
return urlString.normalizedURL
}
return nil
}
struct AccountAndFolderSpecifier {
let account: Account
let folder: Folder?
}
func accountAndFolderFromContainer(_ container: Container) -> AccountAndFolderSpecifier? {
if let account = container as? Account {
return AccountAndFolderSpecifier(account: account, folder: nil)
}
if let folder = container as? Folder, let account = folder.account {
return AccountAndFolderSpecifier(account: account, folder: folder)
}
return nil
}
func closeAddFeedSheet(_ returnCode: NSApplication.ModalResponse) {
if let sheetWindow = addFeedWindowController?.window {
hostWindow.endSheet(sheetWindow, returnCode: returnCode)
}
}
// MARK: Errors
func showAlreadySubscribedError(_ urlString: String) {
let alert = NSAlert()
alert.alertStyle = .informational
alert.messageText = NSLocalizedString("Already subscribed", comment: "Feed finder")
alert.informativeText = NSLocalizedString("Cant add this feed because youve already subscribed to it.", comment: "Feed finder")
alert.beginSheetModal(for: hostWindow)
}
func showInitialDownloadError(_ error: Error) {
let alert = NSAlert()
alert.alertStyle = .informational
alert.messageText = NSLocalizedString("Download Error", comment: "Feed finder")
let formatString = NSLocalizedString("Cant add this feed because of a download error: “%@”", comment: "Feed finder")
let errorText = NSString.localizedStringWithFormat(formatString as NSString, error.localizedDescription)
alert.informativeText = errorText as String
alert.beginSheetModal(for: hostWindow)
}
func showNoFeedsErrorMessage() {
let alert = NSAlert()
alert.alertStyle = .informational
alert.messageText = NSLocalizedString("Feed not found", comment: "Feed finder")
alert.informativeText = NSLocalizedString("Cant add a feed because no feed was found.", comment: "Feed finder")
alert.beginSheetModal(for: hostWindow)
}
// MARK: Progress
func beginShowingProgress() {
runIndeterminateProgressWithMessage(NSLocalizedString("Finding feed…", comment:"Feed finder"))
}
func endShowingProgress() {
stopIndeterminateProgress()
hostWindow.makeKeyAndOrderFront(self)
}
}