Tusker/ShareExtension/ShareViewController.swift

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Swift
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2023-04-19 01:55:14 +00:00
//
// ShareViewController.swift
// ShareExtension
//
// Created by Shadowfacts on 4/17/23.
// Copyright © 2023 Shadowfacts. All rights reserved.
//
import SwiftUI
import UserAccounts
import ComposeUI
import UniformTypeIdentifiers
import TuskerPreferences
class ShareViewController: UIViewController {
private var state: State = .loading
required init?(coder: NSCoder) {
super.init(coder: coder)
}
override func viewDidLoad() {
super.viewDidLoad()
view.tintColor = Preferences.shared.accentColor.color
if let account = UserAccountsManager.shared.getMostRecentAccount() {
Task { @MainActor in
let draft = await createDraft(account: account)
state = .ok
let context = ShareMastodonContext(accountInfo: account)
let host = ShareHostingController(draft: draft, mastodonContext: context)
let nav = UINavigationController(rootViewController: host)
self.addChild(nav)
nav.view.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(nav.view)
NSLayoutConstraint.activate([
nav.view.leadingAnchor.constraint(equalTo: self.view.leadingAnchor),
nav.view.trailingAnchor.constraint(equalTo: self.view.trailingAnchor),
nav.view.topAnchor.constraint(equalTo: self.view.topAnchor),
nav.view.bottomAnchor.constraint(equalTo: self.view.bottomAnchor),
])
nav.didMove(toParent: self)
}
} else {
state = .notLoggedIn
}
}
private func createDraft(account: UserAccountInfo) async -> Draft {
let (text, attachments) = await getDraftConfigurationFromExtensionContext()
let draft = Draft(
accountID: account.id,
text: text,
contentWarning: "",
inReplyToID: nil,
visibility: Preferences.shared.defaultPostVisibility,
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localOnly: false
)
draft.attachments = attachments
DraftsManager.shared.add(draft)
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return draft
}
private func getDraftConfigurationFromExtensionContext() async -> (String, [DraftAttachment]) {
guard let extensionContext,
let inputItem = (extensionContext.inputItems as? [NSExtensionItem])?.first,
let itemProvider = inputItem.attachments?.first else {
return ("", [])
}
if let url: NSURL = await getObject(from: itemProvider) {
if let title = inputItem.attributedTitle ?? inputItem.attributedContentText {
return ("\n\n\(title.string)\n\(url.absoluteString ?? "")", [])
} else {
return ("\n\n\(url.absoluteString ?? "")", [])
}
} else if let text: NSString = await getObject(from: itemProvider) {
return ("\n\n\(text)", [])
} else if let attachment: DraftAttachment = await getObject(from: itemProvider) {
return ("", [attachment])
} else if let attributedContent = inputItem.attributedContentText {
return ("\n\n\(attributedContent.string)", [])
} else {
return ("", [])
}
}
private func getObject<T: NSItemProviderReading>(from itemProvider: NSItemProvider) async -> T? {
guard itemProvider.canLoadObject(ofClass: T.self) else {
return nil
}
return await withCheckedContinuation({ continuation in
itemProvider.loadObject(ofClass: T.self) { object, error in
continuation.resume(returning: object as? T)
}
})
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if case .notLoggedIn = state {
let alert = UIAlertController(title: "Not Logged In", message: "You need to log in to an account through the app before you can post.", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [unowned self] _ in
self.extensionContext!.cancelRequest(withError: Error.notLoggedIn)
}))
present(alert, animated: true)
}
}
enum State {
case loading
case notLoggedIn
case ok
}
enum Error: Swift.Error {
case notLoggedIn
}
}