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Fix potential crash when deleting list

This commit is contained in:
Shadowfacts 2022-11-11 18:16:44 -05:00
parent b465838b71
commit 60bf3b2e33
3 changed files with 78 additions and 21 deletions
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4
Tusker.xcodeproj/project.pbxproj
View File

@ -314,6 +314,7 @@
D6F6A54E291EF7E100F496A8 /* EditListSearchFollowingViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6F6A54D291EF7E100F496A8 /* EditListSearchFollowingViewController.swift */; };
D6F6A550291F058600F496A8 /* CreateListService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6F6A54F291F058600F496A8 /* CreateListService.swift */; };
D6F6A552291F098700F496A8 /* RenameListService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6F6A551291F098700F496A8 /* RenameListService.swift */; };
D6F6A554291F0D9600F496A8 /* DeleteListService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6F6A553291F0D9600F496A8 /* DeleteListService.swift */; };
D6F953F021251A2900CF0F2B /* MastodonController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6F953EF21251A2900CF0F2B /* MastodonController.swift */; };
D6FF9860255C717400845181 /* AccountSwitchingContainerViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6FF985F255C717400845181 /* AccountSwitchingContainerViewController.swift */; };
/* End PBXBuildFile section */
@ -683,6 +684,7 @@
D6F6A54D291EF7E100F496A8 /* EditListSearchFollowingViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EditListSearchFollowingViewController.swift; sourceTree = "<group>"; };
D6F6A54F291F058600F496A8 /* CreateListService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CreateListService.swift; sourceTree = "<group>"; };
D6F6A551291F098700F496A8 /* RenameListService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RenameListService.swift; sourceTree = "<group>"; };
D6F6A553291F0D9600F496A8 /* DeleteListService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DeleteListService.swift; sourceTree = "<group>"; };
D6F953EF21251A2900CF0F2B /* MastodonController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MastodonController.swift; sourceTree = "<group>"; };
D6FF985F255C717400845181 /* AccountSwitchingContainerViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AccountSwitchingContainerViewController.swift; sourceTree = "<group>"; };
/* End PBXFileReference section */
@ -1494,6 +1496,7 @@
D621733228F1D5ED004C7DB1 /* ReblogService.swift */,
D6F6A54F291F058600F496A8 /* CreateListService.swift */,
D6F6A551291F098700F496A8 /* RenameListService.swift */,
D6F6A553291F0D9600F496A8 /* DeleteListService.swift */,
);
path = API;
sourceTree = "<group>";
@ -1994,6 +1997,7 @@
D6C1B2082545D1EC00DAAA66 /* StatusCardView.swift in Sources */,
D64BC18A23C16487000D0238 /* UnpinStatusActivity.swift in Sources */,
D64D8CA92463B494006B0BAA /* MultiThreadDictionary.swift in Sources */,
D6F6A554291F0D9600F496A8 /* DeleteListService.swift in Sources */,
D68E6F5F253C9B2D001A1B4C /* BaseEmojiLabel.swift in Sources */,
D6F0B12B24A3071C001E48C3 /* MainSplitViewController.swift in Sources */,
D6AEBB3E2321638100E5038B /* UIActivity+Types.swift in Sources */,

65
Tusker/API/DeleteListService.swift Normal file
View File

@ -0,0 +1,65 @@
//
// DeleteListService.swift
// Tusker
//
// Created by Shadowfacts on 11/11/22.
// Copyright © 2022 Shadowfacts. All rights reserved.
//
import UIKit
import Pachyderm
@MainActor
class DeleteListService {
private let list: List
private let mastodonController: MastodonController
private let present: (UIViewController) -> Void
init(list: List, mastodonController: MastodonController, present: @escaping (UIViewController) -> Void) {
self.list = list
self.mastodonController = mastodonController
self.present = present
}
@discardableResult
func run() async -> Bool {
if await presentConfirmationAlert() {
await deleteList()
return true
} else {
return false
}
}
private func presentConfirmationAlert() async -> Bool {
await withCheckedContinuation { continuation in
let titleFormat = NSLocalizedString("Are you sure you want to delete the '%@' list?", comment: "delete list alert title")
let title = String(format: titleFormat, list.title)
let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "delete list alert cancel button"), style: .cancel, handler: { (_) in
continuation.resume(returning: false)
}))
alert.addAction(UIAlertAction(title: NSLocalizedString("Delete List", comment: "delete list alert confirm button"), style: .destructive, handler: { (_) in
continuation.resume(returning: true)
}))
present(alert)
}
}
private func deleteList() async {
do {
let request = List.delete(list)
_ = try await mastodonController.run(request)
NotificationCenter.default.post(name: .listsChanged, object: nil)
} catch {
let alert = UIAlertController(title: "Error Deleting List", message: error.localizedDescription, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel))
alert.addAction(UIAlertAction(title: "Retry", style: .default, handler: { _ in
Task {
await self.deleteList()
}
}))
present(alert)
}
}
}

30
Tusker/Screens/Explore/ExploreViewController.swift
View File

@ -274,29 +274,17 @@ class ExploreViewController: UIViewController, UICollectionViewDelegate {
}
private func deleteList(_ list: List, completion: @escaping (Bool) -> Void) {
let titleFormat = NSLocalizedString("Are you sure you want to delete the '%@' list?", comment: "delete list alert title")
let title = String(format: titleFormat, list.title)
let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "delete list alert cancel button"), style: .cancel, handler: { (_) in
completion(false)
}))
alert.addAction(UIAlertAction(title: NSLocalizedString("Delete List", comment: "delete list alert confirm button"), style: .destructive, handler: { (_) in
let request = List.delete(list)
self.mastodonController.run(request) { (response) in
guard case .success(_, _) = response else {
fatalError()
}
var snapshot = self.dataSource.snapshot()
Task { @MainActor in
let service = DeleteListService(list: list, mastodonController: mastodonController, present: { self.present($0, animated: true) })
if await service.run() {
var snapshot = dataSource.snapshot()
snapshot.deleteItems([.list(list)])
DispatchQueue.main.async {
self.dataSource.apply(snapshot)
completion(true)
}
await dataSource.apply(snapshot)
completion(true)
} else {
completion(false)
}
}))
present(alert, animated: true)
}
}
func removeSavedHashtag(_ hashtag: Hashtag) {