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Fix race condition on loading notifications

This commit is contained in:
Shadowfacts 2020-05-06 19:32:32 -04:00
parent aa625a41f5
commit ebbfc7a132
Signed by untrusted user: shadowfacts
GPG Key ID: 94A5AB95422746E5
2 changed files with 38 additions and 26 deletions
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15
Tusker/CoreData/MastodonCachePersistentStore.swift
View File

@ -118,5 +118,20 @@ class MastodonCachePersistentStore: NSPersistentContainer {
accounts.forEach { self.accountSubject.send($0.id) } accounts.forEach { self.accountSubject.send($0.id) }
} }
} }
func addAll(notifications: [Pachyderm.Notification], completion: (() -> Void)? = nil) {
backgroundContext.perform {
let statuses = notifications.compactMap { $0.status }
let accounts = notifications.map { $0.account }
statuses.forEach { self.upsert(status: $0, incrementReferenceCount: true) }
accounts.forEach { self.upsert(account: $0) }
if self.backgroundContext.hasChanges {
try! self.backgroundContext.save()
}
completion?()
statuses.forEach { self.statusSubject.send($0.id) }
accounts.forEach { self.accountSubject.send($0.id) }
}
}
} }

49
Tusker/Screens/Notifications/NotificationsTableViewController.swift
View File

@ -63,14 +63,13 @@ class NotificationsTableViewController: EnhancedTableViewController {
self.groups.append(contentsOf: groups) self.groups.append(contentsOf: groups)
self.mastodonController.persistentContainer.addAll(statuses: notifications.compactMap { $0.status })
self.mastodonController.persistentContainer.addAll(accounts: notifications.map { $0.account })
self.newer = pagination?.newer self.newer = pagination?.newer
self.older = pagination?.older self.older = pagination?.older
DispatchQueue.main.async { self.mastodonController.persistentContainer.addAll(notifications: notifications) {
self.tableView.reloadData() DispatchQueue.main.async {
self.tableView.reloadData()
}
} }
} }
} }
@ -141,15 +140,14 @@ class NotificationsTableViewController: EnhancedTableViewController {
IndexPath(row: $0, section: 0) IndexPath(row: $0, section: 0)
} }
self.groups.append(contentsOf: groups) self.groups.append(contentsOf: groups)
self.mastodonController.persistentContainer.addAll(statuses: newNotifications.compactMap { $0.status })
self.mastodonController.persistentContainer.addAll(accounts: newNotifications.map { $0.account })
self.older = pagination?.older self.older = pagination?.older
DispatchQueue.main.async { self.mastodonController.persistentContainer.addAll(notifications: newNotifications) {
UIView.performWithoutAnimation { DispatchQueue.main.async {
self.tableView.insertRows(at: newIndexPaths, with: .automatic) UIView.performWithoutAnimation {
self.tableView.insertRows(at: newIndexPaths, with: .automatic)
}
} }
} }
} }
@ -219,25 +217,24 @@ class NotificationsTableViewController: EnhancedTableViewController {
self.groups.insert(contentsOf: groups, at: 0) self.groups.insert(contentsOf: groups, at: 0)
self.mastodonController.persistentContainer.addAll(statuses: newNotifications.compactMap { $0.status })
self.mastodonController.persistentContainer.addAll(accounts: newNotifications.map { $0.account })
if let newer = pagination?.newer { if let newer = pagination?.newer {
self.newer = newer self.newer = newer
} }
DispatchQueue.main.async { self.mastodonController.persistentContainer.addAll(notifications: newNotifications) {
let newIndexPaths = (0..<groups.count).map { DispatchQueue.main.async {
IndexPath(row: $0, section: 0) let newIndexPaths = (0..<groups.count).map {
IndexPath(row: $0, section: 0)
}
UIView.performWithoutAnimation {
self.tableView.insertRows(at: newIndexPaths, with: .automatic)
}
self.refreshControl?.endRefreshing()
// maintain the current position in the list (don't scroll to top)
self.tableView.scrollToRow(at: IndexPath(row: newNotifications.count, section: 0), at: .top, animated: false)
} }
UIView.performWithoutAnimation {
self.tableView.insertRows(at: newIndexPaths, with: .automatic)
}
self.refreshControl?.endRefreshing()
// maintain the current position in the list (don't scroll to top)
self.tableView.scrollToRow(at: IndexPath(row: newNotifications.count, section: 0), at: .top, animated: false)
} }
} }
} }