gitbay/Push/AppBadge.swift

 1import UserNotifications
 2
 3/// Sets the app icon badge to an unread count.
 4///
 5/// A push carries `aps.badge` and iOS applies it on arrival, so the badge
 6/// is right the moment a notification lands. It is not right afterwards:
 7/// nothing tells iOS the count dropped when the inbox is read in the app,
 8/// and the number sits there until the next push. These calls close that.
 9///
10/// The value is always the active account's unread count. The badge is
11/// per-device and unread is per-account, so with two accounts signed in
12/// the last writer wins — a push for one account, then a dashboard load
13/// on the other, disagree. Exact for a single account.
14///
15/// Failures are ignored. A badge that did not take is not worth telling
16/// anyone about, and the next writer corrects it.
17func setAppBadge(_ count: Int) async {
18    try? await UNUserNotificationCenter.current().setBadgeCount(max(0, count))
19}