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//
// NotificationProvider.swift
// MullvadVPN
//
// Created by pronebird on 09/12/2022.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import Foundation
import UserNotifications
/// Notification provider delegate primarily used by `NotificationManager`.
protocol NotificationProviderDelegate: AnyObject {
func notificationProviderDidInvalidate(_ notificationProvider: NotificationProvider)
func notificationProvider(_ notificationProvider: NotificationProvider, didReceiveAction actionIdentifier: String)
}
/// Base class for all notification providers.
class NotificationProvider: NotificationProviderProtocol, @unchecked Sendable {
weak var delegate: NotificationProviderDelegate?
/**
Provider identifier.
Override in subclasses and make sure each provider has unique identifier. It's preferred that identifiers use
reverse domain name, for instance: `com.example.app.ProviderName`.
*/
var identifier: NotificationProviderIdentifier {
.default
}
/**
Default implementation for the priority property, setting it to `.low`.
*/
var priority: NotificationPriority {
.low
}
/**
Send action to notification manager delegate.
Usually in response to user interacting with notification banner, i.e by tapping a button. Use different action
identifiers if notification offers more than one action that user can perform.
*/
func sendAction(_ actionIdentifier: String = UNNotificationDefaultActionIdentifier) {
dispatchOnMain {
self.delegate?.notificationProvider(self, didReceiveAction: actionIdentifier)
}
}
/**
This method tells notification manager to re-evalute the notification content.
Call this method when notification provider wants to change the content it presents.
*/
func invalidate() {
dispatchOnMain {
self.delegate?.notificationProviderDidInvalidate(self)
}
}
private func dispatchOnMain(_ block: @escaping @Sendable () -> Void) {
if Thread.isMainThread {
block()
} else {
DispatchQueue.main.async(execute: block)
}
}
}
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