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Helper/LocalNotificationHelper/LocalNotificationManager.swift

@@ -0,0 +1,89 @@
+//
+//  LocalNotificationManager.swift
+//  Local_Notification
+//
+//  Created by JungpyoHong on 6/21/21.
+//
+
+import Foundation
+import UserNotifications
+import UIKit
+
+struct LocalNotification {
+    var id: String
+    var title: String
+    var body: String
+}
+
+enum LocalNotificationDurationType {
+    case days
+    case hours
+    case minutes
+    case seconds
+}
+
+struct LocalNotificationManager {
+    
+    static private var notifications = [LocalNotification]()
+    
+    static private func requestPermission() -> Void {
+        UNUserNotificationCenter
+            .current()
+            .requestAuthorization(options: [.alert, .badge, .alert]) { granted, error in
+                if granted == true && error == nil {
+                    // Permission accept
+                }
+        }
+    }
+    
+    static private func addNotification(title: String, body: String) -> Void {
+        notifications.append(LocalNotification(id: UUID().uuidString, title: title, body: body))
+    }
+    
+    static private func scheduleNotifications(_ durationInSeconds: Int, repeats: Bool, userInfo: [AnyHashable : Any]) {
+        UIApplication.shared.applicationIconBadgeNumber = 0
+        for notification in notifications {
+            let content = UNMutableNotificationContent()
+            content.title = notification.title
+            content.body = notification.body
+            content.sound = UNNotificationSound.default
+            content.badge = NSNumber(value: UIApplication.shared.applicationIconBadgeNumber + 1)
+            content.userInfo = userInfo
+            
+            let trigger = UNTimeIntervalNotificationTrigger(timeInterval: TimeInterval(durationInSeconds), repeats: repeats)
+            let request = UNNotificationRequest(identifier: notification.id, content: content, trigger: trigger)
+            
+            UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
+            UNUserNotificationCenter.current().add(request) { error in
+                guard error == nil else { return }
+                print("Scheduling notification with id: \(notification.id)")
+            }
+        }
+        notifications.removeAll()
+    }
+    
+    static private func scheduleNotifications(_ duration: Int, of type: LocalNotificationDurationType, repeats: Bool, userInfo: [AnyHashable : Any]) {
+        var seconds = 0
+        switch type {
+        case .seconds:
+            seconds = duration
+        case .minutes:
+            seconds = duration * 60
+        case .hours:
+            seconds = duration * 60 * 60
+        case .days:
+            seconds = duration * 60 * 60 * 24
+        }
+        scheduleNotifications(seconds, repeats: repeats, userInfo: userInfo)
+    }
+    
+    static func cancel() {
+        UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
+    }
+    
+    static func setNotification(_ duration: Int, of type: LocalNotificationDurationType, repeats: Bool, title: String, body: String, userInfo: [AnyHashable : Any]) {
+        requestPermission()
+        addNotification(title: title, body: body)
+        scheduleNotifications(duration, of: type, repeats: repeats, userInfo: userInfo)
+    }
+}