feat(ios): add threadIdentifier and summaryArgument to LocalNotificat…

…ion (#2396)

* add localnotification threadIdentifier and summaryArgument properties for iOS

* change new options text

Co-authored-by: Patrick Gingras <775.pg.12@gmail.com>

core/src/core-plugin-definitions.ts

@@ -1032,6 +1032,14 @@ export interface LocalNotification {
   attachments?: LocalNotificationAttachment[];
   actionTypeId?: string;
   extra?: any;
+  /**
+   * iOS only: set the thread identifier for notification grouping
+   */
+  threadIdentifier?: string;
+  /**
+   * iOS 12+ only: set the summary argument for notification grouping
+   */
+  summaryArgument?: string;
 }
 
 export interface LocalNotificationSchedule {

ios/Capacitor/Capacitor/Plugins/LocalNotifications.swift

@@ -165,6 +165,8 @@ public class CAPLocalNotificationsPlugin : CAPPlugin {
     let sound = notification["sound"] as? String
     let attachments = notification["attachments"] as? JSArray
     let extra = notification["extra"] as? JSObject ?? [:]
+    let threadIdentifier = notification["threadIdentifier"] as? String
+    let summaryArgument = notification["summaryArgument"] as? String
 
     let content = UNMutableNotificationContent()
     content.title = NSString.localizedUserNotificationString(forKey: title, arguments: nil)
@@ -175,6 +177,14 @@ public class CAPLocalNotificationsPlugin : CAPPlugin {
     if actionTypeId != nil {
       content.categoryIdentifier = actionTypeId!
     }
+
+    if let threadIdentifier = threadIdentifier {
+      content.threadIdentifier = threadIdentifier
+    }
+
+    if let summaryArgument = summaryArgument, #available(iOS 12, *) {
+      content.summaryArgument = summaryArgument
+    }
 
     if sound != nil {
       content.sound = UNNotificationSound(named: UNNotificationSoundName(sound!))