Store legacy fcm token to reduce unregister api calls

libsession/src/main/java/org/session/libsession/messaging/sending_receiving/notifications/PushNotificationAPI.kt

@@ -32,7 +32,7 @@ object PushNotificationAPI {
     fun register(token: String? = TextSecurePreferences.getFCMToken(context)) {
         Log.d(TAG, "register: $token")
 
-        token?.let(::unregisterV1)
+        unregisterV1IfRequired()
         subscribeGroups()
     }
 
@@ -40,11 +40,16 @@ object PushNotificationAPI {
     fun unregister(token: String) {
         Log.d(TAG, "unregister: $token")
 
-        unregisterV1(token)
+        unregisterV1IfRequired()
         unsubscribeGroups()
     }
 
-    private fun unregisterV1(token: String) {
+    /**
+     * Unregister push notifications for 1-1 conversations as this is now done in FirebasePushManager.
+     */
+    private fun unregisterV1IfRequired() {
+        val token = TextSecurePreferences.getLegacyFCMToken(context) ?: return
+
         val parameters = mapOf( "token" to token )
         val url = "$legacyServer/unregister"
         val body = RequestBody.create(MediaType.get("application/json"), JsonUtil.toJson(parameters))
@@ -53,7 +58,10 @@ object PushNotificationAPI {
             OnionRequestAPI.sendOnionRequest(request, legacyServer, legacyServerPublicKey, Version.V2).map { response ->
                 when (response.info["code"]) {
                     null, 0 -> Log.d(TAG, "Couldn't disable FCM with token: $token due to error: ${response.info["message"]}.")
-                    else -> Log.d(TAG, "unregisterV1 success token: $token")
+                    else -> {
+                        TextSecurePreferences.clearLegacyFCMToken(context)
+                        Log.d(TAG, "unregisterV1 success token: $token")
+                    }
                 }
             }.fail { exception ->
                 Log.d(TAG, "Couldn't disable FCM with token: $token due to error: ${exception}.")

libsession/src/main/java/org/session/libsession/utilities/TextSecurePreferences.kt

@@ -250,7 +250,8 @@ interface TextSecurePreferences {
         const val GIF_METADATA_WARNING = "has_seen_gif_metadata_warning"
         const val GIF_GRID_LAYOUT = "pref_gif_grid_layout"
         const val IS_USING_FCM = "pref_is_using_fcm"
-        const val FCM_TOKEN = "pref_fcm_token"
+        const val FCM_TOKEN_LEGACY = "pref_fcm_token"
+        const val FCM_TOKEN = "pref_fcm_token_2"
         const val LAST_FCM_TOKEN_UPLOAD_TIME = "pref_last_fcm_token_upload_time_2"
         const val LAST_CONFIGURATION_SYNC_TIME = "pref_last_configuration_sync_time"
         const val CONFIGURATION_SYNCED = "pref_configuration_synced"
@@ -312,6 +313,16 @@ interface TextSecurePreferences {
             setBooleanPreference(context, IS_USING_FCM, value)
         }
 
+        @JvmStatic
+        fun getLegacyFCMToken(context: Context): String? {
+            return getStringPreference(context, FCM_TOKEN_LEGACY, "")
+        }
+
+        @JvmStatic
+        fun clearLegacyFCMToken(context: Context) {
+            removePreference(context, FCM_TOKEN_LEGACY)
+        }
+
         @JvmStatic
         fun getFCMToken(context: Context): String? {
             return getStringPreference(context, FCM_TOKEN, "")