[mastodon] Dismiss old notifications in the migration script, so they aren't reposted by ticketfrei3

backend/src/kibicara/migratefromticketfrei.py

@@ -5,6 +5,7 @@ from os import urandom
 from tortoise import Tortoise
 from tortoise.exceptions import DoesNotExist
 import asyncio
+from mastodon import Mastodon
 
 from kibicara.model import Admin, Hood, IncludePattern, ExcludePattern
 from kibicara.platforms.mastodon.model import MastodonInstance, MastodonAccount
@@ -148,6 +149,7 @@ class Main:
                     access_token=access_token,
                     enabled=mastodon_enabled,
                 )
+                await dismiss_notifications(hood)
                 print(f"Mastodon: {instance_url}, {access_token}")
 
             telegram_account = self.old_db.execute(
@@ -206,3 +208,18 @@ class Main:
                 )
                 print(f"Twitter: last ID: {seen_tweet}")
         await Tortoise.close_connections()
+
+
+async def dismiss_notifications(hood):
+    model = await MastodonAccount.get(hood=hood)
+    await model.fetch_related("instance")
+    account = Mastodon(
+        client_id=model.instance.client_id,
+        client_secret=model.instance.client_secret,
+        api_base_url=model.instance.name,
+        access_token=model.access_token,
+    )
+    notifications = account.notifications()
+    for status in notifications:
+        account.notifications_dismiss(status["id"])
+    print(f"Dismissed {len(notifications)} notifications on Mastodon.")