FCM push Notifications

supabase/migrations/20260225120000_add_device_id_to_fcm_tokens.sql

@@ -0,0 +1,19 @@
+-- add device_id column to fcm_tokens and a unique constraint on (user_id, device_id)
+
+alter table if exists public.fcm_tokens
+  add column if not exists device_id text;
+
+-- create a unique index so upsert can update the row for the same device
+create unique index if not exists fcm_tokens_user_device_idx
+  on public.fcm_tokens(user_id, device_id);
+
+-- ensure device_id is protected by RLS policies: allow users to insert/update/delete their device rows
+-- (these policies assume RLS is already enabled on the table)
+create policy if not exists "Allow users insert their device tokens" on public.fcm_tokens
+  for insert with check (auth.uid() = user_id);
+
+create policy if not exists "Allow users delete their device tokens" on public.fcm_tokens
+  for delete using (auth.uid() = user_id);
+
+create policy if not exists "Allow users update their device tokens" on public.fcm_tokens
+  for update using (auth.uid() = user_id) with check (auth.uid() = user_id);