Add match notification digests

apps/supabase/migrations/20260117000005_add_match_notification_digests.sql

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+-- Add match notification digest system
+-- Coalesces multiple match events into a single push notification.
+--
+-- Design goals:
+-- - Reduce push spam when many matches occur quickly
+-- - Keep delivery latency bounded (<= ~2 minutes)
+-- - Keep match creation real-time; only push notifications are delayed
+
+-- Create pending match notifications table
+CREATE TABLE pending_match_notifications (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    couple_id UUID NOT NULL REFERENCES couples(id) ON DELETE CASCADE,
+    match_count INTEGER NOT NULL DEFAULT 1,
+    latest_match_id UUID REFERENCES matches(id) ON DELETE SET NULL,
+    notify_at TIMESTAMPTZ NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT now(),
+    updated_at TIMESTAMPTZ DEFAULT now(),
+    UNIQUE(couple_id) -- One pending notification per couple (UPSERT timer reset)
+);
+
+-- Index for efficient cron queries
+CREATE INDEX idx_pending_match_notifications_notify_at
+    ON pending_match_notifications(notify_at);
+
+-- Enable RLS
+ALTER TABLE pending_match_notifications ENABLE ROW LEVEL SECURITY;
+
+-- RLS policies
+CREATE POLICY "Users can view their couple's pending match notifications"
+    ON pending_match_notifications FOR SELECT
+    USING (couple_id = get_auth_user_couple_id());
+
+CREATE POLICY "Super admins can view all pending match notifications"
+    ON pending_match_notifications FOR SELECT
+    USING (is_super_admin());
+
+-- Updated_at trigger
+CREATE TRIGGER update_pending_match_notifications_updated_at
+    BEFORE UPDATE ON pending_match_notifications
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at();
+
+-- Function to queue match notifications
+-- Runs whenever a new match row is inserted.
+-- The notify_at value is aligned to minute boundaries so that a once-per-minute cron
+-- can deliver notifications within ~1-2 minutes.
+CREATE OR REPLACE FUNCTION queue_match_notification()
+RETURNS TRIGGER
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = 'public'
+AS $$
+BEGIN
+    INSERT INTO pending_match_notifications (
+        couple_id,
+        match_count,
+        latest_match_id,
+        notify_at
+    )
+    VALUES (
+        NEW.couple_id,
+        1,
+        NEW.id,
+        date_trunc('minute', now()) + interval '2 minutes'
+    )
+    ON CONFLICT (couple_id) DO UPDATE SET
+        match_count = pending_match_notifications.match_count + 1,
+        latest_match_id = NEW.id,
+        notify_at = date_trunc('minute', now()) + interval '2 minutes',
+        updated_at = now();
+
+    RETURN NEW;
+END;
+$$;
+
+-- Trigger on matches table
+CREATE TRIGGER on_match_created
+    AFTER INSERT ON matches
+    FOR EACH ROW
+    EXECUTE FUNCTION queue_match_notification();
+
+-- Schedule cron job (runs every minute)
+SELECT cron.schedule(
+    'send-match-notification-digests',
+    '* * * * *',
+    $$
+    SELECT net.http_post(
+        url := 'https://ckjcrkjpmhqhiucifukx.supabase.co/functions/v1/send-match-notification-digest',
+        headers := jsonb_build_object('Content-Type', 'application/json'),
+        body := '{}'::jsonb
+    )
+    $$
+);