Implement database trigger for reviews

supabase/migrations/20251016145459_dfa14e84-4d4a-4fe7-b1b3-f59be8e08159.sql

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+-- Function to automatically add ride credit when user reviews a ride
+CREATE OR REPLACE FUNCTION auto_add_ride_credit_on_review()
+RETURNS TRIGGER
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+BEGIN
+  -- Only proceed if this is a ride review (not a park review)
+  IF NEW.ride_id IS NOT NULL THEN
+    -- Check if user already has this ride credit
+    IF NOT EXISTS (
+      SELECT 1 FROM public.user_ride_credits
+      WHERE user_id = NEW.user_id AND ride_id = NEW.ride_id
+    ) THEN
+      -- Insert ride credit using visit_date from review if available
+      INSERT INTO public.user_ride_credits (
+        user_id,
+        ride_id,
+        first_ride_date,
+        ride_count
+      ) VALUES (
+        NEW.user_id,
+        NEW.ride_id,
+        NEW.visit_date,
+        1
+      );
+      
+      RAISE NOTICE 'Auto-added ride credit for user % on ride %', NEW.user_id, NEW.ride_id;
+    END IF;
+  END IF;
+  
+  RETURN NEW;
+END;
+$$;
+
+-- Trigger on review insert
+CREATE TRIGGER auto_add_ride_credit_after_review
+  AFTER INSERT ON public.reviews
+  FOR EACH ROW
+  EXECUTE FUNCTION auto_add_ride_credit_on_review();
+
+-- Add helpful comment
+COMMENT ON FUNCTION auto_add_ride_credit_on_review() IS 
+  'Automatically adds a ride credit when a user reviews a ride they haven''t tracked yet. Uses visit_date from review as first_ride_date.';