-- Migration: 082_proxy_notification_trigger
-- Date: 2024-12-11
-- Description: Add PostgreSQL NOTIFY trigger to alert workers when proxies are added

-- Create function to notify workers when active proxy is added/activated
CREATE OR REPLACE FUNCTION notify_proxy_added()
RETURNS TRIGGER AS $$
BEGIN
  -- Only notify if proxy is active
  IF NEW.active = true THEN
    PERFORM pg_notify('proxy_added', NEW.id::text);
  END IF;
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- Drop existing trigger if any
DROP TRIGGER IF EXISTS proxy_added_trigger ON proxies;

-- Create trigger on insert and update of active column
CREATE TRIGGER proxy_added_trigger
AFTER INSERT OR UPDATE OF active ON proxies
FOR EACH ROW
EXECUTE FUNCTION notify_proxy_added();

COMMENT ON FUNCTION notify_proxy_added() IS
'Sends PostgreSQL NOTIFY to proxy_added channel when an active proxy is added or activated. Workers LISTEN on this channel to wake up immediately.';