-- Matches the _op_type values from elasticsearch bulk API
-- https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html

CREATE TYPE torrents_action AS ENUM ('index', 'delete');

CREATE TABLE IF NOT EXISTS reindex_torrents (
	reindex_torrents_id SERIAL,
	torrent_id int,
	action torrents_action
);

CREATE OR REPLACE FUNCTION add_reindex_torrents_action() RETURNS TRIGGER AS $$
    BEGIN
        IF (TG_OP = 'INSERT') THEN
            INSERT INTO reindex_torrents (torrent_id, action) VALUES (NEW.torrent_id, 'index');
            RETURN NEW;
        ELSIF (TG_OP = 'UPDATE') THEN
          IF (NEW.deleted_at IS NOT NULL) THEN
            INSERT INTO reindex_torrents (torrent_id, action) VALUES (OLD.torrent_id, 'delete');
            RETURN NEW;
          ELSE
            INSERT INTO reindex_torrents (torrent_id, action) VALUES (NEW.torrent_id, 'index');
            RETURN NEW;
          END IF;
        ELSIF (TG_OP = 'DELETE') THEN
            INSERT INTO reindex_torrents (torrent_id, action) VALUES (OLD.torrent_id, 'delete');
            RETURN OLD;
        END IF;
        RETURN NULL; -- result is ignored since this is an AFTER trigger
    END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trigger_reindex_torrents ON {{ nyaapantsu_torrent_tablename }};
CREATE TRIGGER trigger_reindex_torrents
AFTER INSERT OR UPDATE OR DELETE ON {{ nyaapantsu_torrent_tablename }}
    FOR EACH ROW EXECUTE PROCEDURE add_reindex_torrents_action();

-- vim: ft=sql