CREATE OR REPLACE FUNCTION notify_users() RETURNS TRIGGER AS $$
    DECLARE
        record RECORD;
        id UUID;
        payload JSON;
    BEGIN
    IF (TG_OP = 'DELETE') THEN
        id = OLD.id;
    ELSE
        id = NEW.id;
    END IF;

    payload = json_build_object(
        'table', TG_TABLE_NAME,
        'action', TG_OP,
        'id', id
    );

    PERFORM pg_notify('users.events', payload::text);

    RETURN NULL;
    END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION notify_listings() RETURNS TRIGGER AS $$
    DECLARE
        record RECORD;
        id int8;
        payload JSON;
    BEGIN
    IF (TG_OP = 'DELETE') THEN
        id = OLD.id;
    ELSE
        id = NEW.id;
    END IF;

    payload = json_build_object(
        'table', TG_TABLE_NAME,
        'action', TG_OP,
        'id', id
    );

    PERFORM pg_notify('listings.events', payload::text);

    RETURN NULL;
    END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION notify_offers() RETURNS TRIGGER AS $$
    DECLARE
        record RECORD;
        id UUID;
        payload JSON;
    BEGIN
    IF (TG_OP = 'DELETE') THEN
        id = OLD.id;
    ELSE
        id = NEW.id;
    END IF;

    payload = json_build_object(
        'table', TG_TABLE_NAME,
        'action', TG_OP,
        'id', id
    );

    PERFORM pg_notify('offers.events', payload::text);

    RETURN NULL;
    END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION notify_wants() RETURNS TRIGGER AS $$
    DECLARE
        record RECORD;
        id UUID;
        payload JSON;
    BEGIN
    IF (TG_OP = 'DELETE') THEN
        id = OLD.id;
    ELSE
        id = NEW.id;
    END IF;

    payload = json_build_object(
        'table', TG_TABLE_NAME,
        'action', TG_OP,
        'id', id
    );

    PERFORM pg_notify('wants.events', payload::text);

    RETURN NULL;
    END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE TRIGGER notify_wants_event
AFTER INSERT OR UPDATE OR DELETE ON wants
    FOR EACH ROW EXECUTE PROCEDURE notify_wants();

CREATE OR REPLACE TRIGGER notify_listings_event
AFTER INSERT OR UPDATE OR DELETE ON listings
    FOR EACH ROW EXECUTE PROCEDURE notify_listings();

CREATE OR REPLACE TRIGGER notify_offers_event
AFTER INSERT OR UPDATE OR DELETE ON offers
    FOR EACH ROW EXECUTE PROCEDURE notify_offers();

CREATE OR REPLACE TRIGGER notify_users_event
AFTER INSERT OR UPDATE OR DELETE ON users
    FOR EACH ROW EXECUTE PROCEDURE notify_users();