1 files changed, 44 insertions, 0 deletions
diff --git a/src/db/rest/like/api_like_update.sql b/src/db/rest/like/api_like_update.sql
new file mode 100644
index 0000000..76db73a
--- /dev/null
+++ b/src/db/rest/like/api_like_update.sql
@@ -0,0 +1,44 @@
+CREATE FUNCTION _api.like_update()
+RETURNS TRIGGER
+LANGUAGE plpgsql VOLATILE
+AS $BODY$
+DECLARE
+	_user_id INTEGER;
+	_changed BOOLEAN;
+BEGIN
+	_user_id = _api.get_user_id();
+	_changed = FALSE;
+
+	IF OLD.user_id <> _user_id THEN
+		PERFORM _api.raise_deny();
+	END IF;
+
+	NEW.value = COALESCE(NEW.value, OLD.value);
+
+	IF NEW.value IS DISTINCT FROM OLD.value THEN
+		_changed = TRUE;
+	END IF;
+
+	IF _changed THEN
+		UPDATE admin.like SET
+			value = NEW.value,
+			modified = clock_timestamp()
+			WHERE id = OLD.id;
+	END IF;
+
+	RETURN NEW;
+END
+$BODY$;
+
+GRANT EXECUTE ON FUNCTION _api.like_update()
+	TO rest_user;
+GRANT UPDATE ON TABLE api.like
+	TO rest_user;
+GRANT UPDATE ON TABLE admin.like
+	TO rest_user;
+
+CREATE TRIGGER api_like_update_trgr
+	INSTEAD OF UPDATE
+			ON api.like
+			FOR EACH ROW
+				EXECUTE PROCEDURE _api.like_update();