[performance] add statusfilter cache to cache calculated status filtering results (#4303)

this adds another 'filter' type cache, similar to the visibility and mute caches, to cache the results of status filtering checks. for the moment this keeps all the check calls themselves within the frontend typeconversion code, but i may move this out of the typeconverter in a future PR (also removing the ErrHideStatus means of propagating a hidden status).

also tweaks some of the cache invalidation hooks to not make unnecessary calls.

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4303
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/internal/filter/status/filter.go b/internal/filter/status/filter.go
new file mode 100644
index 000000000..d9ec12934
--- /dev/null
+++ b/internal/filter/status/filter.go
@@ -0,0 +1,33 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package status
+
+import (
+	"code.superseriousbusiness.org/gotosocial/internal/state"
+)
+
+// noauth is a placeholder ID used in cache lookups
+// when there is no authorized account ID to use.
+const noauth = "noauth"
+
+// Filter packages up logic for checking whether
+// given status is muted by a given requester (user).
+type Filter struct{ state *state.State }
+
+// New returns a new Filter interface that will use the provided state.
+func NewFilter(state *state.State) *Filter { return &Filter{state} }