feature: filters v2 server-side warning/hiding (#2793)

* Remove dead code

* Filter statuses when converting to frontend representation

* status.filtered is an array

* Make matching case-insensitive

* Remove TODOs that don't need to be done now

* Add missing filter check for notification

* lint: rename ErrHideStatus

* APIFilterActionToFilterAction not used yet

* swaggerino docseroni

* Address review comments

* Add apimodel.FilterActionNone

---------

Co-authored-by: tobi <31960611+tsmethurst@users.noreply.github.com>
Co-authored-by: tobi <tobi.smethurst@protonmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/internal/filter/status/status.go b/internal/filter/status/status.go
new file mode 100644
index 000000000..7cf0a7a1e
--- /dev/null
+++ b/internal/filter/status/status.go
@@ -0,0 +1,45 @@
+// 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 represents status filters managed by the user through the API.
+package status
+
+import (
+	"errors"
+)
+
+// ErrHideStatus indicates that a status has been filtered and should not be returned at all.
+var ErrHideStatus = errors.New("hide status")
+
+// FilterContext determines the filters that apply to a given status or list of statuses.
+type FilterContext string
+
+const (
+	// FilterContextNone means no filters should be applied.
+	// There are no filters with this context; it's for internal use only.
+	FilterContextNone FilterContext = ""
+	// FilterContextHome means this status is being filtered as part of a home or list timeline.
+	FilterContextHome FilterContext = "home"
+	// FilterContextNotifications means this status is being filtered as part of the notifications timeline.
+	FilterContextNotifications FilterContext = "notifications"
+	// FilterContextPublic means this status is being filtered as part of a public or tag timeline.
+	FilterContextPublic FilterContext = "public"
+	// FilterContextThread means this status is being filtered as part of a thread's context.
+	FilterContextThread FilterContext = "thread"
+	// FilterContextAccount means this status is being filtered as part of an account's statuses.
+	FilterContextAccount FilterContext = "account"
+)