[feature] Implement filters_changed stream event (#2972)

internal/processing/stream/filterschanged.go

@@ -0,0 +1,36 @@
+// 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 stream
+
+import (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/stream"
+)
+
+// FiltersChanged streams a filters changed event to any open, appropriate streams belonging to the given account.
+// Filter changes have no payload.
+func (p *Processor) FiltersChanged(ctx context.Context, account *gtsmodel.Account) {
+	p.streams.Post(ctx, account.ID, stream.Message{
+		Event: stream.EventTypeFiltersChanged,
+		Stream: []string{
+			stream.TimelineHome,
+		},
+	})
+}