[feature] Hashtag federation (in/out), hashtag client API endpoints (#2032)

* update go-fed

* do the things

* remove unused columns from tags

* update to latest lingo from main

* further tag shenanigans

* serve stub page at tag endpoint

* we did it lads

* tests, oh tests, ohhh tests, oh tests (doo doo doo doo)

* swagger docs

* document hashtag usage + federation

* instanceGet

* don't bother parsing tag href

* rename whereStartsWith -> whereStartsLike

* remove GetOrCreateTag

* dont cache status tag timelineability

1 files changed, 39 insertions, 0 deletions

diff --git a/internal/db/tag.go b/internal/db/tag.go
new file mode 100644
index 000000000..c0642f5a4
--- /dev/null
+++ b/internal/db/tag.go
@@ -0,0 +1,39 @@
+// 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 db
+
+import (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// Tag contains functions for getting/creating tags in the database.
+type Tag interface {
+	// GetTag gets a single tag by ID
+	GetTag(ctx context.Context, id string) (*gtsmodel.Tag, error)
+
+	// GetTagByName gets a single tag using the given name.
+	GetTagByName(ctx context.Context, name string) (*gtsmodel.Tag, error)
+
+	// PutTag inserts the given tag in the database.
+	PutTag(ctx context.Context, tag *gtsmodel.Tag) error
+
+	// GetTags gets multiple tags.
+	GetTags(ctx context.Context, ids []string) ([]*gtsmodel.Tag, error)
+}