[feature] Status thread mute/unmute functionality (#2278)

* add db models + functions for keeping track of threads

* give em the old linty testy

* create, remove, check mutes

* swagger

* testerino

* test mute/unmute via api

* add info log about new index creation

* thread + allow muting of any remote statuses that mention a local account

* IsStatusThreadMutedBy -> IsThreadMutedByAccount

* use common processing functions in status processor

* set = NULL

* favee!

* get rekt darlings, darlings get rekt

* testrig please, have mercy muy liege

internal/db/bundb/migrations/20231016113235_mute_status_thread.go

@@ -0,0 +1,148 @@
+// 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 migrations
+
+import (
+	"context"
+	"strings"
+
+	gtsmodel "github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+	"github.com/uptrace/bun"
+	"github.com/uptrace/bun/dialect"
+)
+
+func init() {
+	up := func(ctx context.Context, db *bun.DB) error {
+		return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
+			// Create thread table.
+			if _, err := tx.
+				NewCreateTable().
+				Model(&gtsmodel.Thread{}).
+				IfNotExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			// Create thread intermediate table.
+			if _, err := tx.
+				NewCreateTable().
+				Model(&gtsmodel.ThreadToStatus{}).
+				IfNotExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			// Drop old pkey constraint from
+			// deprecated status mute table.
+			//
+			// This is only necessary with postgres.
+			if tx.Dialect().Name() == dialect.PG {
+				if _, err := tx.ExecContext(
+					ctx,
+					"ALTER TABLE ? DROP CONSTRAINT IF EXISTS ?",
+					bun.Ident("status_mutes"),
+					bun.Safe("status_mutes_pkey"),
+				); err != nil {
+					return err
+				}
+			}
+
+			// Drop old index.
+			if _, err := tx.
+				NewDropIndex().
+				Index("status_mutes_account_id_target_account_id_status_id_idx").
+				IfExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			// Drop deprecated status mute table.
+			if _, err := tx.
+				NewDropTable().
+				Table("status_mutes").
+				IfExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			// Create new thread mute table.
+			if _, err := tx.
+				NewCreateTable().
+				Model(&gtsmodel.ThreadMute{}).
+				IfNotExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			log.Info(ctx, "creating a new index on the statuses table, please wait and don't interrupt it (this may take a few minutes)")
+
+			// Update statuses to add thread ID column.
+			_, err := tx.ExecContext(
+				ctx,
+				"ALTER TABLE ? ADD COLUMN ? CHAR(26)",
+				bun.Ident("statuses"),
+				bun.Ident("thread_id"),
+			)
+			if err != nil && !(strings.Contains(err.Error(), "already exists") ||
+				strings.Contains(err.Error(), "duplicate column name") ||
+				strings.Contains(err.Error(), "SQLSTATE 42701")) {
+				return err
+			}
+
+			// Index new + existing tables properly.
+			for table, indexes := range map[string]map[string][]string{
+				"threads": {
+					"threads_id_idx": {"id"},
+				},
+				"thread_mutes": {
+					"thread_mutes_id_idx": {"id"},
+					// Eg., check if target thread is muted by account.
+					"thread_mutes_thread_id_account_id_idx": {"thread_id", "account_id"},
+				},
+				"statuses": {
+					// Eg., select all statuses in a thread.
+					"statuses_thread_id_idx": {"thread_id"},
+				},
+			} {
+				for index, columns := range indexes {
+					if _, err := tx.
+						NewCreateIndex().
+						Table(table).
+						Index(index).
+						Column(columns...).
+						Exec(ctx); err != nil {
+						return err
+					}
+				}
+			}
+
+			return nil
+		})
+	}
+
+	down := func(ctx context.Context, db *bun.DB) error {
+		return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
+			return nil
+		})
+	}
+
+	if err := Migrations.Register(up, down); err != nil {
+		panic(err)
+	}
+}