[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

1 files changed, 146 insertions, 0 deletions

diff --git a/internal/processing/status/mute.go b/internal/processing/status/mute.go
new file mode 100644
index 000000000..1663ee0bc
--- /dev/null
+++ b/internal/processing/status/mute.go
@@ -0,0 +1,146 @@
+// 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 (
+	"context"
+	"errors"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+)
+
+// getMuteableStatus fetches targetStatusID status and
+// ensures that requestingAccount can mute or unmute it.
+//
+// It checks:
+//   - Status exists and is visible to requester.
+//   - Status belongs to or mentions requesting account.
+//   - Status is not a boost.
+//   - Status has a thread ID.
+func (p *Processor) getMuteableStatus(
+	ctx context.Context,
+	requestingAccount *gtsmodel.Account,
+	targetStatusID string,
+) (*gtsmodel.Status, gtserror.WithCode) {
+	targetStatus, errWithCode := p.c.GetVisibleTargetStatus(ctx, requestingAccount, targetStatusID)
+	if errWithCode != nil {
+		return nil, errWithCode
+	}
+
+	if !targetStatus.BelongsToAccount(requestingAccount.ID) &&
+		!targetStatus.MentionsAccount(requestingAccount.ID) {
+		err := gtserror.Newf("status %s does not belong to or mention account %s", targetStatusID, requestingAccount.ID)
+		return nil, gtserror.NewErrorNotFound(err)
+	}
+
+	if targetStatus.BoostOfID != "" {
+		err := gtserror.New("cannot mute or unmute boosts")
+		return nil, gtserror.NewErrorBadRequest(err, err.Error())
+	}
+
+	if targetStatus.ThreadID == "" {
+		err := gtserror.New("cannot mute or unmute status with no threadID")
+		return nil, gtserror.NewErrorBadRequest(err, err.Error())
+	}
+
+	return targetStatus, nil
+}
+
+func (p *Processor) MuteCreate(
+	ctx context.Context,
+	requestingAccount *gtsmodel.Account,
+	targetStatusID string,
+) (*apimodel.Status, gtserror.WithCode) {
+	targetStatus, errWithCode := p.getMuteableStatus(ctx, requestingAccount, targetStatusID)
+	if errWithCode != nil {
+		return nil, errWithCode
+	}
+
+	var (
+		threadID  = targetStatus.ThreadID
+		accountID = requestingAccount.ID
+	)
+
+	// Check if mute already exists for this thread ID.
+	threadMute, err := p.state.DB.GetThreadMutedByAccount(ctx, threadID, accountID)
+	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		// Real db error.
+		err := gtserror.Newf("db error fetching mute of thread %s for account %s", threadID, accountID)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	if threadMute != nil {
+		// Thread mute already exists.
+		// Our job here is done ("but you didn't do anything!").
+		return p.c.GetAPIStatus(ctx, requestingAccount, targetStatus)
+	}
+
+	// Gotta create a mute.
+	if err := p.state.DB.PutThreadMute(ctx, &gtsmodel.ThreadMute{
+		ID:        id.NewULID(),
+		ThreadID:  threadID,
+		AccountID: accountID,
+	}); err != nil {
+		err := gtserror.Newf("db error putting mute of thread %s for account %s", threadID, accountID)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	return p.c.GetAPIStatus(ctx, requestingAccount, targetStatus)
+}
+
+func (p *Processor) MuteRemove(
+	ctx context.Context,
+	requestingAccount *gtsmodel.Account,
+	targetStatusID string,
+) (*apimodel.Status, gtserror.WithCode) {
+	targetStatus, errWithCode := p.getMuteableStatus(ctx, requestingAccount, targetStatusID)
+	if errWithCode != nil {
+		return nil, errWithCode
+	}
+
+	var (
+		threadID  = targetStatus.ThreadID
+		accountID = requestingAccount.ID
+	)
+
+	// Check if mute exists for this thread ID.
+	threadMute, err := p.state.DB.GetThreadMutedByAccount(ctx, threadID, accountID)
+	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		// Real db error.
+		err := gtserror.Newf("db error fetching mute of thread %s for account %s", threadID, accountID)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	if threadMute == nil {
+		// Thread mute doesn't exist.
+		// Our job here is done ("but you didn't do anything!").
+		return p.c.GetAPIStatus(ctx, requestingAccount, targetStatus)
+	}
+
+	// Gotta remove the mute.
+	if err := p.state.DB.DeleteThreadMute(ctx, threadMute.ID); err != nil {
+		err := gtserror.Newf("db error deleting mute of thread %s for account %s", threadID, accountID)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	return p.c.GetAPIStatus(ctx, requestingAccount, targetStatus)
+}