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/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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 federatingdb
import (
"context"
"encoding/json"
"errors"
"fmt"
"github.com/go-fed/activity/streams"
"github.com/go-fed/activity/streams/vocab"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// Create adds a new entry to the database which must be able to be
// keyed by its id.
//
// Note that Activity values received from federated peers may also be
// created in the database this way if the Federating Protocol is
// enabled. The client may freely decide to store only the id instead of
// the entire value.
//
// The library makes this call only after acquiring a lock first.
//
// Under certain conditions and network activities, Create may be called
// multiple times for the same ActivityStreams object.
func (f *federatingDB) Create(ctx context.Context, asType vocab.Type) error {
l := f.log.WithFields(
logrus.Fields{
"func": "Create",
"asType": asType.GetTypeName(),
},
)
m, err := streams.Serialize(asType)
if err != nil {
return err
}
b, err := json.Marshal(m)
if err != nil {
return err
}
l.Debugf("received CREATE asType %s", string(b))
targetAcctI := ctx.Value(util.APAccount)
if targetAcctI == nil {
// If the target account wasn't set on the context, that means this request didn't pass through the
// API, but came from inside GtS as the result of another activity on this instance. That being so,
// we can safely just ignore this activity, since we know we've already processed it elsewhere.
return nil
}
targetAcct, ok := targetAcctI.(*gtsmodel.Account)
if !ok {
l.Error("CREATE: target account was set on context but couldn't be parsed")
return nil
}
fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
if fromFederatorChanI == nil {
l.Error("CREATE: from federator channel wasn't set on context")
return nil
}
fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
if !ok {
l.Error("CREATE: from federator channel was set on context but couldn't be parsed")
return nil
}
switch asType.GetTypeName() {
case gtsmodel.ActivityStreamsCreate:
// CREATE SOMETHING
create, ok := asType.(vocab.ActivityStreamsCreate)
if !ok {
return errors.New("CREATE: could not convert type to create")
}
object := create.GetActivityStreamsObject()
for objectIter := object.Begin(); objectIter != object.End(); objectIter = objectIter.Next() {
switch objectIter.GetType().GetTypeName() {
case gtsmodel.ActivityStreamsNote:
// CREATE A NOTE
note := objectIter.GetActivityStreamsNote()
status, err := f.typeConverter.ASStatusToStatus(note)
if err != nil {
return fmt.Errorf("CREATE: error converting note to status: %s", err)
}
// id the status based on the time it was created
statusID, err := id.NewULIDFromTime(status.CreatedAt)
if err != nil {
return err
}
status.ID = statusID
if err := f.db.PutStatus(status); err != nil {
if err == db.ErrAlreadyExists {
// the status already exists in the database, which means we've already handled everything else,
// so we can just return nil here and be done with it.
return nil
}
// an actual error has happened
return fmt.Errorf("CREATE: database error inserting status: %s", err)
}
fromFederatorChan <- gtsmodel.FromFederator{
APObjectType: gtsmodel.ActivityStreamsNote,
APActivityType: gtsmodel.ActivityStreamsCreate,
GTSModel: status,
ReceivingAccount: targetAcct,
}
}
}
case gtsmodel.ActivityStreamsFollow:
// FOLLOW SOMETHING
follow, ok := asType.(vocab.ActivityStreamsFollow)
if !ok {
return errors.New("CREATE: could not convert type to follow")
}
followRequest, err := f.typeConverter.ASFollowToFollowRequest(follow)
if err != nil {
return fmt.Errorf("CREATE: could not convert Follow to follow request: %s", err)
}
newID, err := id.NewULID()
if err != nil {
return err
}
followRequest.ID = newID
if err := f.db.Put(followRequest); err != nil {
return fmt.Errorf("CREATE: database error inserting follow request: %s", err)
}
fromFederatorChan <- gtsmodel.FromFederator{
APObjectType: gtsmodel.ActivityStreamsFollow,
APActivityType: gtsmodel.ActivityStreamsCreate,
GTSModel: followRequest,
ReceivingAccount: targetAcct,
}
case gtsmodel.ActivityStreamsLike:
// LIKE SOMETHING
like, ok := asType.(vocab.ActivityStreamsLike)
if !ok {
return errors.New("CREATE: could not convert type to like")
}
fave, err := f.typeConverter.ASLikeToFave(like)
if err != nil {
return fmt.Errorf("CREATE: could not convert Like to fave: %s", err)
}
newID, err := id.NewULID()
if err != nil {
return err
}
fave.ID = newID
if err := f.db.Put(fave); err != nil {
return fmt.Errorf("CREATE: database error inserting fave: %s", err)
}
fromFederatorChan <- gtsmodel.FromFederator{
APObjectType: gtsmodel.ActivityStreamsLike,
APActivityType: gtsmodel.ActivityStreamsCreate,
GTSModel: fave,
ReceivingAccount: targetAcct,
}
case gtsmodel.ActivityStreamsBlock:
// BLOCK SOMETHING
blockable, ok := asType.(vocab.ActivityStreamsBlock)
if !ok {
return errors.New("CREATE: could not convert type to block")
}
block, err := f.typeConverter.ASBlockToBlock(blockable)
if err != nil {
return fmt.Errorf("CREATE: could not convert Block to gts model block")
}
newID, err := id.NewULID()
if err != nil {
return err
}
block.ID = newID
if err := f.db.Put(block); err != nil {
return fmt.Errorf("CREATE: database error inserting block: %s", err)
}
fromFederatorChan <- gtsmodel.FromFederator{
APObjectType: gtsmodel.ActivityStreamsBlock,
APActivityType: gtsmodel.ActivityStreamsCreate,
GTSModel: block,
ReceivingAccount: targetAcct,
}
}
return nil
}
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