GoToSocial/internal/federation/federatingdb/accept.go

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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"
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"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/messages"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
func (f *federatingDB) Accept(ctx context.Context, accept vocab.ActivityStreamsAccept) error {
l := f.log.WithFields(
logrus.Fields{
"func": "Accept",
"asType": accept.GetTypeName(),
},
)
m, err := streams.Serialize(accept)
if err != nil {
return err
}
b, err := json.Marshal(m)
if err != nil {
return err
}
l.Debugf("received ACCEPT asType %s", string(b))
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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
}
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targetAcct, ok := targetAcctI.(*gtsmodel.Account)
if !ok {
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l.Error("ACCEPT: target account was set on context but couldn't be parsed")
return nil
}
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fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
if fromFederatorChanI == nil {
l.Error("ACCEPT: from federator channel wasn't set on context")
return nil
}
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fromFederatorChan, ok := fromFederatorChanI.(chan messages.FromFederator)
if !ok {
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l.Error("ACCEPT: from federator channel was set on context but couldn't be parsed")
return nil
}
acceptObject := accept.GetActivityStreamsObject()
if acceptObject == nil {
return errors.New("ACCEPT: no object set on vocab.ActivityStreamsAccept")
}
for iter := acceptObject.Begin(); iter != acceptObject.End(); iter = iter.Next() {
// check if the object is an IRI
if iter.IsIRI() {
// we have just the URI of whatever is being accepted, so we need to find out what it is
acceptedObjectIRI := iter.GetIRI()
if util.IsFollowPath(acceptedObjectIRI) {
// ACCEPT FOLLOW
gtsFollowRequest := &gtsmodel.FollowRequest{}
if err := f.db.GetWhere(ctx, []db.Where{{Key: "uri", Value: acceptedObjectIRI.String()}}, gtsFollowRequest); err != nil {
return fmt.Errorf("ACCEPT: couldn't get follow request with id %s from the database: %s", acceptedObjectIRI.String(), err)
}
// make sure the addressee of the original follow is the same as whatever inbox this landed in
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if gtsFollowRequest.AccountID != targetAcct.ID {
return errors.New("ACCEPT: follow object account and inbox account were not the same")
}
follow, err := f.db.AcceptFollowRequest(ctx, gtsFollowRequest.AccountID, gtsFollowRequest.TargetAccountID)
if err != nil {
return err
}
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fromFederatorChan <- messages.FromFederator{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityAccept,
GTSModel: follow,
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ReceivingAccount: targetAcct,
}
return nil
}
}
// check if iter is an AP object / type
if iter.GetType() == nil {
continue
}
switch iter.GetType().GetTypeName() {
// we have the whole object so we can figure out what we're accepting
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case ap.ActivityFollow:
// ACCEPT FOLLOW
asFollow, ok := iter.GetType().(vocab.ActivityStreamsFollow)
if !ok {
return errors.New("ACCEPT: couldn't parse follow into vocab.ActivityStreamsFollow")
}
// convert the follow to something we can understand
gtsFollow, err := f.typeConverter.ASFollowToFollow(ctx, asFollow)
if err != nil {
return fmt.Errorf("ACCEPT: error converting asfollow to gtsfollow: %s", err)
}
// make sure the addressee of the original follow is the same as whatever inbox this landed in
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if gtsFollow.AccountID != targetAcct.ID {
return errors.New("ACCEPT: follow object account and inbox account were not the same")
}
follow, err := f.db.AcceptFollowRequest(ctx, gtsFollow.AccountID, gtsFollow.TargetAccountID)
if err != nil {
return err
}
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fromFederatorChan <- messages.FromFederator{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityAccept,
GTSModel: follow,
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ReceivingAccount: targetAcct,
}
return nil
}
}
return nil
}