gotosocial/internal/message/fromfederatorprocess.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 message
import (
"errors"
"fmt"
"net/url"
"github.com/google/uuid"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/transport"
)
func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) error {
l := p.log.WithFields(logrus.Fields{
"func": "processFromFederator",
"federatorMsg": fmt.Sprintf("%+v", federatorMsg),
})
l.Debug("entering function PROCESS FROM FEDERATOR")
switch federatorMsg.APObjectType {
case gtsmodel.ActivityStreamsNote:
incomingStatus, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
if !ok {
return errors.New("note was not parseable as *gtsmodel.Status")
}
l.Debug("will now derefence incoming status")
if err := p.dereferenceStatusFields(incomingStatus); err != nil {
return fmt.Errorf("error dereferencing status from federator: %s", err)
}
if err := p.db.UpdateByID(incomingStatus.ID, incomingStatus); err != nil {
return fmt.Errorf("error updating dereferenced status in the db: %s", err)
}
if err := p.notifyStatus(incomingStatus); err != nil {
return err
}
}
return nil
}
// dereferenceStatusFields fetches all the information we temporarily pinned to an incoming
// federated status, back in the federating db's Create function.
//
// When a status comes in from the federation API, there are certain fields that
// haven't been dereferenced yet, because we needed to provide a snappy synchronous
// response to the caller. By the time it reaches this function though, it's being
// processed asynchronously, so we have all the time in the world to fetch the various
// bits and bobs that are attached to the status, and properly flesh it out, before we
// send the status to any timelines and notify people.
//
// Things to dereference and fetch here:
//
// 1. Media attachments.
// 2. Hashtags.
// 3. Emojis.
// 4. Mentions.
// 5. Posting account.
// 6. Replied-to-status.
//
// SIDE EFFECTS:
// This function will deference all of the above, insert them in the database as necessary,
// and attach them to the status. The status itself will not be added to the database yet,
// that's up the caller to do.
func (p *processor) dereferenceStatusFields(status *gtsmodel.Status) error {
l := p.log.WithFields(logrus.Fields{
"func": "dereferenceStatusFields",
"status": fmt.Sprintf("%+v", status),
})
l.Debug("entering function")
var t transport.Transport
var err error
var username string
// TODO: dereference with a user that's addressed by the status
t, err = p.federator.GetTransportForUser(username)
if err != nil {
return fmt.Errorf("error creating transport: %s", err)
}
// the status should have an ID by now, but just in case it doesn't let's generate one here
// because we'll need it further down
if status.ID == "" {
status.ID = uuid.NewString()
}
// 1. Media attachments.
//
// At this point we should know:
// * the media type of the file we're looking for (a.File.ContentType)
// * the blurhash (a.Blurhash)
// * the file type (a.Type)
// * the remote URL (a.RemoteURL)
// This should be enough to pass along to the media processor.
attachmentIDs := []string{}
for _, a := range status.GTSMediaAttachments {
l.Debugf("dereferencing attachment: %+v", a)
// it might have been processed elsewhere so check first if it's already in the database or not
maybeAttachment := &gtsmodel.MediaAttachment{}
err := p.db.GetWhere("remote_url", a.RemoteURL, maybeAttachment)
if err == nil {
// we already have it in the db, dereferenced, no need to do it again
l.Debugf("attachment already exists with id %s", maybeAttachment.ID)
attachmentIDs = append(attachmentIDs, maybeAttachment.ID)
continue
}
if _, ok := err.(db.ErrNoEntries); !ok {
// we have a real error
return fmt.Errorf("error checking db for existence of attachment with remote url %s: %s", a.RemoteURL, err)
}
// it just doesn't exist yet so carry on
l.Debug("attachment doesn't exist yet, calling ProcessRemoteAttachment", a)
deferencedAttachment, err := p.mediaHandler.ProcessRemoteAttachment(t, a, status.AccountID)
if err != nil {
p.log.Errorf("error dereferencing status attachment: %s", err)
continue
}
l.Debugf("dereferenced attachment: %+v", deferencedAttachment)
deferencedAttachment.StatusID = status.ID
if err := p.db.Put(deferencedAttachment); err != nil {
return fmt.Errorf("error inserting dereferenced attachment with remote url %s: %s", a.RemoteURL, err)
}
deferencedAttachment.Description = a.Description
attachmentIDs = append(attachmentIDs, deferencedAttachment.ID)
}
status.Attachments = attachmentIDs
// 2. Hashtags
// 3. Emojis
// 4. Mentions
// At this point, mentions should have the namestring and mentionedAccountURI set on them.
//
// We should dereference any accounts mentioned here which we don't have in our db yet, by their URI.
mentions := []string{}
for _, m := range status.GTSMentions {
uri, err := url.Parse(m.MentionedAccountURI)
if err != nil {
l.Debugf("error parsing mentioned account uri %s: %s", m.MentionedAccountURI, err)
continue
}
m.StatusID = status.ID
m.OriginAccountID = status.GTSAccount.ID
m.OriginAccountURI = status.GTSAccount.URI
targetAccount := &gtsmodel.Account{}
if err := p.db.GetWhere("uri", uri.String(), targetAccount); err != nil {
// proper error
if _, ok := err.(db.ErrNoEntries); !ok {
return fmt.Errorf("db error checking for account with uri %s", uri.String())
}
// we just don't have it yet, so we should go get it....
accountable, err := p.federator.DereferenceRemoteAccount(username, uri)
if err != nil {
// we can't dereference it so just skip it
l.Debugf("error dereferencing remote account with uri %s: %s", uri.String(), err)
continue
}
targetAccount, err = p.tc.ASRepresentationToAccount(accountable)
if err != nil {
l.Debugf("error converting remote account with uri %s into gts model: %s", uri.String(), err)
continue
}
if err := p.db.Put(targetAccount); err != nil {
return fmt.Errorf("db error inserting account with uri %s", uri.String())
}
}
// by this point, we know the targetAccount exists in our database with an ID :)
m.TargetAccountID = targetAccount.ID
if err := p.db.Put(m); err != nil {
return fmt.Errorf("error creating mention: %s", err)
}
mentions = append(mentions, m.ID)
}
status.Mentions = mentions
return nil
}