gotosocial/internal/processing/fromfederator.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 processing
import (
"errors"
"fmt"
"net/url"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
)
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.APActivityType {
case gtsmodel.ActivityStreamsCreate:
// CREATE
switch federatorMsg.APObjectType {
case gtsmodel.ActivityStreamsNote:
// CREATE A STATUS
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, federatorMsg.ReceivingAccount.Username); 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.timelineStatus(incomingStatus); err != nil {
return err
}
if err := p.notifyStatus(incomingStatus); err != nil {
return err
}
case gtsmodel.ActivityStreamsProfile:
// CREATE AN ACCOUNT
incomingAccount, ok := federatorMsg.GTSModel.(*gtsmodel.Account)
if !ok {
return errors.New("profile was not parseable as *gtsmodel.Account")
}
l.Debug("will now derefence incoming account")
if err := p.dereferenceAccountFields(incomingAccount, "", false); err != nil {
return fmt.Errorf("error dereferencing account from federator: %s", err)
}
if err := p.db.UpdateByID(incomingAccount.ID, incomingAccount); err != nil {
return fmt.Errorf("error updating dereferenced account in the db: %s", err)
}
case gtsmodel.ActivityStreamsLike:
// CREATE A FAVE
incomingFave, ok := federatorMsg.GTSModel.(*gtsmodel.StatusFave)
if !ok {
return errors.New("like was not parseable as *gtsmodel.StatusFave")
}
if err := p.notifyFave(incomingFave, federatorMsg.ReceivingAccount); err != nil {
return err
}
case gtsmodel.ActivityStreamsFollow:
// CREATE A FOLLOW REQUEST
incomingFollowRequest, ok := federatorMsg.GTSModel.(*gtsmodel.FollowRequest)
if !ok {
return errors.New("incomingFollowRequest was not parseable as *gtsmodel.FollowRequest")
}
if err := p.notifyFollowRequest(incomingFollowRequest, federatorMsg.ReceivingAccount); err != nil {
return err
}
case gtsmodel.ActivityStreamsAnnounce:
// CREATE AN ANNOUNCE
incomingAnnounce, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
if !ok {
return errors.New("announce was not parseable as *gtsmodel.Status")
}
if err := p.dereferenceAnnounce(incomingAnnounce, federatorMsg.ReceivingAccount.Username); err != nil {
return fmt.Errorf("error dereferencing announce from federator: %s", err)
}
incomingAnnounceID, err := id.NewULIDFromTime(incomingAnnounce.CreatedAt)
if err != nil {
return err
}
incomingAnnounce.ID = incomingAnnounceID
if err := p.db.Put(incomingAnnounce); err != nil {
if _, ok := err.(db.ErrAlreadyExists); !ok {
return fmt.Errorf("error adding dereferenced announce to the db: %s", err)
}
}
if err := p.notifyAnnounce(incomingAnnounce); err != nil {
return err
}
}
case gtsmodel.ActivityStreamsUpdate:
// UPDATE
switch federatorMsg.APObjectType {
case gtsmodel.ActivityStreamsProfile:
// UPDATE AN ACCOUNT
incomingAccount, ok := federatorMsg.GTSModel.(*gtsmodel.Account)
if !ok {
return errors.New("profile was not parseable as *gtsmodel.Account")
}
l.Debug("will now derefence incoming account")
if err := p.dereferenceAccountFields(incomingAccount, federatorMsg.ReceivingAccount.Username, true); err != nil {
return fmt.Errorf("error dereferencing account from federator: %s", err)
}
if err := p.db.UpdateByID(incomingAccount.ID, incomingAccount); err != nil {
return fmt.Errorf("error updating dereferenced account in the db: %s", err)
}
}
case gtsmodel.ActivityStreamsDelete:
// DELETE
switch federatorMsg.APObjectType {
case gtsmodel.ActivityStreamsNote:
// DELETE A STATUS
// TODO: handle side effects of status deletion here:
// 1. delete all media associated with status
// 2. delete boosts of status
// 3. etc etc etc
statusToDelete, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
if !ok {
return errors.New("note was not parseable as *gtsmodel.Status")
}
return p.deleteStatusFromTimelines(statusToDelete)
case gtsmodel.ActivityStreamsProfile:
// DELETE A PROFILE/ACCOUNT
// TODO: handle side effects of account deletion here: delete all objects, statuses, media etc associated with account
}
case gtsmodel.ActivityStreamsAccept:
// ACCEPT
switch federatorMsg.APObjectType {
case gtsmodel.ActivityStreamsFollow:
// ACCEPT A FOLLOW
follow, ok := federatorMsg.GTSModel.(*gtsmodel.Follow)
if !ok {
return errors.New("follow was not parseable as *gtsmodel.Follow")
}
if err := p.notifyFollow(follow, federatorMsg.ReceivingAccount); 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, requestingUsername string) error {
l := p.log.WithFields(logrus.Fields{
"func": "dereferenceStatusFields",
"status": fmt.Sprintf("%+v", status),
})
l.Debug("entering function")
t, err := p.federator.GetTransportForUser(requestingUsername)
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 == "" {
newID, err := id.NewULIDFromTime(status.CreatedAt)
if err != nil {
return err
}
status.ID = newID
}
// 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([]db.Where{{Key: "remote_url", Value: 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
deferencedAttachment.Description = a.Description
if err := p.db.Put(deferencedAttachment); err != nil {
return fmt.Errorf("error inserting dereferenced attachment with remote url %s: %s", a.RemoteURL, err)
}
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 {
if m.ID == "" {
mID, err := id.NewRandomULID()
if err != nil {
return err
}
m.ID = mID
}
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.GTSAuthorAccount.ID
m.OriginAccountURI = status.GTSAuthorAccount.URI
targetAccount := &gtsmodel.Account{}
if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: 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(requestingUsername, 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, false)
if err != nil {
l.Debugf("error converting remote account with uri %s into gts model: %s", uri.String(), err)
continue
}
targetAccountID, err := id.NewRandomULID()
if err != nil {
return err
}
targetAccount.ID = targetAccountID
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
}
func (p *processor) dereferenceAccountFields(account *gtsmodel.Account, requestingUsername string, refresh bool) error {
l := p.log.WithFields(logrus.Fields{
"func": "dereferenceAccountFields",
"requestingUsername": requestingUsername,
})
t, err := p.federator.GetTransportForUser(requestingUsername)
if err != nil {
return fmt.Errorf("error getting transport for user: %s", err)
}
// fetch the header and avatar
if err := p.fetchHeaderAndAviForAccount(account, t, refresh); err != nil {
// if this doesn't work, just skip it -- we can do it later
l.Debugf("error fetching header/avi for account: %s", err)
}
if err := p.db.UpdateByID(account.ID, account); err != nil {
return fmt.Errorf("error updating account in database: %s", err)
}
return nil
}
func (p *processor) dereferenceAnnounce(announce *gtsmodel.Status, requestingUsername string) error {
if announce.GTSBoostedStatus == nil || announce.GTSBoostedStatus.URI == "" {
// we can't do anything unfortunately
return errors.New("dereferenceAnnounce: no URI to dereference")
}
// check if we already have the boosted status in the database
boostedStatus := &gtsmodel.Status{}
err := p.db.GetWhere([]db.Where{{Key: "uri", Value: announce.GTSBoostedStatus.URI}}, boostedStatus)
if err == nil {
// nice, we already have it so we don't actually need to dereference it from remote
announce.Content = boostedStatus.Content
announce.ContentWarning = boostedStatus.ContentWarning
announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
announce.Sensitive = boostedStatus.Sensitive
announce.Language = boostedStatus.Language
announce.Text = boostedStatus.Text
announce.BoostOfID = boostedStatus.ID
announce.Visibility = boostedStatus.Visibility
announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
announce.GTSBoostedStatus = boostedStatus
return nil
}
// we don't have it so we need to dereference it
remoteStatusURI, err := url.Parse(announce.GTSBoostedStatus.URI)
if err != nil {
return fmt.Errorf("dereferenceAnnounce: error parsing url %s: %s", announce.GTSBoostedStatus.URI, err)
}
statusable, err := p.federator.DereferenceRemoteStatus(requestingUsername, remoteStatusURI)
if err != nil {
return fmt.Errorf("dereferenceAnnounce: error dereferencing remote status with id %s: %s", announce.GTSBoostedStatus.URI, err)
}
// make sure we have the author account in the db
attributedToProp := statusable.GetActivityStreamsAttributedTo()
for iter := attributedToProp.Begin(); iter != attributedToProp.End(); iter = iter.Next() {
accountURI := iter.GetIRI()
if accountURI == nil {
continue
}
if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: accountURI.String()}}, &gtsmodel.Account{}); err == nil {
// we already have it, fine
continue
}
// we don't have the boosted status author account yet so dereference it
accountable, err := p.federator.DereferenceRemoteAccount(requestingUsername, accountURI)
if err != nil {
return fmt.Errorf("dereferenceAnnounce: error dereferencing remote account with id %s: %s", accountURI.String(), err)
}
account, err := p.tc.ASRepresentationToAccount(accountable, false)
if err != nil {
return fmt.Errorf("dereferenceAnnounce: error converting dereferenced account with id %s into account : %s", accountURI.String(), err)
}
accountID, err := id.NewRandomULID()
if err != nil {
return err
}
account.ID = accountID
if err := p.db.Put(account); err != nil {
return fmt.Errorf("dereferenceAnnounce: error putting dereferenced account with id %s into database : %s", accountURI.String(), err)
}
if err := p.dereferenceAccountFields(account, requestingUsername, false); err != nil {
return fmt.Errorf("dereferenceAnnounce: error dereferencing fields on account with id %s : %s", accountURI.String(), err)
}
}
// now convert the statusable into something we can understand
boostedStatus, err = p.tc.ASStatusToStatus(statusable)
if err != nil {
return fmt.Errorf("dereferenceAnnounce: error converting dereferenced statusable with id %s into status : %s", announce.GTSBoostedStatus.URI, err)
}
boostedStatusID, err := id.NewULIDFromTime(boostedStatus.CreatedAt)
if err != nil {
return nil
}
boostedStatus.ID = boostedStatusID
if err := p.db.Put(boostedStatus); err != nil {
return fmt.Errorf("dereferenceAnnounce: error putting dereferenced status with id %s into the db: %s", announce.GTSBoostedStatus.URI, err)
}
// now dereference additional fields straight away (we're already async here so we have time)
if err := p.dereferenceStatusFields(boostedStatus, requestingUsername); err != nil {
return fmt.Errorf("dereferenceAnnounce: error dereferencing status fields for status with id %s: %s", announce.GTSBoostedStatus.URI, err)
}
// update with the newly dereferenced fields
if err := p.db.UpdateByID(boostedStatus.ID, boostedStatus); err != nil {
return fmt.Errorf("dereferenceAnnounce: error updating dereferenced status in the db: %s", err)
}
// we have everything we need!
announce.Content = boostedStatus.Content
announce.ContentWarning = boostedStatus.ContentWarning
announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
announce.Sensitive = boostedStatus.Sensitive
announce.Language = boostedStatus.Language
announce.Text = boostedStatus.Text
announce.BoostOfID = boostedStatus.ID
announce.Visibility = boostedStatus.Visibility
announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
announce.GTSBoostedStatus = boostedStatus
return nil
}