gotosocial/internal/processing/fromfederator.go

443 lines
14 KiB
Go

// 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 processing
import (
"context"
"errors"
"fmt"
"net/url"
"codeberg.org/gruf/go-kv"
"codeberg.org/gruf/go-logger/v2/level"
"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/messages"
)
// ProcessFromFederator reads the APActivityType and APObjectType of an incoming message from the federator,
// and directs the message into the appropriate side effect handler function, or simply does nothing if there's
// no handler function defined for the combination of Activity and Object.
func (p *Processor) ProcessFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
// Allocate new log fields slice
fields := make([]kv.Field, 3, 5)
fields[0] = kv.Field{"activityType", federatorMsg.APActivityType}
fields[1] = kv.Field{"objectType", federatorMsg.APObjectType}
fields[2] = kv.Field{"toAccount", federatorMsg.ReceivingAccount.Username}
if federatorMsg.APIri != nil {
// An IRI was supplied, append to log
fields = append(fields, kv.Field{
"iri", federatorMsg.APIri,
})
}
if federatorMsg.GTSModel != nil &&
log.Level() >= level.DEBUG {
// Append converted model to log
fields = append(fields, kv.Field{
"model", federatorMsg.GTSModel,
})
}
// Log this federated message
l := log.WithContext(ctx).WithFields(fields...)
l.Info("processing from federator")
switch federatorMsg.APActivityType {
case ap.ActivityCreate:
// CREATE SOMETHING
switch federatorMsg.APObjectType {
case ap.ObjectNote:
// CREATE A STATUS
return p.processCreateStatusFromFederator(ctx, federatorMsg)
case ap.ActivityLike:
// CREATE A FAVE
return p.processCreateFaveFromFederator(ctx, federatorMsg)
case ap.ActivityFollow:
// CREATE A FOLLOW REQUEST
return p.processCreateFollowRequestFromFederator(ctx, federatorMsg)
case ap.ActivityAnnounce:
// CREATE AN ANNOUNCE
return p.processCreateAnnounceFromFederator(ctx, federatorMsg)
case ap.ActivityBlock:
// CREATE A BLOCK
return p.processCreateBlockFromFederator(ctx, federatorMsg)
case ap.ActivityFlag:
// CREATE A FLAG / REPORT
return p.processCreateFlagFromFederator(ctx, federatorMsg)
}
case ap.ActivityUpdate:
// UPDATE SOMETHING
if federatorMsg.APObjectType == ap.ObjectProfile {
// UPDATE AN ACCOUNT
return p.processUpdateAccountFromFederator(ctx, federatorMsg)
}
case ap.ActivityDelete:
// DELETE SOMETHING
switch federatorMsg.APObjectType {
case ap.ObjectNote:
// DELETE A STATUS
return p.processDeleteStatusFromFederator(ctx, federatorMsg)
case ap.ObjectProfile:
// DELETE A PROFILE/ACCOUNT
return p.processDeleteAccountFromFederator(ctx, federatorMsg)
}
}
// not a combination we can/need to process
return nil
}
// processCreateStatusFromFederator handles Activity Create and Object Note.
func (p *Processor) processCreateStatusFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
// Check the federatorMsg for either an already
// dereferenced and converted status pinned to
// the message, or an AP IRI that we need to deref.
var (
status *gtsmodel.Status
err error
)
if federatorMsg.GTSModel != nil {
// Model is set, use that.
status, err = p.statusFromGTSModel(ctx, federatorMsg)
} else {
// Model is not set, use IRI.
status, err = p.statusFromAPIRI(ctx, federatorMsg)
}
if err != nil {
return gtserror.Newf("error extracting status from federatorMsg: %w", err)
}
if status.Account == nil || status.Account.IsRemote() {
// Either no account attached yet, or a remote account.
// Both situations we need to parse account URI to fetch it.
accountURI, err := url.Parse(status.AccountURI)
if err != nil {
return err
}
// Ensure that account for this status has been deref'd.
status.Account, _, err = p.federator.GetAccountByURI(ctx,
federatorMsg.ReceivingAccount.Username,
accountURI,
)
if err != nil {
return err
}
}
// Ensure status ancestors dereferenced. We need at least the
// immediate parent (if present) to ascertain timelineability.
if err := p.federator.DereferenceStatusAncestors(ctx,
federatorMsg.ReceivingAccount.Username,
status,
); err != nil {
return err
}
if status.InReplyToID != "" {
// Interaction counts changed on the replied status;
// uncache the prepared version from all timelines.
p.invalidateStatusFromTimelines(ctx, status.InReplyToID)
}
if err := p.timelineAndNotifyStatus(ctx, status); err != nil {
return gtserror.Newf("error timelining status: %w", err)
}
return nil
}
func (p *Processor) statusFromGTSModel(ctx context.Context, federatorMsg messages.FromFederator) (*gtsmodel.Status, error) {
// There should be a status pinned to the federatorMsg
// (we've already checked to ensure this is not nil).
status, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
if !ok {
err := gtserror.New("Note was not parseable as *gtsmodel.Status")
return nil, err
}
// AP statusable representation may have also
// been set on message (no problem if not).
statusable, _ := federatorMsg.APObjectModel.(ap.Statusable)
// Call refresh on status to update
// it (deref remote) if necessary.
var err error
status, _, err = p.federator.RefreshStatus(
ctx,
federatorMsg.ReceivingAccount.Username,
status,
statusable,
false,
)
if err != nil {
return nil, gtserror.Newf("%w", err)
}
return status, nil
}
func (p *Processor) statusFromAPIRI(ctx context.Context, federatorMsg messages.FromFederator) (*gtsmodel.Status, error) {
// There should be a status IRI pinned to
// the federatorMsg for us to dereference.
if federatorMsg.APIri == nil {
err := gtserror.New("status was not pinned to federatorMsg, and neither was an IRI for us to dereference")
return nil, err
}
// Get the status + ensure we have
// the most up-to-date version.
status, _, err := p.federator.GetStatusByURI(
ctx,
federatorMsg.ReceivingAccount.Username,
federatorMsg.APIri,
)
if err != nil {
return nil, gtserror.Newf("%w", err)
}
return status, nil
}
// processCreateFaveFromFederator handles Activity Create with Object Like.
func (p *Processor) processCreateFaveFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
statusFave, ok := federatorMsg.GTSModel.(*gtsmodel.StatusFave)
if !ok {
return gtserror.New("Like was not parseable as *gtsmodel.StatusFave")
}
if err := p.notifyFave(ctx, statusFave); err != nil {
return gtserror.Newf("error notifying status fave: %w", err)
}
// Interaction counts changed on the faved status;
// uncache the prepared version from all timelines.
p.invalidateStatusFromTimelines(ctx, statusFave.StatusID)
return nil
}
// processCreateFollowRequestFromFederator handles Activity Create and Object Follow
func (p *Processor) processCreateFollowRequestFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
followRequest, ok := federatorMsg.GTSModel.(*gtsmodel.FollowRequest)
if !ok {
return errors.New("incomingFollowRequest was not parseable as *gtsmodel.FollowRequest")
}
// make sure the account is pinned
if followRequest.Account == nil {
a, err := p.state.DB.GetAccountByID(ctx, followRequest.AccountID)
if err != nil {
return err
}
followRequest.Account = a
}
// Get the remote account to make sure the avi and header are cached.
if followRequest.Account.Domain != "" {
remoteAccountID, err := url.Parse(followRequest.Account.URI)
if err != nil {
return err
}
a, _, err := p.federator.GetAccountByURI(ctx,
federatorMsg.ReceivingAccount.Username,
remoteAccountID,
)
if err != nil {
return err
}
followRequest.Account = a
}
if followRequest.TargetAccount == nil {
a, err := p.state.DB.GetAccountByID(ctx, followRequest.TargetAccountID)
if err != nil {
return err
}
followRequest.TargetAccount = a
}
if *followRequest.TargetAccount.Locked {
// if the account is locked just notify the follow request and nothing else
return p.notifyFollowRequest(ctx, followRequest)
}
// if the target account isn't locked, we should already accept the follow and notify about the new follower instead
follow, err := p.state.DB.AcceptFollowRequest(ctx, followRequest.AccountID, followRequest.TargetAccountID)
if err != nil {
return err
}
if err := p.federateAcceptFollowRequest(ctx, follow); err != nil {
return err
}
return p.notifyFollow(ctx, follow, followRequest.TargetAccount)
}
// processCreateAnnounceFromFederator handles Activity Create with Object Announce.
func (p *Processor) processCreateAnnounceFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
status, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
if !ok {
return gtserror.New("Announce was not parseable as *gtsmodel.Status")
}
// Dereference status that this status boosts.
if err := p.federator.DereferenceAnnounce(ctx, status, federatorMsg.ReceivingAccount.Username); err != nil {
return gtserror.Newf("error dereferencing announce: %w", err)
}
// Generate an ID for the boost wrapper status.
statusID, err := id.NewULIDFromTime(status.CreatedAt)
if err != nil {
return gtserror.Newf("error generating id: %w", err)
}
status.ID = statusID
// Store the boost wrapper status.
if err := p.state.DB.PutStatus(ctx, status); err != nil {
return gtserror.Newf("db error inserting status: %w", err)
}
// Ensure boosted status ancestors dereferenced. We need at least
// the immediate parent (if present) to ascertain timelineability.
if err := p.federator.DereferenceStatusAncestors(ctx,
federatorMsg.ReceivingAccount.Username,
status.BoostOf,
); err != nil {
return err
}
// Timeline and notify the announce.
if err := p.timelineAndNotifyStatus(ctx, status); err != nil {
return gtserror.Newf("error timelining status: %w", err)
}
if err := p.notifyAnnounce(ctx, status); err != nil {
return gtserror.Newf("error notifying status: %w", err)
}
// Interaction counts changed on the boosted status;
// uncache the prepared version from all timelines.
p.invalidateStatusFromTimelines(ctx, status.ID)
return nil
}
// processCreateBlockFromFederator handles Activity Create and Object Block
func (p *Processor) processCreateBlockFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
block, ok := federatorMsg.GTSModel.(*gtsmodel.Block)
if !ok {
return errors.New("block was not parseable as *gtsmodel.Block")
}
// remove any of the blocking account's statuses from the blocked account's timeline, and vice versa
if err := p.state.Timelines.Home.WipeItemsFromAccountID(ctx, block.AccountID, block.TargetAccountID); err != nil {
return err
}
if err := p.state.Timelines.Home.WipeItemsFromAccountID(ctx, block.TargetAccountID, block.AccountID); err != nil {
return err
}
// TODO: same with notifications
// TODO: same with bookmarks
return nil
}
func (p *Processor) processCreateFlagFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
incomingReport, ok := federatorMsg.GTSModel.(*gtsmodel.Report)
if !ok {
return errors.New("flag was not parseable as *gtsmodel.Report")
}
// TODO: handle additional side effects of flag creation:
// - notify admins by dm / notification
return p.emailReport(ctx, incomingReport)
}
// processUpdateAccountFromFederator handles Activity Update and Object Profile
func (p *Processor) processUpdateAccountFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
incomingAccount, ok := federatorMsg.GTSModel.(*gtsmodel.Account)
if !ok {
return errors.New("*gtsmodel.Account was not parseable on update account message")
}
// Because this was an Update, the new AP Object should be set on the message.
incomingAccountable, ok := federatorMsg.APObjectModel.(ap.Accountable)
if !ok {
return errors.New("Accountable was not parseable on update account message")
}
// Fetch up-to-date bio, avatar, header, etc.
_, _, err := p.federator.RefreshAccount(
ctx,
federatorMsg.ReceivingAccount.Username,
incomingAccount,
incomingAccountable,
true,
)
if err != nil {
return fmt.Errorf("error enriching updated account from federator: %s", err)
}
return nil
}
// processDeleteStatusFromFederator handles Activity Delete and Object Note
func (p *Processor) processDeleteStatusFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
status, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
if !ok {
return errors.New("Note was not parseable as *gtsmodel.Status")
}
// Delete attachments from this status, since this request
// comes from the federating API, and there's no way the
// poster can do a delete + redraft for it on our instance.
deleteAttachments := true
if err := p.wipeStatus(ctx, status, deleteAttachments); err != nil {
return gtserror.Newf("error wiping status: %w", err)
}
if status.InReplyToID != "" {
// Interaction counts changed on the replied status;
// uncache the prepared version from all timelines.
p.invalidateStatusFromTimelines(ctx, status.InReplyToID)
}
return nil
}
// processDeleteAccountFromFederator handles Activity Delete and Object Profile
func (p *Processor) processDeleteAccountFromFederator(ctx context.Context, federatorMsg messages.FromFederator) error {
account, ok := federatorMsg.GTSModel.(*gtsmodel.Account)
if !ok {
return errors.New("account delete was not parseable as *gtsmodel.Account")
}
return p.account.Delete(ctx, account, account.ID)
}