GoToSocial/internal/processing/workers/federate.go

957 lines
25 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 workers
import (
"context"
"net/url"
"github.com/superseriousbusiness/activity/pub"
"github.com/superseriousbusiness/activity/streams"
"github.com/superseriousbusiness/gotosocial/internal/federation"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/state"
"github.com/superseriousbusiness/gotosocial/internal/typeutils"
)
// federate wraps functions for federating
// something out via ActivityPub in response
// to message processing.
type federate struct {
// Embed federator to give access
// to send and retrieve functions.
*federation.Federator
state *state.State
converter *typeutils.Converter
}
// parseURI is a cheeky little
// shortcut to wrap parsing errors.
//
// The returned err will be prepended
// with the name of the function that
// called this function, so it can be
// returned without further wrapping.
func parseURI(s string) (*url.URL, error) {
const (
// Provides enough calldepth to
// prepend the name of whatever
// function called *this* one,
// so that they don't have to
// wrap the error themselves.
calldepth = 3
errFmt = "error parsing uri %s: %w"
)
uri, err := url.Parse(s)
if err != nil {
return nil, gtserror.NewfAt(calldepth, errFmt, s, err)
}
return uri, err
}
func (f *federate) DeleteAccount(ctx context.Context, account *gtsmodel.Account) error {
// Do nothing if it's not our
// account that's been deleted.
if !account.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(account.OutboxURI)
if err != nil {
return err
}
actorIRI, err := parseURI(account.URI)
if err != nil {
return err
}
followersIRI, err := parseURI(account.FollowersURI)
if err != nil {
return err
}
publicIRI, err := parseURI(pub.PublicActivityPubIRI)
if err != nil {
return err
}
// Create a new delete.
// todo: tc.AccountToASDelete
delete := streams.NewActivityStreamsDelete()
// Set the Actor for the delete; no matter
// who actually did the delete, we should
// use the account owner for this.
deleteActor := streams.NewActivityStreamsActorProperty()
deleteActor.AppendIRI(actorIRI)
delete.SetActivityStreamsActor(deleteActor)
// Set the account's IRI as the 'object' property.
deleteObject := streams.NewActivityStreamsObjectProperty()
deleteObject.AppendIRI(actorIRI)
delete.SetActivityStreamsObject(deleteObject)
// Address the delete To followers.
deleteTo := streams.NewActivityStreamsToProperty()
deleteTo.AppendIRI(followersIRI)
delete.SetActivityStreamsTo(deleteTo)
// Address the delete CC public.
deleteCC := streams.NewActivityStreamsCcProperty()
deleteCC.AppendIRI(publicIRI)
delete.SetActivityStreamsCc(deleteCC)
// Send the Delete via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, delete,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
delete, outboxIRI, err,
)
}
return nil
}
func (f *federate) CreateStatus(ctx context.Context, status *gtsmodel.Status) error {
// Do nothing if the status
// shouldn't be federated.
if !*status.Federated {
return nil
}
// Do nothing if this
// isn't our status.
if !*status.Local {
return nil
}
// Ensure the status model is fully populated.
if err := f.state.DB.PopulateStatus(ctx, status); err != nil {
return gtserror.Newf("error populating status: %w", err)
}
// Parse the outbox URI of the status author.
outboxIRI, err := parseURI(status.Account.OutboxURI)
if err != nil {
return err
}
// Convert status to AS Statusable implementing type.
statusable, err := f.converter.StatusToAS(ctx, status)
if err != nil {
return gtserror.Newf("error converting status to Statusable: %w", err)
}
// Send a Create activity with Statusable via the Actor's outbox.
create := typeutils.WrapStatusableInCreate(statusable, false)
if _, err := f.FederatingActor().Send(ctx, outboxIRI, create); err != nil {
return gtserror.Newf("error sending Create activity via outbox %s: %w", outboxIRI, err)
}
return nil
}
func (f *federate) CreatePollVote(ctx context.Context, poll *gtsmodel.Poll, vote *gtsmodel.PollVote) error {
// Extract status from poll.
status := poll.Status
// Do nothing if the status
// shouldn't be federated.
if !*status.Federated {
return nil
}
// Do nothing if this is
// a vote in our status.
if *status.Local {
return nil
}
// Parse the outbox URI of the poll vote author.
outboxIRI, err := parseURI(vote.Account.OutboxURI)
if err != nil {
return err
}
// Convert vote to AS Create with vote choices as Objects.
create, err := f.converter.PollVoteToASCreate(ctx, vote)
if err != nil {
return gtserror.Newf("error converting to notes: %w", err)
}
// Send the Create via the Actor's outbox.
if _, err := f.FederatingActor().Send(ctx, outboxIRI, create); err != nil {
return gtserror.Newf("error sending Create activity via outbox %s: %w", outboxIRI, err)
}
return nil
}
func (f *federate) DeleteStatus(ctx context.Context, status *gtsmodel.Status) error {
// Do nothing if the status
// shouldn't be federated.
if !*status.Federated {
return nil
}
// Do nothing if this
// isn't our status.
if !*status.Local {
return nil
}
// Ensure the status model is fully populated.
if err := f.state.DB.PopulateStatus(ctx, status); err != nil {
return gtserror.Newf("error populating status: %w", err)
}
// Parse the outbox URI of the status author.
outboxIRI, err := parseURI(status.Account.OutboxURI)
if err != nil {
return err
}
// Wrap the status URI in a Delete activity.
delete, err := f.converter.StatusToASDelete(ctx, status)
if err != nil {
return gtserror.Newf("error creating Delete: %w", err)
}
// Send the Delete via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, delete,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
delete, outboxIRI, err,
)
}
return nil
}
func (f *federate) UpdateStatus(ctx context.Context, status *gtsmodel.Status) error {
// Do nothing if the status
// shouldn't be federated.
if !*status.Federated {
return nil
}
// Do nothing if this
// isn't our status.
if !*status.Local {
return nil
}
// Ensure the status model is fully populated.
if err := f.state.DB.PopulateStatus(ctx, status); err != nil {
return gtserror.Newf("error populating status: %w", err)
}
// Parse the outbox URI of the status author.
outboxIRI, err := parseURI(status.Account.OutboxURI)
if err != nil {
return err
}
// Convert status to ActivityStreams Statusable implementing type.
statusable, err := f.converter.StatusToAS(ctx, status)
if err != nil {
return gtserror.Newf("error converting status to Statusable: %w", err)
}
// Send an Update activity with Statusable via the Actor's outbox.
update := typeutils.WrapStatusableInUpdate(statusable, false)
if _, err := f.FederatingActor().Send(ctx, outboxIRI, update); err != nil {
return gtserror.Newf("error sending Update activity via outbox %s: %w", outboxIRI, err)
}
return nil
}
func (f *federate) Follow(ctx context.Context, follow *gtsmodel.Follow) error {
// Populate model.
if err := f.state.DB.PopulateFollow(ctx, follow); err != nil {
return gtserror.Newf("error populating follow: %w", err)
}
// Do nothing if both accounts are local.
if follow.Account.IsLocal() &&
follow.TargetAccount.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(follow.Account.OutboxURI)
if err != nil {
return err
}
// Convert follow to ActivityStreams Follow.
asFollow, err := f.converter.FollowToAS(ctx, follow)
if err != nil {
return gtserror.Newf("error converting follow to AS: %s", err)
}
// Send the Follow via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, asFollow,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
asFollow, outboxIRI, err,
)
}
return nil
}
func (f *federate) UndoFollow(ctx context.Context, follow *gtsmodel.Follow) error {
// Populate model.
if err := f.state.DB.PopulateFollow(ctx, follow); err != nil {
return gtserror.Newf("error populating follow: %w", err)
}
// Do nothing if both accounts are local.
if follow.Account.IsLocal() &&
follow.TargetAccount.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(follow.Account.OutboxURI)
if err != nil {
return err
}
targetAccountIRI, err := parseURI(follow.TargetAccount.URI)
if err != nil {
return err
}
// Recreate the ActivityStreams Follow.
asFollow, err := f.converter.FollowToAS(ctx, follow)
if err != nil {
return gtserror.Newf("error converting follow to AS: %w", err)
}
// Create a new Undo.
// todo: tc.FollowToASUndo
undo := streams.NewActivityStreamsUndo()
// Set the Actor for the Undo:
// same as the actor for the Follow.
undo.SetActivityStreamsActor(asFollow.GetActivityStreamsActor())
// Set recreated Follow as the 'object' property.
//
// For most AP implementations, it's not enough
// to just send the URI of the original Follow,
// we have to send the whole object again.
undoObject := streams.NewActivityStreamsObjectProperty()
undoObject.AppendActivityStreamsFollow(asFollow)
undo.SetActivityStreamsObject(undoObject)
// Address the Undo To the target account.
undoTo := streams.NewActivityStreamsToProperty()
undoTo.AppendIRI(targetAccountIRI)
undo.SetActivityStreamsTo(undoTo)
// Send the Undo via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, undo,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
undo, outboxIRI, err,
)
}
return nil
}
func (f *federate) UndoLike(ctx context.Context, fave *gtsmodel.StatusFave) error {
// Populate model.
if err := f.state.DB.PopulateStatusFave(ctx, fave); err != nil {
return gtserror.Newf("error populating fave: %w", err)
}
// Do nothing if both accounts are local.
if fave.Account.IsLocal() &&
fave.TargetAccount.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(fave.Account.OutboxURI)
if err != nil {
return err
}
targetAccountIRI, err := parseURI(fave.TargetAccount.URI)
if err != nil {
return err
}
// Recreate the ActivityStreams Like.
like, err := f.converter.FaveToAS(ctx, fave)
if err != nil {
return gtserror.Newf("error converting fave to AS: %w", err)
}
// Create a new Undo.
// todo: tc.FaveToASUndo
undo := streams.NewActivityStreamsUndo()
// Set the Actor for the Undo:
// same as the actor for the Like.
undo.SetActivityStreamsActor(like.GetActivityStreamsActor())
// Set recreated Like as the 'object' property.
//
// For most AP implementations, it's not enough
// to just send the URI of the original Like,
// we have to send the whole object again.
undoObject := streams.NewActivityStreamsObjectProperty()
undoObject.AppendActivityStreamsLike(like)
undo.SetActivityStreamsObject(undoObject)
// Address the Undo To the target account.
undoTo := streams.NewActivityStreamsToProperty()
undoTo.AppendIRI(targetAccountIRI)
undo.SetActivityStreamsTo(undoTo)
// Send the Undo via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, undo,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
undo, outboxIRI, err,
)
}
return nil
}
func (f *federate) UndoAnnounce(ctx context.Context, boost *gtsmodel.Status) error {
// Populate model.
if err := f.state.DB.PopulateStatus(ctx, boost); err != nil {
return gtserror.Newf("error populating status: %w", err)
}
// Do nothing if boosting
// account isn't ours.
if !boost.Account.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(boost.Account.OutboxURI)
if err != nil {
return err
}
// Recreate the ActivityStreams Announce.
asAnnounce, err := f.converter.BoostToAS(
ctx,
boost,
boost.Account,
boost.BoostOfAccount,
)
if err != nil {
return gtserror.Newf("error converting boost to AS: %w", err)
}
// Create a new Undo.
// todo: tc.AnnounceToASUndo
undo := streams.NewActivityStreamsUndo()
// Set the Actor for the Undo:
// same as the actor for the Announce.
undo.SetActivityStreamsActor(asAnnounce.GetActivityStreamsActor())
// Set recreated Announce as the 'object' property.
//
// For most AP implementations, it's not enough
// to just send the URI of the original Announce,
// we have to send the whole object again.
undoObject := streams.NewActivityStreamsObjectProperty()
undoObject.AppendActivityStreamsAnnounce(asAnnounce)
undo.SetActivityStreamsObject(undoObject)
// Address the Undo To the Announce To.
undo.SetActivityStreamsTo(asAnnounce.GetActivityStreamsTo())
// Address the Undo CC the Announce CC.
undo.SetActivityStreamsCc(asAnnounce.GetActivityStreamsCc())
// Send the Undo via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, undo,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
undo, outboxIRI, err,
)
}
return nil
}
func (f *federate) AcceptFollow(ctx context.Context, follow *gtsmodel.Follow) error {
// Populate model.
if err := f.state.DB.PopulateFollow(ctx, follow); err != nil {
return gtserror.Newf("error populating follow: %w", err)
}
// Bail if requesting account is ours:
// we've already accepted internally and
// shouldn't send an Accept to ourselves.
if follow.Account.IsLocal() {
return nil
}
// Bail if target account isn't ours:
// we can't Accept a follow on
// another instance's behalf.
if follow.TargetAccount.IsRemote() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(follow.TargetAccount.OutboxURI)
if err != nil {
return err
}
acceptingAccountIRI, err := parseURI(follow.TargetAccount.URI)
if err != nil {
return err
}
requestingAccountIRI, err := parseURI(follow.Account.URI)
if err != nil {
return err
}
// Recreate the ActivityStreams Follow.
asFollow, err := f.converter.FollowToAS(ctx, follow)
if err != nil {
return gtserror.Newf("error converting follow to AS: %w", err)
}
// Create a new Accept.
// todo: tc.FollowToASAccept
accept := streams.NewActivityStreamsAccept()
// Set the requestee as Actor of the Accept.
acceptActorProp := streams.NewActivityStreamsActorProperty()
acceptActorProp.AppendIRI(acceptingAccountIRI)
accept.SetActivityStreamsActor(acceptActorProp)
// Set recreated Follow as the 'object' property.
//
// For most AP implementations, it's not enough
// to just send the URI of the original Follow,
// we have to send the whole object again.
acceptObject := streams.NewActivityStreamsObjectProperty()
acceptObject.AppendActivityStreamsFollow(asFollow)
accept.SetActivityStreamsObject(acceptObject)
// Address the Accept To the Follow requester.
acceptTo := streams.NewActivityStreamsToProperty()
acceptTo.AppendIRI(requestingAccountIRI)
accept.SetActivityStreamsTo(acceptTo)
// Send the Accept via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, accept,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
accept, outboxIRI, err,
)
}
return nil
}
func (f *federate) RejectFollow(ctx context.Context, follow *gtsmodel.Follow) error {
// Ensure follow populated before proceeding.
if err := f.state.DB.PopulateFollow(ctx, follow); err != nil {
return gtserror.Newf("error populating follow: %w", err)
}
// Bail if requesting account is ours:
// we've already rejected internally and
// shouldn't send an Reject to ourselves.
if follow.Account.IsLocal() {
return nil
}
// Bail if target account isn't ours:
// we can't Reject a follow on
// another instance's behalf.
if follow.TargetAccount.IsRemote() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(follow.TargetAccount.OutboxURI)
if err != nil {
return err
}
rejectingAccountIRI, err := parseURI(follow.TargetAccount.URI)
if err != nil {
return err
}
requestingAccountIRI, err := parseURI(follow.Account.URI)
if err != nil {
return err
}
// Recreate the ActivityStreams Follow.
asFollow, err := f.converter.FollowToAS(ctx, follow)
if err != nil {
return gtserror.Newf("error converting follow to AS: %w", err)
}
// Create a new Reject.
// todo: tc.FollowRequestToASReject
reject := streams.NewActivityStreamsReject()
// Set the requestee as Actor of the Reject.
rejectActorProp := streams.NewActivityStreamsActorProperty()
rejectActorProp.AppendIRI(rejectingAccountIRI)
reject.SetActivityStreamsActor(rejectActorProp)
// Set recreated Follow as the 'object' property.
//
// For most AP implementations, it's not enough
// to just send the URI of the original Follow,
// we have to send the whole object again.
rejectObject := streams.NewActivityStreamsObjectProperty()
rejectObject.AppendActivityStreamsFollow(asFollow)
reject.SetActivityStreamsObject(rejectObject)
// Address the Reject To the Follow requester.
rejectTo := streams.NewActivityStreamsToProperty()
rejectTo.AppendIRI(requestingAccountIRI)
reject.SetActivityStreamsTo(rejectTo)
// Send the Reject via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, reject,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
reject, outboxIRI, err,
)
}
return nil
}
func (f *federate) Like(ctx context.Context, fave *gtsmodel.StatusFave) error {
// Populate model.
if err := f.state.DB.PopulateStatusFave(ctx, fave); err != nil {
return gtserror.Newf("error populating fave: %w", err)
}
// Do nothing if both accounts are local.
if fave.Account.IsLocal() &&
fave.TargetAccount.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(fave.Account.OutboxURI)
if err != nil {
return err
}
// Create the ActivityStreams Like.
like, err := f.converter.FaveToAS(ctx, fave)
if err != nil {
return gtserror.Newf("error converting fave to AS Like: %w", err)
}
// Send the Like via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, like,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
like, outboxIRI, err,
)
}
return nil
}
func (f *federate) Announce(ctx context.Context, boost *gtsmodel.Status) error {
// Populate model.
if err := f.state.DB.PopulateStatus(ctx, boost); err != nil {
return gtserror.Newf("error populating status: %w", err)
}
// Do nothing if boosting
// account isn't ours.
if !boost.Account.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(boost.Account.OutboxURI)
if err != nil {
return err
}
// Create the ActivityStreams Announce.
announce, err := f.converter.BoostToAS(
ctx,
boost,
boost.Account,
boost.BoostOfAccount,
)
if err != nil {
return gtserror.Newf("error converting boost to AS: %w", err)
}
// Send the Announce via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, announce,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
announce, outboxIRI, err,
)
}
return nil
}
func (f *federate) UpdateAccount(ctx context.Context, account *gtsmodel.Account) error {
// Populate model.
if err := f.state.DB.PopulateAccount(ctx, account); err != nil {
return gtserror.Newf("error populating account: %w", err)
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(account.OutboxURI)
if err != nil {
return err
}
// Convert account to ActivityStreams Person.
person, err := f.converter.AccountToAS(ctx, account)
if err != nil {
return gtserror.Newf("error converting account to Person: %w", err)
}
// Use ActivityStreams Person as Object of Update.
update, err := f.converter.WrapPersonInUpdate(person, account)
if err != nil {
return gtserror.Newf("error wrapping Person in Update: %w", err)
}
// Send the Update via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, update,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
update, outboxIRI, err,
)
}
return nil
}
func (f *federate) Block(ctx context.Context, block *gtsmodel.Block) error {
// Populate model.
if err := f.state.DB.PopulateBlock(ctx, block); err != nil {
return gtserror.Newf("error populating block: %w", err)
}
// Do nothing if both accounts are local.
if block.Account.IsLocal() &&
block.TargetAccount.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(block.Account.OutboxURI)
if err != nil {
return err
}
// Convert block to ActivityStreams Block.
asBlock, err := f.converter.BlockToAS(ctx, block)
if err != nil {
return gtserror.Newf("error converting block to AS: %w", err)
}
// Send the Block via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, asBlock,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
asBlock, outboxIRI, err,
)
}
return nil
}
func (f *federate) UndoBlock(ctx context.Context, block *gtsmodel.Block) error {
// Populate model.
if err := f.state.DB.PopulateBlock(ctx, block); err != nil {
return gtserror.Newf("error populating block: %w", err)
}
// Do nothing if both accounts are local.
if block.Account.IsLocal() &&
block.TargetAccount.IsLocal() {
return nil
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(block.Account.OutboxURI)
if err != nil {
return err
}
targetAccountIRI, err := parseURI(block.TargetAccount.URI)
if err != nil {
return err
}
// Convert block to ActivityStreams Block.
asBlock, err := f.converter.BlockToAS(ctx, block)
if err != nil {
return gtserror.Newf("error converting block to AS: %w", err)
}
// Create a new Undo.
// todo: tc.BlockToASUndo
undo := streams.NewActivityStreamsUndo()
// Set the Actor for the Undo:
// same as the actor for the Block.
undo.SetActivityStreamsActor(asBlock.GetActivityStreamsActor())
// Set Block as the 'object' property.
//
// For most AP implementations, it's not enough
// to just send the URI of the original Block,
// we have to send the whole object again.
undoObject := streams.NewActivityStreamsObjectProperty()
undoObject.AppendActivityStreamsBlock(asBlock)
undo.SetActivityStreamsObject(undoObject)
// Address the Undo To the target account.
undoTo := streams.NewActivityStreamsToProperty()
undoTo.AppendIRI(targetAccountIRI)
undo.SetActivityStreamsTo(undoTo)
// Send the Undo via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, undo,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
undo, outboxIRI, err,
)
}
return nil
}
func (f *federate) Flag(ctx context.Context, report *gtsmodel.Report) error {
// Populate model.
if err := f.state.DB.PopulateReport(ctx, report); err != nil {
return gtserror.Newf("error populating report: %w", err)
}
// Do nothing if report target
// is not remote account.
if report.TargetAccount.IsLocal() {
return nil
}
// Get our instance account from the db:
// to anonymize the report, we'll deliver
// using the outbox of the instance account.
instanceAcct, err := f.state.DB.GetInstanceAccount(ctx, "")
if err != nil {
return gtserror.Newf("error getting instance account: %w", err)
}
// Parse relevant URI(s).
outboxIRI, err := parseURI(instanceAcct.OutboxURI)
if err != nil {
return err
}
targetAccountIRI, err := parseURI(report.TargetAccount.URI)
if err != nil {
return err
}
// Convert report to ActivityStreams Flag.
flag, err := f.converter.ReportToASFlag(ctx, report)
if err != nil {
return gtserror.Newf("error converting report to AS: %w", err)
}
// To is not set explicitly on Flags. Instead,
// address Flag BTo report target account URI.
// This ensures that our federating actor still
// knows where to send the report, but the BTo
// property will be stripped before sending.
//
// Happily, BTo does not prevent federating
// actor from using shared inbox to deliver.
bTo := streams.NewActivityStreamsBtoProperty()
bTo.AppendIRI(targetAccountIRI)
flag.SetActivityStreamsBto(bTo)
// Send the Flag via the Actor's outbox.
if _, err := f.FederatingActor().Send(
ctx, outboxIRI, flag,
); err != nil {
return gtserror.Newf(
"error sending activity %T via outbox %s: %w",
flag, outboxIRI, err,
)
}
return nil
}