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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 (
"context"
"errors"
"fmt"
"net/url"
"github.com/go-fed/activity/streams"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
func (p *processor) processFromClientAPI(clientMsg gtsmodel.FromClientAPI) error {
switch clientMsg.APActivityType {
case gtsmodel.ActivityStreamsCreate:
// CREATE
switch clientMsg.APObjectType {
case gtsmodel.ActivityStreamsNote:
// CREATE NOTE
status, ok := clientMsg.GTSModel.(*gtsmodel.Status)
if !ok {
return errors.New("note was not parseable as *gtsmodel.Status")
}
if err := p.notifyStatus(status); err != nil {
return err
}
if status.VisibilityAdvanced.Federated {
return p.federateStatus(status)
}
return nil
case gtsmodel.ActivityStreamsFollow:
// CREATE FOLLOW (request)
follow, ok := clientMsg.GTSModel.(*gtsmodel.Follow)
if !ok {
return errors.New("follow was not parseable as *gtsmodel.Follow")
}
if err := p.notifyFollow(follow); err != nil {
return err
}
return p.federateFollow(follow, clientMsg.OriginAccount, clientMsg.TargetAccount)
}
case gtsmodel.ActivityStreamsUpdate:
// UPDATE
case gtsmodel.ActivityStreamsAccept:
// ACCEPT
switch clientMsg.APObjectType {
case gtsmodel.ActivityStreamsFollow:
// ACCEPT FOLLOW
follow, ok := clientMsg.GTSModel.(*gtsmodel.Follow)
if !ok {
return errors.New("accept was not parseable as *gtsmodel.Follow")
}
return p.federateAcceptFollowRequest(follow, clientMsg.OriginAccount, clientMsg.TargetAccount)
}
case gtsmodel.ActivityStreamsUndo:
// UNDO
switch clientMsg.APObjectType {
case gtsmodel.ActivityStreamsFollow:
// UNDO FOLLOW
follow, ok := clientMsg.GTSModel.(*gtsmodel.Follow)
if !ok {
return errors.New("undo was not parseable as *gtsmodel.Follow")
}
return p.federateUnfollow(follow, clientMsg.OriginAccount, clientMsg.TargetAccount)
}
}
return nil
}
func (p *processor) federateStatus(status *gtsmodel.Status) error {
asStatus, err := p.tc.StatusToAS(status)
if err != nil {
return fmt.Errorf("federateStatus: error converting status to as format: %s", err)
}
outboxIRI, err := url.Parse(status.GTSAccount.OutboxURI)
if err != nil {
return fmt.Errorf("federateStatus: error parsing outboxURI %s: %s", status.GTSAccount.OutboxURI, err)
}
_, err = p.federator.FederatingActor().Send(context.Background(), outboxIRI, asStatus)
return err
}
func (p *processor) federateFollow(follow *gtsmodel.Follow, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) error {
// if both accounts are local there's nothing to do here
if originAccount.Domain == "" && targetAccount.Domain == "" {
return nil
}
asFollow, err := p.tc.FollowToAS(follow, originAccount, targetAccount)
if err != nil {
return fmt.Errorf("federateFollow: error converting follow to as format: %s", err)
}
outboxIRI, err := url.Parse(originAccount.OutboxURI)
if err != nil {
return fmt.Errorf("federateFollow: error parsing outboxURI %s: %s", originAccount.OutboxURI, err)
}
_, err = p.federator.FederatingActor().Send(context.Background(), outboxIRI, asFollow)
return err
}
func (p *processor) federateUnfollow(follow *gtsmodel.Follow, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) error {
// if both accounts are local there's nothing to do here
if originAccount.Domain == "" && targetAccount.Domain == "" {
return nil
}
// recreate the follow
asFollow, err := p.tc.FollowToAS(follow, originAccount, targetAccount)
if err != nil {
return fmt.Errorf("federateUnfollow: error converting follow to as format: %s", err)
}
targetAccountURI, err := url.Parse(targetAccount.URI)
if err != nil {
return fmt.Errorf("error parsing uri %s: %s", targetAccount.URI, err)
}
// create an Undo and set the appropriate actor on it
undo := streams.NewActivityStreamsUndo()
undo.SetActivityStreamsActor(asFollow.GetActivityStreamsActor())
// Set the recreated follow as the 'object' property.
undoObject := streams.NewActivityStreamsObjectProperty()
undoObject.AppendActivityStreamsFollow(asFollow)
undo.SetActivityStreamsObject(undoObject)
// Set the To of the undo as the target of the recreated follow
undoTo := streams.NewActivityStreamsToProperty()
undoTo.AppendIRI(targetAccountURI)
undo.SetActivityStreamsTo(undoTo)
outboxIRI, err := url.Parse(originAccount.OutboxURI)
if err != nil {
return fmt.Errorf("federateUnfollow: error parsing outboxURI %s: %s", originAccount.OutboxURI, err)
}
// send off the Undo
_, err = p.federator.FederatingActor().Send(context.Background(), outboxIRI, undo)
return err
}
func (p *processor) federateAcceptFollowRequest(follow *gtsmodel.Follow, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) error {
// if both accounts are local there's nothing to do here
if originAccount.Domain == "" && targetAccount.Domain == "" {
return nil
}
// recreate the AS follow
asFollow, err := p.tc.FollowToAS(follow, originAccount, targetAccount)
if err != nil {
return fmt.Errorf("federateUnfollow: error converting follow to as format: %s", err)
}
acceptingAccountURI, err := url.Parse(targetAccount.URI)
if err != nil {
return fmt.Errorf("error parsing uri %s: %s", targetAccount.URI, err)
}
requestingAccountURI, err := url.Parse(originAccount.URI)
if err != nil {
return fmt.Errorf("error parsing uri %s: %s", targetAccount.URI, err)
}
// create an Accept
accept := streams.NewActivityStreamsAccept()
// set the accepting actor on it
acceptActorProp := streams.NewActivityStreamsActorProperty()
acceptActorProp.AppendIRI(acceptingAccountURI)
accept.SetActivityStreamsActor(acceptActorProp)
// Set the recreated follow as the 'object' property.
acceptObject := streams.NewActivityStreamsObjectProperty()
acceptObject.AppendActivityStreamsFollow(asFollow)
accept.SetActivityStreamsObject(acceptObject)
// Set the To of the accept as the originator of the follow
acceptTo := streams.NewActivityStreamsToProperty()
acceptTo.AppendIRI(requestingAccountURI)
accept.SetActivityStreamsTo(acceptTo)
outboxIRI, err := url.Parse(targetAccount.OutboxURI)
if err != nil {
return fmt.Errorf("federateAcceptFollowRequest: error parsing outboxURI %s: %s", originAccount.OutboxURI, err)
}
// send off the accept using the accepter's outbox
_, err = p.federator.FederatingActor().Send(context.Background(), outboxIRI, accept)
return err
}
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