gotosocial/internal/federation/federatingdb/util.go

333 lines
11 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 federatingdb
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/url"
"codeberg.org/gruf/go-logger/v2/level"
"github.com/superseriousbusiness/activity/streams"
"github.com/superseriousbusiness/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
func sameActor(actor1 vocab.ActivityStreamsActorProperty, actor2 vocab.ActivityStreamsActorProperty) bool {
if actor1 == nil || actor2 == nil {
return false
}
for a1Iter := actor1.Begin(); a1Iter != actor1.End(); a1Iter = a1Iter.Next() {
for a2Iter := actor2.Begin(); a2Iter != actor2.End(); a2Iter = a2Iter.Next() {
if a1Iter.GetIRI() == nil {
return false
}
if a2Iter.GetIRI() == nil {
return false
}
if a1Iter.GetIRI().String() == a2Iter.GetIRI().String() {
return true
}
}
}
return false
}
// NewID creates a new IRI id for the provided activity or object. The
// implementation does not need to set the 'id' property and simply
// needs to determine the value.
//
// The go-fed library will handle setting the 'id' property on the
// activity or object provided with the value returned.
func (f *federatingDB) NewID(ctx context.Context, t vocab.Type) (idURL *url.URL, err error) {
if log.Level() >= level.DEBUG {
i, err := marshalItem(t)
if err != nil {
return nil, err
}
l := log.WithContext(ctx).
WithField("newID", i)
l.Debug("entering NewID")
}
switch t.GetTypeName() {
case ap.ActivityFollow:
// FOLLOW
// ID might already be set on a follow we've created, so check it here and return it if it is
follow, ok := t.(vocab.ActivityStreamsFollow)
if !ok {
return nil, errors.New("newid: follow couldn't be parsed into vocab.ActivityStreamsFollow")
}
idProp := follow.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
// it's not set so create one based on the actor set on the follow (ie., the followER not the followEE)
actorProp := follow.GetActivityStreamsActor()
if actorProp != nil {
for iter := actorProp.Begin(); iter != actorProp.End(); iter = iter.Next() {
// take the IRI of the first actor we can find (there should only be one)
if iter.IsIRI() {
// if there's an error here, just use the fallback behavior -- we don't need to return an error here
if actorAccount, err := f.state.DB.GetAccountByURI(ctx, iter.GetIRI().String()); err == nil {
newID, err := id.NewRandomULID()
if err != nil {
return nil, err
}
return url.Parse(uris.GenerateURIForFollow(actorAccount.Username, newID))
}
}
}
}
case ap.ObjectNote:
// NOTE aka STATUS
// ID might already be set on a note we've created, so check it here and return it if it is
note, ok := t.(vocab.ActivityStreamsNote)
if !ok {
return nil, errors.New("newid: note couldn't be parsed into vocab.ActivityStreamsNote")
}
idProp := note.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
case ap.ActivityLike:
// LIKE aka FAVE
// ID might already be set on a fave we've created, so check it here and return it if it is
fave, ok := t.(vocab.ActivityStreamsLike)
if !ok {
return nil, errors.New("newid: fave couldn't be parsed into vocab.ActivityStreamsLike")
}
idProp := fave.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
case ap.ActivityCreate:
// CREATE
// ID might already be set on a Create, so check it here and return it if it is
create, ok := t.(vocab.ActivityStreamsCreate)
if !ok {
return nil, errors.New("newid: create couldn't be parsed into vocab.ActivityStreamsCreate")
}
idProp := create.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
case ap.ActivityAnnounce:
// ANNOUNCE aka BOOST
// ID might already be set on an announce we've created, so check it here and return it if it is
announce, ok := t.(vocab.ActivityStreamsAnnounce)
if !ok {
return nil, errors.New("newid: announce couldn't be parsed into vocab.ActivityStreamsAnnounce")
}
idProp := announce.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
case ap.ActivityUpdate:
// UPDATE
// ID might already be set on an update we've created, so check it here and return it if it is
update, ok := t.(vocab.ActivityStreamsUpdate)
if !ok {
return nil, errors.New("newid: update couldn't be parsed into vocab.ActivityStreamsUpdate")
}
idProp := update.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
case ap.ActivityBlock:
// BLOCK
// ID might already be set on a block we've created, so check it here and return it if it is
block, ok := t.(vocab.ActivityStreamsBlock)
if !ok {
return nil, errors.New("newid: block couldn't be parsed into vocab.ActivityStreamsBlock")
}
idProp := block.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
case ap.ActivityUndo:
// UNDO
// ID might already be set on an undo we've created, so check it here and return it if it is
undo, ok := t.(vocab.ActivityStreamsUndo)
if !ok {
return nil, errors.New("newid: undo couldn't be parsed into vocab.ActivityStreamsUndo")
}
idProp := undo.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
}
// fallback default behavior: just return a random ULID after our protocol and host
newID, err := id.NewRandomULID()
if err != nil {
return nil, err
}
return url.Parse(fmt.Sprintf("%s://%s/%s", config.GetProtocol(), config.GetHost(), newID))
}
// ActorForOutbox fetches the actor's IRI for the given outbox IRI.
//
// The library makes this call only after acquiring a lock first.
func (f *federatingDB) ActorForOutbox(ctx context.Context, outboxIRI *url.URL) (actorIRI *url.URL, err error) {
acct, err := f.getAccountForIRI(ctx, outboxIRI)
if err != nil {
return nil, err
}
return url.Parse(acct.URI)
}
// ActorForInbox fetches the actor's IRI for the given outbox IRI.
//
// The library makes this call only after acquiring a lock first.
func (f *federatingDB) ActorForInbox(ctx context.Context, inboxIRI *url.URL) (actorIRI *url.URL, err error) {
acct, err := f.getAccountForIRI(ctx, inboxIRI)
if err != nil {
return nil, err
}
return url.Parse(acct.URI)
}
// getAccountForIRI returns the account that corresponds to or owns the given IRI.
func (f *federatingDB) getAccountForIRI(ctx context.Context, iri *url.URL) (*gtsmodel.Account, error) {
var (
acct *gtsmodel.Account
err error
)
switch {
case uris.IsUserPath(iri):
if acct, err = f.state.DB.GetAccountByURI(ctx, iri.String()); err != nil {
if err == db.ErrNoEntries {
return nil, fmt.Errorf("no actor found that corresponds to uri %s", iri.String())
}
return nil, fmt.Errorf("db error searching for actor with uri %s", iri.String())
}
return acct, nil
case uris.IsInboxPath(iri):
if acct, err = f.state.DB.GetAccountByInboxURI(ctx, iri.String()); err != nil {
if err == db.ErrNoEntries {
return nil, fmt.Errorf("no actor found that corresponds to inbox %s", iri.String())
}
return nil, fmt.Errorf("db error searching for actor with inbox %s", iri.String())
}
return acct, nil
case uris.IsOutboxPath(iri):
if acct, err = f.state.DB.GetAccountByOutboxURI(ctx, iri.String()); err != nil {
if err == db.ErrNoEntries {
return nil, fmt.Errorf("no actor found that corresponds to outbox %s", iri.String())
}
return nil, fmt.Errorf("db error searching for actor with outbox %s", iri.String())
}
return acct, nil
case uris.IsFollowersPath(iri):
if acct, err = f.state.DB.GetAccountByFollowersURI(ctx, iri.String()); err != nil {
if err == db.ErrNoEntries {
return nil, fmt.Errorf("no actor found that corresponds to followers_uri %s", iri.String())
}
return nil, fmt.Errorf("db error searching for actor with followers_uri %s", iri.String())
}
return acct, nil
case uris.IsFollowingPath(iri):
if acct, err = f.state.DB.GetAccountByFollowingURI(ctx, iri.String()); err != nil {
if err == db.ErrNoEntries {
return nil, fmt.Errorf("no actor found that corresponds to following_uri %s", iri.String())
}
return nil, fmt.Errorf("db error searching for actor with following_uri %s", iri.String())
}
return acct, nil
default:
return nil, fmt.Errorf("getActorForIRI: iri %s not recognised", iri)
}
}
// collectFollows takes a slice of iris and converts them into ActivityStreamsCollection of IRIs.
func (f *federatingDB) collectIRIs(ctx context.Context, iris []*url.URL) (vocab.ActivityStreamsCollection, error) {
collection := streams.NewActivityStreamsCollection()
items := streams.NewActivityStreamsItemsProperty()
for _, i := range iris {
items.AppendIRI(i)
}
collection.SetActivityStreamsItems(items)
return collection, nil
}
// extractFromCtx extracts some useful values from a context passed into the federatingDB:
//
// - The account that owns the inbox or URI being interacted with.
// - The account that POSTed a request to the inbox.
// - Whether this is an internal request (one originating not from
// the API but from inside the instance).
//
// If the request is internal, the caller can assume that the activity has
// already been processed elsewhere, and should return with no further action.
func extractFromCtx(ctx context.Context) (receivingAccount *gtsmodel.Account, requestingAccount *gtsmodel.Account, internal bool) {
receivingAccount = gtscontext.ReceivingAccount(ctx)
requestingAccount = gtscontext.RequestingAccount(ctx)
// If the receiving account wasn't set on the context, that
// means this request didn't pass through the API, but
// came from inside GtS as the result of a local activity.
internal = receivingAccount == nil
return
}
func marshalItem(item vocab.Type) (string, error) {
m, err := ap.Serialize(item)
if err != nil {
return "", err
}
b, err := json.Marshal(m)
if err != nil {
return "", err
}
return string(b), nil
}