GoToSocial/internal/federation/federatingdb/util.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 federatingdb
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/url"
"github.com/go-fed/activity/streams"
"github.com/go-fed/activity/streams/vocab"
"github.com/sirupsen/logrus"
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"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/messages"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
func sameActor(activityActor vocab.ActivityStreamsActorProperty, followActor vocab.ActivityStreamsActorProperty) bool {
if activityActor == nil || followActor == nil {
return false
}
for aIter := activityActor.Begin(); aIter != activityActor.End(); aIter = aIter.Next() {
for fIter := followActor.Begin(); fIter != followActor.End(); fIter = fIter.Next() {
if aIter.GetIRI() == nil {
return false
}
if fIter.GetIRI() == nil {
return false
}
if aIter.GetIRI().String() == fIter.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) {
l := logrus.WithFields(
logrus.Fields{
"func": "NewID",
},
)
if logrus.GetLevel() >= logrus.DebugLevel {
i, err := marshalItem(t)
if err != nil {
return nil, err
}
l = l.WithField("newID", i)
l.Debug("entering NewID")
}
switch t.GetTypeName() {
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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.db.GetAccountByURI(ctx, iter.GetIRI().String()); err == nil {
newID, err := id.NewRandomULID()
if err != nil {
return nil, err
}
return url.Parse(util.GenerateURIForFollow(actorAccount.Username, f.config.Protocol, f.config.Host, newID))
}
}
}
}
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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
}
}
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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
}
}
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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
}
}
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case ap.ActivityUpdate:
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// 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")
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}
idProp := update.GetJSONLDId()
if idProp != nil {
if idProp.IsIRI() {
return idProp.GetIRI(), nil
}
}
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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
}
}
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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", f.config.Protocol, f.config.Host, 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) (account *gtsmodel.Account, err error) {
acct := &gtsmodel.Account{}
if util.IsInboxPath(iri) {
if err := f.db.GetWhere(ctx, []db.Where{{Key: "inbox_uri", Value: iri.String()}}, acct); 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
}
if util.IsOutboxPath(iri) {
if err := f.db.GetWhere(ctx, []db.Where{{Key: "outbox_uri", Value: iri.String()}}, acct); 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
}
if util.IsUserPath(iri) {
if err := f.db.GetWhere(ctx, []db.Where{{Key: "uri", Value: iri.String()}}, acct); 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
}
if util.IsFollowersPath(iri) {
if err := f.db.GetWhere(ctx, []db.Where{{Key: "followers_uri", Value: iri.String()}}, acct); 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
}
if util.IsFollowingPath(iri) {
if err := f.db.GetWhere(ctx, []db.Where{{Key: "following_uri", Value: iri.String()}}, acct); 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
}
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 via the API:
// - The target account that owns the inbox or URI being interacted with.
// - The requesting account that posted to the inbox.
// - A channel that messages for the processor can be placed into.
// If a value is not present, nil will be returned for it. It's up to the caller to check this and respond appropriately.
func extractFromCtx(ctx context.Context) (receivingAccount, requestingAccount *gtsmodel.Account, fromFederatorChan chan messages.FromFederator) {
receivingAccountI := ctx.Value(util.APReceivingAccount)
if receivingAccountI != nil {
receivingAccount = receivingAccountI.(*gtsmodel.Account)
}
requestingAcctI := ctx.Value(util.APRequestingAccount)
if requestingAcctI != nil {
requestingAccount = requestingAcctI.(*gtsmodel.Account)
}
fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
if fromFederatorChanI != nil {
fromFederatorChan = fromFederatorChanI.(chan messages.FromFederator)
}
return
}
func marshalItem(item vocab.Type) (string, error) {
m, err := streams.Serialize(item)
if err != nil {
return "", err
}
b, err := json.Marshal(m)
if err != nil {
return "", err
}
return string(b), nil
}