gotosocial/internal/federation/federatingdb/util.go

284 lines
8.9 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"
"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 typeNames(objects []ap.TypeOrIRI) []string {
names := make([]string, len(objects))
for i, object := range objects {
if object.IsIRI() {
names[i] = "IRI"
} else if t := object.GetType(); t != nil {
names[i] = t.GetTypeName()
} else {
names[i] = "nil"
}
}
return names
}
// isSender returns whether an object with AttributedTo property comes from the given requesting account.
func isSender(with ap.WithAttributedTo, requester *gtsmodel.Account) bool {
for _, uri := range ap.GetAttributedTo(with) {
if uri.String() == requester.URI {
return true
}
}
return false
}
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")
}
// Most of our types set an ID already
// by this point, return this if found.
idProp := t.GetJSONLDId()
if idProp != nil && idProp.IsIRI() {
return idProp.GetIRI(), nil
}
if t.GetTypeName() == ap.ActivityFollow {
follow, _ := t.(vocab.ActivityStreamsFollow)
// If an actor URI has been set, create a new ID
// based on actor (i.e. followER not the followEE).
if uri := ap.GetActorIRIs(follow); len(uri) == 1 {
if actorAccount, err := f.state.DB.GetAccountByURI(ctx, uri[0].String()); err == nil {
newID, err := id.NewRandomULID()
if err != nil {
return nil, err
}
return url.Parse(uris.GenerateURIForFollow(actorAccount.Username, newID))
}
}
}
// Default fallback behaviour:
// {proto}://{host}/{randomID}
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
}
// activityContext represents the context in
// which a call to one of the federatingdb
// functions is taking place, including the
// account who initiated the request via POST
// to an inbox, and the account who received
// the request in their inbox.
type activityContext struct {
// The account that owns the inbox
// or URI being interacted with.
receivingAcct *gtsmodel.Account
// The account whose keyId was used
// to POST a request to the inbox.
requestingAcct *gtsmodel.Account
// Whether this is an internal request,
// ie., one originating not from the
// API but from inside the instance.
//
// If the request is internal, it's
// safe to assume that the activity
// has already been processed elsewhere,
// and we can return with no action.
internal bool
}
// getActivityContext extracts the context in
// which an Activity is taking place from the
// context.Context passed in to one of the
// federatingdb functions.
func getActivityContext(ctx context.Context) activityContext {
receivingAcct := gtscontext.ReceivingAccount(ctx)
requestingAcct := gtscontext.RequestingAccount(ctx)
// If the receiving account wasn't set on
// the context, that means this request
// didn't pass through the fedi API, but
// came from inside the instance as the
// result of a local activity.
internal := receivingAcct == nil
return activityContext{
receivingAcct: receivingAcct,
requestingAcct: requestingAcct,
internal: internal,
}
}
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
}