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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 db
import (
"context"
"errors"
"net/url"
"sync"
"github.com/go-fed/activity/pub"
"github.com/go-fed/activity/streams"
"github.com/go-fed/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/config"
)
// FederatingDB uses the underlying DB interface to implement the go-fed pub.Database interface.
// It doesn't care what the underlying implementation of the DB interface is, as long as it works.
type federatingDB struct {
locks *sync.Map
db DB
config *config.Config
}
func newFederatingDB(db DB, config *config.Config) pub.Database {
return &federatingDB{
locks: new(sync.Map),
db: db,
config: config,
}
}
/*
GO-FED DB INTERFACE-IMPLEMENTING FUNCTIONS
*/
func (f *federatingDB) Lock(ctx context.Context, id *url.URL) error {
// Before any other Database methods are called, the relevant `id`
// entries are locked to allow for fine-grained concurrency.
// Strategy: create a new lock, if stored, continue. Otherwise, lock the
// existing mutex.
mu := &sync.Mutex{}
mu.Lock() // Optimistically lock if we do store it.
i, loaded := f.locks.LoadOrStore(id.String(), mu)
if loaded {
mu = i.(*sync.Mutex)
mu.Lock()
}
return nil
}
func (f *federatingDB) Unlock(ctx context.Context, id *url.URL) error {
// Once Go-Fed is done calling Database methods, the relevant `id`
// entries are unlocked.
i, ok := f.locks.Load(id.String())
if !ok {
return errors.New("missing an id in unlock")
}
mu := i.(*sync.Mutex)
mu.Unlock()
return nil
}
func (f *federatingDB) InboxContains(ctx context.Context, inbox *url.URL, id *url.URL) (bool, error) {
return false, nil
}
func (f *federatingDB) GetInbox(ctx context.Context, inboxIRI *url.URL) (inbox vocab.ActivityStreamsOrderedCollectionPage, err error) {
return nil, nil
}
func (f *federatingDB) SetInbox(ctx context.Context, inbox vocab.ActivityStreamsOrderedCollectionPage) error {
return nil
}
func (f *federatingDB) Owns(ctx context.Context, id *url.URL) (owns bool, err error) {
return id.Host == f.config.Host, nil
}
func (f *federatingDB) ActorForOutbox(ctx context.Context, outboxIRI *url.URL) (actorIRI *url.URL, err error) {
return nil, nil
}
func (f *federatingDB) ActorForInbox(ctx context.Context, inboxIRI *url.URL) (actorIRI *url.URL, err error) {
return nil, nil
}
func (f *federatingDB) OutboxForInbox(ctx context.Context, inboxIRI *url.URL) (outboxIRI *url.URL, err error) {
return nil, nil
}
func (f *federatingDB) Exists(ctx context.Context, id *url.URL) (exists bool, err error) {
return false, nil
}
func (f *federatingDB) Get(ctx context.Context, id *url.URL) (value vocab.Type, err error) {
return nil, nil
}
func (f *federatingDB) Create(ctx context.Context, asType vocab.Type) error {
t, err := streams.NewTypeResolver()
if err != nil {
return err
}
if err := t.Resolve(ctx, asType); err != nil {
return err
}
asType.GetTypeName()
return nil
}
func (f *federatingDB) Update(ctx context.Context, asType vocab.Type) error {
return nil
}
func (f *federatingDB) Delete(ctx context.Context, id *url.URL) error {
return nil
}
func (f *federatingDB) GetOutbox(ctx context.Context, outboxIRI *url.URL) (inbox vocab.ActivityStreamsOrderedCollectionPage, err error) {
return nil, nil
}
func (f *federatingDB) SetOutbox(ctx context.Context, outbox vocab.ActivityStreamsOrderedCollectionPage) error {
return nil
}
func (f *federatingDB) NewID(ctx context.Context, t vocab.Type) (id *url.URL, err error) {
return nil, nil
}
func (f *federatingDB) Followers(ctx context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
return nil, nil
}
func (f *federatingDB) Following(ctx context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
return nil, nil
}
func (f *federatingDB) Liked(ctx context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
return nil, nil
}
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