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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 dereferencing
import (
"context"
"fmt"
"net/url"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
func (d *deref) GetRemoteAttachment(ctx context.Context, requestingUsername string, minAttachment *gtsmodel.MediaAttachment) (*gtsmodel.MediaAttachment, error) {
if minAttachment.RemoteURL == "" {
return nil, fmt.Errorf("GetRemoteAttachment: minAttachment remote URL was empty")
}
remoteAttachmentURL := minAttachment.RemoteURL
l := logrus.WithFields(logrus.Fields{
"username": requestingUsername,
"remoteAttachmentURL": remoteAttachmentURL,
})
// return early if we already have the attachment somewhere
maybeAttachment := >smodel.MediaAttachment{}
where := []db.Where{
{
Key: "remote_url",
Value: remoteAttachmentURL,
},
}
if err := d.db.GetWhere(ctx, where, maybeAttachment); err == nil {
// we already the attachment in the database
l.Debugf("GetRemoteAttachment: attachment already exists with id %s", maybeAttachment.ID)
return maybeAttachment, nil
}
a, err := d.RefreshAttachment(ctx, requestingUsername, minAttachment)
if err != nil {
return nil, fmt.Errorf("GetRemoteAttachment: error refreshing attachment: %s", err)
}
if err := d.db.Put(ctx, a); err != nil {
if err != db.ErrAlreadyExists {
return nil, fmt.Errorf("GetRemoteAttachment: error inserting attachment: %s", err)
}
}
return a, nil
}
func (d *deref) RefreshAttachment(ctx context.Context, requestingUsername string, minAttachment *gtsmodel.MediaAttachment) (*gtsmodel.MediaAttachment, error) {
// it just doesn't exist or we have to refresh
if minAttachment.AccountID == "" {
return nil, fmt.Errorf("RefreshAttachment: minAttachment account ID was empty")
}
if minAttachment.File.ContentType == "" {
return nil, fmt.Errorf("RefreshAttachment: minAttachment.file.contentType was empty")
}
t, err := d.transportController.NewTransportForUsername(ctx, requestingUsername)
if err != nil {
return nil, fmt.Errorf("RefreshAttachment: error creating transport: %s", err)
}
derefURI, err := url.Parse(minAttachment.RemoteURL)
if err != nil {
return nil, err
}
attachmentBytes, err := t.DereferenceMedia(ctx, derefURI, minAttachment.File.ContentType)
if err != nil {
return nil, fmt.Errorf("RefreshAttachment: error dereferencing media: %s", err)
}
a, err := d.mediaHandler.ProcessAttachment(ctx, attachmentBytes, minAttachment)
if err != nil {
return nil, fmt.Errorf("RefreshAttachment: error processing attachment: %s", err)
}
return a, nil
}
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