gotosocial/internal/federation/dereferencing/announce.go

127 lines
3.9 KiB
Go
Raw Normal View History

// 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 dereferencing
import (
"context"
"errors"
"net/url"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
)
// EnrichAnnounce enriches the given boost wrapper status
// by either fetching from the DB or dereferencing the target
// status, populating the boost wrapper's fields based on the
// target status, and then storing the wrapper in the database.
// The wrapper is then returned to the caller.
//
// The provided boost wrapper status must have BoostOfURI set.
func (d *Dereferencer) EnrichAnnounce(
ctx context.Context,
boost *gtsmodel.Status,
requestUser string,
) (*gtsmodel.Status, error) {
targetURI := boost.BoostOfURI
if targetURI == "" {
// We can't do anything.
return nil, gtserror.Newf("no URI to dereference")
}
// Parse the boost target status URI.
targetURIObj, err := url.Parse(targetURI)
if err != nil {
return nil, gtserror.Newf(
"couldn't parse boost target status URI %s: %w",
targetURI, err,
)
}
// Fetch/deref status being boosted.
var target *gtsmodel.Status
if targetURIObj.Host == config.GetHost() {
// This is a local status, fetch from the database
target, err = d.state.DB.GetStatusByURI(ctx, targetURI)
} else {
// This is a remote status, we need to dereference it.
//
// d.GetStatusByURI will handle domain block checking for us,
// so we don't try to deref an announce target on a blocked host.
target, _, err = d.GetStatusByURI(ctx, requestUser, targetURIObj)
}
if err != nil {
return nil, gtserror.Newf(
"error getting boost target status %s: %w",
targetURI, err,
)
}
// Generate an ID for the boost wrapper status.
boost.ID, err = id.NewULIDFromTime(boost.CreatedAt)
if err != nil {
return nil, gtserror.Newf("error generating id: %w", err)
}
// Populate remaining fields on
// the boost wrapper using target.
boost.Content = target.Content
boost.ContentWarning = target.ContentWarning
boost.ActivityStreamsType = target.ActivityStreamsType
boost.Sensitive = target.Sensitive
boost.Language = target.Language
boost.Text = target.Text
boost.BoostOfID = target.ID
boost.BoostOf = target
boost.BoostOfAccountID = target.AccountID
boost.BoostOfAccount = target.Account
boost.Visibility = target.Visibility
boost.Federated = target.Federated
boost.Boostable = target.Boostable
boost.Replyable = target.Replyable
boost.Likeable = target.Likeable
// Store the boost wrapper status.
switch err = d.state.DB.PutStatus(ctx, boost); {
case err == nil:
// All good baby.
case errors.Is(err, db.ErrAlreadyExists):
// DATA RACE! We likely lost out to another goroutine
// in a call to db.Put(Status). Look again in DB by URI.
boost, err = d.state.DB.GetStatusByURI(ctx, boost.URI)
if err != nil {
err = gtserror.Newf(
"error getting boost wrapper status %s from database after race: %w",
boost.URI, err,
)
}
default:
// Proper database error.
err = gtserror.Newf("db error inserting status: %w", err)
}
return boost, err
}