gotosocial/internal/processing/account/move.go

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// 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 account
import (
"context"
"errors"
"fmt"
"net/url"
"slices"
"time"
"github.com/superseriousbusiness/gotosocial/internal/ap"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/messages"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
"github.com/superseriousbusiness/gotosocial/internal/uris"
"golang.org/x/crypto/bcrypt"
)
func (p *Processor) MoveSelf(
ctx context.Context,
authed *oauth.Auth,
form *apimodel.AccountMoveRequest,
) gtserror.WithCode {
// Ensure valid MovedToURI.
if form.MovedToURI == "" {
err := errors.New("no moved_to_uri provided in account Move request")
return gtserror.NewErrorBadRequest(err, err.Error())
}
targetAcctURIStr := form.MovedToURI
targetAcctURI, err := url.Parse(form.MovedToURI)
if err != nil {
err := fmt.Errorf("invalid moved_to_uri provided in account Move request: %w", err)
return gtserror.NewErrorBadRequest(err, err.Error())
}
if targetAcctURI.Scheme != "https" && targetAcctURI.Scheme != "http" {
err := errors.New("invalid moved_to_uri provided in account Move request: uri scheme must be http or https")
return gtserror.NewErrorBadRequest(err, err.Error())
}
// Self account Move requires password to ensure it's for real.
if form.Password == "" {
err := errors.New("no password provided in account Move request")
return gtserror.NewErrorBadRequest(err, err.Error())
}
if err := bcrypt.CompareHashAndPassword(
[]byte(authed.User.EncryptedPassword),
[]byte(form.Password),
); err != nil {
err := errors.New("invalid password provided in account Move request")
return gtserror.NewErrorBadRequest(err, err.Error())
}
// We can't/won't validate Move activities
// to domains we have blocked, so check this.
targetDomainBlocked, err := p.state.DB.IsDomainBlocked(ctx, targetAcctURI.Host)
if err != nil {
err := fmt.Errorf(
"db error checking if target domain %s blocked: %w",
targetAcctURI.Host, err,
)
return gtserror.NewErrorInternalError(err)
}
if targetDomainBlocked {
err := fmt.Errorf(
"domain of %s is blocked from this instance; "+
"you will not be able to Move to that account",
targetAcctURIStr,
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
var (
// Current account from which
// the move is taking place.
originAcct = authed.Account
// Target account to which
// the move is taking place.
targetAcct *gtsmodel.Account
// AP representation of target.
targetAcctable ap.Accountable
)
// Next steps involve checking + setting
// state that might get messed up if a
// client triggers this function twice
// in quick succession, so get a lock on
// this account.
lockKey := originAcct.URI
unlock := p.state.ClientLocks.Lock(lockKey)
defer unlock()
// Ensure we have a valid, up-to-date representation of the target account.
targetAcct, targetAcctable, err = p.federator.GetAccountByURI(
ctx,
originAcct.Username,
targetAcctURI,
)
if err != nil {
err := fmt.Errorf("error dereferencing moved_to_uri account: %w", err)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
if !targetAcct.SuspendedAt.IsZero() {
err := fmt.Errorf(
"target account %s is suspended from this instance; "+
"you will not be able to Move to that account",
targetAcct.URI,
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
if targetAcct.IsRemote() {
// Force refresh Move target account
// to ensure we have up-to-date version.
targetAcct, _, err = p.federator.RefreshAccount(ctx,
originAcct.Username,
targetAcct,
targetAcctable,
dereferencing.Freshest,
)
if err != nil {
err := fmt.Errorf(
"error refreshing target account %s: %w",
targetAcctURIStr, err,
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
}
// Target account MUST be aliased to this
// account for this to be a valid Move.
if !slices.Contains(targetAcct.AlsoKnownAsURIs, originAcct.URI) {
err := fmt.Errorf(
"target account %s is not aliased to this account via alsoKnownAs; "+
"if you just changed it, please wait a few minutes and try the Move again",
targetAcct.URI,
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
// Target account cannot itself have
// already Moved somewhere else.
if targetAcct.MovedToURI != "" {
err := fmt.Errorf(
"target account %s has already Moved somewhere else (%s); "+
"you will not be able to Move to that account",
targetAcct.URI, targetAcct.MovedToURI,
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
// If a Move has been *attempted* within last 5m,
// that involved the origin and target in any way,
// then we shouldn't try to reprocess immediately.
latestMoveAttempt, err := p.state.DB.GetLatestMoveAttemptInvolvingURIs(
ctx, originAcct.URI, targetAcct.URI,
)
if err != nil {
err := fmt.Errorf(
"error checking latest Move attempt involving origin %s and target %s: %w",
originAcct.URI, targetAcct.URI, err,
)
return gtserror.NewErrorInternalError(err)
}
if !latestMoveAttempt.IsZero() &&
time.Since(latestMoveAttempt) < 5*time.Minute {
err := fmt.Errorf(
"your account or target account have been involved in a Move attempt within "+
"the last 5 minutes, will not process Move; please try again after %s",
latestMoveAttempt.Add(5*time.Minute),
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
// If a Move has *succeeded* within the last week
// that involved the origin and target in any way,
// then we shouldn't process again for a while.
latestMoveSuccess, err := p.state.DB.GetLatestMoveSuccessInvolvingURIs(
ctx, originAcct.URI, targetAcct.URI,
)
if err != nil {
err := fmt.Errorf(
"error checking latest Move success involving origin %s and target %s: %w",
originAcct.URI, targetAcct.URI, err,
)
return gtserror.NewErrorInternalError(err)
}
if !latestMoveSuccess.IsZero() &&
time.Since(latestMoveSuccess) < 168*time.Hour {
err := fmt.Errorf(
"your account or target account have been involved in a successful Move within "+
"the last 7 days, will not process Move; please try again after %s",
latestMoveSuccess.Add(168*time.Hour),
)
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
// See if we have a Move stored already
// or if we need to create a new one.
var move *gtsmodel.Move
if originAcct.MoveID != "" {
// Move already stored, ensure it's
// to the target and nothing weird is
// happening with race conditions etc.
move = originAcct.Move
if move == nil {
// This shouldn't happen...
err := fmt.Errorf("nil move for id %s", originAcct.MoveID)
return gtserror.NewErrorInternalError(err)
}
if move.OriginURI != originAcct.URI ||
move.TargetURI != targetAcct.URI {
// This is also weird...
err := errors.New("a Move is already stored for your account but contains invalid fields")
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
if originAcct.MovedToURI != move.TargetURI {
// Huh... I'll be damned.
err := errors.New("stored Move target URI does not equal your moved_to_uri value")
return gtserror.NewErrorUnprocessableEntity(err, err.Error())
}
} else {
// Move not stored yet, create it.
moveID := id.NewULID()
moveURIStr := uris.GenerateURIForMove(originAcct.Username, moveID)
// We might have selected the target
// using the URL and not the URI.
// Ensure we continue with the URI!
if targetAcctURIStr != targetAcct.URI {
targetAcctURIStr = targetAcct.URI
targetAcctURI, err = url.Parse(targetAcctURIStr)
if err != nil {
return gtserror.NewErrorInternalError(err)
}
}
// Parse origin URI.
originAcctURI, err := url.Parse(originAcct.URI)
if err != nil {
return gtserror.NewErrorInternalError(err)
}
// Store the Move.
move = &gtsmodel.Move{
ID: moveID,
AttemptedAt: time.Now(),
OriginURI: originAcct.URI,
Origin: originAcctURI,
TargetURI: targetAcctURIStr,
Target: targetAcctURI,
URI: moveURIStr,
}
if err := p.state.DB.PutMove(ctx, move); err != nil {
err := fmt.Errorf("db error storing move %s: %w", moveURIStr, err)
return gtserror.NewErrorInternalError(err)
}
// Update account with the new
// Move, and set moved_to_uri.
originAcct.MoveID = move.ID
originAcct.Move = move
originAcct.MovedToURI = targetAcct.URI
originAcct.MovedTo = targetAcct
if err := p.state.DB.UpdateAccount(
ctx,
originAcct,
"move_id",
"moved_to_uri",
); err != nil {
err := fmt.Errorf("db error updating account: %w", err)
return gtserror.NewErrorInternalError(err)
}
}
// Everything seems OK, process Move side effects async.
p.state.Workers.EnqueueClientAPI(ctx, messages.FromClientAPI{
APObjectType: ap.ActorPerson,
APActivityType: ap.ActivityMove,
GTSModel: move,
OriginAccount: originAcct,
TargetAccount: targetAcct,
})
return nil
}