gotosocial/internal/processing/account/delete.go

551 lines
18 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 account
import (
"context"
"errors"
"net"
"time"
"codeberg.org/gruf/go-kv"
"github.com/google/uuid"
"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/messages"
"github.com/superseriousbusiness/gotosocial/internal/util"
"golang.org/x/crypto/bcrypt"
)
const deleteSelectLimit = 50
// Delete deletes an account, and all of that account's statuses, media, follows, notifications, etc etc etc.
// The origin passed here should be either the ID of the account doing the delete (can be itself), or the ID of a domain block.
func (p *Processor) Delete(ctx context.Context, account *gtsmodel.Account, origin string) gtserror.WithCode {
l := log.WithContext(ctx).WithFields(kv.Fields{
{"username", account.Username},
{"domain", account.Domain},
}...)
l.Trace("beginning account delete process")
if err := p.deleteAccountFollows(ctx, account); err != nil {
return gtserror.NewErrorInternalError(err)
}
if err := p.deleteAccountBlocks(ctx, account); err != nil {
return gtserror.NewErrorInternalError(err)
}
if err := p.deleteAccountStatuses(ctx, account); err != nil {
return gtserror.NewErrorInternalError(err)
}
if err := p.deleteAccountNotifications(ctx, account); err != nil {
return gtserror.NewErrorInternalError(err)
}
if err := p.deleteAccountPeripheral(ctx, account); err != nil {
return gtserror.NewErrorInternalError(err)
}
if account.IsLocal() {
// we tokens, applications and clients for account as one of the last
// stages during deletion, as other database models rely on these.
if err := p.deleteUserAndTokensForAccount(ctx, account); err != nil {
return gtserror.NewErrorInternalError(err)
}
}
// To prevent the account being created again,
// stubbify it and update it in the db.
// The account will not be deleted, but it
// will become completely unusable.
columns := stubbifyAccount(account, origin)
if err := p.state.DB.UpdateAccount(ctx, account, columns...); err != nil {
return gtserror.NewErrorInternalError(err)
}
l.Info("account deleted")
return nil
}
// DeleteSelf is like Delete, but specifically for local accounts deleting themselves.
//
// Calling DeleteSelf results in a delete message being enqueued in the processor,
// which causes side effects to occur: delete will be federated out to other instances,
// and the above Delete function will be called afterwards from the processor, to clear
// out the account's bits and bobs, and stubbify it.
func (p *Processor) DeleteSelf(ctx context.Context, account *gtsmodel.Account) gtserror.WithCode {
fromClientAPIMessage := messages.FromClientAPI{
APObjectType: ap.ActorPerson,
APActivityType: ap.ActivityDelete,
OriginAccount: account,
TargetAccount: account,
}
// Process the delete side effects asynchronously.
p.state.Workers.EnqueueClientAPI(ctx, fromClientAPIMessage)
return nil
}
// deleteUserAndTokensForAccount deletes the gtsmodel.User and
// any OAuth tokens and applications for the given account.
//
// Callers to this function should already have checked that
// this is a local account, or else it won't have a user associated
// with it, and this will fail.
func (p *Processor) deleteUserAndTokensForAccount(ctx context.Context, account *gtsmodel.Account) error {
user, err := p.state.DB.GetUserByAccountID(ctx, account.ID)
if err != nil {
return gtserror.Newf("db error getting user: %w", err)
}
tokens := []*gtsmodel.Token{}
if err := p.state.DB.GetWhere(ctx, []db.Where{{Key: "user_id", Value: user.ID}}, &tokens); err != nil {
return gtserror.Newf("db error getting tokens: %w", err)
}
for _, t := range tokens {
// Delete any OAuth clients associated with this token.
if err := p.state.DB.DeleteByID(ctx, t.ClientID, &[]*gtsmodel.Client{}); err != nil {
return gtserror.Newf("db error deleting client: %w", err)
}
// Delete any OAuth applications associated with this token.
if err := p.state.DB.DeleteApplicationByClientID(ctx, t.ClientID); err != nil {
return gtserror.Newf("db error deleting application: %w", err)
}
// Delete the token itself.
if err := p.state.DB.DeleteByID(ctx, t.ID, t); err != nil {
return gtserror.Newf("db error deleting token: %w", err)
}
}
columns, err := stubbifyUser(user)
if err != nil {
return gtserror.Newf("error stubbifying user: %w", err)
}
if err := p.state.DB.UpdateUser(ctx, user, columns...); err != nil {
return gtserror.Newf("db error updating user: %w", err)
}
return nil
}
// deleteAccountFollows deletes:
// - Follows targeting account.
// - Follow requests targeting account.
// - Follows created by account.
// - Follow requests created by account.
func (p *Processor) deleteAccountFollows(ctx context.Context, account *gtsmodel.Account) error {
// Delete follows targeting this account.
followedBy, err := p.state.DB.GetAccountFollowers(ctx, account.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("db error getting follows targeting account %s: %w", account.ID, err)
}
for _, follow := range followedBy {
if err := p.state.DB.DeleteFollowByID(ctx, follow.ID); err != nil {
return gtserror.Newf("db error unfollowing account followedBy: %w", err)
}
}
// Delete follow requests targeting this account.
followRequestedBy, err := p.state.DB.GetAccountFollowRequests(ctx, account.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("db error getting follow requests targeting account %s: %w", account.ID, err)
}
for _, followRequest := range followRequestedBy {
if err := p.state.DB.DeleteFollowRequestByID(ctx, followRequest.ID); err != nil {
return gtserror.Newf("db error unfollowing account followRequestedBy: %w", err)
}
}
var (
// Use this slice to batch unfollow messages.
msgs = []messages.FromClientAPI{}
// To avoid checking if account is local over + over
// inside the subsequent loops, just generate static
// side effects function once now.
unfollowSideEffects = p.unfollowSideEffectsFunc(account)
)
// Delete follows originating from this account.
following, err := p.state.DB.GetAccountFollows(ctx, account.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("db error getting follows owned by account %s: %w", account.ID, err)
}
// For each follow owned by this account, unfollow
// and process side effects (noop if remote account).
for _, follow := range following {
if err := p.state.DB.DeleteFollowByID(ctx, follow.ID); err != nil {
return gtserror.Newf("db error unfollowing account: %w", err)
}
if msg := unfollowSideEffects(ctx, account, follow); msg != nil {
// There was a side effect to process.
msgs = append(msgs, *msg)
}
}
// Delete follow requests originating from this account.
followRequesting, err := p.state.DB.GetAccountFollowRequesting(ctx, account.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("db error getting follow requests owned by account %s: %w", account.ID, err)
}
// For each follow owned by this account, unfollow
// and process side effects (noop if remote account).
for _, followRequest := range followRequesting {
if err := p.state.DB.DeleteFollowRequestByID(ctx, followRequest.ID); err != nil {
return gtserror.Newf("db error unfollowingRequesting account: %w", err)
}
// Dummy out a follow so our side effects func
// has something to work with. This follow will
// never enter the db, it's just for convenience.
follow := &gtsmodel.Follow{
URI: followRequest.URI,
AccountID: followRequest.AccountID,
Account: followRequest.Account,
TargetAccountID: followRequest.TargetAccountID,
TargetAccount: followRequest.TargetAccount,
}
if msg := unfollowSideEffects(ctx, account, follow); msg != nil {
// There was a side effect to process.
msgs = append(msgs, *msg)
}
}
// Process accreted messages asynchronously.
p.state.Workers.EnqueueClientAPI(ctx, msgs...)
return nil
}
func (p *Processor) unfollowSideEffectsFunc(deletedAccount *gtsmodel.Account) func(ctx context.Context, account *gtsmodel.Account, follow *gtsmodel.Follow) *messages.FromClientAPI {
if !deletedAccount.IsLocal() {
// Don't try to process side effects
// for accounts that aren't local.
return func(ctx context.Context, account *gtsmodel.Account, follow *gtsmodel.Follow) *messages.FromClientAPI {
return nil // noop
}
}
return func(ctx context.Context, account *gtsmodel.Account, follow *gtsmodel.Follow) *messages.FromClientAPI {
if follow.TargetAccount == nil {
// TargetAccount seems to have gone;
// race condition? db corruption?
log.WithContext(ctx).WithField("follow", follow).Warn("follow had no TargetAccount, likely race condition")
return nil
}
if follow.TargetAccount.IsLocal() {
// No side effects for local unfollows.
return nil
}
// There was a follow, process side effects.
return &messages.FromClientAPI{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityUndo,
GTSModel: follow,
OriginAccount: account,
TargetAccount: follow.TargetAccount,
}
}
}
func (p *Processor) deleteAccountBlocks(ctx context.Context, account *gtsmodel.Account) error {
if err := p.state.DB.DeleteAccountBlocks(ctx, account.ID); err != nil {
return gtserror.Newf("db error deleting account blocks for %s: %w", account.ID, err)
}
return nil
}
// deleteAccountStatuses iterates through all statuses owned by
// the given account, passing each discovered status (and boosts
// thereof) to the processor workers for further async processing.
func (p *Processor) deleteAccountStatuses(ctx context.Context, account *gtsmodel.Account) error {
// We'll select statuses 50 at a time so we don't wreck the db,
// and pass them through to the client api worker to handle.
//
// Deleting the statuses in this way also handles deleting the
// account's media attachments, mentions, and polls, since these
// are all attached to statuses.
var (
statuses []*gtsmodel.Status
err error
maxID string
msgs = []messages.FromClientAPI{}
)
statusLoop:
for {
// Page through account's statuses.
statuses, err = p.state.DB.GetAccountStatuses(
ctx,
account.ID,
deleteSelectLimit,
false,
false,
maxID,
"",
false,
false,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
// Make sure we don't have a real error.
return err
}
if len(statuses) == 0 {
break statusLoop
}
// Update next maxID from last status.
maxID = statuses[len(statuses)-1].ID
for _, status := range statuses {
status.Account = account // ensure account is set
// Pass the status delete through the client api worker for processing.
msgs = append(msgs, messages.FromClientAPI{
APObjectType: ap.ObjectNote,
APActivityType: ap.ActivityDelete,
GTSModel: status,
OriginAccount: account,
TargetAccount: account,
})
// Look for any boosts of this status in DB.
boosts, err := p.state.DB.GetStatusBoosts(ctx, status.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return gtserror.Newf("error fetching status reblogs for %s: %w", status.ID, err)
}
for _, boost := range boosts {
if boost.Account == nil {
// Fetch the relevant account for this status boost.
boostAcc, err := p.state.DB.GetAccountByID(ctx, boost.AccountID)
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// We don't have an account for this boost
// for some reason, so just skip processing.
log.WithContext(ctx).WithField("boost", boost).Warnf("no account found with id %s for boost %s", boost.AccountID, boost.ID)
continue
}
return gtserror.Newf("error fetching boosted status account for %s: %w", boost.AccountID, err)
}
// Set account model
boost.Account = boostAcc
}
// Pass the boost delete through the client api worker for processing.
msgs = append(msgs, messages.FromClientAPI{
APObjectType: ap.ActivityAnnounce,
APActivityType: ap.ActivityUndo,
GTSModel: status,
OriginAccount: boost.Account,
TargetAccount: account,
})
}
}
}
// Batch process all accreted messages.
p.state.Workers.EnqueueClientAPI(ctx, msgs...)
return nil
}
func (p *Processor) deleteAccountNotifications(ctx context.Context, account *gtsmodel.Account) error {
// Delete all notifications of all types targeting given account.
if err := p.state.DB.DeleteNotifications(ctx, nil, account.ID, ""); err != nil && !errors.Is(err, db.ErrNoEntries) {
return err
}
// Delete all notifications of all types originating from given account.
if err := p.state.DB.DeleteNotifications(ctx, nil, "", account.ID); err != nil && !errors.Is(err, db.ErrNoEntries) {
return err
}
return nil
}
func (p *Processor) deleteAccountPeripheral(ctx context.Context, account *gtsmodel.Account) error {
// Delete all bookmarks owned by given account.
if err := p.state.DB.DeleteStatusBookmarks(ctx, account.ID, ""); // nocollapse
err != nil && !errors.Is(err, db.ErrNoEntries) {
return err
}
// Delete all bookmarks targeting given account.
if err := p.state.DB.DeleteStatusBookmarks(ctx, "", account.ID); // nocollapse
err != nil && !errors.Is(err, db.ErrNoEntries) {
return err
}
// Delete all faves owned by given account.
if err := p.state.DB.DeleteStatusFaves(ctx, account.ID, ""); // nocollapse
err != nil && !errors.Is(err, db.ErrNoEntries) {
return err
}
// Delete all faves targeting given account.
if err := p.state.DB.DeleteStatusFaves(ctx, "", account.ID); // nocollapse
err != nil && !errors.Is(err, db.ErrNoEntries) {
return err
}
// TODO: add status mutes here when they're implemented.
return nil
}
// stubbifyAccount renders the given account as a stub,
// removing most information from it and marking it as
// suspended.
//
// The origin parameter refers to the origin of the
// suspension action; should be an account ID or domain
// block ID.
//
// For caller's convenience, this function returns the db
// names of all columns that are updated by it.
func stubbifyAccount(account *gtsmodel.Account, origin string) []string {
var (
now = time.Now()
never = time.Time{}
)
account.FetchedAt = never
account.AvatarMediaAttachmentID = ""
account.AvatarRemoteURL = ""
account.HeaderMediaAttachmentID = ""
account.HeaderRemoteURL = ""
account.DisplayName = ""
account.EmojiIDs = nil
account.Emojis = nil
account.Fields = nil
account.Note = ""
account.NoteRaw = ""
account.Memorial = util.Ptr(false)
account.AlsoKnownAs = ""
account.MovedToAccountID = ""
account.Reason = ""
account.Discoverable = util.Ptr(false)
account.StatusContentType = ""
account.CustomCSS = ""
account.SuspendedAt = now
account.SuspensionOrigin = origin
account.HideCollections = util.Ptr(true)
account.EnableRSS = util.Ptr(false)
return []string{
"fetched_at",
"avatar_media_attachment_id",
"avatar_remote_url",
"header_media_attachment_id",
"header_remote_url",
"display_name",
"emojis",
"fields",
"note",
"note_raw",
"memorial",
"also_known_as",
"moved_to_account_id",
"reason",
"discoverable",
"status_content_type",
"custom_css",
"suspended_at",
"suspension_origin",
"hide_collections",
"enable_rss",
}
}
// stubbifyUser renders the given user as a stub,
// removing sensitive information like IP addresses
// and sign-in times, but keeping email addresses to
// prevent the same email address from creating another
// account on this instance.
//
// `encrypted_password` is set to the bcrypt hash of a
// random uuid, so if the action is reversed, the user
// will have to reset their password via email.
//
// For caller's convenience, this function returns the db
// names of all columns that are updated by it.
func stubbifyUser(user *gtsmodel.User) ([]string, error) {
uuid, err := uuid.New().MarshalBinary()
if err != nil {
return nil, err
}
dummyPassword, err := bcrypt.GenerateFromPassword(uuid, bcrypt.DefaultCost)
if err != nil {
return nil, err
}
never := time.Time{}
user.EncryptedPassword = string(dummyPassword)
user.SignUpIP = net.IPv4zero
user.CurrentSignInAt = never
user.CurrentSignInIP = net.IPv4zero
user.LastSignInAt = never
user.LastSignInIP = net.IPv4zero
user.SignInCount = 1
user.Locale = ""
user.CreatedByApplicationID = ""
user.LastEmailedAt = never
user.ConfirmationToken = ""
user.ConfirmationSentAt = never
user.ResetPasswordToken = ""
user.ResetPasswordSentAt = never
return []string{
"encrypted_password",
"sign_up_ip",
"current_sign_in_at",
"current_sign_in_ip",
"last_sign_in_at",
"last_sign_in_ip",
"sign_in_count",
"locale",
"created_by_application_id",
"last_emailed_at",
"confirmation_token",
"confirmation_sent_at",
"reset_password_token",
"reset_password_sent_at",
}, nil
}