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// Copyright (C) 2023 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.restapi.account;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Table;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.common.Input;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.gpg.PublicKeyStoreUtil;
import com.google.gerrit.index.query.QueryParseException;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.GerritPersonIdent;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.StarredChangesUtil;
import com.google.gerrit.server.UserInitiated;
import com.google.gerrit.server.account.AccountException;
import com.google.gerrit.server.account.AccountResource;
import com.google.gerrit.server.account.AccountSshKey;
import com.google.gerrit.server.account.AccountsUpdate;
import com.google.gerrit.server.account.VersionedAuthorizedKeys;
import com.google.gerrit.server.change.AccountPatchReviewStore;
import com.google.gerrit.server.edit.ChangeEdit;
import com.google.gerrit.server.edit.ChangeEditUtil;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.plugincontext.PluginItemContext;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gerrit.server.ssh.SshKeyCache;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.List;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
/**
* REST endpoint for deleting an account.
*
* <p>This REST endpoint handles {@code DELETE /accounts/<account-identifier>} requests. Currently,
* only self deletions are allowed.
*/
@Singleton
public class DeleteAccount implements RestModifyView<AccountResource, Input> {
private final Provider<CurrentUser> self;
private final Provider<PersonIdent> serverIdent;
private final Provider<AccountsUpdate> accountsUpdateProvider;
private final VersionedAuthorizedKeys.Accessor authorizedKeys;
private final SshKeyCache sshKeyCache;
private final StarredChangesUtil starredChangesUtil;
private final DeleteDraftCommentsUtil deleteDraftCommentsUtil;
private final GitRepositoryManager gitManager;
private final Provider<InternalChangeQuery> queryProvider;
private final ChangeEditUtil changeEditUtil;
private final PluginItemContext<AccountPatchReviewStore> accountPatchReviewStore;
private final PublicKeyStoreUtil publicKeyStoreUtil;
@Inject
public DeleteAccount(
Provider<CurrentUser> self,
@GerritPersonIdent Provider<PersonIdent> serverIdent,
@UserInitiated Provider<AccountsUpdate> accountsUpdateProvider,
VersionedAuthorizedKeys.Accessor authorizedKeys,
SshKeyCache sshKeyCache,
StarredChangesUtil starredChangesUtil,
DeleteDraftCommentsUtil deleteDraftCommentsUtil,
GitRepositoryManager gitManager,
Provider<InternalChangeQuery> queryProvider,
ChangeEditUtil changeEditUtil,
PluginItemContext<AccountPatchReviewStore> accountPatchReviewStore,
PublicKeyStoreUtil publicKeyStoreUtil) {
this.self = self;
this.serverIdent = serverIdent;
this.accountsUpdateProvider = accountsUpdateProvider;
this.authorizedKeys = authorizedKeys;
this.sshKeyCache = sshKeyCache;
this.starredChangesUtil = starredChangesUtil;
this.deleteDraftCommentsUtil = deleteDraftCommentsUtil;
this.gitManager = gitManager;
this.queryProvider = queryProvider;
this.changeEditUtil = changeEditUtil;
this.accountPatchReviewStore = accountPatchReviewStore;
this.publicKeyStoreUtil = publicKeyStoreUtil;
}
@Override
@CanIgnoreReturnValue
public Response<?> apply(AccountResource rsrc, Input unusedInput)
throws AuthException, AccountException {
IdentifiedUser user = rsrc.getUser();
if (!self.get().hasSameAccountId(user)) {
throw new AuthException("Delete account is only permitted for self");
}
Account.Id userId = user.getAccountId();
try {
deletePgpKeys(user);
deleteSshKeys(user);
deleteStarredChanges(userId);
deleteChangeEdits(userId);
deleteDraftCommentsUtil.deleteDraftComments(user, null);
accountPatchReviewStore.run(a -> a.clearReviewedBy(userId));
accountsUpdateProvider
.get()
.delete("Deleting user through `DELETE /accounts/{ID}`", user.getAccountId());
} catch (Exception e) {
throw new AccountException("Could not delete account", e);
}
return Response.none();
}
private void deletePgpKeys(IdentifiedUser user) {
if (!publicKeyStoreUtil.hasInitializedPublicKeyStore()) {
return;
}
try {
List<RefUpdate.Result> deletedKeyResults =
publicKeyStoreUtil.deleteAllPgpKeysForUser(
user.getAccountId(), serverIdent.get(), serverIdent.get());
for (RefUpdate.Result saveResult : deletedKeyResults) {
if (saveResult != RefUpdate.Result.NO_CHANGE
&& saveResult != RefUpdate.Result.FAST_FORWARD) {
throw new StorageException(String.format("Failed to delete PGP key: %s", saveResult));
}
}
} catch (Exception e) {
throw new StorageException("Failed to delete PGP keys.", e);
}
}
private void deleteSshKeys(IdentifiedUser user) throws ConfigInvalidException, IOException {
List<AccountSshKey> keys = authorizedKeys.getKeys(user.getAccountId());
for (AccountSshKey key : keys) {
authorizedKeys.deleteKey(user.getAccountId(), key.seq());
}
user.getUserName().ifPresent(sshKeyCache::evict);
}
private void deleteStarredChanges(Account.Id accountId) {
ImmutableSet<Change.Id> staredChanges = starredChangesUtil.byAccountId(accountId, false);
for (Change.Id change : staredChanges) {
starredChangesUtil.unstar(self.get().getAccountId(), change);
}
}
private void deleteChangeEdits(Account.Id accountId) throws IOException, QueryParseException {
// Note: in case of a stale index, the results of this query might be incomplete.
List<ChangeData> changesWithEdits = queryProvider.get().byOpenEditByUser(accountId);
for (ChangeData cd : changesWithEdits) {
for (Table.Cell<Account.Id, PatchSet.Id, Ref> edit : cd.editRefs().cellSet()) {
if (!accountId.equals(edit.getRowKey())) {
continue;
}
try (Repository repo = gitManager.openRepository(cd.project());
RevWalk rw = new RevWalk(repo)) {
RevCommit commit = rw.parseCommit(edit.getValue().getObjectId());
changeEditUtil.delete(
new ChangeEdit(
cd.change(),
edit.getValue().getName(),
commit,
cd.patchSet(edit.getColumnKey())));
}
}
}
}
}
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