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// Copyright (C) 2009 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.account;
import static com.google.gerrit.server.account.externalids.ExternalId.SCHEME_MAILTO;
import static com.google.gerrit.server.account.externalids.ExternalId.SCHEME_USERNAME;
import com.google.common.base.Function;
import com.google.common.base.Strings;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.server.CurrentUser.PropertyKey;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.WatchConfig.NotifyType;
import com.google.gerrit.server.account.WatchConfig.ProjectWatchKey;
import com.google.gerrit.server.account.externalids.ExternalId;
import com.google.gerrit.server.config.AllUsersName;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.apache.commons.codec.DecoderException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AccountState {
private static final Logger logger = LoggerFactory.getLogger(AccountState.class);
public static final Function<AccountState, Account.Id> ACCOUNT_ID_FUNCTION =
a -> a.getAccount().getId();
private final AllUsersName allUsersName;
private final Account account;
private final Collection<ExternalId> externalIds;
private final Map<ProjectWatchKey, Set<NotifyType>> projectWatches;
private Cache<IdentifiedUser.PropertyKey<Object>, Object> properties;
public AccountState(
AllUsersName allUsersName,
Account account,
Collection<ExternalId> externalIds,
Map<ProjectWatchKey, Set<NotifyType>> projectWatches) {
this.allUsersName = allUsersName;
this.account = account;
this.externalIds = externalIds;
this.projectWatches = projectWatches;
this.account.setUserName(getUserName(externalIds));
}
public AllUsersName getAllUsersNameForIndexing() {
return allUsersName;
}
/** Get the cached account metadata. */
public Account getAccount() {
return account;
}
/**
* Get the username, if one has been declared for this user.
*
* <p>The username is the {@link ExternalId} using the scheme {@link ExternalId#SCHEME_USERNAME}.
*/
public String getUserName() {
return account.getUserName();
}
public boolean checkPassword(String password, String username) {
if (password == null) {
return false;
}
for (ExternalId id : getExternalIds()) {
// Only process the "username:$USER" entry, which is unique.
if (!id.isScheme(SCHEME_USERNAME) || !username.equals(id.key().id())) {
continue;
}
String hashedStr = id.password();
if (!Strings.isNullOrEmpty(hashedStr)) {
try {
return HashedPassword.decode(hashedStr).checkPassword(password);
} catch (DecoderException e) {
logger.error("DecoderException for user {}: {}", username, e.getMessage());
return false;
}
}
}
return false;
}
/** The external identities that identify the account holder. */
public Collection<ExternalId> getExternalIds() {
return externalIds;
}
/** The project watches of the account. */
public Map<ProjectWatchKey, Set<NotifyType>> getProjectWatches() {
return projectWatches;
}
public static String getUserName(Collection<ExternalId> ids) {
for (ExternalId extId : ids) {
if (extId.isScheme(SCHEME_USERNAME)) {
return extId.key().id();
}
}
return null;
}
public static Set<String> getEmails(Collection<ExternalId> ids) {
Set<String> emails = new HashSet<>();
for (ExternalId extId : ids) {
if (extId.isScheme(SCHEME_MAILTO)) {
emails.add(extId.key().id());
}
}
return emails;
}
/**
* Lookup a previously stored property.
*
* <p>All properties are automatically cleared when the account cache invalidates the {@code
* AccountState}. This method is thread-safe.
*
* @param key unique property key.
* @return previously stored value, or {@code null}.
*/
@Nullable
public <T> T get(PropertyKey<T> key) {
Cache<PropertyKey<Object>, Object> p = properties(false);
if (p != null) {
@SuppressWarnings("unchecked")
T value = (T) p.getIfPresent(key);
return value;
}
return null;
}
/**
* Store a property for later retrieval.
*
* <p>This method is thread-safe.
*
* @param key unique property key.
* @param value value to store; or {@code null} to clear the value.
*/
public <T> void put(PropertyKey<T> key, @Nullable T value) {
Cache<PropertyKey<Object>, Object> p = properties(value != null);
if (p != null) {
@SuppressWarnings("unchecked")
PropertyKey<Object> k = (PropertyKey<Object>) key;
if (value != null) {
p.put(k, value);
} else {
p.invalidate(k);
}
}
}
private synchronized Cache<PropertyKey<Object>, Object> properties(boolean allocate) {
if (properties == null && allocate) {
properties =
CacheBuilder.newBuilder()
.concurrencyLevel(1)
.initialCapacity(16)
// Use weakKeys to ensure plugins that garbage collect will also
// eventually release data held in any still live AccountState.
.weakKeys()
.build();
}
return properties;
}
}
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