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// Copyright (C) 2021 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.util;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableSet;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AttentionSetUpdate;
import com.google.gerrit.entities.ChangeMessage;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.AccountState;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Utility functions for text that can be persisted in data storage and should not contain user
* identifiable information, e.g. {@link ChangeMessage} or {@link AttentionSetUpdate#reason}.
*/
@Singleton
public class AccountTemplateUtil {
/**
* Template to represent account in pseudonymized form in text, that might be persisted in data
* storage.
*/
public static final String ACCOUNT_TEMPLATE = "<GERRIT_ACCOUNT_%d>";
public static final String ACCOUNT_TEMPLATE_REGEX = "<GERRIT_ACCOUNT_([0-9]+)>";
public static final Pattern ACCOUNT_TEMPLATE_PATTERN = Pattern.compile(ACCOUNT_TEMPLATE_REGEX);
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final AccountCache accountCache;
@Inject
AccountTemplateUtil(AccountCache accountCache) {
this.accountCache = accountCache;
}
/** Returns account ids that are used in text, that might contain {@link #ACCOUNT_TEMPLATE}. */
public static ImmutableSet<Account.Id> parseTemplates(String textTemplate) {
if (Strings.isNullOrEmpty(textTemplate)) {
return ImmutableSet.of();
}
Matcher matcher = ACCOUNT_TEMPLATE_PATTERN.matcher(textTemplate);
Set<Account.Id> accountsInTemplate = new HashSet<>();
while (matcher.find()) {
String accountId = matcher.group(1);
Optional<Account.Id> parsedAccountId = Account.Id.tryParse(accountId);
if (parsedAccountId.isPresent()) {
accountsInTemplate.add(parsedAccountId.get());
} else {
logger.atFine().log("Failed to parse accountId from template %s", matcher.group());
}
}
return ImmutableSet.copyOf(accountsInTemplate);
}
public static String getAccountTemplate(Account.Id accountId) {
return String.format(ACCOUNT_TEMPLATE, accountId.get());
}
/** Builds user-readable text from text, that might contain {@link #ACCOUNT_TEMPLATE}. */
public String replaceTemplates(String messageTemplate) {
Matcher matcher = ACCOUNT_TEMPLATE_PATTERN.matcher(messageTemplate);
StringBuffer out = new StringBuffer();
while (matcher.find()) {
String accountId = matcher.group(1);
String unrecognizedAccount = "Unrecognized Gerrit Account " + accountId;
Optional<Account.Id> parsedAccountId = Account.Id.tryParse(accountId);
if (parsedAccountId.isPresent()) {
Optional<AccountState> account = accountCache.get(parsedAccountId.get());
if (account.isPresent()) {
matcher.appendReplacement(out, account.get().account().getNameEmail(unrecognizedAccount));
continue;
}
}
matcher.appendReplacement(out, unrecognizedAccount);
}
matcher.appendTail(out);
return out.toString();
}
}
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