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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/plus_addresses/plus_address_blocklist_data.h"
#include <string>
#include "base/metrics/histogram_functions.h"
#include "base/no_destructor.h"
#include "components/plus_addresses/blocked_facets.pb.h"
#include "third_party/re2/src/re2/re2.h"
namespace plus_addresses {
namespace {
constexpr char kUmaKeyParsingResult[] = "PlusAddresses.Blocklist.ParsingResult";
std::unique_ptr<re2::RE2> ConstructRegex(std::string pattern) {
if (pattern.empty()) {
return nullptr;
}
re2::RE2::Options options;
options.set_case_sensitive(false);
return std::make_unique<re2::RE2>(std::move(pattern), options);
}
} // namespace
// static
PlusAddressBlocklistData& PlusAddressBlocklistData::GetInstance() {
static base::NoDestructor<PlusAddressBlocklistData> instance;
return *instance;
}
PlusAddressBlocklistData::PlusAddressBlocklistData() = default;
PlusAddressBlocklistData::~PlusAddressBlocklistData() = default;
bool PlusAddressBlocklistData::PopulateDataFromComponent(
const std::string& binary_pb) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (binary_pb.empty()) {
base::UmaHistogramEnumeration(
kUmaKeyParsingResult,
PlusAddressBlocklistDataParsingResult::kEmptyResponse);
return false;
}
CompactPlusAddressBlockedFacets blocked_facets;
if (!blocked_facets.ParseFromString(binary_pb)) {
base::UmaHistogramEnumeration(
kUmaKeyParsingResult,
PlusAddressBlocklistDataParsingResult::kParsingError);
return false;
}
exclusion_pattern_ = ConstructRegex(blocked_facets.exclusion_pattern());
exception_pattern_ = ConstructRegex(blocked_facets.exception_pattern());
base::UmaHistogramEnumeration(
kUmaKeyParsingResult, PlusAddressBlocklistDataParsingResult::kSuccess);
return true;
}
const re2::RE2* PlusAddressBlocklistData::GetExclusionPattern() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return exclusion_pattern_.get();
}
const re2::RE2* PlusAddressBlocklistData::GetExceptionPattern() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return exception_pattern_.get();
}
} // namespace plus_addresses
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