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// Copyright 2022 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/commerce/core/heuristics/commerce_heuristics_provider.h"
#include <set>
#include "base/feature_list.h"
#include "base/json/json_reader.h"
#include "base/metrics/field_trial_params.h"
#include "base/no_destructor.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "build/buildflag.h"
#include "components/commerce/core/commerce_feature_list.h"
#include "components/commerce/core/commerce_heuristics_data.h"
#include "components/commerce/core/commerce_heuristics_data_metrics_helper.h"
#include "components/grit/components_resources.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "third_party/re2/src/re2/re2.h"
#include "ui/base/resource/resource_bundle.h"
namespace commerce_heuristics {
namespace {
constexpr unsigned kLengthLimit = 4096;
std::string eTLDPlusOne(const GURL& url) {
return net::registry_controlled_domains::GetDomainAndRegistry(
url, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
}
const std::map<std::string, std::string>& GetCartPatternMapping() {
static base::NoDestructor<std::map<std::string, std::string>> pattern_map([] {
base::Value json(base::JSONReader::Read(
commerce::kCartPatternMapping.Get().empty()
? ui::ResourceBundle::GetSharedInstance()
.LoadDataResourceString(
IDR_CART_DOMAIN_CART_URL_REGEX_JSON)
: commerce::kCartPatternMapping.Get())
.value());
DCHECK(json.is_dict());
std::map<std::string, std::string> map;
for (auto&& item : json.GetDict()) {
map.insert({std::move(item.first), std::move(item.second).TakeString()});
}
return map;
}());
return *pattern_map;
}
const std::map<std::string, std::string>& GetCheckoutPatternMapping() {
static base::NoDestructor<std::map<std::string, std::string>> pattern_map([] {
base::Value json(
base::JSONReader::Read(
commerce::kCheckoutPatternMapping.Get().empty()
? ui::ResourceBundle::GetSharedInstance()
.LoadDataResourceString(
IDR_CHECKOUT_URL_REGEX_DOMAIN_MAPPING_JSON)
: commerce::kCheckoutPatternMapping.Get())
.value());
DCHECK(json.is_dict());
std::map<std::string, std::string> map;
for (auto&& item : json.GetDict()) {
map.insert({std::move(item.first), std::move(item.second).TakeString()});
}
return map;
}());
return *pattern_map;
}
const re2::RE2* GetVisitCartPattern(const GURL& url) {
std::string domain = eTLDPlusOne(url);
auto* pattern_from_component =
commerce_heuristics::CommerceHeuristicsData::GetInstance()
.GetCartPageURLPatternForDomain(domain);
if (pattern_from_component &&
commerce::kCartPatternMapping.Get() ==
commerce::kCartPatternMapping.default_value) {
return pattern_from_component;
}
const std::map<std::string, std::string>& cart_string_map =
GetCartPatternMapping();
static base::NoDestructor<std::map<std::string, std::unique_ptr<re2::RE2>>>
cart_regex_map;
static re2::RE2::Options options;
options.set_case_sensitive(false);
if (cart_string_map.find(domain) == cart_string_map.end()) {
auto* global_pattern_from_component =
commerce_heuristics::CommerceHeuristicsData::GetInstance()
.GetCartPageURLPattern();
if (global_pattern_from_component &&
commerce::kCartPattern.Get() == commerce::kCartPattern.default_value) {
return global_pattern_from_component;
}
static base::NoDestructor<re2::RE2> instance(commerce::kCartPattern.Get(),
options);
return instance.get();
}
if (cart_regex_map->find(domain) == cart_regex_map->end()) {
cart_regex_map->insert({domain, std::make_unique<re2::RE2>(
cart_string_map.at(domain), options)});
}
return cart_regex_map->at(domain).get();
}
// TODO(crbug.com/40163450): cover more shopping sites.
const re2::RE2* GetVisitCheckoutPattern(const GURL& url) {
std::string domain = eTLDPlusOne(url);
auto* pattern_from_component =
commerce_heuristics::CommerceHeuristicsData::GetInstance()
.GetCheckoutPageURLPatternForDomain(domain);
if (pattern_from_component &&
commerce::kCheckoutPatternMapping.Get() ==
commerce::kCheckoutPatternMapping.default_value) {
return pattern_from_component;
}
const std::map<std::string, std::string>& checkout_string_map =
GetCheckoutPatternMapping();
static base::NoDestructor<std::map<std::string, std::unique_ptr<re2::RE2>>>
checkout_regex_map;
static re2::RE2::Options options;
options.set_case_sensitive(false);
if (checkout_string_map.find(domain) == checkout_string_map.end()) {
auto* global_pattern_from_component =
commerce_heuristics::CommerceHeuristicsData::GetInstance()
.GetCheckoutPageURLPattern();
if (global_pattern_from_component &&
commerce::kCheckoutPattern.Get() ==
commerce::kCheckoutPattern.default_value) {
CommerceHeuristicsDataMetricsHelper::
RecordCheckoutURLGeneralPatternSource(
CommerceHeuristicsDataMetricsHelper::HeuristicsSource::
FROM_COMPONENT);
return global_pattern_from_component;
}
static base::NoDestructor<re2::RE2> instance(
commerce::kCheckoutPattern.Get(), options);
CommerceHeuristicsDataMetricsHelper::RecordCheckoutURLGeneralPatternSource(
CommerceHeuristicsDataMetricsHelper::HeuristicsSource::
FROM_FEATURE_PARAMETER);
return instance.get();
}
if (checkout_regex_map->find(domain) == checkout_regex_map->end()) {
checkout_regex_map->insert(
{domain,
std::make_unique<re2::RE2>(checkout_string_map.at(domain), options)});
}
return checkout_regex_map->at(domain).get();
}
std::string CanonicalURL(const GURL& url) {
return base::JoinString({url.scheme_piece(), "://", url.host_piece(),
url.path_piece().substr(0, kLengthLimit)},
"");
}
} // namespace
bool IsVisitCart(const GURL& url) {
auto* pattern = GetVisitCartPattern(url);
if (!pattern)
return false;
return RE2::PartialMatch(CanonicalURL(url).substr(0, kLengthLimit), *pattern);
}
bool IsVisitCheckout(const GURL& url) {
auto* pattern = GetVisitCheckoutPattern(url);
if (!pattern)
return false;
return RE2::PartialMatch(url.spec().substr(0, kLengthLimit), *pattern);
}
} // namespace commerce_heuristics
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