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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.
#ifndef COMPONENTS_COMMERCE_CORE_COMMERCE_HEURISTICS_DATA_H_
#define COMPONENTS_COMMERCE_CORE_COMMERCE_HEURISTICS_DATA_H_
#include <string>
#include "base/time/time.h"
#include "base/values.h"
#include "base/version.h"
#include "third_party/re2/src/re2/re2.h"
namespace commerce_heuristics {
class CommerceHeuristicsData {
public:
static CommerceHeuristicsData& GetInstance();
CommerceHeuristicsData();
CommerceHeuristicsData(const CommerceHeuristicsData&) = delete;
CommerceHeuristicsData& operator=(const CommerceHeuristicsData&) = delete;
~CommerceHeuristicsData();
// Called by component installer to update the version number of the
// heuristics.
void UpdateVersion(base::Version version);
// Get the current version number of the heuristics.
const std::string GetVersion();
// Populate and cache the heuristics from JSON data.
bool PopulateDataFromComponent(const std::string& hint_json_data,
const std::string& global_json_data,
const std::string& product_id_json_data,
const std::string& cart_extraction_script);
// Try to get merchant name for `domain`.
std::optional<std::string> GetMerchantName(const std::string& domain);
// Try to get merchant cart URL for `domain`.
std::optional<std::string> GetMerchantCartURL(const std::string& domain);
// Try to get hint heuristics JSON data for `domain`.
std::optional<std::string> GetHintHeuristicsJSONForDomain(
const std::string& domain);
// Try to get global heuristics JSON data.
std::optional<std::string> GetGlobalHeuristicsJSON();
// Try to get the product skip pattern.
const re2::RE2* GetProductSkipPattern();
// Try to get the pattern regex to decide if a merchant is a partner merchant
// for rule discount.
const re2::RE2* GetRuleDiscountPartnerMerchantPattern();
// Try to get the pattern regex to decide if a merchant is a partner merchant
// for coupon discount.
const re2::RE2* GetCouponDiscountPartnerMerchantPattern();
// Try to get the pattern regex to decide if a merchant is one the merchants
// that currently have no discounts. This pattern is determined on the server
// side.
const re2::RE2* GetNoDiscountMerchantPattern();
// Try to get the pattern regex to decide if a URL is cart page URL.
const re2::RE2* GetCartPageURLPattern();
// Try to get the pattern regex to decide if a URL is checkout page URL.
const re2::RE2* GetCheckoutPageURLPattern();
// Try to get the pattern regex to decide if a button is a purchase button.
const re2::RE2* GetPurchaseButtonTextPattern();
// Try to get the pattern regex to decide if a request is a add-to-cart
// request.
const re2::RE2* GetAddToCartRequestPattern();
// Try to get the pattern regex to decide if a URL is cart page URL in
// `domain`.
const re2::RE2* GetCartPageURLPatternForDomain(const std::string& domain);
// Try to get the pattern regex to decide if a URL is checkout page URL in
// `domain`.
const re2::RE2* GetCheckoutPageURLPatternForDomain(const std::string& domain);
// Try to get the pattern regex to decide if a URL is purchase page URL in
// `domain`.
const re2::RE2* GetPurchasePageURLPatternForDomain(const std::string& domain);
// Try to get the pattern regex used to match against XHR request URL to see
// if the request should be ignored for AddToCart detection in `domain`.
const re2::RE2* GetSkipAddToCartPatternForDomain(const std::string& domain);
// Get the JSON data with product ID extraction heuristics.
std::string GetProductIDExtractionJSON();
// Get the cart extraction script.
std::string GetCartProductExtractionScript();
// Get the time delay between discount fetches.
std::optional<base::TimeDelta> GetDiscountFetchDelay();
private:
friend class CommerceHeuristicsDataTest;
std::optional<std::string> GetCommerceHintHeuristics(
const std::string& type,
const std::string& domain);
std::optional<std::string> GetCommerceGlobalHeuristics(
const std::string& type);
const re2::RE2* GetCommerceHintHeuristicsRegex(
std::map<std::string, std::unique_ptr<re2::RE2>>& map,
const std::string type,
const std::string domain);
std::unique_ptr<re2::RE2> ConstructGlobalRegex(const std::string& type);
base::Version version_;
base::Value::Dict hint_heuristics_;
base::Value::Dict global_heuristics_;
std::string global_heuristics_string_;
std::unique_ptr<re2::RE2> product_skip_pattern_;
std::unique_ptr<re2::RE2> rule_discount_partner_merchant_pattern_;
std::unique_ptr<re2::RE2> coupon_discount_partner_merchant_pattern_;
std::unique_ptr<re2::RE2> no_discount_merchant_pattern_;
std::unique_ptr<re2::RE2> cart_url_pattern_;
std::unique_ptr<re2::RE2> checkout_url_pattern_;
std::unique_ptr<re2::RE2> purchase_button_pattern_;
std::unique_ptr<re2::RE2> add_to_cart_request_pattern_;
std::map<std::string, std::unique_ptr<re2::RE2>>
domain_cart_url_pattern_mapping_;
std::map<std::string, std::unique_ptr<re2::RE2>>
domain_checkout_url_pattern_mapping_;
std::map<std::string, std::unique_ptr<re2::RE2>>
domain_purchase_url_pattern_mapping_;
std::map<std::string, std::unique_ptr<re2::RE2>>
domain_skip_add_to_cart_pattern_mapping_;
std::string product_id_json_;
std::string cart_extraction_script_;
};
} // namespace commerce_heuristics
#endif // COMPONENTS_COMMERCE_CORE_COMMERCE_HEURISTICS_DATA_H_
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