chromium/components/facilitated_payments/core/util/pix_code_validator.cc

// 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/facilitated_payments/core/util/pix_code_validator.h"

#include "base/functional/callback.h"
#include "base/strings/string_util.h"
#include "third_party/re2/src/re2/re2.h"

namespace payments::facilitated {
namespace {

constexpr char kSectionIdAndSizePattern[] = …;
constexpr char kPayloadFormatIndicatorFirstSectionId[] = …;
constexpr char kMerchantAccountInformationSectionId[] = …;
constexpr char kMerchantAccountInformationDynamicUrlSectionId[] = …;
constexpr char kAdditionalDataFieldTemplateSectionId[] = …;
constexpr char kCrc16LastSectionId[] = …;
constexpr char kPixCodeIndicatorLowercase[] = …;

struct SectionInfo { … };

// Returns true if `code` starts with a valid PIX `code` section.
// A valid PIX code section comprises:
// 1) Two digits of section ID.
// 2) Two digits of section size |N|.
// 3) Section value of length |N|.
bool ParseNextSection(std::string_view* code, SectionInfo* section_info) { … }

// Returns true if the `input` string consists of valid PIX code sections.
bool ContainsValidSections(std::string_view input) { … }

}  // namespace

PixCodeValidator::PixCodeValidator() = default;

PixCodeValidator::~PixCodeValidator() = default;

// static
bool PixCodeValidator::IsValidPixCode(std::string_view code) { … }

// static
bool PixCodeValidator::ContainsPixIdentifier(std::string_view code) { … }

void PixCodeValidator::ValidatePixCode(
    const std::string& input_text,
    base::OnceCallback<void(std::optional<bool>)> callback) { … }

}  // namespace payments::facilitated