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// Copyright 2020 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/autofill/core/browser/geo/alternative_state_name_map.h"
#include "base/no_destructor.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
namespace autofill {
namespace {
// Assuming a user can have maximum 500 profiles each containing a different
// state string in the worst case scenario.
constexpr int kMaxMapSize = 500;
// The characters to be removed from the state strings before the comparison.
constexpr char16_t kCharsToStrip[] = u".- ";
} // namespace
// static
AlternativeStateNameMap* AlternativeStateNameMap::GetInstance() {
static base::NoDestructor<AlternativeStateNameMap>
g_alternative_state_name_map;
return g_alternative_state_name_map.get();
}
// static
AlternativeStateNameMap::StateName AlternativeStateNameMap::NormalizeStateName(
const StateName& text) {
std::u16string normalized_text;
base::RemoveChars(text.value(), kCharsToStrip, &normalized_text);
return StateName(normalized_text);
}
// static
absl::optional<AlternativeStateNameMap::CanonicalStateName>
AlternativeStateNameMap::GetCanonicalStateName(
const std::string& country_code,
const std::u16string& state_name) {
return AlternativeStateNameMap::GetInstance()->GetCanonicalStateName(
AlternativeStateNameMap::CountryCode(country_code),
AlternativeStateNameMap::StateName(state_name));
}
AlternativeStateNameMap::AlternativeStateNameMap() = default;
absl::optional<AlternativeStateNameMap::CanonicalStateName>
AlternativeStateNameMap::GetCanonicalStateName(
const CountryCode& country_code,
const StateName& state_name,
bool is_state_name_normalized) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(alternative_state_name_map_sequence_checker_);
// Example:
// Entries in |localized_state_names_map_| are:
// ("DE", "Bavaria") -> {
// "canonical_name": "Bayern",
// "abbreviations": "BY",
// "alternative_names": "Bavaria"
// }
// Entries in |localized_state_names_reverse_lookup_map_| are:
// ("DE", "Bayern") -> "Bayern"
// ("DE", "BY") -> "Bayern"
// ("DE", "Bavaria") -> "Bayern"
// then, AlternativeStateNameMap::GetCanonicalStateName("DE", "Bayern") =
// AlternativeStateNameMap::GetCanonicalStateName("DE", "BY") =
// AlternativeStateNameMap::GetCanonicalStateName("DE", "Bavaria") =
// CanonicalStateName("Bayern")
StateName normalized_state_name = state_name;
if (!is_state_name_normalized)
normalized_state_name = NormalizeStateName(state_name);
auto it = localized_state_names_reverse_lookup_map_.find(
{country_code, normalized_state_name});
if (it != localized_state_names_reverse_lookup_map_.end())
return it->second;
return absl::nullopt;
}
absl::optional<StateEntry> AlternativeStateNameMap::GetEntry(
const CountryCode& country_code,
const StateName& state_string_from_profile) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(alternative_state_name_map_sequence_checker_);
StateName normalized_state_string_from_profile =
NormalizeStateName(state_string_from_profile);
absl::optional<CanonicalStateName> canonical_state_name =
GetCanonicalStateName(country_code, normalized_state_string_from_profile,
/*is_state_name_normalized=*/true);
if (canonical_state_name) {
auto it = localized_state_names_map_.find(
{country_code, canonical_state_name.value()});
if (it != localized_state_names_map_.end())
return it->second;
}
return absl::nullopt;
}
void AlternativeStateNameMap::AddEntry(
const CountryCode& country_code,
const StateName& normalized_state_value_from_profile,
const StateEntry& state_entry,
const std::vector<StateName>& normalized_alternative_state_names,
const CanonicalStateName& normalized_canonical_state_name) {
DCHECK_CALLED_ON_VALID_SEQUENCE(alternative_state_name_map_sequence_checker_);
// Example:
// AddEntry("DE", "Bavaria", {
// "canonical_name": "Bayern",
// "abbreviations": "BY",
// "alternative_names": "Bavaria"
// }, {"Bavaria", "BY", "Bayern"}, "Bayern")
// Then entry added to |localized_state_names_map_| is:
// ("DE", "Bayern") -> {
// "canonical_name": "Bayern",
// "abbreviations": "BY",
// "alternative_names": "Bavaria"
// }
// Entries added to |localized_state_names_reverse_lookup_map_| are:
// ("DE", "Bayern") -> "Bayern"
// ("DE", "BY") -> "Bayern"
// ("DE", "Bavaria") -> "Bayern"
if (localized_state_names_map_.size() == kMaxMapSize ||
GetCanonicalStateName(country_code, normalized_state_value_from_profile,
/*is_state_name_normalized=*/true)) {
return;
}
localized_state_names_map_[{country_code, normalized_canonical_state_name}] =
state_entry;
for (const auto& alternative_name : normalized_alternative_state_names) {
localized_state_names_reverse_lookup_map_[{
country_code, alternative_name}] = normalized_canonical_state_name;
}
}
bool AlternativeStateNameMap::IsLocalisedStateNamesMapEmpty() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(alternative_state_name_map_sequence_checker_);
return localized_state_names_map_.empty();
}
void AlternativeStateNameMap::ClearAlternativeStateNameMap() {
DCHECK_CALLED_ON_VALID_SEQUENCE(alternative_state_name_map_sequence_checker_);
localized_state_names_map_.clear();
localized_state_names_reverse_lookup_map_.clear();
}
} // namespace autofill
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