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// Copyright (C) 2014 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <libaddressinput/region_data_builder.h>
#include <libaddressinput/address_data.h>
#include <libaddressinput/preload_supplier.h>
#include <libaddressinput/region_data.h>
#include <cassert>
#include <cstddef>
#include <string>
#include <utility>
#include <vector>
#include "language.h"
#include "lookup_key.h"
#include "region_data_constants.h"
#include "rule.h"
namespace i18n {
namespace addressinput {
namespace {
// Does not take ownership of |supplier| or |parent_region|, neither of which is
// allowed to be NULL.
void BuildRegionTreeRecursively(PreloadSupplier* supplier,
const LookupKey& parent_key,
RegionData* parent_region,
const std::vector<std::string>& keys,
bool prefer_latin_name) {
assert(supplier != NULL);
assert(parent_region != NULL);
LookupKey lookup_key;
for (std::vector<std::string>::const_iterator key_it = keys.begin();
key_it != keys.end(); ++key_it) {
lookup_key.FromLookupKey(parent_key, *key_it);
const Rule* rule = supplier->GetRule(lookup_key);
if (rule == NULL) {
return;
}
const std::string& local_name = rule->GetName().empty()
? *key_it : rule->GetName();
const std::string& name =
prefer_latin_name && !rule->GetLatinName().empty()
? rule->GetLatinName() : local_name;
RegionData* region = parent_region->AddSubRegion(*key_it, name);
if (!rule->GetSubKeys().empty()) {
BuildRegionTreeRecursively(supplier, lookup_key, region,
rule->GetSubKeys(), prefer_latin_name);
}
}
}
// Does not take ownership of |supplier|, which cannot be NULL. The caller owns
// the result.
RegionData* BuildRegion(PreloadSupplier* supplier,
const std::string& region_code,
const Language& language) {
assert(supplier != NULL);
AddressData address;
address.region_code = region_code;
LookupKey lookup_key;
lookup_key.FromAddress(address);
const Rule* const rule = supplier->GetRule(lookup_key);
assert(rule != NULL);
RegionData* region = new RegionData(region_code);
BuildRegionTreeRecursively(supplier, lookup_key, region,
rule->GetSubKeys(), language.has_latin_script);
return region;
}
} // namespace
RegionDataBuilder::RegionDataBuilder(PreloadSupplier* supplier)
: supplier_(supplier),
cache_() {
assert(supplier_ != NULL);
}
RegionDataBuilder::~RegionDataBuilder() {
for (RegionCodeDataMap::const_iterator region_it = cache_.begin();
region_it != cache_.end(); ++region_it) {
for (LanguageRegionMap::const_iterator
language_it = region_it->second->begin();
language_it != region_it->second->end(); ++language_it) {
delete language_it->second;
}
delete region_it->second;
}
}
const RegionData& RegionDataBuilder::Build(
const std::string& region_code,
const std::string& ui_language_tag,
std::string* best_region_tree_language_tag) {
assert(supplier_->IsLoaded(region_code));
assert(best_region_tree_language_tag != NULL);
// Look up the region tree in cache first before building it.
RegionCodeDataMap::const_iterator region_it = cache_.find(region_code);
if (region_it == cache_.end()) {
region_it =
cache_.insert(std::make_pair(region_code, new LanguageRegionMap)).first;
}
// No need to copy from default rule first, because only languages and Latin
// format are going to be used, which do not exist in the default rule.
Rule rule;
rule.ParseSerializedRule(RegionDataConstants::GetRegionData(region_code));
static const Language kUndefinedLanguage("und");
const Language& best_language = rule.GetLanguages().empty()
? kUndefinedLanguage
: ChooseBestAddressLanguage(rule, Language(ui_language_tag));
*best_region_tree_language_tag = best_language.tag;
LanguageRegionMap::const_iterator language_it =
region_it->second->find(best_language.tag);
if (language_it == region_it->second->end()) {
language_it = region_it->second->insert(std::make_pair(
best_language.tag,
BuildRegion(supplier_, region_code, best_language))).first;
}
return *language_it->second;
}
} // namespace addressinput
} // namespace i18n
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