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// Copyright (C) 2013 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 "address_field_util.h"
#include <libaddressinput/address_field.h>
#include <algorithm>
#include <cassert>
#include <string>
#include <vector>
#include "format_element.h"
namespace i18n {
namespace addressinput {
namespace {
// Check whether |c| is a field token character. On success, return true
// and sets |*field| to the corresponding AddressField value. Return false
// on failure.
bool ParseFieldToken(char c, AddressField* field) {
assert(field != nullptr);
// Simple mapping from field token characters to AddressField values.
static const struct { char c; AddressField field; } kTokenMap[] = {
{ 'R', COUNTRY },
{ 'S', ADMIN_AREA },
{ 'C', LOCALITY },
{ 'D', DEPENDENT_LOCALITY },
{ 'X', SORTING_CODE },
{ 'Z', POSTAL_CODE },
{ 'A', STREET_ADDRESS },
{ 'O', ORGANIZATION },
{ 'N', RECIPIENT },
};
for (const auto& entry : kTokenMap) {
if (c == entry.c) {
*field = entry.field;
return true;
}
}
return false;
}
} // namespace
void ParseFormatRule(const std::string& format,
std::vector<FormatElement>* elements) {
assert(elements != nullptr);
elements->clear();
std::string::const_iterator prev = format.begin();
for (std::string::const_iterator next = format.begin();
next != format.end(); prev = ++next) {
// Find the next field element or newline (indicated by %<TOKEN>).
if ((next = std::find(next, format.end(), '%')) == format.end()) {
// No more tokens in the format string.
break;
}
if (prev < next) {
// Push back preceding literal.
elements->push_back(FormatElement(std::string(prev, next)));
}
if ((prev = ++next) == format.end()) {
// Move forward and check we haven't reached the end of the string
// (unlikely, it shouldn't end with %).
break;
}
// Process the token after the %.
AddressField field;
if (*next == 'n') {
elements->push_back(FormatElement());
} else if (ParseFieldToken(*next, &field)) {
elements->push_back(FormatElement(field));
} // Else it's an unknown token, we ignore it.
}
// Push back any trailing literal.
if (prev != format.end()) {
elements->push_back(FormatElement(std::string(prev, format.end())));
}
}
void ParseAddressFieldsRequired(const std::string& required,
std::vector<AddressField>* fields) {
assert(fields != nullptr);
fields->clear();
for (char c : required) {
AddressField field;
if (ParseFieldToken(c, &field)) {
fields->push_back(field);
}
}
}
} // namespace addressinput
} // namespace i18n