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public/vendor/symfony/translation/Util/ArrayConverter.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Translation\Util;
/**
* ArrayConverter generates tree like structure from a message catalogue.
* e.g. this
* 'foo.bar1' => 'test1',
* 'foo.bar2' => 'test2'
* converts to follows:
* foo:
* bar1: test1
* bar2: test2.
*
* @author Gennady Telegin <gtelegin@gmail.com>
*/
class ArrayConverter
{
/**
* Converts linear messages array to tree-like array.
* For example this array('foo.bar' => 'value') will be converted to ['foo' => ['bar' => 'value']].
*
* @param array $messages Linear messages array
*
* @return array
*/
public static function expandToTree(array $messages)
{
$tree = [];
foreach ($messages as $id => $value) {
$referenceToElement = &self::getElementByPath($tree, self::getKeyParts($id));
$referenceToElement = $value;
unset($referenceToElement);
}
return $tree;
}
private static function &getElementByPath(array &$tree, array $parts)
{
$elem = &$tree;
$parentOfElem = null;
foreach ($parts as $i => $part) {
if (isset($elem[$part]) && \is_string($elem[$part])) {
/* Process next case:
* 'foo': 'test1',
* 'foo.bar': 'test2'
*
* $tree['foo'] was string before we found array {bar: test2}.
* Treat new element as string too, e.g. add $tree['foo.bar'] = 'test2';
*/
$elem = &$elem[implode('.', \array_slice($parts, $i))];
break;
}
$parentOfElem = &$elem;
$elem = &$elem[$part];
}
if ($elem && \is_array($elem) && $parentOfElem) {
/* Process next case:
* 'foo.bar': 'test1'
* 'foo': 'test2'
*
* $tree['foo'] was array = {bar: 'test1'} before we found string constant `foo`.
* Cancel treating $tree['foo'] as array and cancel back it expansion,
* e.g. make it $tree['foo.bar'] = 'test1' again.
*/
self::cancelExpand($parentOfElem, $part, $elem);
}
return $elem;
}
private static function cancelExpand(array &$tree, string $prefix, array $node)
{
$prefix .= '.';
foreach ($node as $id => $value) {
if (\is_string($value)) {
$tree[$prefix.$id] = $value;
} else {
self::cancelExpand($tree, $prefix.$id, $value);
}
}
}
/**
* @return string[]
*/
private static function getKeyParts(string $key): array
{
$parts = explode('.', $key);
$partsCount = \count($parts);
$result = [];
$buffer = '';
foreach ($parts as $index => $part) {
if (0 === $index && '' === $part) {
$buffer = '.';
continue;
}
if ($index === $partsCount - 1 && '' === $part) {
$buffer .= '.';
$result[] = $buffer;
continue;
}
if (isset($parts[$index + 1]) && '' === $parts[$index + 1]) {
$buffer .= $part;
continue;
}
if ($buffer) {
$result[] = $buffer.$part;
$buffer = '';
continue;
}
$result[] = $part;
}
return $result;
}
}
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