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