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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: ['foo.bar' => 'value'] will be converted to ['foo' => ['bar' => 'value']]. * * @param array $messages Linear messages array */ public static function expandToTree(array $messages): array { $tree = []; foreach ($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): mixed { $elem = &$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): void { $prefix .= '.'; foreach ($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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