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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\Loader;

/**
 * @copyright Copyright (c) 2010, Union of RAD https://github.com/UnionOfRAD/lithium
 * @copyright Copyright (c) 2012, Clemens Tolboom
 */
class PoFileLoader extends FileLoader
{
    /**
     * Parses portable object (PO) format.
     *
     * From https://www.gnu.org/software/gettext/manual/gettext.html#PO-Files
     * we should be able to parse files having:
     *
     * white-space
     * #  translator-comments
     * #. extracted-comments
     * #: reference...
     * #, flag...
     * #| msgid previous-untranslated-string
     * msgid untranslated-string
     * msgstr translated-string
     *
     * extra or different lines are:
     *
     * #| msgctxt previous-context
     * #| msgid previous-untranslated-string
     * msgctxt context
     *
     * #| msgid previous-untranslated-string-singular
     * #| msgid_plural previous-untranslated-string-plural
     * msgid untranslated-string-singular
     * msgid_plural untranslated-string-plural
     * msgstr[0] translated-string-case-0
     * ...
     * msgstr[N] translated-string-case-n
     *
     * The definition states:
     * - white-space and comments are optional.
     * - msgid "" that an empty singleline defines a header.
     *
     * This parser sacrifices some features of the reference implementation the
     * differences to that implementation are as follows.
     * - No support for comments spanning multiple lines.
     * - Translator and extracted comments are treated as being the same type.
     * - Message IDs are allowed to have other encodings as just US-ASCII.
     *
     * Items with an empty id are ignored.
     */
    protected function loadResource(string $resource): array
    {
        $stream = fopen($resource, 'r');

        $defaults = [
            'ids' => [],
            'translated' => null,
        ];

        $messages = [];
        $item = $defaults;
        $flags = [];

        while ($line = fgets($stream)) {
            $line = trim($line);

            if ('' === $line) {
                // Whitespace indicated current item is done
                if (!\in_array('fuzzy', $flags)) {
                    $this->addMessage($messages, $item);
                }
                $item = $defaults;
                $flags = [];
            } elseif (str_starts_with($line, '#,')) {
                $flags = array_map('trim', explode(',', substr($line, 2)));
            } elseif (str_starts_with($line, 'msgid "')) {
                // We start a new msg so save previous
                // TODO: this fails when comments or contexts are added
                $this->addMessage($messages, $item);
                $item = $defaults;
                $item['ids']['singular'] = substr($line, 7, -1);
            } elseif (str_starts_with($line, 'msgstr "')) {
                $item['translated'] = substr($line, 8, -1);
            } elseif ('"' === $line[0]) {
                $continues = isset($item['translated']) ? 'translated' : 'ids';

                if (\is_array($item[$continues])) {
                    end($item[$continues]);
                    $item[$continues][key($item[$continues])] .= substr($line, 1, -1);
                } else {
                    $item[$continues] .= substr($line, 1, -1);
                }
            } elseif (str_starts_with($line, 'msgid_plural "')) {
                $item['ids']['plural'] = substr($line, 14, -1);
            } elseif (str_starts_with($line, 'msgstr[')) {
                $size = strpos($line, ']');
                $item['translated'][(int) substr($line, 7, 1)] = substr($line, $size + 3, -1);
            }
        }
        // save last item
        if (!\in_array('fuzzy', $flags)) {
            $this->addMessage($messages, $item);
        }
        fclose($stream);

        return $messages;
    }

    /**
     * Save a translation item to the messages.
     *
     * A .po file could contain by error missing plural indexes. We need to
     * fix these before saving them.
     */
    private function addMessage(array &$messages, array $item)
    {
        if (!empty($item['ids']['singular'])) {
            $id = stripcslashes($item['ids']['singular']);
            if (isset($item['ids']['plural'])) {
                $id .= '|'.stripcslashes($item['ids']['plural']);
            }

            $translated = (array) $item['translated'];
            // PO are by definition indexed so sort by index.
            ksort($translated);
            // Make sure every index is filled.
            end($translated);
            $count = key($translated);
            // Fill missing spots with '-'.
            $empties = array_fill(0, $count + 1, '-');
            $translated += $empties;
            ksort($translated);

            $messages[$id] = stripcslashes(implode('|', $translated));
        }
    }
}

Filemanager

Name Type Size Permission Actions
ArrayLoader.php File 1.37 KB 0644
CsvFileLoader.php File 1.69 KB 0644
FileLoader.php File 1.68 KB 0644
IcuDatFileLoader.php File 1.79 KB 0644
IcuResFileLoader.php File 2.72 KB 0644
IniFileLoader.php File 537 B 0644
JsonFileLoader.php File 1.49 KB 0644
LoaderInterface.php File 950 B 0644
MoFileLoader.php File 4.17 KB 0644
PhpFileLoader.php File 1.02 KB 0644
PoFileLoader.php File 4.98 KB 0644
QtFileLoader.php File 2.77 KB 0644
XliffFileLoader.php File 8.62 KB 0644
YamlFileLoader.php File 1.57 KB 0644