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Twig Translation Extension

A Twig Translation Extension.\ This twig extension has been forked from Odan/Twig-Translation because I wanted more flexibility with available methods for translating.\ So, this extension uses delight-im/PHP-I18N to handle the translations.

Requirements

• PHP 7.4 or PHP 8.0

Installation - These instructions assume using php-di for the dependency injection

composer require darkalchemy/twig-translate

Integration

Register the Twig Extension and, the locale codes that will be available

This makes the functions available for all strings that are in twig templates

In your container

\Delight\I18n\I18n::class => DI\factory(function () {
    return new \Delight\I18n\I18n([
        \Delight\I18n\Codes::EN_US,
        \Delight\I18n\Codes::FR_FR,
    ]);
}),

\Slim\Views\Twig::class => function (\Psr\Container\ContainerInterface $container) {
    $settings = $container->get(Configuration::class)->all();
    $twig = \Slim\Views\Twig::create($settings['twig']['path'], [
        'cache' => $settings['twig']['cache'] ?? false,
    ]);
    $twig->addExtension(new \darkalchemy\Twig\TwigTranslationExtension($container->get(\Delight\I18n\I18n::class)));

    return $twig;
}

Add an $i18n into app.php, so that it can be called by global in helpers.php

$i18n = $container->get(\Delight\I18n\I18n::class);

Add the functions, in a file like helpers.php. This makes the functions available for all strings not in twig templates

function compile_twig_templates(\Psr\Container\ContainerInterface $container)
{
    $settings    = $container->get(\Selective\Config\Configuration::class)->all();
    $twig_config = $settings['twig'];
    $cache       = $twig_config['cache'] ?? $settings['root'] . '/resources/views/cache/';
    $twig        = $container->get(Twig::class)->getEnvironment();
    $compiler = new \darkalchemy\Twig\TwigCompiler($twig, $cache);

    try {
        $compiler->compile();
    } catch (Exception $e) {
        die($e->getMessage());
    }

    echo "\nCompiling twig templates completed\n\n";
    echo "to fix the permissions, you should run:\nsudo chown -R www-data:www-data {$cache}\nsudo chmod -R 0775 {$cache}\n";

    return 0;
}

function __f(string $text, ...$replacements)
{
    global $i18n;

    return $i18n->translateFormatted($text, ...$replacements);
}

function __fe(string $text, ...$replacements)
{
    global $i18n;

    return $i18n->translateFormattedExtended($text, ...$replacements);
}

function __p(string $text, string $alternative, int $count)
{
    global $i18n;

    return $i18n->translatePlural($text, $alternative, $count);
}

function __pf(string $text, string $alternative, int $count, ...$replacements)
{
    global $i18n;

    return $i18n->translatePluralFormatted($text, $alternative, $count, ...$replacements);
}

function __pfe(string $text, string $alternative, int $count, ...$replacements)
{
    global $i18n;

    return $i18n->translatePluralFormattedExtended($text, $alternative, $count, ...$replacements);
}

function __c(string $text, string $context)
{
    global $i18n;

    return $i18n->translateWithContext($text, $context);
}

function __m(string $text)
{
    global $i18n;

    return $i18n->markForTranslation($text);
}

Copy i18n.sh from I18n to the bin directory

cp vendor/delight-im/i18n/i18n.sh bin/
chmod a+x bin/i18n.sh

In order to translate your twig templates, you first need to compile the templates. Create a file bin/translate.php and add this to it

<?php

declare(strict_types=1);

use Delight\I18n\I18n;
use Selective\Config\Configuration;

$container = (require_once __DIR__ . '/../bootstrap/app.php')->getContainer();

$root_path = $container->get(Configuration::class)->findString('root');
$processes = [
    'compile',
    'translate',
];

$languages = [];
$locales   = $container->get(I18n::class)->getSupportedLocales();
foreach ($locales as $locale) {
    $languages[] = str_replace('-', '_', $locale);
}
$process = 'compile';
$lang    = 'en_US';
foreach ($argv as $arg) {
    if (in_array($arg, $processes)) {
        $process = $arg;
    } elseif (in_array($arg, $languages)) {
        $lang = $arg;
    }
}

switch ($process) {
    case 'translate':
        copy($root_path . '/bin/i18n.sh', $root_path . '/i18n.sh');
        chmod($root_path . '/i18n.sh', 0755);
        passthru("sed -i -E 's/\\-\\-(keyword|flag)=\"_(f|p|c|m)/\\-\\-\\1=\"__\\2/g' {$file}");
        passthru("sed -i 's/\\-\\-keyword \\-\\-keyword/\\-\\-keyword \\-\\-keyword=\"translateFormatted:1\" \\-\\-keyword=\"translateFormattedExtended:1\" \\-\\-keyword=\"translatePlural:1,2,3t\" \\-\\-keyword=\"translatePluralFormatted:1,2\" \\-\\-keyword=\"translatePluralFormattedExtended:1,2\" \\-\\-keyword=\"translateWithContext:1,2c,2t\" \\-\\-keyword=\"markForTranslation:1,1t\" \\-\\-flag=\"translateFormatted:1:php\\-format\" \\-\\-flag=\"translateFormattedExtended:1:no\\-php\\-format\" \\-\\-flag=\"translatePluralFormatted:1:php\\-format\" \\-\\-flag=\"translatePluralFormattedExtended:1:no\\-php\\-format\" \\-\\-keyword/g' i18n.sh");
        passthru(sprintf('./i18n.sh %s', $lang));
        unlink($root_path . '/i18n.sh');

        break;
    default:
        compile_twig_templates($container);

        break;
}

To translate into fr_FR locale, run

php bin/translate.php fr_FR

Then, edit the messages.po in poedit, validate and save.

For full documentation on how to use each of the functions, please refer to PHP-I18n where each function is well documented.