Creates a po file from a (ownC|Nextc)loud JSON file in the server code. Call it like this: `php reverse-l10n.php de`

reverse-l10n.php

<?php
/**
 * composer install gettext/gettext
 */

require 'vendor/autoload.php';

use Gettext\Translations;

$apps = [
	'comments',
	'encryption',
	'federatedfilesharing',
	'federation',
	'files',
	'files_external',
	'files_sharing',
	'files_trashbin',
	'files_versions',
	'systemtags',
	'updatenotification',
	'user_ldap',
];


function getTranslations($file, $language) {
	if(!file_exists(__DIR__ . '/../' . $file)) {
		throw new \Exception();
	}
	$data = json_decode(file_get_contents(__DIR__ . '/../' . $file), true);

	$translations = new Translations();

	foreach($data['translations'] as $key => $value) {
		$plural = '';
		if(strpos($key, '_') === 0 && strrpos($key, '_') === strlen($key)-1 && strpos($key, '_::_') !== false) {
			$key = trim($key, '_');
			$split = explode('_::_', $key);
			$key = $split[0];
			$plural = $split[1];
		}
		$t = new \Gettext\Translation('', $key, $plural);
		if(is_string($value)) {
			$t->setTranslation($value);
			if(strpos($value, '%') !== false || strpos($value, '{') !== false) {
				$t->addFlag('php-format');
			}
		} else {
			$a = array_shift($value);
			$t->setTranslation($a);
			$t->setPluralTranslations($value);
		}
		$translations[] = $t;
	}

	$translations->setLanguage($language);
	$translations->setHeader(Translations::HEADER_PLURAL, $data['pluralForm']);
	
	return $translations;
}

$lang = $argv[1];

if(!file_exists($lang)) {
	mkdir($lang);
}


foreach ($apps as $app) {
	try {
		$file = 'apps/' . $app . '/l10n/' . $lang . '.json';
		$translations = getTranslations($file, $lang);
		//Export to a po file
		$translations->toPoFile($lang . '/' . $app . '.po');
	} catch (\Exception $e) {
		echo "Skipped " . $lang . ' ' . $app . PHP_EOL;
	}
}

$libs = [
	'settings',
	'lib',
	'core'
];

foreach ($libs as $lib) {
	try {
		$file = $lib . '/l10n/' . $lang . '.json';
		$translations = getTranslations($file, $lang);
		//Export to a po file
		$translations->toPoFile($lang . '/' . $lib . '.po');
	} catch (\Exception $e) {
		echo "Skipped " . $lang . ' ' . $lib  . PHP_EOL;
	}
}