friendica/src/Console/PoToPhp.php
2022-01-02 08:27:47 +01:00

243 lines
6.3 KiB
PHP

<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Console;
use Geekwright\Po\PoFile;
use Geekwright\Po\PoTokens;
/**
* Read a messages.po file and create strings.php in the same directory
*/
class PoToPhp extends \Asika\SimpleConsole\Console
{
protected $helpOptions = ['h', 'help', '?'];
const DQ_ESCAPE = "__DQ__";
protected function getHelp()
{
$help = <<<HELP
console php2po - Generate a strings.php file from a messages.po file
Usage
bin/console php2po <path/to/messages.po> [-h|--help|-?] [-v]
Description
Read a messages.po file and create the according strings.php in the same directory
Options
-h|--help|-? Show help information
-v Show more debug information.
HELP;
return $help;
}
protected function doExecute()
{
if ($this->getOption('v')) {
$this->out('Class: ' . __CLASS__);
$this->out('Arguments: ' . var_export($this->args, true));
$this->out('Options: ' . var_export($this->options, true));
}
if (count($this->args) == 0) {
$this->out($this->getHelp());
return 0;
}
if (count($this->args) > 1) {
throw new \Asika\SimpleConsole\CommandArgsException('Too many arguments');
}
$pofile = realpath($this->getArgument(0));
if (!file_exists($pofile)) {
throw new \RuntimeException('Supplied file path doesn\'t exist.');
}
if (!is_writable(dirname($pofile))) {
throw new \RuntimeException('Supplied directory isn\'t writable.');
}
$outfile = dirname($pofile) . DIRECTORY_SEPARATOR . 'strings.php';
if (basename(dirname($pofile)) == 'C') {
$lang = 'en';
} else {
$lang = str_replace('-', '_', basename(dirname($pofile)));
}
$this->out('Out to ' . $outfile);
$out = $this->poFile2Php($lang, $pofile);
if (!file_put_contents($outfile, $out)) {
throw new \RuntimeException('Unable to write to ' . $outfile);
}
return 0;
}
private function poFile2Php($lang, $infile): string
{
$poFile = new PoFile();
$poFile->readPoFile($infile);
$out = "<?php\n\n";
$pluralForms = $poFile->getHeaderEntry()->getHeader('plural-forms');
if (!$pluralForms) {
throw new \RuntimeException('No Plural-Forms header detected');
}
$regex = 'nplurals=([0-9]*); *plural=(.*?)[\\\\;]';
if (!preg_match('|' . $regex . '|', $pluralForms, $match)) {
throw new \RuntimeException('Unexpected Plural-Forms header value, expected "' . $regex . '", found ' . $pluralForms);
}
$out .= $this->createPluralSelectFunctionString($match[2], $lang);
foreach ($poFile->getEntries() as $entry) {
if (!implode('', $entry->getAsStringArray(PoTokens::TRANSLATED))) {
// Skip completely untranslated entries
continue;
}
$out .= '$a->strings[' . self::escapePhpString($entry->getAsString(PoTokens::MESSAGE)) . '] = ';
$msgid_plural = $entry->get(PoTokens::PLURAL);
if (empty($msgid_plural)) {
$out .= self::escapePhpString($entry->getAsString(PoTokens::TRANSLATED)) . ';' . "\n";
} else {
$out .= '[' . "\n";
foreach($entry->getAsStringArray(PoTokens::TRANSLATED) as $key => $msgstr) {
$out .= "\t" . $key . ' => ' . self::escapePhpString($msgstr) . ',' . "\n";
};
$out .= '];' . "\n";
}
}
return $out;
}
private function createPluralSelectFunctionString(string $pluralForms, string $lang): string
{
$return = $this->convertCPluralConditionToPhpReturnStatement(
$pluralForms
);
$fnname = 'string_plural_select_' . $lang;
$out = 'if(! function_exists("' . $fnname . '")) {' . "\n";
$out .= 'function ' . $fnname . '($n){' . "\n";
$out .= ' $n = intval($n);' . "\n";
$out .= ' ' . $return . "\n";
$out .= '}}' . "\n";
return $out;
}
private static function escapePhpString($string): string
{
return "'" . strtr($string, ['\'' => '\\\'']) . "'";
}
/**
* Converts C-style plural condition in .po files to a PHP-style plural return statement
*
* Adapted from https://github.com/friendica/friendica/issues/9747#issuecomment-769604485
* Many thanks to Christian Archer (https://github.com/sunchaserinfo)
*
* @param string $cond
* @return string
*/
private function convertCPluralConditionToPhpReturnStatement(string $cond)
{
$cond = str_replace('n', '$n', $cond);
$tree = [];
self::parse($cond, $tree);
return is_string($tree) ? "return intval({$tree});" : self::render($tree);
}
/**
* Parses the condition into an array if there's at least a ternary operator, to a string otherwise
*
* Warning: Black recursive magic
*
* @param string $string
* @param array|string $node
*/
private static function parse(string $string, &$node = [])
{
// Removes extra outward parentheses
if (strpos($string, '(') === 0 && strrpos($string, ')') === strlen($string) - 1) {
$string = substr($string, 1, -1);
}
$q = strpos($string, '?');
$s = strpos($string, ':');
if ($q === false && $s === false) {
$node = $string;
return;
}
if ($q === false || $s < $q) {
list($then, $else) = explode(':', $string, 2);
$node['then'] = $then;
$parsedElse = [];
self::parse($else, $parsedElse);
$node['else'] = $parsedElse;
} else {
list($if, $thenelse) = explode('?', $string, 2);
$node['if'] = $if;
self::parse($thenelse, $node);
}
}
/**
* Renders the parsed condition tree into a return statement
*
* Warning: Black recursive magic
*
* @param $tree
* @return string
*/
private static function render($tree): string
{
if (is_array($tree)) {
$if = trim($tree['if']);
$then = trim($tree['then']);
$else = self::render($tree['else']);
return "if ({$if}) { return {$then}; } else {$else}";
}
$tree = trim($tree);
return " { return {$tree}; }";
}
}