Extractor.php

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<?php
 
namespace Gettext\Extractors;
 
use Exception;
use InvalidArgumentException;
use Gettext\Translations;
 
abstract class Extractor
{
    public static function fromFile($file, Translations $translations = null)
    {
        if ($translations === null) {
            $translations = new Translations();
        }
 
        foreach (self::getFiles($file) as $file) {
            static::fromString(self::readFile($file), $translations, $file);
        }
 
        return $translations;
    }
 
    protected static function getFiles($file)
    {
        if (empty($file)) {
            throw new InvalidArgumentException('There is not any file defined');
        }
 
        if (is_string($file)) {
            if (!is_file($file)) {
                throw new InvalidArgumentException("'$file' is not a valid file");
            }
 
            if (!is_readable($file)) {
                throw new InvalidArgumentException("'$file' is not a readable file");
            }
 
            return array($file);
        }
 
        if (is_array($file)) {
            $files = array();
 
            foreach ($file as $f) {
                $files = array_merge($files, self::getFiles($f));
            }
 
            return $files;
        }
 
        throw new InvalidArgumentException('The first argumet must be string or array');
    }
 
    protected static function readFile($file)
    {
        $length = filesize($file);
 
        if (!($fd = fopen($file, 'rb'))) {
            throw new Exception("Cannot read the file '$file', probably permissions");
        }
 
        $content = $length ? fread($fd, $length) : '';
        fclose($fd);
 
        return $content;
    }
}