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<?php namespace Fisharebest\Localization; |
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/** |
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* Class Translation - a set of translated messages, such as a .MO file. |
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* |
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* @author Greg Roach <[email protected]> |
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* @copyright (c) 2018 Greg Roach |
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* @license GPLv3+ |
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*/ |
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class Translation |
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{ |
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// Constants for processing .MO files |
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const MO_MAGIC_LITTLE_ENDIAN = '950412de'; |
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const MO_MAGIC_BIG_ENDIAN = 'de120495'; |
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const PACK_LITTLE_ENDIAN = 'V'; |
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const PACK_BIG_ENDIAN = 'N'; |
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/** @var array An association of English -> translated messages */ |
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private $translations; |
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/** |
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* The code for this variant. |
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* |
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* @param string $filename |
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*/ |
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public function __construct($filename) |
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{ |
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$this->translations = array(); |
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switch (strtolower(pathinfo($filename, PATHINFO_EXTENSION))) { |
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case 'csv': |
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$fp = fopen($filename, 'r'); |
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if ($fp) { |
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while (($data = fgetcsv($fp, 0, ';')) !== false) { |
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$this->translations[$data[0]] = $data[1]; |
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} |
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fclose($fp); |
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} |
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break; |
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case 'mo': |
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$fp = fopen($filename, 'rb'); |
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if ($fp) { |
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$this->readMoFile($fp); |
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fclose($fp); |
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} |
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break; |
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case 'php': |
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$translations = include $filename; |
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if (is_array($translations)) { |
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$this->translations = $translations; |
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} |
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break; |
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} |
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} |
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/** |
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* The translation strings |
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* |
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* @return array |
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*/ |
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public function asArray() |
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{ |
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return $this->translations; |
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} |
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/** |
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* Read specific binary data (32 bit words) from a .MO file |
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* |
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* @param resource $fp |
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* @param int $offset |
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* @param int $count |
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* @param string $pack "N" for big-endian, "V" for little-endian |
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* |
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* @return int[] |
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*/ |
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private function readMoWords($fp, $offset, $count, $pack) |
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{ |
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fseek($fp, $offset); |
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return unpack($pack . $count, fread($fp, $count * 4)); |
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} |
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/** |
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* Read and parse a .MO (gettext) file |
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* |
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* @link https://www.gnu.org/software/gettext/manual/html_node/MO-Files.html |
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* |
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* @param resource $fp |
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* |
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* @return void |
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*/ |
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private function readMoFile($fp) |
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{ |
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// How is the numeric data packed in the .MO file? |
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$magic = $this->readMoWords($fp, 0, 1, self::PACK_LITTLE_ENDIAN); |
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switch (dechex($magic[1])) { |
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case self::MO_MAGIC_LITTLE_ENDIAN: |
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$pack = self::PACK_LITTLE_ENDIAN; |
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break; |
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case self::MO_MAGIC_BIG_ENDIAN: |
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$pack = self::PACK_BIG_ENDIAN; |
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break; |
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default: |
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// Not a valid .MO file. |
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throw new \InvalidArgumentException('Invalid .MO file'); |
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} |
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// Read the lookup tables |
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list(, $number_of_strings, $offset_original, $offset_translated) = $this->readMoWords($fp, 8, 3, $pack); |
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$lookup_original = $this->readMoWords($fp, $offset_original, $number_of_strings * 2, $pack); |
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$lookup_translated = $this->readMoWords($fp, $offset_translated, $number_of_strings * 2, $pack); |
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// Read the strings |
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for ($n = 1; $n < $number_of_strings; ++$n) { |
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fseek($fp, $lookup_original[$n * 2 + 2]); |
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$original = fread($fp, $lookup_original[$n * 2 + 1]); |
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fseek($fp, $lookup_translated[$n * 2 + 2]); |
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$translated = fread($fp, $lookup_translated[$n * 2 + 1]); |
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$this->translations[$original] = $translated; |
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} |
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} |
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} |
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fisharebest /
localization
