<?php

class Qs_Translate_Adapter_Gettext extends Zend_Translate_Adapter_Gettext
{
    protected $_bigEndian = false;
    protected $_file = false;
    protected $_adapterInfo = [];
    protected $_data = [];

    public function __construct($options = [])
    {
        $this->_options['logMessage'] = "%message%";

        parent::__construct($options);
    }

    public function setSection($section)
    {
        $this->_options['section'] = $section;
        return $this;
    }

    public function isSection($section, $locale)
    {
        return (isset($this->_translate[$locale]) && isset($this->_translate[$locale][$section]));
    }

    protected function _loadTranslationData($filename, $locale, array $options = [])
    {
        $this->_bigEndian = false;
        $options = $options + $this->_options;
        $section = str_replace('.mo', '', basename($filename));

        if ($options['clear'] || !isset($this->_translate[$locale])) {
            $this->_translate[$locale] = [$section => []];
        }

        $this->_file = @fopen($filename, 'rb');
        if (!$this->_file) {
            // require_once 'Zend/Translate/Exception.php';
            throw new Zend_Translate_Exception('Error opening translation file \'' . $filename . '\'.');
        }
        if (@filesize($filename) < 10) {
            // require_once 'Zend/Translate/Exception.php';
            throw new Zend_Translate_Exception('\'' . $filename . '\' is not a gettext file');
        }

        // get Endian
        $input = $this->_readMOData(1);
        if (strtolower(substr(dechex($input[1]), -8)) == "950412de") {
            $this->_bigEndian = false;
        } else if (strtolower(substr(dechex($input[1]), -8)) == "de120495") {
            $this->_bigEndian = true;
        } else {
            // require_once 'Zend/Translate/Exception.php';
            throw new Zend_Translate_Exception('\'' . $filename . '\' is not a gettext file');
        }
        // read revision - not supported for now
        $input = $this->_readMOData(1);

        // number of bytes
        $input = $this->_readMOData(1);
        $total = $input[1];

        // number of original strings
        $input = $this->_readMOData(1);
        $OOffset = $input[1];

        // number of translation strings
        $input = $this->_readMOData(1);
        $TOffset = $input[1];

        // fill the original table
        fseek($this->_file, $OOffset);
        $origtemp = $this->_readMOData(2 * $total);
        fseek($this->_file, $TOffset);
        $transtemp = $this->_readMOData(2 * $total);

        for ($count = 0; $count < $total; ++$count) {
            if ($origtemp[$count * 2 + 1] != 0) {
                fseek($this->_file, $origtemp[$count * 2 + 2]);
                $original = @fread($this->_file, $origtemp[$count * 2 + 1]);
            } else {
                $original = '';
            }

            if ($transtemp[$count * 2 + 1] != 0) {
                fseek($this->_file, $transtemp[$count * 2 + 2]);
                $this->_translate[$locale][$section][$original] = fread($this->_file, $transtemp[$count * 2 + 1]);
            }
        }

        $this->_translate[$locale][$section][''] = trim($this->_translate[$locale][$section]['']);
        if (empty($this->_translate[$locale][$section][''])) {
            $this->_adapterInfo[$filename] = 'No adapter information available';
        } else {
            $this->_adapterInfo[$filename] = $this->_translate[$locale][$section][''];
        }

        unset($this->_translate[$locale][$section]['']);
    }

    protected function _readMOData($bytes)
    {
        if ($this->_bigEndian === false) {
            return unpack('V' . $bytes, fread($this->_file, 4 * $bytes));
        } else {
            return unpack('N' . $bytes, fread($this->_file, 4 * $bytes));
        }
    }

    public function translate($messageId, $locale = null)
    {
        if ($locale === null) {
            $locale = $this->_options['locale'];
        }
        $section = Qs_Array::get($this->_options, 'section', 'common');
        if (!Zend_Locale::isLocale($locale, true, false)) {
            if (!Zend_Locale::isLocale($locale, false, false)) {
                // language does not exist, return original string
                return $messageId;
            }
            $locale = new Zend_Locale($locale);
        }

        $locale = (string) $locale;

        if (isset($this->_translate[$locale][$section][$messageId]) === true) {
            // return original translation
            return $this->_translate[$locale][$section][$messageId];
        } else if ($section != 'common' && isset($this->_translate[$locale]['common'][$messageId]) === true) {
            return $this->_translate[$locale]['common'][$messageId];
        } else if (strlen($locale) != 2) {
            // faster than creating a new locale and separate the leading part
            $locale = substr($locale, 0, -strlen(strrchr($locale, '_')));

            if (isset($this->_translate[$locale][$section][$messageId]) === true) {
                // return regionless translation (en_US -> en)
                return $this->_translate[$locale][$section][$messageId];
            } else if ($section != 'common' && isset($this->_translate[$locale]['common'][$messageId]) === true) {
                return $this->_translate[$locale]['common'][$messageId];
            }
        }

        $this->_log($messageId, $locale);

        // no translation found, return original
        return $messageId;
    }

    public function isTranslated($messageId, $original = false, $locale = null)
    {
        $section = $this->_options['section'];
        if (($original !== false) and ($original !== true)) {
            $locale = $original;
            $original = false;
        }

        if ($locale === null) {
            $locale = $this->_options['locale'];
        }

        if (!Zend_Locale::isLocale($locale, true, false)) {
            if (!Zend_Locale::isLocale($locale, false, false)) {
                // language does not exist, return original string
                $this->_log($messageId, $locale);
                return false;
            }

            $locale = new Zend_Locale();
        }

        $locale = (string) $locale;
        if (isset($this->_translate[$locale][$section][$messageId]) === true) {
            // return original translation
            return true;
        } else if ((strlen($locale) != 2) and ($original === false)) {
            // faster than creating a new locale and separate the leading part
            $locale = substr($locale, 0, -strlen(strrchr($locale, '_')));

            if (isset($this->_translate[$locale][$section][$messageId]) === true) {
                // return regionless translation (en_US -> en)
                return true;
            }
        }

        // No translation found, return original
        $this->_log($messageId, $locale);
        return false;
    }
}