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<?php

require_once __DIR__ . '/translations.php';
if (!defined('PO_MAX_LINE_LEN')) {
    define('PO_MAX_LINE_LEN', 79);
}
ini_set('auto_detect_line_endings', 1);
if (!class_exists('PO', false)) {
    class PO extends Gettext_Translations
    {
        public $comments_before_headers = '';
        function export_headers()
        {
            $header_string = '';
            foreach ($this->headers as $header => $value) {
                $header_string .= "{$header}: {$value}\n";
            }
            $poified = PO::poify($header_string);
            if ($this->comments_before_headers) {
                $before_headers = $this->prepend_each_line(rtrim($this->comments_before_headers) . "\n", '# ');
            } else {
                $before_headers = '';
            }
            return rtrim("{$before_headers}msgid \"\"\nmsgstr {$poified}");
        }
        function export_entries()
        {
            return implode("\n\n", array_map(array('PO', 'export_entry'), $this->entries));
        }
        function export($include_headers = true)
        {
            $res = '';
            if ($include_headers) {
                $res .= $this->export_headers();
                $res .= "\n\n";
            }
            $res .= $this->export_entries();
            return $res;
        }
        function export_to_file($filename, $include_headers = true)
        {
            $fh = fopen($filename, 'w');
            if (false === $fh) {
                return false;
            }
            $export = $this->export($include_headers);
            $res = fwrite($fh, $export);
            if (false === $res) {
                return false;
            }
            return fclose($fh);
        }
        function set_comment_before_headers($text)
        {
            $this->comments_before_headers = $text;
        }
        public static function poify($string)
        {
            $quote = '"';
            $slash = '\\';
            $newline = "\n";
            $replaces = array("{$slash}" => "{$slash}{$slash}", "{$quote}" => "{$slash}{$quote}", "\t" => '\\t');
            $string = str_replace(array_keys($replaces), array_values($replaces), $string);
            $po = $quote . implode("{$slash}n{$quote}{$newline}{$quote}", explode($newline, $string)) . $quote;
            if (false !== strpos($string, $newline) && (substr_count($string, $newline) > 1 || substr($string, -strlen($newline)) !== $newline)) {
                $po = "{$quote}{$quote}{$newline}{$po}";
            }
            $po = str_replace("{$newline}{$quote}{$quote}", '', $po);
            return $po;
        }
        public static function unpoify($string)
        {
            $escapes = array('t' => "\t", 'n' => "\n", 'r' => "\r", '\\' => '\\');
            $lines = array_map('trim', explode("\n", $string));
            $lines = array_map(array('PO', 'trim_quotes'), $lines);
            $unpoified = '';
            $previous_is_backslash = false;
            foreach ($lines as $line) {
                preg_match_all('/./u', $line, $chars);
                $chars = $chars[0];
                foreach ($chars as $char) {
                    if (!$previous_is_backslash) {
                        if ('\\' === $char) {
                            $previous_is_backslash = true;
                        } else {
                            $unpoified .= $char;
                        }
                    } else {
                        $previous_is_backslash = false;
                        $unpoified .= isset($escapes[$char]) ? $escapes[$char] : $char;
                    }
                }
            }
            $unpoified = str_replace(array("\r\n", "\r"), "\n", $unpoified);
            return $unpoified;
        }
        public static function prepend_each_line($string, $with)
        {
            $lines = explode("\n", $string);
            $append = '';
            if ("\n" === substr($string, -1) && '' === end($lines)) {
                array_pop($lines);
                $append = "\n";
            }
            foreach ($lines as &$line) {
                $line = $with . $line;
            }
            unset($line);
            return implode("\n", $lines) . $append;
        }
        public static function comment_block($text, $char = ' ')
        {
            $text = wordwrap($text, PO_MAX_LINE_LEN - 3);
            return PO::prepend_each_line($text, "#{$char} ");
        }
        public static function export_entry($entry)
        {
            if (null === $entry->singular || '' === $entry->singular) {
                return false;
            }
            $po = array();
            if (!empty($entry->translator_comments)) {
                $po[] = PO::comment_block($entry->translator_comments);
            }
            if (!empty($entry->extracted_comments)) {
                $po[] = PO::comment_block($entry->extracted_comments, '.');
            }
            if (!empty($entry->references)) {
                $po[] = PO::comment_block(implode(' ', $entry->references), ':');
            }
            if (!empty($entry->flags)) {
                $po[] = PO::comment_block(implode(', ', $entry->flags), ',');
            }
            if ($entry->context) {
                $po[] = 'msgctxt ' . PO::poify($entry->context);
            }
            $po[] = 'msgid ' . PO::poify($entry->singular);
            if (!$entry->is_plural) {
                $translation = empty($entry->translations) ? '' : $entry->translations[0];
                $translation = PO::match_begin_and_end_newlines($translation, $entry->singular);
                $po[] = 'msgstr ' . PO::poify($translation);
            } else {
                $po[] = 'msgid_plural ' . PO::poify($entry->plural);
                $translations = empty($entry->translations) ? array('', '') : $entry->translations;
                foreach ($translations as $i => $translation) {
                    $translation = PO::match_begin_and_end_newlines($translation, $entry->plural);
                    $po[] = "msgstr[{$i}] " . PO::poify($translation);
                }
            }
            return implode("\n", $po);
        }
        public static function match_begin_and_end_newlines($translation, $original)
        {
            if ('' === $translation) {
                return $translation;
            }
            $original_begin = "\n" === substr($original, 0, 1);
            $original_end = "\n" === substr($original, -1);
            $translation_begin = "\n" === substr($translation, 0, 1);
            $translation_end = "\n" === substr($translation, -1);
            if ($original_begin) {
                if (!$translation_begin) {
                    $translation = "\n" . $translation;
                }
            } elseif ($translation_begin) {
                $translation = ltrim($translation, "\n");
            }
            if ($original_end) {
                if (!$translation_end) {
                    $translation .= "\n";
                }
            } elseif ($translation_end) {
                $translation = rtrim($translation, "\n");
            }
            return $translation;
        }
        function import_from_file($filename)
        {
            $f = fopen($filename, 'r');
            if (!$f) {
                return false;
            }
            $lineno = 0;
            while (true) {
                $res = $this->read_entry($f, $lineno);
                if (!$res) {
                    break;
                }
                if ('' === $res['entry']->singular) {
                    $this->set_headers($this->make_headers($res['entry']->translations[0]));
                } else {
                    $this->add_entry($res['entry']);
                }
            }
            PO::read_line($f, 'clear');
            if (false === $res) {
                return false;
            }
            if (!$this->headers && !$this->entries) {
                return false;
            }
            return true;
        }
        protected static function is_final($context)
        {
            return 'msgstr' === $context || 'msgstr_plural' === $context;
        }
        function read_entry($f, $lineno = 0)
        {
            $entry = new Translation_Entry();
            $context = '';
            $msgstr_index = 0;
            while (true) {
                $lineno++;
                $line = PO::read_line($f);
                if (!$line) {
                    if (feof($f)) {
                        if (self::is_final($context)) {
                            break;
                        } elseif (!$context) {
                            return null;
                        } else {
                            return false;
                        }
                    } else {
                        return false;
                    }
                }
                if ("\n" === $line) {
                    continue;
                }
                $line = trim($line);
                if (preg_match('/^#/', $line, $m)) {
                    if (self::is_final($context)) {
                        PO::read_line($f, 'put-back');
                        $lineno--;
                        break;
                    }
                    if ($context && 'comment' !== $context) {
                        return false;
                    }
                    $this->add_comment_to_entry($entry, $line);
                } elseif (preg_match('/^msgctxt\\s+(".*")/', $line, $m)) {
                    if (self::is_final($context)) {
                        PO::read_line($f, 'put-back');
                        $lineno--;
                        break;
                    }
                    if ($context && 'comment' !== $context) {
                        return false;
                    }
                    $context = 'msgctxt';
                    $entry->context .= PO::unpoify($m[1]);
                } elseif (preg_match('/^msgid\\s+(".*")/', $line, $m)) {
                    if (self::is_final($context)) {
                        PO::read_line($f, 'put-back');
                        $lineno--;
                        break;
                    }
                    if ($context && 'msgctxt' !== $context && 'comment' !== $context) {
                        return false;
                    }
                    $context = 'msgid';
                    $entry->singular .= PO::unpoify($m[1]);
                } elseif (preg_match('/^msgid_plural\\s+(".*")/', $line, $m)) {
                    if ('msgid' !== $context) {
                        return false;
                    }
                    $context = 'msgid_plural';
                    $entry->is_plural = true;
                    $entry->plural .= PO::unpoify($m[1]);
                } elseif (preg_match('/^msgstr\\s+(".*")/', $line, $m)) {
                    if ('msgid' !== $context) {
                        return false;
                    }
                    $context = 'msgstr';
                    $entry->translations = array(PO::unpoify($m[1]));
                } elseif (preg_match('/^msgstr\\[(\\d+)\\]\\s+(".*")/', $line, $m)) {
                    if ('msgid_plural' !== $context && 'msgstr_plural' !== $context) {
                        return false;
                    }
                    $context = 'msgstr_plural';
                    $msgstr_index = $m[1];
                    $entry->translations[$m[1]] = PO::unpoify($m[2]);
                } elseif (preg_match('/^".*"$/', $line)) {
                    $unpoified = PO::unpoify($line);
                    switch ($context) {
                        case 'msgid':
                            $entry->singular .= $unpoified;
                            break;
                        case 'msgctxt':
                            $entry->context .= $unpoified;
                            break;
                        case 'msgid_plural':
                            $entry->plural .= $unpoified;
                            break;
                        case 'msgstr':
                            $entry->translations[0] .= $unpoified;
                            break;
                        case 'msgstr_plural':
                            $entry->translations[$msgstr_index] .= $unpoified;
                            break;
                        default:
                            return false;
                    }
                } else {
                    return false;
                }
            }
            $have_translations = false;
            foreach ($entry->translations as $t) {
                if ($t || '0' === $t) {
                    $have_translations = true;
                    break;
                }
            }
            if (false === $have_translations) {
                $entry->translations = array();
            }
            return array('entry' => $entry, 'lineno' => $lineno);
        }
        function read_line($f, $action = 'read')
        {
            static $last_line = '';
            static $use_last_line = false;
            if ('clear' === $action) {
                $last_line = '';
                return true;
            }
            if ('put-back' === $action) {
                $use_last_line = true;
                return true;
            }
            $line = $use_last_line ? $last_line : fgets($f);
            $line = "\r\n" === substr($line, -2) ? rtrim($line, "\r\n") . "\n" : $line;
            $last_line = $line;
            $use_last_line = false;
            return $line;
        }
        function add_comment_to_entry(&$entry, $po_comment_line)
        {
            $first_two = substr($po_comment_line, 0, 2);
            $comment = trim(substr($po_comment_line, 2));
            if ('#:' === $first_two) {
                $entry->references = array_merge($entry->references, preg_split('/\\s+/', $comment));
            } elseif ('#.' === $first_two) {
                $entry->extracted_comments = trim($entry->extracted_comments . "\n" . $comment);
            } elseif ('#,' === $first_two) {
                $entry->flags = array_merge($entry->flags, preg_split('/,\\s*/', $comment));
            } else {
                $entry->translator_comments = trim($entry->translator_comments . "\n" . $comment);
            }
        }
        public static function trim_quotes($s)
        {
            if ('"' === substr($s, 0, 1)) {
                $s = substr($s, 1);
            }
            if ('"' === substr($s, -1, 1)) {
                $s = substr($s, 0, -1);
            }
            return $s;
        }
    }
}