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<?php
/**
 * $Id: editor_plugin_src.js 201 2007-02-12 15:56:56Z spocke $
 *
 * @package MCManager.includes
 * @author Moxiecode
 * @copyright Copyright � 2004-2007, Moxiecode Systems AB, All rights reserved.
 */

class GoogleSpell extends SpellChecker {
	/**
	 * Spellchecks an array of words.
	 *
	 * @param {String} $lang Language code like sv or en.
	 * @param {Array} $words Array of words to spellcheck.
	 * @return {Array} Array of misspelled words.
	 */
	function &checkWords($lang, $words) {
		$wordstr = implode(' ', $words);
		$matches = $this->_getMatches($lang, $wordstr);
		$words = array();

for ($i=0; $i<count($matches); $i++)
			$words[] = $this->_unhtmlentities(mb_substr($wordstr, $matches[$i][1], $matches[$i][2], "UTF-8"));

return $words;
	}

/**
	 * Returns suggestions of for a specific word.
	 *
	 * @param {String} $lang Language code like sv or en.
	 * @param {String} $word Specific word to get suggestions for.
	 * @return {Array} Array of suggestions for the specified word.
	 */
	function &getSuggestions($lang, $word) {
		$sug = array();
		$osug = array();
		$matches = $this->_getMatches($lang, $word);

if (count($matches) > 0)
			$sug = explode("\t", $this->_unhtmlentities($matches[0][4]));

// Remove empty
		foreach ($sug as $item) {
			if ($item)
				$osug[] = $item;
		}

return $osug;
	}

function &_getMatches($lang, $str) {
		$lang = preg_replace('/[^a-z\-]/i', '', $lang); // Sanitize, remove everything but a-z or -
		$str = preg_replace('/[\x00-\x1F\x7F]/', '', $str); // Sanitize, remove all control characters
		$server = "www.google.com";
		$port = 443;
		$path = "/tbproxy/spell?lang=" . $lang . "&hl=en";
		$host = "www.google.com";
		$url = "https://" . $server;

// Setup XML request
		$xml = '<?xml version="1.0" encoding="utf-8" ?><spellrequest textalreadyclipped="0" ignoredups="0" ignoredigits="1" ignoreallcaps="1"><text>' . $str . '</text></spellrequest>';

$header  = "POST ".$path." HTTP/1.0 \r\n";
		$header .= "MIME-Version: 1.0 \r\n";
		$header .= "Content-type: application/PTI26 \r\n";
		$header .= "Content-length: ".strlen($xml)." \r\n";
		$header .= "Content-transfer-encoding: text \r\n";
		$header .= "Request-number: 1 \r\n";
		$header .= "Document-type: Request \r\n";
		$header .= "Interface-Version: Test 1.4 \r\n";
		$header .= "Connection: close \r\n\r\n";
		$header .= $xml;

// Use curl if it exists
		if (function_exists('curl_init')) {
			// Use curl
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_URL,$url);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $header);
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
			if (!empty($this->_config['GoogleSpell.proxyhost'])) {
				if (!empty($this->_config['GoogleSpell.proxytype']) and ($this->_config['GoogleSpell.proxytype'] === 'SOCKS5')) {
                    curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
				} else {
                    curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTML);
                    curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, FALSE);
                }
				if (empty($this->_config['GoogleSpell.proxyport'])) {
					curl_setopt($ch, CURLOPT_PROXY, $this->_config['GoogleSpell.proxyhost']);
				} else {
					curl_setopt($ch, CURLOPT_PROXY, $this->_config['GoogleSpell.proxyhost'].':'.$this->_config['GoogleSpell.proxyport']);
				}
				if (!empty($this->_config['GoogleSpell.proxyuser']) and !empty($this->_config['GoogleSpell.proxypassword'])) {
					curl_setopt($ch, CURLOPT_PROXYUSERPWD, $this->_config['GoogleSpell.proxyuser'].':'.$this->_config['GoogleSpell.proxypassword']);
					if (defined('CURLOPT_PROXYAUTH')) {
						// any proxy authentication if PHP 5.1
						curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
					}
				}
			}
			$xml = curl_exec($ch);
			curl_close($ch);
		} else {
			// Use raw sockets
			$fp = fsockopen("ssl://" . $server, $port, $errno, $errstr, 30);
			if ($fp) {
				// Send request
				fwrite($fp, $header);

// Read response
				$xml = "";
				while (!feof($fp))
					$xml .= fgets($fp, 128);

fclose($fp);
			} else
				echo "Could not open SSL connection to google.";
		}

// Grab and parse content
		$matches = array();
		preg_match_all('/<c o="([^"]*)" l="([^"]*)" s="([^"]*)">([^<]*)<\/c>/', $xml, $matches, PREG_SET_ORDER);

return $matches;
	}

function _unhtmlentities($string) {
        return core_text::entities_to_utf8($string); // Moodle hack
		$string = preg_replace('~&#x([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $string);
		$string = preg_replace('~&#([0-9]+);~e', 'chr(\\1)', $string);

$trans_tbl = get_html_translation_table(HTML_ENTITIES);
		$trans_tbl = array_flip($trans_tbl);

return strtr($string, $trans_tbl);
	}
}

// Patch in multibyte support
if (!function_exists('mb_substr')) {
	function mb_substr($str, $start, $len = '', $encoding="UTF-8"){
		$limit = strlen($str);

for ($s = 0; $start > 0;--$start) {// found the real start
			if ($s >= $limit)
				break;

if ($str[$s] <= "\x7F")
				++$s;
			else {
				++$s; // skip length

while ($str[$s] >= "\x80" && $str[$s] <= "\xBF")
					++$s;
			}
		}

if ($len == '')
			return substr($str, $s);
		else
			for ($e = $s; $len > 0; --$len) {//found the real end
				if ($e >= $limit)
					break;

if ($str[$e] <= "\x7F")
					++$e;
				else {
					++$e;//skip length

while ($str[$e] >= "\x80" && $str[$e] <= "\xBF" && $e < $limit)
						++$e;
				}
			}

return substr($str, $s, $e - $s);
	}
}