<?php
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/**
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| |
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| Copyright (C) 2013, The Roundcube Dev Team |
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| |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| |
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| PURPOSE: |
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| Spellchecking backend implementation for afterthedeadline services |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Spellchecking backend implementation to work with an After the Deadline service
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* See http://www.afterthedeadline.com/ for more information
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*
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* @package Framework
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* @subpackage Utils
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*/
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class rcube_spellcheck_atd extends rcube_spellcheck_engine
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{
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const SERVICE_HOST = 'service.afterthedeadline.com';
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const SERVICE_PORT = 80;
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private $matches = array();
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private $content;
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private $langhosts = array(
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'fr' => 'fr.',
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'de' => 'de.',
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'pt' => 'pt.',
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'es' => 'es.',
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);
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/**
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* Return a list of languages supported by this backend
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*
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* @see rcube_spellcheck_engine::languages()
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*/
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function languages()
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{
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$langs = array_values($this->langhosts);
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$langs[] = 'en';
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return $langs;
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}
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/**
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* Set content and check spelling
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*
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* @see rcube_spellcheck_engine::check()
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*/
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function check($text)
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{
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$this->content = $text;
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// spell check uri is configured
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$rcube = rcube::get_instance();
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$url = $rcube->config->get('spellcheck_uri');
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$key = $rcube->config->get('spellcheck_atd_key');
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if ($url) {
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$a_uri = parse_url($url);
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$ssl = ($a_uri['scheme'] == 'https' || $a_uri['scheme'] == 'ssl');
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$port = $a_uri['port'] ?: ($ssl ? 443 : 80);
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$host = ($ssl ? 'ssl://' : '') . $a_uri['host'];
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$path = $a_uri['path'] . ($a_uri['query'] ? '?'.$a_uri['query'] : '') . $this->lang;
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}
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else {
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$host = self::SERVICE_HOST;
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$port = self::SERVICE_PORT;
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$path = '/checkDocument';
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// prefix host for other languages than 'en'
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$lang = substr($this->lang, 0, 2);
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if ($this->langhosts[$lang])
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$host = $this->langhosts[$lang] . $host;
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}
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$postdata = 'data=' . urlencode($text);
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if (!empty($key))
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$postdata .= '&key=' . urlencode($key);
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$response = $headers = '';
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$in_header = true;
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if ($fp = fsockopen($host, $port, $errno, $errstr, 30)) {
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$out = "POST $path HTTP/1.0\r\n";
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$out .= "Host: " . str_replace('ssl://', '', $host) . "\r\n";
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$out .= "Content-Length: " . strlen($postdata) . "\r\n";
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$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
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$out .= "Connection: Close\r\n\r\n";
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$out .= $postdata;
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fwrite($fp, $out);
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while (!feof($fp)) {
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if ($in_header) {
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$line = fgets($fp, 512);
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$headers .= $line;
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if (trim($line) == '')
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$in_header = false;
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}
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else {
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$response .= fgets($fp, 1024);
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}
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}
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fclose($fp);
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}
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// parse HTTP response headers
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if (preg_match('!^HTTP/1.\d (\d+)(.+)!', $headers, $m)) {
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$http_status = $m[1];
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if ($http_status != '200')
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$this->error = 'HTTP ' . $m[1] . $m[2];
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}
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if (!$response) {
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$this->error = "Empty result from spelling engine";
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}
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try {
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$result = new SimpleXMLElement($response);
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}
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catch (Exception $e) {
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$this->error = "Unexpected response from server: " . $response;
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return array();
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}
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foreach ($result->error as $error) {
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if (strval($error->type) == 'spelling') {
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$word = strval($error->string);
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// skip exceptions
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if ($this->dictionary->is_exception($word)) {
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continue;
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}
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$prefix = strval($error->precontext);
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$start = $prefix ? mb_strpos($text, $prefix) : 0;
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$pos = mb_strpos($text, $word, $start);
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$len = mb_strlen($word);
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$num = 0;
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$match = array($word, $pos, $len, null, array());
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foreach ($error->suggestions->option as $option) {
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$match[4][] = strval($option);
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if (++$num == self::MAX_SUGGESTIONS)
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break;
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}
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$matches[] = $match;
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}
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}
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$this->matches = $matches;
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return $matches;
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}
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/**
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* Returns suggestions for the specified word
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*
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* @see rcube_spellcheck_engine::get_words()
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*/
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function get_suggestions($word)
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{
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$matches = $word ? $this->check($word) : $this->matches;
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if ($matches[0][4]) {
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return $matches[0][4];
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}
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return array();
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}
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/**
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* Returns misspelled words
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*
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* @see rcube_spellcheck_engine::get_suggestions()
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*/
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function get_words($text = null)
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{
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if ($text) {
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$matches = $this->check($text);
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}
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else {
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$matches = $this->matches;
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$text = $this->content;
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}
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$result = array();
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foreach ($matches as $m) {
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$result[] = mb_substr($text, $m[1], $m[2], RCUBE_CHARSET);
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}
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return $result;
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}
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}
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