287 lines
9.9 KiB
PHP
Executable file
287 lines
9.9 KiB
PHP
Executable file
<?php #
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if (IN_serendipity !== true) {
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die ("Don't hack!");
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}
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@serendipity_plugin_api::load_language(dirname(__FILE__));
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class serendipity_event_autotitle extends serendipity_event
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{
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var $title = PLUGIN_EVENT_AUTOTITLE_NAME;
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var $cache = null;
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var $cache_group = 'serendipity_autotitle';
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var $cache_key = '';
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var $page_charset;
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function introspect(&$propbag)
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{
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global $serendipity;
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$propbag->add('name', PLUGIN_EVENT_AUTOTITLE_NAME);
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$propbag->add('description', PLUGIN_EVENT_AUTOTITLE_DESC);
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$propbag->add('stackable', false);
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$propbag->add('author', 'Malte Paskuda');
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$propbag->add('version', '0.1.13');
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$propbag->add('requirements', array(
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'php' => '4.1.0'
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));
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$propbag->add('cachable_events', array('frontend_display' => true));
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$propbag->add('event_hooks', array('frontend_display' => true));
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$propbag->add('groups', array('MARKUP'));
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$this->markup_elements = array(
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array(
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'name' => 'ENTRY_BODY',
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'element' => 'body',
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),
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array(
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'name' => 'EXTENDED_BODY',
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'element' => 'extended',
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),
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array(
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'name' => 'COMMENT',
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'element' => 'comment',
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),
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array(
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'name' => 'HTML_NUGGET',
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'element' => 'html_nugget',
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)
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);
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$conf_array = array('fetchlimit');
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foreach($this->markup_elements as $element) {
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$conf_array[] = $element['name'];
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}
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$propbag->add('configuration', $conf_array);
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}
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function install() {
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function uninstall(&$propbag) {
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serendipity_plugin_api::hook_event('backend_cache_purge', $this->title);
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function generate_content(&$title) {
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$title = $this->title;
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}
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function introspect_config_item($name, &$propbag)
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{
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switch($name) {
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case 'fetchlimit':
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$propbag->add('type', 'string');
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$propbag->add('name', PLUGIN_EVENT_AUTOTITLE_FETCHLIMIT);
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$propbag->add('description', PLUGIN_EVENT_AUTOTITLE_FETCHLIMIT_DESC);
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$propbag->add('default', '4');
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break;
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default:
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$propbag->add('type', 'boolean');
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$propbag->add('name', constant($name));
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$propbag->add('description', sprintf(APPLY_MARKUP_TO, constant($name)));
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$propbag->add('default', 'true');
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}
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return true;
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}
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function event_hook($event, &$bag, &$eventData, $addData = null) {
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global $serendipity;
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$hooks = &$bag->get('event_hooks');
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if (isset($hooks[$event])) {
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switch($event) {
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case 'frontend_display':
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foreach ($this->markup_elements as $temp) {
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if (serendipity_db_bool($this->get_config($temp['name'], true)) && isset($eventData[$temp['element']]) &&
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!$eventData['properties']['ep_disable_markup_' . $this->instance] &&
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!in_array($this->instance, (array)$serendipity['POST']['properties']['disable_markups'])) {
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@include_once 'Cache/Lite.php';
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if (!class_exists('Cache_Lite')) {
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$this->debugMsg('Cache_Lite not available.');
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return false;
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}
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$options = array(
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'cacheDir' => $serendipity['serendipityPath'] . 'templates_c/',
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'lifeTime' => 604800, //one week
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'hashedDirectoryLevel' => 2,
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'automaticCleaningFactor' => 200
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);
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$this->cache = new Cache_Lite($options);
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$element = $temp['element'];
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$eventData[$element] = $this->autotitle($eventData[$element]);
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}
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}
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return true;
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break;
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default:
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return false;
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}
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} else {
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return false;
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}
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}
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/**
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* Get the title-tag of every linked site
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* */
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function autotitle($text) {
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global $serendipity;
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//get all links
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preg_match_all('|<a (.*?)\">|is', $text, $links);
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//links could exist twice in links-array
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$links = array_unique($links[1]);
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$offset = 0;
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while (true) {
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preg_match('|<a (.*?)\">|is', $text, $links,
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PREG_OFFSET_CAPTURE, $offset);
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if (empty($links[0])) {
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break;
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} else {
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$link = $links[1][0];
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$offset = $links[1][1] + 1;
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}
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//ignore this link if title already set
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if (strpos($link, 'title=') !== false) {
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continue;
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}
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//if href is alone, last " is missing
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if (substr($link, strlen($link), 1) != '"') {
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$link = $link .'"';
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}
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//grab the real url
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preg_match('|href="([^\"]*?)"|is', $link, $url);
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$url = $url[1];
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if (empty($url)) {
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continue;
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}
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//prepare cache:
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$this->cache->_setFileName($url, $this->cache_group);
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//check cache:
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$title = $this->get_cached_title($url);
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if ($title === false) {
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//$page = a maximum of the first 4kb of the linked site
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$page = $this->getPage($url);
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//fetch everything between <title>, only one is allowed
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preg_match('|<title>([^<]*?)</title>|is', $page, $title);
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$page_charset = $this->getCharset($page);
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//we need smarty to get our own charset :/
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if (!is_object($serendipity['smarty'])) {
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serendipity_smarty_init();
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}
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if( !defined('Smarty::SMARTY_VERSION') ) {
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//handle with Smarty version 2
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$own_charset = $serendipity['smarty']->get_template_vars('head_charset');
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} else {
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//handle with Smarty version 3 ...
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$own_charset = $serendipity['smarty']->tpl_vars['head_charset']->value;
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}
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//remove newlines to prevent issues with inserted brs by nl2br or textile
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//1. Standardize line endings:
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// DOS to Unix and Mac to Unix
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$title = str_replace(array("\r\n", "\r"), "\n", $title[1]);
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//2. remove nl, also \t because it looks like crap
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$title = str_replace(array("\n", "\t"), '', $title);
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//escape and convert to prevent encoding-errors
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$title = htmlspecialchars(
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iconv("$page_charset", "$own_charset//TRANSLIT", $title)
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, ENT_COMPAT, $own_charset, false);
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$this->cache_title($url, $title);
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}
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//insert title in links
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$titled_link = "$link title=\"$title\"";
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//strip text in two parts at the linkposition so str_replace
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//wont insert the link which have a title, but have this link
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//as a part (e.g. <a href=".*">, <a href=".*" class="x">
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$firstPart = substr($text, 0, $offset-5);
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$secondPart = substr($text, $offset-5);
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$secondPart = str_replace("<a $link", "<a $titled_link", $secondPart);
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$text = $firstPart . $secondPart;
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}
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return $text;
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}
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function getPage($url) {
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$fetchlimit = $this->get_config('fetchlimit', 4);
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if(is_int($fetchlimit)) {
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$fetchlimit = $fetchlimit * 1024;
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} else {
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$fetchlimit = 4096;
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}
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$page = @file_get_contents($url, 0, null, -1, $fetchlimit);
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if (empty($page)) {
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//try it again with curl if fopen was forbidden
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if (function_exists('curl_init')) {
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_RANGE, "0-$fetchlimits");
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//the range isn't properly working. So the timeout shall hinder the worst
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//that's why curl is not the default
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curl_setopt($ch, CURLOPT_TIMEOUT, "20");
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$page = curl_exec($ch);
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curl_close($ch);
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}
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}
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return $page;
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}
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function getCharset($page) {
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preg_match( '@<meta\s+http-equiv="Content-Type"\s+content="([\w/]+)(;\s+charset=([^\s"]+))?@i', $page, $matches );
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if (isset($matches[3])) {
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return $matches[3];
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} else {
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return 'UTF-8';
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}
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}
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function get_cached_title($url) {
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return $this->cache->get($url, $this->cache_group);
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}
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function cache_title($url, $title) {
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return $this->cache->save($title, $url, $this->cache_group);
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}
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function debugMsg($msg) {
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global $serendipity;
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$this->debug_fp = @fopen ( $serendipity ['serendipityPath'] . 'templates_c/autotitle.log', 'a' );
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if (! $this->debug_fp) {
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return false;
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}
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if (empty ( $msg )) {
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fwrite ( $this->debug_fp, "failure \n" );
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} else {
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fwrite ( $this->debug_fp, print_r ( $msg, true ) );
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}
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fclose ( $this->debug_fp );
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}
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}
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/* vim: set sts=4 ts=4 expandtab : */
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