280 lines
10 KiB
PHP
280 lines
10 KiB
PHP
<?php
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/**********************************/
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/* Authored by Tom Sommer, 2004 */
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/**********************************/
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if (IN_serendipity !== true) { die ("Don't hack!"); }
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@serendipity_plugin_api::load_language(dirname(__FILE__));
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class serendipity_event_searchhighlight extends serendipity_event
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{
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var $title = PLUGIN_EVENT_SEARCHHIGHLIGHT_NAME;
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function introspect(&$propbag)
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{
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global $serendipity;
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$propbag->add('name', PLUGIN_EVENT_SEARCHHIGHLIGHT_NAME);
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$propbag->add('description', PLUGIN_EVENT_SEARCHHIGHLIGHT_DESC);
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$propbag->add('stackable', false);
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$propbag->add('author', 'Tom Sommer');
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$propbag->add('version', '1.8.2');
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$propbag->add('requirements', array(
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'serendipity' => '1.6',
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'smarty' => '2.6.7',
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'php' => '4.1.0'
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));
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$propbag->add('event_hooks', array('frontend_display' => true, 'css' => true));
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$propbag->add('groups', array('FRONTEND_EXTERNAL_SERVICES'));
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$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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array(
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'name' => 'PLUGIN_EVENT_SEARCHHIGHLIGHT_STATICPAGE',
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'element' => 'content',
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)
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);
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$conf_array = array();
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foreach($this->markup_elements as $element) {
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$conf_array[] = $element['name'];
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}
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$propbag->add('configuration', $conf_array);
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}
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function generate_content(&$title) {
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$title = $this->title;
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}
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function introspect_config_item($name, &$propbag)
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{
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$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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$propbag->add('default', 'true');
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return true;
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}
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function loadConstants() {
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_NONE', 0);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_GOOGLE', 1);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_YAHOO', 2);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_LYCOS', 3);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_MSN', 4);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_ALTAVISTA', 5);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_AOL_DE', 6);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_AOL_COM', 7);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_BING', 8);
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define('PLUGIN_EVENT_SEARCHHIGHLIGHT_S9Y', 9);
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}
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function getSearchEngine() {
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$url = parse_url($this->uri);
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/* Patterns should be placed in the order in which they are most likely to occur */
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if ( preg_match('@^(www\.)?google\.@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_GOOGLE;
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}
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if ( preg_match('@^search\.yahoo\.@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_YAHOO;
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}
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if ( preg_match('@^search\.lycos\.@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_LYCOS;
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}
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if ( preg_match('@^search\.msn\.@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_MSN;
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}
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if ( preg_match('@^(www\.)?altavista\.@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_ALTAVISTA;
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}
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if ( preg_match('@^suche\.aol\.de@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_AOL_DE;
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}
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if ( preg_match('@^search\.aol\.com@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_AOL_COM;
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}
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if ( preg_match('@^(www\.)?bing\.@i', $url['host']) ) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_BING;
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}
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if (!empty($_SESSION['search_referer']) && $this->uri != $_SESSION['search_referer']) {
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$this->uri = $_SESSION['search_referer'];
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return $this->getSearchEngine();
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}
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if ($url['host'] == $_SERVER['HTTP_HOST']) {
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return PLUGIN_EVENT_SEARCHHIGHLIGHT_S9Y;
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}
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return false;
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}
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function getQuery() {
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global $serendipity;
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if ( empty($this->uri) ) {
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return false;
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}
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$this->loadConstants();
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$url = parse_url($this->uri);
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parse_str($url['query'], $pStr);
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$s = $this->getSearchEngine();
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switch ( $s ) {
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_S9Y:
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$query = $pStr['serendipity']['searchTerm'];
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if (!empty($_REQUEST['serendipity']['searchTerm'])) {
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$query = $_REQUEST['serendipity']['searchTerm'];
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}
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if (!empty($serendipity['GET']['searchTerm'])) {
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$query = $serendipity['GET']['searchTerm'];
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}
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/* highlight selected static page, if not having a ['GET']['searchTerm'] REQUEST, but coming from a /search/ referrer */
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if(empty($query)) {
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// look out for path or query depending mod_rewrite setting
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$urlpath = (($serendipity['rewrite'] == 'rewrite') ? parse_url($_SERVER['HTTP_REFERER'], PHP_URL_PATH)
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: parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY)
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);
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if ( strpos($urlpath, 'search/') ) {
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$urlpath = (function_exists('serendipity_specialchars') ? serendipity_specialchars(strip_tags($urlpath)) : htmlspecialchars(strip_tags($urlpath), ENT_COMPAT, LANG_CHARSET)); // avoid spoofing
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$path = explode('/', urldecode($urlpath)); // split and decode non ASCII
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$query = $path[(array_search('search', $path)+1)];
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}
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}
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break;
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_MSN :
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_BING :
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_AOL_DE :
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_ALTAVISTA :
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_GOOGLE :
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$query = $pStr['q'];
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break;
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_YAHOO :
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$query = $pStr['p'];
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break;
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_AOL_COM :
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case PLUGIN_EVENT_SEARCHHIGHLIGHT_LYCOS :
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$query = $pStr['query'];
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break;
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default:
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if ($_REQUEST['serendipity']['searchTerm'] != '') {
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$query = $_REQUEST['serendipity']['searchTerm'];
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} else {
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return false;
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}
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}
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/* Clean the query */
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$query = trim($query);
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if (empty($query)) return false;
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$query = preg_replace('/(\"|\')/i', '', $query);
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/* Split by search engine chars or spaces */
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$words = preg_split('/[\s\,\+\.\-\/\=]+/', $query);
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/* Strip search engine keywords or common words we don't bother to highlight */
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$words = array_diff($words, array('AND', 'OR', 'FROM', 'IN'));
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return $words;
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}
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function event_hook($event, &$bag, &$eventData, $addData = null) {
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global $serendipity;
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$this->uri = $_SERVER['HTTP_REFERER'];
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$hooks = &$bag->get('event_hooks');
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if (!isset($hooks[$event])) {
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return false;
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}
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if ( $event == 'frontend_display' ) {
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if ( ($queries = $this->getQuery()) === false ) {
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return;
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}
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$_SESSION['is_searchengine_visitor'] = true;
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$_SESSION['search_referer'] = $this->uri;
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foreach ($this->markup_elements as $temp) {
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if ( ! (serendipity_db_bool($this->get_config($temp['name'])) && isset($eventData[$temp['element']])) ) {
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continue;
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}
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if ($eventData['properties']['ep_disable_markup_' . $this->instance] ||
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isset($serendipity['POST']['properties']['disable_markup_' . $this->instance])) {
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continue;
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}
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$element = &$eventData[$temp['element']];
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//Iterate over search terms and do the highlighting.
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foreach ( $queries as $word ) {
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if ( strpos($word, '*') ) {
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// fuzzy search (case insensitive) all words containing term;
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$word = str_replace('*', '', $word);
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/* If the data contains HTML tags, we have to be careful not to break URIs and use a more complex preg */
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if ( preg_match('/\<.+\>/', $element) ) {
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$_pattern = '/(?!<.*?)('. preg_quote($word, '/') .')(?![^<>]*?>)/im';
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} else {
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$_pattern = '/('.preg_quote($word, '/').')/im';
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}
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} else {
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/* If the data contains HTML tags, we have to be careful not to break URIs and use a more complex preg */
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if ( preg_match('/\<.+\>/', $element) ) {
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$_pattern = '/(?!<.*?)(\b'. preg_quote($word, '/') .'\b)(?![^<>]*?>)/im';
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} else {
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$_pattern = '/(\b'. preg_quote($word, '/') .'\b)/im';
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}
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}
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$element = preg_replace($_pattern, '<span class="serendipity_searchQuery">$1</span>', $element);
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} // end foreach
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} // end foreach
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return;
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} // end if
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if ( $event == 'css' ) {
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/* If the user hasn't added a CSS Class called serendipity_searchQuery, we add a pretty one for him */
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if ( strstr($eventData, '.serendipity_searchQuery') === false ) {
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$eventData .= "\n";
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$eventData .= '.serendipity_searchQuery {' . "\n";
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$eventData .= ' background-color: #D81F2A;' . "\n";
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$eventData .= ' color: #FFFFFF;' . "\n";
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$eventData .= '}' . "\n";
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}
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return;
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}
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} // end function
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}
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/* vim: set sts=4 ts=4 expandtab : */
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