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<?php
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// $Id: search_engine_referers.module,v 1.12 2009/04/15 20:26:08 soxofaan Exp $
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/**
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* Implementation of hook_menu()
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*/
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function search_engine_referers_menu() {
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$items = array();
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$items['admin/reports/search_engine_referers'] = array(
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'title' => 'Search engine referers',
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'description' => 'Extract search queries from search engine referers in the access log.',
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'page callback' => 'search_engine_referers_overview',
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'access arguments' => array('view search engine referers'),
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);
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return $items;
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}
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/**
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* Implementation of hook_perm()
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*/
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function search_engine_referers_perm() {
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return array('view search engine referers');
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}
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/**
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* Callback function for overview page
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*/
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function search_engine_referers_overview() {
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// check if access logging is enabled
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if (!variable_get('statistics_enable_access_log', 0)) {
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drupal_set_message(t('The access log is not enabled. The listing of search engine referers will be empty or outdated. <a href="!accesslog">Enable and configure the access log</a>.', array('!accesslog' => url('admin/reports/settings'))), 'warning');
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}
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$output = '';
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// search engine patterns and properties
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$engines = array(
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'Google' => array(
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'host_pattern_sql' => 'http://www.google.%',
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'host_pattern_preg' => '!google(\\.[a-z]+)+$!',
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'path_pattern' => '!^/(search|url)!',
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'query_variable' => 'q',
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),
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'Yahoo!' => array(
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'host_pattern_sql' => 'http://%search.yahoo.com/%',
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'host_pattern_preg' => '!([a-z]+\\.)*search.yahoo.com!',
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'path_pattern' => '!^/search!',
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'query_variable' => 'p',
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),
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'Live search' => array(
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'host_pattern_sql' => 'http://search.%.com/results.aspx%',
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'host_pattern_preg' => '!search\\.(live|msn)\\.com!',
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'path_pattern' => '!^/results.aspx!',
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'query_variable' => 'q',
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),
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'Yandex' => array(
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'host_pattern_sql' => 'http://%yandex.ru/yandsearch%',
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'host_pattern_preg' => '!yandex.ru!',
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'path_pattern' => '!^/yandsearch!',
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'query_variable' => 'text',
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),
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'Rambler' => array(
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'host_pattern_sql' => 'http://www.rambler.ru/srch%',
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'host_pattern_preg' => '!rambler.ru!',
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'path_pattern' => '!^/srch!',
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'query_variable' => 'words',
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),
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);
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$num = intval(variable_get('search_engine_referers_db_limit', 10));
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// build the table
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$header = array(t('Date'), t('Page'), t('Search engine'), t('Query'));
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$rows = array();
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// iterate over the engines
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foreach ($engines as $engine_name => $engine) {
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$result = db_query_range("SELECT aid, timestamp, url, path FROM {accesslog} WHERE LOWER(url) LIKE LOWER('%s') ORDER BY timestamp DESC", $engine['host_pattern_sql'], 0, $num);
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while ($r = db_fetch_object($result)) {
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$url_data = parse_url($r->url);
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if (preg_match($engine['host_pattern_preg'], $url_data['host']) && preg_match($engine['path_pattern'], $url_data['path'])) {
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parse_str($url_data['query'], $query_data);
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# Create link to referer page
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$url = l($query_data[$engine['query_variable']], $r->url);
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# Fix empty links, which can happen if query_variable isn't found or in
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# case of non UTF encoding of the query.
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if (substr($url, -5) == '></a>') {
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$url = l(t('[n/a]'), $r->url);
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}
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# Page
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$title = drupal_get_path_alias($r->path);
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$title = truncate_utf8($title, 30, FALSE, TRUE);
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# Build row.
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$rows[$r->aid] = array(format_date($r->timestamp, 'small'), l($title, $r->path), $url_data['host'], $url);
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}
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}
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}
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// Sort rows by date (access id actually)
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krsort($rows);
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if (empty($rows)) {
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$rows[] = array(array('data' => t('No search engine referers found.'), 'colspan' => 4));
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}
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// theme the table
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$output .= theme('table', $header, $rows);
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// add settings form
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$output .= drupal_get_form('search_engine_referers_settings');
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return $output;
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}
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/**
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* Form generating function for search_engine_referers settings
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*/
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function search_engine_referers_settings() {
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$form = array();
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$form['search_engine_referers_db_limit'] = array(
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'#type' => 'select',
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'#title' => t('Maximum number of entries per search engine to display'),
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'#options' => array(5 => 5, 10 => 10, 15 => 15, 20 => 20, 30 => 30, 50 => 50),
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'#default_value' => variable_get('search_engine_referers_db_limit', 10),
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);
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return system_settings_form($form);
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}
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