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<?php
/**
* Global Search Engine for Moodle
*
* @package search
* @category core
* @subpackage search_engine
* @author Michael Champanis (mchampan) [cynnical@gmail.com], Valery Fremaux [valery.fremaux@club-internet.fr] > 1.8
* @date 2008/03/31
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
*
* The query page - accepts a user-entered query string and returns results.
*
* Queries are boolean-aware, e.g.:
*
* '+' term required
* '-' term must not be present
* '' (no modifier) term's presence increases rank, but isn't required
* 'field:' search this field
*
* Examples:
*
* 'earthquake +author:michael'
* Searches for documents written by 'michael' that contain 'earthquake'
*
* 'earthquake +doctype:wiki'
* Search all wiki pages for 'earthquake'
*
* '+author:helen +author:foster'
* All articles written by Helen Foster
*
*/
/**
* includes and requires
*/
require_once('../config.php');
require_once("$CFG->dirroot/search/lib.php");
if ($CFG->forcelogin) {
require_login();
}
if (empty($CFG->enableglobalsearch)) {
error(get_string('globalsearchdisabled', 'search'));
}
$adv = new Object();
/// check for php5, but don't die yet (see line 52)
if ($check = search_check_php5()) {
require_once("{$CFG->dirroot}/search/querylib.php");
$page_number = optional_param('page', -1, PARAM_INT);
$pages = ($page_number == -1) ? false : true;
$advanced = (optional_param('a', '0', PARAM_INT) == '1') ? true : false;
$query_string = optional_param('query_string', '', PARAM_CLEAN);
if ($pages && isset($_SESSION['search_advanced_query'])) {
// if both are set, then we are busy browsing through the result pages of an advanced query
$adv = unserialize($_SESSION['search_advanced_query']);
}
else if ($advanced) {
// otherwise we are dealing with a new advanced query
unset($_SESSION['search_advanced_query']);
session_unregister('search_advanced_query');
// chars to strip from strings (whitespace)
$chars = " \t\n\r\0\x0B,-+";
// retrieve advanced query variables
$adv->mustappear = trim(optional_param('mustappear', '', PARAM_CLEAN), $chars);
$adv->notappear = trim(optional_param('notappear', '', PARAM_CLEAN), $chars);
$adv->canappear = trim(optional_param('canappear', '', PARAM_CLEAN), $chars);
$adv->module = optional_param('module', '', PARAM_CLEAN);
$adv->title = trim(optional_param('title', '', PARAM_CLEAN), $chars);
$adv->author = trim(optional_param('author', '', PARAM_CLEAN), $chars);
}
if ($advanced) {
//parse the advanced variables into a query string
//TODO: move out to external query class (QueryParse?)
$query_string = '';
// get all available module types
$module_types = array_merge(array('all'), array_values(search_get_document_types()));
$adv->module = in_array($adv->module, $module_types) ? $adv->module : 'all';
// convert '1 2' into '+1 +2' for required words field
if (strlen(trim($adv->mustappear)) > 0) {
$query_string = ' +'.implode(' +', preg_split("/[\s,;]+/", $adv->mustappear));
}
// convert '1 2' into '-1 -2' for not wanted words field
if (strlen(trim($adv->notappear)) > 0) {
$query_string .= ' -'.implode(' -', preg_split("/[\s,;]+/", $adv->notappear));
}
// this field is left untouched, apart from whitespace being stripped
if (strlen(trim($adv->canappear)) > 0) {
$query_string .= ' '.implode(' ', preg_split("/[\s,;]+/", $adv->canappear));
}
// add module restriction
$doctypestr = get_string('doctype', 'search');
$titlestr = get_string('title', 'search');
$authorstr = get_string('author', 'search');
if ($adv->module != 'all') {
$query_string .= " +{$doctypestr}:".$adv->module;
}
// create title search string
if (strlen(trim($adv->title)) > 0) {
$query_string .= " +{$titlestr}:".implode(" +{$titlestr}:", preg_split("/[\s,;]+/", $adv->title));
}
// create author search string
if (strlen(trim($adv->author)) > 0) {
$query_string .= " +{$authorstr}:".implode(" +{$authorstr}:", preg_split("/[\s,;]+/", $adv->author));
}
// save our options if the query is valid
if (!empty($query_string)) {
$_SESSION['search_advanced_query'] = serialize($adv);
}
}
// normalise page number
if ($page_number < 1) {
$page_number = 1;
}
//run the query against the index
$sq = new SearchQuery($query_string, $page_number, 10, false);
}
if (!$site = get_site()) {
redirect("index.php");
}
$strsearch = get_string('search', 'search');
$strquery = get_string('enteryoursearchquery', 'search');
// if ($CFG->version < 2007032200){ NOT RELIABLE
if (!function_exists('build_navigation')){
print_header("$site->shortname: $strsearch: $strquery", "$site->fullname",
"<a href=\"index.php\">$strsearch</a> -> $strquery");
} else {
$navlinks[] = array('name' => $strsearch, 'link' => "index.php", 'type' => 'misc');
$navlinks[] = array('name' => $strquery, 'link' => null, 'type' => 'misc');
$navigation = build_navigation($navlinks);
$site = get_site();
print_header("$strsearch", "$site->fullname" , $navigation, "", "", true, "&nbsp;", navmenu($site));
}
//keep things pretty, even if php5 isn't available
if (!$check) {
print_heading(search_check_php5(true));
print_footer();
exit(0);
}
print_box_start();
print_heading($strquery);
print_box_start();
$vars = get_object_vars($adv);
if (isset($vars)) {
foreach ($vars as $key => $value) {
// htmlentities breaks non-ascii chars
$adv->key = stripslashes($value);
//$adv->$key = stripslashes(htmlentities($value));
}
}
?>
<form id="query" method="get" action="query.php">
<?php
if (!$advanced) {
?>
<input type="text" name="query_string" length="50" value="<?php print stripslashes($query_string) ?>" />
&nbsp;<input type="submit" value="<?php print_string('search', 'search') ?>" /> &nbsp;
<a href="query.php?a=1"><?php print_string('advancedsearch', 'search') ?></a> |
<a href="stats.php"><?php print_string('statistics', 'search') ?></a>
<?php
}
else {
print_box_start();
?>
<input type="hidden" name="a" value="<?php print $advanced; ?>"/>
<table border="0" cellpadding="3" cellspacing="3">
<tr>
<td width="240"><?php print_string('thesewordsmustappear', 'search') ?>:</td>
<td><input type="text" name="mustappear" length="50" value="<?php print $adv->mustappear; ?>" /></td>
</tr>
<tr>
<td><?php print_string('thesewordsmustnotappear', 'search') ?>:</td>
<td><input type="text" name="notappear" length="50" value="<?php print $adv->notappear; ?>" /></td>
</tr>
<tr>
<td><?php print_string('thesewordshelpimproverank', 'search') ?>:</td>
<td><input type="text" name="canappear" length="50" value="<?php print $adv->canappear; ?>" /></td>
</tr>
<tr>
<td><?php print_string('whichmodulestosearch?', 'search') ?>:</td>
<td>
<select name="module">
<?php
foreach($module_types as $mod) {
if ($mod == $adv->module) {
if ($mod != 'all'){
print "<option value='$mod' selected=\"selected\">".get_string('modulenameplural', $mod)."</option>\n";
}
else{
print "<option value='$mod' selected=\"selected\">".get_string('all', 'search')."</option>\n";
}
}
else {
if ($mod != 'all'){
print "<option value='$mod'>".get_string('modulenameplural', $mod)."</option>\n";
}
else{
print "<option value='$mod'>".get_string('all', 'search')."</option>\n";
}
}
}
?>
</select>
</td>
</tr>
<tr>
<td><?php print_string('wordsintitle', 'search') ?>:</td>
<td><input type="text" name="title" length="50" value="<?php print $adv->title; ?>" /></td>
</tr>
<tr>
<td><?php print_string('authorname', 'search') ?>:</td>
<td><input type="text" name="author" length="50" value="<?php print $adv->author; ?>" /></td>
</tr>
<tr>
<td colspan="3" align="center"><br /><input type="submit" value="<?php print_string('search', 'search') ?>" /></td>
</tr>
<tr>
<td colspan="3" align="center">
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><a href="query.php"><?php print_string('normalsearch', 'search') ?></a> |</td>
<td>&nbsp;<a href="stats.php"><?php print_string('statistics', 'search') ?></a></td>
</tr>
</table>
</td>
</tr>
</table>
<?php
print_box_end();
}
?>
</form>
<br/>
<div align="center">
<?php
print_string('searching', 'search') . ': ';
if ($sq->is_valid_index()) {
//use cached variable to show up-to-date index size (takes deletions into account)
print $CFG->search_index_size;
}
else {
print "0";
}
print ' ';
print_string('documents', 'search');
print '.';
if (!$sq->is_valid_index() and isadmin()) {
print '<p>' . get_string('noindexmessage', 'search') . '<a href="indexersplash.php">' . get_string('createanindex', 'search')."</a></p>\n";
}
?>
</div>
<?php
print_box_end();
// prints all the results in a box
if ($sq->is_valid()) {
print_box_start();
search_stopwatch();
$hit_count = $sq->count();
print "<br />";
print $hit_count.' '.get_string('resultsreturnedfor', 'search') . " '".stripslashes($query_string)."'.";
print "<br />";
if ($hit_count > 0) {
$page_links = $sq->page_numbers();
$hits = $sq->results();
if ($advanced) {
// if in advanced mode, search options are saved in the session, so
// we can remove the query string var from the page links, and replace
// it with a=1 (Advanced = on) instead
$page_links = preg_replace("/query_string=[^&]+/", 'a=1', $page_links);
}
print "<ol>";
$typestr = get_string('type', 'search');
$scorestr = get_string('score', 'search');
$authorstr = get_string('author', 'search');
foreach ($hits as $listing) {
//if ($CFG->unicodedb) {
//$listing->title = mb_convert_encoding($listing->title, 'auto', 'UTF8');
//}
$title_post_processing_function = $listing->doctype.'_link_post_processing';
require_once "{$CFG->dirroot}/search/documents/{$listing->doctype}_document.php";
if (function_exists($title_post_processing_function)) {
$listing->title = $title_post_processing_function($listing->title);
}
print "<li value='".($listing->number+1)."'><a href='".str_replace('DEFAULT_POPUP_SETTINGS', DEFAULT_POPUP_SETTINGS ,$listing->url)."'>$listing->title</a><br />\n"
."<em>".search_shorten_url($listing->url, 70)."</em><br />\n"
."{$typestr}: ".$listing->doctype.", {$scorestr}: ".round($listing->score, 3);
if (!empty($listing->author)){
print ", {$authorstr}: ".$listing->author."\n"
."</li>\n";
}
}
print "</ol>";
print $page_links;
}
print_box_end();
?>
<div align="center">
<?php
print_string('ittook', 'search');
search_stopwatch();
print_string('tofetchtheseresults', 'search');
?>.
</div>
<?php
}
print_box_end();
print_footer();
?>
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