/**
  * When we display a namespace, we want to:
  * - link to it's main page (if such a page exists)
  * - get the id of this main page (if the option is active)
  *
  * @param         $ns  A structure which represents a namespace
  */
 function prepareFile(&$ns)
 {
     $idMainPage = $this->getMainPageId($ns);
     $ns['title'] = $this->buildTitle($idMainPage, noNS($ns['id']));
     $ns['id'] = $this->buildIdToLinkTo($idMainPage, $ns['id']);
     $ns['sort'] = $this->buildSortAttribute($ns['title'], $ns['id'], $ns['mtime']);
 }

 function saved(&$event, $param)
 {
     global $ID;
     global $PROJECTS_REMAKE;
     if (auth_quickaclcheck($ID) <= AUTH_READ) {
         return;
     }
     $project = Project::project();
     if ($project == NULL) {
         return;
     }
     $file = $event->data['current']['ProjectFile'];
     $name = noNS($ID);
     if ($file == NULL) {
         // check whether the file is deleted
         if ($project->file($name) == NULL) {
             return;
         }
         // it was int he project
         if (!$project->remove_file($name)) {
             msg('Other users are currently updating the project. Please save this page later.');
             $evemt->data['current']['internal']['cache'] = false;
         }
         return;
     }
     if (!$project->update_file($file)) {
         msg('Other users are currently updating the project. Please save this page later.');
         $evemt->data['current']['internal']['cache'] = false;
     }
 }

/**
 * Searches for matching pagenames
 *
 * @author Andreas Gohr <[email protected]>
 */
function ajax_qsearch()
{
    global $conf;
    global $lang;
    $query = cleanID($_POST['q']);
    if (empty($query)) {
        $query = cleanID($_GET['q']);
    }
    if (empty($query)) {
        return;
    }
    require_once DOKU_INC . 'inc/html.php';
    require_once DOKU_INC . 'inc/fulltext.php';
    $data = array();
    $data = ft_pageLookup($query);
    if (!count($data)) {
        return;
    }
    print '<strong>' . $lang['quickhits'] . '</strong>';
    print '<ul>';
    foreach ($data as $id) {
        print '<li>';
        $ns = getNS($id);
        if ($ns) {
            $name = shorten(noNS($id), ' (' . $ns . ')', 30);
        } else {
            $name = $id;
        }
        print html_wikilink(':' . $id, $name);
        print '</li>';
    }
    print '</ul>';
}

 function pagefromtemplate(&$event, $param)
 {
     if (strlen(trim($_REQUEST['newpagetemplate'])) > 0) {
         global $conf;
         global $INFO;
         global $ID;
         $tpl = io_readFile(wikiFN($_REQUEST['newpagetemplate']));
         if ($this->getConf('userreplace')) {
             $stringvars = array_map(create_function('$v', 'return explode(",",$v,2);'), explode(';', $_REQUEST['newpagevars']));
             foreach ($stringvars as $value) {
                 $tpl = str_replace(trim($value[0]), trim($value[1]), $tpl);
             }
         }
         if ($this->getConf('standardreplace')) {
             // replace placeholders
             $file = noNS($ID);
             $page = strtr($file, '_', ' ');
             $tpl = str_replace(array('@ID@', '@NS@', '@FILE@', '@!FILE@', '@!FILE!@', '@PAGE@', '@!PAGE@', '@!!PAGE@', '@!PAGE!@', '@USER@', '@NAME@', '@MAIL@', '@DATE@'), array($ID, getNS($ID), $file, utf8_ucfirst($file), utf8_strtoupper($file), $page, utf8_ucfirst($page), utf8_ucwords($page), utf8_strtoupper($page), $_SERVER['REMOTE_USER'], $INFO['userinfo']['name'], $INFO['userinfo']['mail'], $conf['dformat']), $tpl);
             // we need the callback to work around strftime's char limit
             $tpl = preg_replace_callback('/%./', create_function('$m', 'return strftime($m[0]);'), $tpl);
         }
         $event->result = $tpl;
         $event->preventDefault();
     }
 }

 private function buildSortAttribute($pageTitle, $pageId)
 {
     if ($this->sortPageById) {
         return noNS($pageId);
     } else {
         return $pageTitle;
     }
 }

 /**
  * The constructor, this creates a new project.
  * Taking an array that specifies the path a project.
  * This array is created from the wiki namespace path
  */
 public function __construct($ID)
 {
     $this->ID = $ID;
     $this->project_path = DOKU_DATA . implode('/', explode(":", $ID)) . '/';
     $this->project_file = $this->project_path . noNS($this->ID) . '.project';
     $this->mutex = new Mutex($this->project_file);
     $this->version_string = PROJECTS_VERSION;
     $this->create();
 }

 /**
  * Sets a new title in the database;
  *
  * @param string|null $title set null to derive from PID
  */
 public function setTitle($title)
 {
     if ($title === null) {
         $title = noNS($this->pid);
     }
     // only one of these will succeed
     $sql = "UPDATE OR IGNORE titles SET title = ? WHERE pid = ?";
     $this->sqlite->query($sql, array($title, $this->pid));
     $sql = "INSERT OR IGNORE INTO titles (title, pid) VALUES (?,?)";
     $this->sqlite->query($sql, array($title, $this->pid));
     $this->title = $title;
 }

function indexmenu_search_index(&$data, $base, $file, $type, $lvl, $opts)
{
    global $conf;
    $ret = true;
    $item = array();
    if ($type == 'f' && !preg_match('#\\.txt$#', $file)) {
        // don't add
        return false;
    }
    // get page id by filename
    $id = pathID($file);
    // check hiddens
    if ($type == 'f' && isHiddenPage($id)) {
        return false;
    }
    //  bugfix for the
    //  /ns/
    //  /<ns>.txt
    //  case, need to force the 'directory' type
    if ($type == 'f' && file_exists(dirname(wikiFN($id . ":" . noNS($id))))) {
        $type = 'd';
    }
    // page target id = global id
    $target = $id;
    if ($type == 'd') {
        // this will check 3 kinds of headpage:
        // 1. /<ns>/<ns>.txt
        // 2. /<ns>/
        //    /<ns>.txt
        // 3. /<ns>/
        //    /<ns>/<start_page>
        $nsa = array($id . ":" . noNS($id), $id, $id . ":" . $conf['start']);
        $nspage = false;
        foreach ($nsa as $nsp) {
            if (@file_exists(wikiFN($nsp)) && auth_quickaclcheck($nsp) >= AUTH_READ) {
                $nspage = $nsp;
                break;
            }
        }
        //headpage exists
        if ($nspage) {
            $target = $nspage;
        } else {
            // open namespace index, if headpage does not exists
            $target = $target . ':';
        }
    }
    $data[] = array('id' => $id, 'date' => @filectime(wikiFN($target)), 'type' => $type, 'target' => $target, 'title' => $conf['useheading'] && ($title = p_get_first_heading($target)) ? $title : $id, 'level' => $lvl);
    if (substr_count($id, ":") > 2) {
        $ret = 0;
    }
    return $ret;
}

 /**
  * Check if the user wants a file to be displayed.
  * Filters consider the "id" and not the "title". Therefore, the treatment is the same for files and for subnamespace.
  * Moreover, filters remain valid even if the title of a page is changed.
  *
  * @param Array  $excludedFiles  A list of files that shouldn't be displayed
  * @param string $file
  * @return bool
  */
 function isFileWanted($file) {
     $wanted = true;
     $noNSId = noNS($file['id']);
     $wanted &= (!in_array($noNSId, $this->excludedFiles));
     foreach($this->pregOn as $preg) {
         $wanted &= preg_match($preg, $noNSId);
     }
     foreach($this->pregOff as $preg) {
         $wanted &= !preg_match($preg, $noNSId);
     }
     return $wanted;
 }

 function settings_plugin_siteexport_settings($functions)
 {
     global $ID;
     $functions->debug->setDebugLevel($this->getConf('debugLevel'));
     $functions->debug->setDebugFile($this->getConf('debugFile'));
     if (empty($_REQUEST['pattern'])) {
         $params = $_REQUEST;
         $this->pattern = $functions->requestParametersToCacheHash($params);
     } else {
         // Set the pattern
         $this->pattern = $_REQUEST['pattern'];
     }
     $this->isCLI = !$_SERVER['REMOTE_ADDR'] && 'cli' == php_sapi_name();
     $this->cachetime = $this->getConf('cachetime');
     if (!empty($_REQUEST['disableCache'])) {
         $this->cachetime = intval($_REQUEST['disableCache']) == 1 ? 0 : $this->cachetime;
     }
     // Load Variables
     $this->origZipFile = $this->getConf('zipfilename');
     $this->ignoreNon200 = $this->getConf('ignoreNon200');
     // ID
     $this->downloadZipFile = $functions->getSpecialExportFileName($this->origZipFile, $this->pattern);
     //        $this->eclipseZipFile = $functions->getSpecialExportFileName(getNS($this->origZipFile) . ':' . $this->origEclipseZipFile, $this->pattern);
     $this->zipFile = mediaFN($this->downloadZipFile);
     $this->tmpDir = mediaFN(getNS($this->origZipFile));
     $this->exportLinkedPages = intval($_REQUEST['exportLinkedPages']) == 1 ? true : false;
     $this->namespace = $functions->getNamespaceFromID($_REQUEST['ns'], $PAGE);
     $this->addParams = !empty($_REQUEST['addParams']);
     $this->useTOCFile = !empty($_REQUEST['useTocFile']);
     // set export Namespace - which is a virtual Root
     $pg = noNS($ID);
     if (empty($this->namespace)) {
         $this->namespace = $functions->getNamespaceFromID(getNS($ID), $pg);
     }
     $this->exportNamespace = !empty($_REQUEST['ens']) && preg_match("%^" . $functions->getNamespaceFromID($_REQUEST['ens'], $pg) . "%", $this->namespace) ? $functions->getNamespaceFromID($_REQUEST['ens'], $pg) : $this->namespace;
     $this->TOCMapWithoutTranslation = intval($_REQUEST['TOCMapWithoutTranslation']) == 1 ? true : false;
     // Strip params that should be forwarded
     $this->additionalParameters = $_REQUEST;
     $functions->removeWikiVariables($this->additionalParameters, true);
     $tmpID = $ID;
     $ID = $this->origZipFile;
     $INFO = pageinfo();
     if (!$this->isCLI) {
         // Workaround for the cron which cannot authenticate but has access to everything.
         if ($INFO['perm'] < AUTH_DELETE) {
             list($USER, $PASS) = $functions->basic_authentication();
             auth_login($USER, $PASS);
         }
     }
     $ID = $tmpID;
 }

 public function xhtml()
 {
     global $ID;
     $ns = getNS($ID);
     list($files, $subprojects) = Projects_file::project_files($ns);
     $generated = array();
     $source = array();
     foreach ($files as $id => $file) {
         if ($file->type() == 'source') {
             $source[$id] = $file;
         } elseif ($file->type() == 'generated') {
             $generated[$id] = $file;
         }
     }
     ksort($generated);
     ksort($source);
     sort($subprojects);
     echo '<h1>Source files</h1>' . DOKU_LF;
     echo '<ul>' . DOKU_LF;
     echo '<li>' . create_button('source') . '</li>' . DOKU_LF;
     foreach ($source as $id => $file) {
         echo '<li>' . html_wikilink($id) . ': ' . download_button($id) . ', ' . delete_button($id) . '</li>' . DOKU_LF;
     }
     echo '</ul>' . DOKU_LF;
     echo '<h1>Generated files</h1>' . DOKU_LF;
     echo '<ul>' . DOKU_LF;
     echo '<li>' . create_button('generated') . '</li>' . DOKU_LF;
     foreach ($generated as $id => $file) {
         $make = make_button($id, $file->status() == PROJECTS_MADE);
         echo '<li>' . html_wikilink($id) . ': ' . download_button($id) . ', ' . delete_button($id) . ', ' . $make . '</li>' . DOKU_LF;
     }
     echo '</ul>' . DOKU_LF;
     echo '<h1>Subprojects</h1>' . DOKU_LF;
     echo '<ul>' . DOKU_LF;
     echo '<li>' . create_button($ID, 'project') . '</li>' . DOKU_LF;
     foreach ($subprojects as $sub) {
         echo '<li><a href="' . wl($sub . ':', array('do' => 'manage_files')) . '">' . noNS($sub) . '</a></li>' . DOKU_LF;
     }
     echo '</ul>' . DOKU_LF;
     if ($ns) {
         $name = getNS($ns);
         $id = $name . ':';
         if (!$name) {
             $id = '/';
             $name = '/ (root)';
         }
         echo '<h1>Parent projects</h1>' . DOKU_LF;
         echo '<ul><li><a href="' . wl($id, array('do' => 'manage_files')) . '">' . $name . '</a></li></ul>' . DOKU_LF;
     }
 }

 public function handle_common_pagetpl_load(Doku_Event &$event, $param)
 {
     global $conf;
     if (empty($event->data['tplfile'])) {
         $path = dirname(wikiFN($event->data['id']));
         $len = strlen(rtrim($conf['datadir'], '/'));
         $dir = substr($path, strrpos($path, '/') + 1);
         $blnFirst = true;
         $blnFirstDir = true;
         while (strLen($path) >= $len) {
             if ($blnFirst == true && @file_exists($path . '/_' . noNS($event->data['id']) . '.txt')) {
                 $event->data['tplfile'] = $path . '/_' . noNS($event->data['id'] . '.txt');
                 break;
             } elseif (@file_exists($path . '/__' . noNS($event->data['id']) . '.txt')) {
                 $event->data['tplfile'] = $path . '/__' . noNS($event->data['id'] . '.txt');
                 break;
             } elseif ($blnFirst == true && @file_exists($path . '/_template.txt')) {
                 $event->data['tplfile'] = $path . '/_template.txt';
                 break;
             } elseif ($blnFirst == false && $blnFirstDir == true && @file_exists($path . '/~_' . $dir . '.txt') && noNS($event->data['id']) == 'start') {
                 $event->data['tplfile'] = $path . '/~_' . $dir . '.txt';
                 break;
             } elseif ($blnFirst == false && $blnFirstDir == true && @file_exists($path . '/~' . $dir . '.txt')) {
                 $event->data['tplfile'] = $path . '/~' . $dir . '.txt';
                 break;
             } elseif ($blnFirst == false && @file_exists($path . '/~~_' . $dir . '.txt') && noNS($event->data['id']) == 'start') {
                 $event->data['tplfile'] = $path . '/~~_' . $dir . '.txt';
                 break;
             } elseif ($blnFirst == false && @file_exists($path . '/~~' . $dir . '.txt')) {
                 $event->data['tplfile'] = $path . '/~~' . $dir . '.txt';
                 break;
             } elseif (@file_exists($path . '/__template.txt')) {
                 $event->data['tplfile'] = $path . '/__template.txt';
                 break;
             }
             $path = substr($path, 0, strrpos($path, '/'));
             if ($blnFirst == false) {
                 $blnFirstDir = false;
             }
             $blnFirst = false;
         }
     }
 }

 private function show()
 {
     global $REV;
     global $ID;
     $path = wikiFN($ID);
     if (file_exists($path) || $REV) {
         return FALSE;
     }
     ob_start();
     echo '<h1>Page "' . noNS($ID) . '" Does Not Exist</h1>' . DOKU_LF;
     echo '<ul><li>Create a:</li>' . DOKU_LF;
     echo '<ul>' . DOKU_LF;
     echo '<li><a href="' . wl($ID, array('do' => 'create', 'type' => 'source')) . '">' . 'source file</a></li>' . DOKU_LF;
     echo '<li><a href="' . wl($ID, array('do' => 'create', 'type' => 'generated')) . '">' . 'generated file</a></li>' . DOKU_LF;
     echo '<li><a href="' . wl($ID, array('do' => 'edit')) . '">' . 'plain wiki page</a></li>' . DOKU_LF;
     echo '</ul>' . DOKU_LF;
     echo '<li>Manage <a href="' . wl($ID, array('do' => 'manage_files')) . '">other files</a></li>' . DOKU_LF;
     echo '</ul>' . DOKU_LF;
     trigger_event('TPL_CONTENT_DISPLAY', $html_output, 'ptln');
     return TRUE;
 }

 /**
  * Saves the name of the uploaded media file to a meta file
  */
 function _saveMeta(&$event)
 {
     global $conf;
     $id = $event->data[2];
     $filename_tidy = noNS($id);
     // retrieve original filename
     if (isset($_GET['qqfile'])) {
         // via ajax uploader
         $filename_orig = (string) $_GET['qqfile'];
     } elseif (isset($_POST['mediaid'])) {
         if (isset($_FILES['qqfile']['name'])) {
             // via ajax uploader
             $filename_orig = (string) $_FILES['qqfile']['name'];
         } elseif (isset($_FILES['upload']['name'])) {
             // via old-fashioned upload form
             $filename_orig = (string) $_FILES['upload']['name'];
         } else {
             return;
         }
         // check if filename is specified
         $specified_name = (string) $_POST['mediaid'];
         if ($specified_name !== '') {
             $filename_orig = $specified_name;
         }
     } else {
         return;
     }
     $filename_safe = $this->common->_sanitizeFileName($filename_orig);
     // no need to save original filename
     if ($filename_tidy === $filename_safe) {
         return;
     }
     // fallback if suspicious characters found
     if ($filename_orig !== $filename_safe) {
         return;
     }
     // save original filename to meta file
     io_saveFile(mediaMetaFN($id, '.filename'), serialize(array('filename' => $filename_safe)));
 }

    public function test_movePageWithRelativeMedia() {
        global $ID;

        $ID = 'mediareltest:foo';
        saveWikiText($ID,
            '{{ myimage.png}} [[:start|{{ testimage.png?200x800 }}]] [[bar|{{testimage.gif?400x200}}]]
[[doku>wiki:dokuwiki|{{wiki:logo.png}}]] [[http://www.example.com|{{testimage.jpg}}]]
[[doku>wiki:foo|{{foo.gif?200x3000}}]]', 'Test setup');
        idx_addPage($ID);

        $opts = array();
        $opts['ns']   = getNS($ID);
        $opts['name'] = noNS($ID);
        $opts['newns'] = '';
        $opts['newname'] = 'foo';
        /** @var helper_plugin_move $move */
        $move = plugin_load('helper', 'move');
        $this->assertTrue($move->move_page($opts));

        $this->assertEquals('{{ mediareltest:myimage.png}} [[:start|{{ mediareltest:testimage.png?200x800 }}]] [[mediareltest:bar|{{mediareltest:testimage.gif?400x200}}]]
[[doku>wiki:dokuwiki|{{wiki:logo.png}}]] [[http://www.example.com|{{mediareltest:testimage.jpg}}]]
[[doku>wiki:foo|{{mediareltest:foo.gif?200x3000}}]]', rawWiki('foo'));
    }

 private function button_rename_use($range)
 {
     global $ID;
     if (auth_quickaclcheck($ID) < AUTH_EDIT) {
         return '';
     }
     $self = noNS($ID);
     $project = Project::project();
     if ($project == NULL) {
         return '';
     }
     $files = array('');
     foreach (array_keys($project->files()) as $file) {
         if ($file != $self) {
             $files[] = $file;
         }
     }
     $form = new Doku_Form("change_use");
     $form->addHidden('do', 'change_use');
     $form->addHidden('range', $range);
     $form->addElement(form_makeMenuField('use', $files, '', '', '', '', array("onchange" => "submit();")));
     return $form->getForm();
 }

/**
 * Returns the pagetemplate contents for the ID's namespace
 *
 * @author Andreas Gohr <[email protected]>
 */
function pageTemplate($data)
{
    $id = $data[0];
    global $conf;
    global $INFO;
    $tpl = io_readFile(dirname(wikiFN($id)) . '/_template.txt');
    $tpl = str_replace('@ID@', $id, $tpl);
    $tpl = str_replace('@NS@', getNS($id), $tpl);
    $tpl = str_replace('@PAGE@', strtr(noNS($id), '_', ' '), $tpl);
    $tpl = str_replace('@USER@', $_SERVER['REMOTE_USER'], $tpl);
    $tpl = str_replace('@NAME@', $INFO['userinfo']['name'], $tpl);
    $tpl = str_replace('@MAIL@', $INFO['userinfo']['mail'], $tpl);
    $tpl = str_replace('@DATE@', date($conf['dformat']), $tpl);
    return $tpl;
}

/**
 * Run a search and display the result
 *
 * @author Andreas Gohr <[email protected]>
 */
function html_search()
{
    global $conf;
    global $QUERY;
    global $ID;
    global $lang;
    $intro = p_locale_xhtml('searchpage');
    // allow use of placeholder in search intro
    $intro = str_replace(array('@QUERY@', '@SEARCH@'), array(hsc(rawurlencode($QUERY)), hsc($QUERY)), $intro);
    echo $intro;
    flush();
    //show progressbar
    print '<div class="centeralign" id="dw__loading">' . NL;
    print '<script type="text/javascript" charset="utf-8"><!--//--><![CDATA[//><!--' . NL;
    print 'showLoadBar();' . NL;
    print '//--><!]]></script>' . NL;
    print '<br /></div>' . NL;
    flush();
    //do quick pagesearch
    $data = array();
    $data = ft_pageLookup($QUERY, true, useHeading('navigation'));
    if (count($data)) {
        print '<div class="search_quickresult">';
        print '<h3>' . $lang['quickhits'] . ':</h3>';
        print '<ul class="search_quickhits">';
        foreach ($data as $id => $title) {
            print '<li> ';
            if (useHeading('navigation')) {
                $name = $title;
            } else {
                $ns = getNS($id);
                if ($ns) {
                    $name = shorten(noNS($id), ' (' . $ns . ')', 30);
                } else {
                    $name = $id;
                }
            }
            print html_wikilink(':' . $id, $name);
            print '</li> ';
        }
        print '</ul> ';
        //clear float (see http://www.complexspiral.com/publications/containing-floats/)
        print '<div class="clearer"></div>';
        print '</div>';
    }
    flush();
    //do fulltext search
    $data = ft_pageSearch($QUERY, $regex);
    if (count($data)) {
        $num = 1;
        foreach ($data as $id => $cnt) {
            print '<div class="search_result">';
            print html_wikilink(':' . $id, useHeading('navigation') ? null : $id, $regex);
            if ($cnt !== 0) {
                print ': <span class="search_cnt">' . $cnt . ' ' . $lang['hits'] . '</span><br />';
                if ($num < FT_SNIPPET_NUMBER) {
                    // create snippets for the first number of matches only
                    print '<div class="search_snippet">' . ft_snippet($id, $regex) . '</div>';
                }
                $num++;
            }
            print '</div>';
            flush();
        }
    } else {
        print '<div class="nothing">' . $lang['nothingfound'] . '</div>';
    }
    //hide progressbar
    print '<script type="text/javascript" charset="utf-8"><!--//--><![CDATA[//><!--' . NL;
    print 'hideLoadBar("dw__loading");' . NL;
    print '//--><!]]></script>' . NL;
    flush();
}

 /**
  * Embed audio in HTML
  *
  * @author Anika Henke <[email protected]>
  *
  * @param string $src       - ID of audio to embed
  * @param array  $atts      - additional attributes for the <audio> tag
  * @return string
  */
 function _audio($src, $atts = array())
 {
     $files = array();
     $isExternal = media_isexternal($src);
     if ($isExternal) {
         // take direct source for external files
         list(, $srcMime) = mimetype($src);
         $files[$srcMime] = $src;
     } else {
         // prepare alternative formats
         $extensions = array('ogg', 'mp3', 'wav');
         $files = media_alternativefiles($src, $extensions);
     }
     $out = '';
     // open audio tag
     $out .= '<audio ' . buildAttributes($atts) . ' controls="controls">' . NL;
     $fallback = '';
     // output source for each alternative audio format
     foreach ($files as $mime => $file) {
         if ($isExternal) {
             $url = $file;
             $linkType = 'externalmedia';
         } else {
             $url = ml($file, '', true, '&');
             $linkType = 'internalmedia';
         }
         $title = $atts['title'] ? $atts['title'] : $this->_xmlEntities(utf8_basename(noNS($file)));
         $out .= '<source src="' . hsc($url) . '" type="' . $mime . '" />' . NL;
         // alternative content (just a link to the file)
         $fallback .= $this->{$linkType}($file, $title, null, null, null, $cache = null, $linking = 'linkonly', $return = true);
     }
     // finish
     $out .= $fallback;
     $out .= '</audio>' . NL;
     return $out;
 }

 /**
  * Returns a list of pages with a certain tag; very similar to ft_backlinks()
  *
  * @param string $ns A namespace to which all pages need to belong, "." for only the root namespace
  * @param int    $num The maximum number of pages that shall be returned
  * @param string $tag The tag that shall be searched
  * @return array The list of pages
  *
  * @author  Esther Brunner <[email protected]>
  */
 function getTopic($ns = '', $num = NULL, $tag = '')
 {
     if (!$tag) {
         $tag = $_REQUEST['tag'];
     }
     $tag = $this->_parseTagList($tag, true);
     $result = array();
     // find the pages using topic.idx
     $pages = $this->_tagIndexLookup($tag);
     if (!count($pages)) {
         return $result;
     }
     foreach ($pages as $page) {
         // exclude pages depending on ACL and namespace
         if ($this->_notVisible($page, $ns)) {
             continue;
         }
         $tags = $this->_getSubjectMetadata($page);
         // don't trust index
         if (!$this->_checkPageTags($tags, $tag)) {
             continue;
         }
         // get metadata
         $meta = p_get_metadata($page);
         $perm = auth_quickaclcheck($page);
         // skip drafts unless for users with create privilege
         $draft = $meta['type'] == 'draft';
         if ($draft && $perm < AUTH_CREATE) {
             continue;
         }
         $title = $meta['title'];
         $date = $this->sort == 'mdate' ? $meta['date']['modified'] : $meta['date']['created'];
         $taglinks = $this->tagLinks($tags);
         // determine the sort key
         if ($this->sort == 'id') {
             $key = $page;
         } elseif ($this->sort == 'ns') {
             $pos = strrpos($page, ':');
             if ($pos === false) {
                 $key = "" . $page;
             } else {
                 $key = substr_replace($page, "", $pos, 1);
             }
             $key = str_replace(':', "", $key);
         } elseif ($this->sort == 'pagename') {
             $key = noNS($page);
         } elseif ($this->sort == 'title') {
             $key = utf8_strtolower($title);
             if (empty($key)) {
                 $key = str_replace('_', ' ', noNS($page));
             }
         } else {
             $key = $date;
         }
         // make sure that the key is unique
         $key = $this->_uniqueKey($key, $result);
         $result[$key] = array('id' => $page, 'title' => $title, 'date' => $date, 'user' => $meta['creator'], 'desc' => $meta['description']['abstract'], 'cat' => $tags[0], 'tags' => $taglinks, 'perm' => $perm, 'exists' => true, 'draft' => $draft);
         if ($num && count($result) >= $num) {
             break;
         }
     }
     // finally sort by sort key
     if ($this->getConf('sortorder') == 'ascending') {
         ksort($result);
     } else {
         krsort($result);
     }
     return $result;
 }