/**
  * @return Returns the singleton instance of this class POCStats.
  */
 public static function Instance()
 {
     if (!isset(self::$_Instance)) {
         $c = __CLASS__;
         self::$_Instance = new $c();
     }
     return self::$_Instance;
 }
 /**
  * @todo doc
  * @param $fontcode Is the list of parameter gotten from URL.
  */
 protected function statPagesByCode(array &$fontcode)
 {
     global $wgOut;
     global $wgPieceOfCodeConfig;
     if ($wgPieceOfCodeConfig['stats']) {
         $out = "";
         $code = POCStoredCodes::Instance()->getByCode($fontcode['code']);
         if ($this->_errors->ok()) {
             $this->appendTOC($out);
             $out .= "== " . wfMsg('poc-sinfo-information') . " ==\n";
             $out .= "*'''" . wfMsg('poc-sinfo-connection') . "''': {$code['connection']}\n";
             $out .= "*'''" . wfMsg('poc-sinfo-path') . "''': {$code['path']}\n";
             $out .= "*'''" . wfMsg('poc-sinfo-revision') . "''': {$code['revision']}\n";
             $out .= "*'''" . wfMsg('poc-sinfo-lang') . "''': {$code['lang']}\n";
             $auxUrl = Title::makeTitle(NS_USER, $code['user'])->getFullURL();
             $out .= "*'''" . wfMsg('poc-sinfo-user') . "''': [[User:{$code['user']}|{$code['user']}]]\n";
             $auxUrl = Title::makeTitle(NS_SPECIAL, 'PieceOfCode')->escapeFullURL("action=show&connection={$code['connection']}&path={$code['path']}&revision={$code['revision']}");
             $out .= "*[{$auxUrl} " . wfMsg('poc-view-source') . "]\n";
             $out .= "== " . wfMsg('poc-sinfo-usage') . " ==\n";
             $out .= "{|class=\"wikitable sortable\"\n";
             $out .= "|-\n";
             $out .= "!" . wfMsg('poc-sinfo-page') . "\n";
             $out .= "!" . wfMsg('poc-sinfo-stored-codes-count') . "\n";
             $out .= "!" . wfMsg('poc-sinfo-stored-codes-user') . "\n";
             foreach (POCStats::Instance()->getCodePages($fontcode['code']) as $c) {
                 $out .= "|-\n";
                 $auxPage = Title::newFromID($c['page_id']);
                 $title = $c['title'];
                 /*
                  * Checking if it isn't the default namesapace.
                  */
                 if ($auxPage->getNamespace() != NS_MAIN) {
                     $title = $auxPage->getNsText() . $title;
                 }
                 $out .= "|[[{$title}]]\n";
                 $out .= "|{$c['times']}\n";
                 $out .= "|[[User:{$c['last_user']}|{$c['last_user']}]]\n";
             }
             $out .= "|}\n";
             $out .= "== " . wfMsg('poc-sinfo-history') . " ==\n";
             $out .= "{|class=\"wikitable\"\n";
             $out .= "|-\n";
             $out .= "!" . wfMsg('poc-sinfo-stored-codes-action') . "\n";
             $out .= "!" . wfMsg('poc-sinfo-stored-codes-user') . "\n";
             $out .= "!" . wfMsg('poc-sinfo-stored-codes-description') . "\n";
             $out .= "!" . wfMsg('poc-sinfo-stored-codes-timestamp') . "\n";
             foreach ($this->_history->getHistory($fontcode['code']) as $h) {
                 $out .= "|-\n";
                 $out .= "|" . wfMsg('poc-sinfo-history-' . $h['action']) . "\n";
                 $out .= "|[[User:{$h['user']}|{$h['user']}]]\n";
                 $out .= "|{$h['description']}\n";
                 $out .= "|{$h['timestamp']}\n";
             }
             $out .= "|}\n";
             $out .= "== " . wfMsg('poc-sinfo-links') . " ==\n";
             $out .= "*[[Special:PieceOfCode|Back]]\n";
         } else {
             $out .= $this->_errors->getLastError();
         }
         $wgOut->addWikiText($out);
     } else {
         $wgOut->addHTML($this->_errors->setLastError(wfMsg('poc-errmsg-stats-disabled')));
     }
 }