PHP SFUtils::makeRandomNumber方法代码示例

 /**
  * Generates a target name from the given target name formula
  *
  * This parses the formula and replaces <unique number> tags
  *
  * @param type $targetNameFormula
  *
  * @throws MWException
  * @return type
  */
 protected function generateTargetName($targetNameFormula)
 {
     $targetName = $targetNameFormula;
     // prepend a super-page, if one was specified
     if ($this->getRequest()->getCheck('super_page')) {
         $targetName = $this->getRequest()->getVal('super_page') . '/' . $targetName;
     }
     // prepend a namespace, if one was specified
     if ($this->getRequest()->getCheck('namespace')) {
         $targetName = $this->getRequest()->getVal('namespace') . ':' . $targetName;
     }
     // replace "unique number" tag with one that won't get erased by the next line
     $targetName = preg_replace('/<unique number(.*)>/', '{num\\1}', $targetName, 1);
     // if any formula stuff is still in the name after the parsing, just remove it
     // FIXME: This is wrong. If anything is still left, something should have been present in the form and wasn't. An error should be raised.
     //$targetName = StringUtils::delimiterReplace( '<', '>', '', $targetName );
     // replace spaces back with underlines, in case a magic word or parser
     // function name contains underlines - hopefully this won't cause
     // problems of its own
     $targetName = str_replace(' ', '_', $targetName);
     // now run the parser on it
     global $wgParser;
     $targetName = $wgParser->transformMsg($targetName, ParserOptions::newFromUser(null));
     $titleNumber = '';
     $isRandom = false;
     $randomNumHasPadding = false;
     $randomNumDigits = 6;
     if (preg_match('/{num.*}/', $targetName, $matches) && strpos($targetName, '{num') !== false) {
         // Random number
         if (preg_match('/{num;random(;(0)?([1-9][0-9]*))?}/', $targetName, $matches)) {
             $isRandom = true;
             $randomNumHasPadding = array_key_exists(2, $matches);
             $randomNumDigits = array_key_exists(3, $matches) ? $matches[3] : $randomNumDigits;
             $titleNumber = SFUtils::makeRandomNumber($randomNumDigits, $randomNumHasPadding);
         } else {
             if (preg_match('/{num.*start[_]*=[_]*([^;]*).*}/', $targetName, $matches)) {
                 // get unique number start value
                 // from target name; if it's not
                 // there, or it's not a positive
                 // number, start it out as blank
                 if (count($matches) == 2 && is_numeric($matches[1]) && $matches[1] >= 0) {
                     // the "start" value"
                     $titleNumber = $matches[1];
                 }
             } else {
                 if (preg_match('/^(_?{num.*}?)*$/', $targetName, $matches)) {
                     // the target name contains only underscores and number fields,
                     // i.e. would result in an empty title without the number set
                     $titleNumber = '1';
                 } else {
                     $titleNumber = '';
                 }
             }
         }
         // set target title
         $targetTitle = Title::newFromText(preg_replace('/{num.*}/', $titleNumber, $targetName));
         // if the specified target title is invalid, give up
         if (!$targetTitle instanceof Title) {
             throw new MWException(wfMessage('sf_autoedit_invalidtargetspecified', trim(preg_replace('/<unique number(.*)>/', $titleNumber, $targetNameFormula)))->parse());
         }
         // If title exists already, cycle through numbers for
         // this tag until we find one that gives a nonexistent
         // page title.
         // We cannot use $targetTitle->exists(); it does not use
         // Title::GAID_FOR_UPDATE, which is needed to get
         // correct data from cache; use
         // $targetTitle->getArticleID() instead.
         $numAttemptsAtTitle = 0;
         while ($targetTitle->getArticleID(Title::GAID_FOR_UPDATE) !== 0) {
             $numAttemptsAtTitle++;
             if ($isRandom) {
                 // If the set of pages is "crowded"
                 // already, go one digit higher.
                 if ($numAttemptsAtTitle > 20) {
                     $randomNumDigits++;
                 }
                 $titleNumber = SFUtils::makeRandomNumber($randomNumDigits, $randomNumHasPadding);
             } elseif ($titleNumber == "") {
                 $titleNumber = 2;
             } else {
                 $titleNumber = str_pad($titleNumber + 1, strlen($titleNumber), '0', STR_PAD_LEFT);
             }
             $targetTitle = Title::newFromText(preg_replace('/{num.*}/', $titleNumber, $targetName));
         }
         $targetName = $targetTitle->getPrefixedText();
     }
     return $targetName;
 }