[TYPO3-ect] recursive pid function for tx_div

[Steve Ryan]

> 
> Something lost here?
> 
>> $pidQuery='(pid='.implode(' or pid=',$pidList).')';
> 
> Maybe?
> 
> $pidQuery='( 0 '.implode(' or pid=',$pidList).')';
> 
as long as there is one element in the array of pids, the first is OK
(updated code below ensures one element or returns empty array)

> 
>> $cObj=$this->findCObject();
> 
> Leads to another idea for tx_div:
> 
> function findCObjectSingleton() {
>   static $cObject;
>   if(!is_object($cObject)) {
>         // create it here
>   }
>   return $cObject;
> }
> 
> Does this work as expected?
> 
> 


More or less
The static variable needs to be in the scope of the class
eg

class tx_markablequiz_controller {
   	static $cObj ;
	
	static function findCObjectSingleton() {
		if(!is_object(self::$cObj)) {
			self::$cObj=t3lib_div::makeInstance('tslib_cObj');
			debug(array('creating cobj'));
		}
		debug(array('returning cobj'));
		return self::$cObj;
	
	}
    static function plr($pidList,$recursive) {
	    // ensure array format
	    if (!is_array($pidList)) {
		    $pidList=explode(',',$pidList);
	    }
	    // dump when recursion reaches 0
	    if ($recursive==0) {
		    return $pidList;
	    } else {
		// prep unique array
		$unique=array();
		foreach ($pidList as $thispid) {
			// check for +ve integer
			if ($thispid>0) $unique[$thispid]=$thispid;	
		}
		$newTally=0;
		if (count($unique)>0) {
			// get next level of pids
			$pidQuery='(pid='.implode(' or pid=',array_keys($unique)).')';
			$cObj=tx_markablequiz_controller::findCObjectSingleton();
			$query=$pidQuery.$cObj->enableFields('pages');
		
$res=$GLOBALS['TYPO3_DB']->exec_SELECTquery('uid,pid','pages',$query,'','','');
			while ($row=$GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)) {
				$unique[$row['uid']]=$row['uid'];
				$newTally++;
			}
			
			// no results, bail on recursion now
			if ($newTally>0) { 	
				return
tx_markablequiz_controller::plr(array_keys($unique),$recursive-1);
			} else {
				return array_keys($unique);
			}
		} else {
			return array();
		}
	    }
    }



Steve