class.ilADTMultiText.php

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<?php

class ilADTMultiText extends ilADT
{
        protected $values; // [array]
        
        
        // definition
        
        protected function isValidDefinition(ilADTDefinition $a_def)
        {
                return ($a_def instanceof ilADTMultiTextDefinition);
        }
        
        public function reset()
        {
                parent::reset();
                
                $this->values = null;
        }
        
        
        // properties
        
        public function setTextElements(array $a_values = null)
        {               
                if(is_array($a_values))
                {
                        if(sizeof($a_values))
                        {
                                foreach($a_values as $idx => $element)
                                {
                                        $a_values[$idx]= trim($element);
                                        if(!$a_values[$idx])
                                        {
                                                unset($a_values[$idx]);
                                        }
                                }
                                $a_values = array_unique($a_values);
                        }
                        if(!sizeof($a_values))
                        {
                                $a_values = null;
                        }
                }
                $this->values = $a_values;
        }
        
        public function getTextElements()
        {
                return $this->values;
        }
        
        
        // comparison
        
        public function equals(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        return ($this->getCheckSum() == $a_adt->getCheckSum());
                }
        }
                                
        public function isLarger(ilADT $a_adt)
        {
                // return null?
        }

        public function isSmaller(ilADT $a_adt)
        {
                // return null?
        }
        
        
        // null
        
        public function isNull()
        {               
                $all = $this->getTextElements();
                return (!is_array($all) || !sizeof($all));
        }
        
        
        // validation
        
        public function isValid()
        {
                $valid = parent::isValid();
                
                if(!$this->isNull())
                {
                        $max_size = $this->getDefinition()->getMaxSize();
                        if($max_size && $max_size < sizeof($this->getTextElements()))
                        {
                                $valid = false;
                                $this->addValidationError(self::ADT_VALIDATION_ERROR_MAX_SIZE);
                        }

                        $max_len = $this->getDefinition()->getMaxLength();
                        if($max_len)
                        {
                                foreach($this->getTextElements() as $element)
                                {
                                        if($max_len < strlen($element))
                                        {
                                                $valid = false;
                                                $this->addValidationError(self::ADT_VALIDATION_ERROR_MAX_LENGTH);
                                        }
                                }
                        }
                }
                        
                return $valid;
        }
        
        
        // check
        
        public function getCheckSum()
        {
                if(!$this->isNull())
                {
                        $elements = $this->getTextElements();
                        sort($elements);
                        return md5(implode("", $elements));
                }
        }       
}

?>