class.ilADTDate.php

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<?php
 
class ilADTDate extends ilADT
{
        protected $value; // [ilDateTime]
        
        
        // definition
        
        protected function isValidDefinition(ilADTDefinition $a_def)
        {
                return ($a_def instanceof ilADTDateDefinition);
        }
        
        public function reset()
        {
                parent::reset();
                
                $this->value = null;
        }
        
        
        // properties
        
        public function setDate(ilDateTime $a_value = null)
        {               
                if($a_value && $a_value->isNull())
                {
                        $a_value = null;
                }
                $this->value = $a_value;
        }
        
        public function getDate()
        {
                return $this->value;
        }
        
        
        // comparison
        
        public function equals(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        if(!$this->isNull() && !$a_adt->isNull())
                        {
                                // could use checksum...
                                $value = $this->getDate()->get(IL_CAL_UNIX);
                                $other = $a_adt->getDate()->get(IL_CAL_UNIX);
                                return ($value == $other);
                        }                       
                }
                // null?
        }
                                
        public function isLarger(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        if(!$this->isNull() && !$a_adt->isNull())
                        {
                                $value = $this->getDate()->get(IL_CAL_UNIX);
                                $other = $a_adt->getDate()->get(IL_CAL_UNIX);
                                return ($value > $other);
                        }                       
                }
        }
 
        public function isSmaller(ilADT $a_adt)
        {
                if($this->getDefinition()->isComparableTo($a_adt))
                {
                        if(!$this->isNull() && !$a_adt->isNull())
                        {
                                $value = $this->getDate()->get(IL_CAL_UNIX);
                                $other = $a_adt->getDate()->get(IL_CAL_UNIX);
                                return ($value < $other);
                        }                       
                }
        }
        
        
        // null
        
        public function isNull()
        {               
                return (!($this->value instanceof ilDate) || $this->value->isNull());
        }
        
        
        // validation
        
        public function isValid()
        {
                $valid = parent::isValid();
                
                /* timestamp is "always" valid
                if(!$this->isNull())
                {
                        $value = getdate($this->getDate()->get(IL_CAL_UNIX));                   
                        if(!checkdate($value["mon"], $value["mday"], $value["year"]))
                        {
                                $valid = false;
                                $this->addValidationError(self::ADT_VALIDATION_DATE);
                        }
                }
                */
                
                return $valid;
        }
        
        
        // check
        
        public function getCheckSum()
        {
                if(!$this->isNull())
                {                       
                        return (string)$this->getDate()->get(IL_CAL_UNIX);
                }
        }       
}
 
?>