<?
class Validator
{
	public $errors; // A variable to store a list of error messages

	// Validate something's been entered
	public function validateGeneral($theinput,$description = '')
	{
		if (trim($theinput) != "")
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false;
		}
	}
	
	// Validate text only - supports unicode characters
	public function validateTextOnly($theinput,$description = '')
	{
		$result = preg_match("/^[\p{L}\p{N}\ ]+$/u", $theinput );
		if ($result)
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false; 
		}
	}

	// Validate text only, no spaces allowed - supports unicode characters
	public function validateTextOnlyNoSpaces($theinput,$description = '')
	{
		$result = preg_match ("/^[\p{L}\p{N}]+$/u", $theinput );
		
		if ($result)
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false; 
		}
	}
		
	// Validate email address
	public function validateEmail($theinput, $description = '')
	{
		$result = preg_match( "/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/", $theinput );
		if ($result)
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false; 
		}
	}
	
	// Validate numbers only (integer, floating signed or unsigned)
	public function validateNumber($theinput,$description = '')
	{
		if (is_numeric($theinput)) {
			return true; // The value is numeric, return true
		}
		else
		{ 
			$this->errors[] = $description; // Value not numeric! Add error description to list of errors
			return false; // Return false
		}
	}
	
	// Validate date
	public function validateDate($thedate,$description = '')
	{
		if (strtotime($thedate) == false || $thedate == '')
		{
			$this->errors[] = $description;
			return false;
		}
		else
		{
			return true;
		}
	}
	
	public function validateEnglishDate($thedate,$description = '')
	{
		if (preg_match("/^\d\d\d\d-[0-1]\d-[0-3]\d$/",$thedate))
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false;
		}
	}

	public function validateEnglishDateTime($thedate,$description = '')
	{
		if (preg_match("/^\d\d\d\d-[0-1]\d-[0-3]\d[ ][0-2]\d:[0-5]\d:[0-5]\d$/",$thedate))
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false;
		}
	}
	
	public function validateGreekDate($thedate,$description = '')
	{
		if (preg_match("/^[0-3]\d-[0-1]\d-\d\d\d\d$/",$thedate))
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false;
		}
	}
	
	public function validateGreekDateTime($thedate,$description = '')
	{
		if (preg_match("/^[0-3]\d-[0-1]\d-\d\d\d\d[ ][0-2]\d:[0-5]\d:[0-5]\d$/",$thedate))
		{
			return true;
		}
		else
		{
			$this->errors[] = $description;
			return false;
		}
	}
	
	// Check whether any errors have been found (i.e. validation has returned false)
	// since the object was created
	public function foundErrors()
	{
		if (count($this->errors) > 0)
		{
			return true;
		}
		else
		{
			return false;
		}
	}

	// Return a string containing a list of errors found,
	// Seperated by a given deliminator
	public function listErrors($delim = ' ')
	{
		return implode($delim,$this->errors);
	}
	
	// Manually add something to the list of errors
	function addError($description)
	{
		$this->errors[] = $description;
	}	
}
?>