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<?php
/*
* Validation class.
*/
class validation
{
/**
* Class constants.
*
* @author Nesbert Hidalgo
* @access public
*/
const FIELD_NAME = '@@field_name@@';
const VALUE = '@@value@@';
public function __construct(&$errors)
{
$this->errors = $errors;
}
/**
* Base function to validate by boolean value.
*
* @author Nesbert Hidalgo
* @access private
* @param bool $bool required
* @param string $field required
* @param mixed $val required
* @param string $msg optional
* @param string $required optional
* @return bool
*/
private function validate_field_by_bool($bool, $field, $val, $msg = null, $required = false)
{
switch ( true ) {
case ( $required && $val && $bool ):
case ( !$required && $val && $bool ):
case ( !$required && !$val ):
return true;
break;
default:
$this->errors->add($field, $msg);
return false;
break;
}
}
/**
* Format error message by adding fieldname or value we needed
*
* @author Nesbert Hidalgo
* @access private
* @param string $field required
* @param mixed $val required
* @param string $msg required
* @param string $default_msg required
* @return string
*/
private function format_message($field, $val, $msg, $default_msg)
{
$message = $msg ? $msg : $default_msg;
// check for fieldname and humanze it
if ( strstr($message, self::FIELD_NAME) ) {
$message = str_replace(self::FIELD_NAME, humanize($field), $message);
}
// check for value and insert it into the message
if ( strstr($message, self::VALUE) ) {
$message = str_replace(self::VALUE, $val, $message);
}
return $message;
}
/**
* Validates that $val is not empty.
*
* @author Nesbert Hidalgo
* @access public
* @param string $field required
* @param mixed $val required
* @param string $msg optional default is "... is a required field."
* @return bool
*/
public function validates_presence_of($field, $val, $msg = null)
{
return self::validate_field_by_bool(true, $field, trim($val), self::format_message($field, $val, $msg, self::FIELD_NAME." is a required field."), true);
}
/**
* Validates $val with a regular expression $pattern using preg_match().
*
* @author Nesbert Hidalgo
* @access public
* @param string $field required
* @param mixed $val required
* @param string $msg optional default is "... is invalid."
* @param bool $required default is false
* @param string $pattern required regular expression
* @return bool
*/
public function validates_format_of($field, $val, $msg = null, $required = false, $pattern = false)
{
return self::validate_field_by_bool(preg_match($pattern, $val), $field, $val, self::format_message($field, $val, $msg, self::FIELD_NAME." is invalid."), $required);
}
/**
* Validates that $val is a valid email address.
*
* @author Nesbert Hidalgo
* @access public
* @param string $field required
* @param mixed $val required
* @param string $msg optional default is "... is an invalid email address."
* @param bool $required optional default is false
* @return bool
*/
public function validates_email_of($field, $val, $msg = null, $required = false)
{
return self::validate_field_by_bool(is_email($val), $field, $val, self::format_message($field, $val, $msg, self::FIELD_NAME." is an invalid email address."), $required);
}
/**
* Validates that $val is numeric.
*
* @author Nesbert Hidalgo
* @access public
* @param string $field required
* @param mixed $val required
* @param string $msg optional default is "... is not a number."
* @param bool $required optional default is false
* @return bool
*/
public function validates_numericality_of($field, $val, $msg = null, $required = false)
{
return self::validate_field_by_bool(is_number($val), $field, $val, self::format_message($field, $val, $msg, self::FIELD_NAME." is not a number."), $required);
}
}
?>
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