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String field validator supports empty strings

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It is possible to create a field validator that will make an exception
from the minimal length if the string is empty. And by "make an
exception", I don't mean "throwing one".
This commit is contained in:
Emmanuel BENOîT 2012-02-05 23:03:18 +01:00
parent b80ac7ee91
commit f80d739f5d
1 changed files with 4 additions and 2 deletions
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6
includes/form/validators.inc.php
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@ -7,20 +7,22 @@ class Validator_StringLength
protected $errorPrefix; protected $errorPrefix;
protected $minLength; protected $minLength;
protected $maxLength; protected $maxLength;
protected $allowEmpty;
public function __construct( $errorPrefix , $minLength = 0 , $maxLength = null ) public function __construct( $errorPrefix , $minLength = 0 , $maxLength = null , $allowEmpty = false )
{ {
assert( $maxLength === null || $maxLength >= $minLength ); assert( $maxLength === null || $maxLength >= $minLength );
$this->errorPrefix = $errorPrefix; $this->errorPrefix = $errorPrefix;
$this->minLength = $minLength; $this->minLength = $minLength;
$this->maxLength = $maxLength; $this->maxLength = $maxLength;
$this->allowEmpty = $allowEmpty;
} }
public function validate( $value ) public function validate( $value )
{ {
$len = strlen( $value ); $len = strlen( $value );
if ( $len < $this->minLength ) { if ( $len < $this->minLength && ( $len != 0 || ! $this->allowEmpty ) ) {
$template = Loader::Text( '%1$s is too short (min. %2$d characters)' ); $template = Loader::Text( '%1$s is too short (min. %2$d characters)' );
return array( sprintf( $template , $this->errorPrefix , $this->minLength ) ); return array( sprintf( $template , $this->errorPrefix , $this->minLength ) );
} }