root / class / FormValidator.class.php @ f0cea9c4
| 1 |
<?php
|
|---|---|
| 2 |
|
| 3 |
class FieldValidationError extends Exception {} |
| 4 |
|
| 5 |
class FormValidator { |
| 6 |
/* A tool to validate the parameters of a request (GET/POST) against a set
|
| 7 |
* of rules.
|
| 8 |
*
|
| 9 |
**/
|
| 10 |
private $errors; |
| 11 |
private $sanitized; |
| 12 |
public static $validator; |
| 13 |
public static $field_validators; |
| 14 |
private $format; |
| 15 |
|
| 16 |
public function __construct($format) { |
| 17 |
$this->errors = array(); |
| 18 |
$this->sanitized = array(); |
| 19 |
$this->format = $format; |
| 20 |
} |
| 21 |
|
| 22 |
public function validate($request) { |
| 23 |
/** Validate the given request
|
| 24 |
* value dict against the validator rules.
|
| 25 |
*
|
| 26 |
* @param $request a dict like $_REQUEST, $_GET or $_POST
|
| 27 |
* @returns true if valid, false else.
|
| 28 |
*/
|
| 29 |
$this->errors = array(); |
| 30 |
$sanitized = array(); |
| 31 |
foreach($this->format as $fieldname => $validators) { |
| 32 |
$err = false; |
| 33 |
$sanitized_f = false; |
| 34 |
foreach($validators as $validator) { |
| 35 |
if ($validator == 'required') { |
| 36 |
if (! isset($request[$fieldname])) { |
| 37 |
$err = 'n\'est pas renseigné'; |
| 38 |
break;
|
| 39 |
} else {
|
| 40 |
$sanitized_f = $request[$fieldname]; |
| 41 |
} |
| 42 |
} else {
|
| 43 |
if (isset($request[$fieldname]) and $request[$fieldname]) { |
| 44 |
$val = $request[$fieldname]; |
| 45 |
try {
|
| 46 |
$sanitized_f = $this->validate_field($validator, $val); |
| 47 |
} catch (FieldValidationError $e) { |
| 48 |
$err = $e->getMessage(); |
| 49 |
break;
|
| 50 |
} |
| 51 |
} |
| 52 |
} |
| 53 |
} |
| 54 |
if ($err) { |
| 55 |
$this->errors[$fieldname] = $err; |
| 56 |
} else {
|
| 57 |
$sanitized[$fieldname] = $sanitized_f; |
| 58 |
} |
| 59 |
} |
| 60 |
$this->sanitized = $sanitized; |
| 61 |
return (count($this->errors) == 0); |
| 62 |
} |
| 63 |
|
| 64 |
public function validate_field($validator, $content) { |
| 65 |
/** Returns sanitized value if ok, throws a FieldValidationError otherwise
|
| 66 |
*/
|
| 67 |
if (isset(self::$field_validators[$validator])) { |
| 68 |
$f = self::$field_validators[$validator]; |
| 69 |
return $f($content); |
| 70 |
} else {
|
| 71 |
throw new FieldValidationError("'$validator' validator does not exist"); |
| 72 |
} |
| 73 |
} |
| 74 |
|
| 75 |
public function errors() { |
| 76 |
/** An associative array form-key => error
|
| 77 |
*/
|
| 78 |
return $this->errors; |
| 79 |
} |
| 80 |
|
| 81 |
public function sane_values() { |
| 82 |
return $this->sanitized; |
| 83 |
} |
| 84 |
|
| 85 |
public function print_errors() { |
| 86 |
/** raw & quick HTML errors printing, for case that shouldn't happen to users.
|
| 87 |
*/
|
| 88 |
echo '<pre>'; |
| 89 |
var_dump($this->errors()); |
| 90 |
echo '</pre>'; |
| 91 |
} |
| 92 |
|
| 93 |
public static function register($name, $function) { |
| 94 |
self::$field_validators[$name] = $function; |
| 95 |
} |
| 96 |
} |
| 97 |
FormValidator::$field_validators = array(); |
| 98 |
|
| 99 |
|
| 100 |
FormValidator::register(
|
| 101 |
'numeric',
|
| 102 |
function ($v) { |
| 103 |
$sanitized = floatval($v); |
| 104 |
if (($sanitized === false) || (!is_numeric($v))) { |
| 105 |
throw new FieldValidationError('n\'est pas une valeur numérique'); |
| 106 |
} else {
|
| 107 |
return $sanitized; |
| 108 |
} |
| 109 |
} |
| 110 |
); |
| 111 |
|
| 112 |
FormValidator::register(
|
| 113 |
'positive',
|
| 114 |
function ($v) { |
| 115 |
if ($v < 0) { |
| 116 |
throw new FieldValidationError('est négatif'); |
| 117 |
} else {
|
| 118 |
return floatval($v); |
| 119 |
} |
| 120 |
} |
| 121 |
); |
| 122 |
// Intended to validate checkbox which takes NULL for unchecked
|
| 123 |
FormValidator::register(
|
| 124 |
'boolean',
|
| 125 |
function ($v) { |
| 126 |
if ($v == NULL) { |
| 127 |
return false; |
| 128 |
} else {
|
| 129 |
return true; |
| 130 |
} |
| 131 |
} |
| 132 |
); |
| 133 |
|
| 134 |
// Validate that it is not a file path
|
| 135 |
FormValidator::register(
|
| 136 |
'basename',
|
| 137 |
function ($v) { |
| 138 |
if (!strpos($v, '/') && !strpos($v, '\\')) { |
| 139 |
return $v; |
| 140 |
} else {
|
| 141 |
throw new FieldValidationError('est un chemin'); |
| 142 |
} |
| 143 |
} |
| 144 |
); |
| 145 |
|
| 146 |
|
| 147 |
?>
|