root / class / FormValidator.class.php @ dbd2521a
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<?php
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class FieldValidationError extends Exception {} |
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class FormValidator { |
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/* A tool to validate the parameters of a request (GET/POST) against a set
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* of rules.
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*
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**/
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private $errors; |
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private $sanitized; |
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public static $validator; |
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public static $field_validators; |
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private $format; |
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public function __construct($format) { |
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$this->errors = array(); |
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$this->sanitized = array(); |
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$this->format = $format; |
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} |
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public function validate($request) { |
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/** Validate the given request
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* value dict against the validator rules.
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*
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* @param $request a dict like $_REQUEST, $_GET or $_POST
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* @returns true if valid, false else.
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*/
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$this->errors = array(); |
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$sanitized = array(); |
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foreach($this->format as $fieldname => $validators) { |
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$err = false; |
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$sanitized_f = false; |
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foreach($validators as $validator) { |
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if ($validator == 'required') { |
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if (! isset($request[$fieldname])) { |
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$err = 'n\'est pas renseigné'; |
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break;
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} else {
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$sanitized_f = $request[$fieldname]; |
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} |
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} else {
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if (isset($request[$fieldname]) and $request[$fieldname]) { |
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$val = $request[$fieldname]; |
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try {
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$sanitized_f = $this->validate_field($validator, $val); |
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} catch (FieldValidationError $e) { |
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$err = $e->getMessage(); |
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break;
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} |
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} |
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} |
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} |
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if ($err) { |
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$this->errors[$fieldname] = $err; |
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} else {
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$sanitized[$fieldname] = $sanitized_f; |
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} |
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} |
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$this->sanitized = $sanitized; |
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return (count($this->errors) == 0); |
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} |
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public function validate_field($validator, $content) { |
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/** Returns sanitized value if ok, throws a FieldValidationError otherwise
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*/
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if (isset(self::$field_validators[$validator])) { |
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$f = self::$field_validators[$validator]; |
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return $f($content); |
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} else {
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throw new FieldValidationError("'$validator' validator does not exist"); |
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} |
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} |
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public function errors() { |
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/** An associative array form-key => error
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*/
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return $this->errors; |
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} |
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public function sane_values() { |
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return $this->sanitized; |
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} |
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public function print_errors() { |
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/** raw & quick HTML errors printing, for case that shouldn't happen to users.
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*/
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echo '<pre>'; |
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var_dump($this->errors()); |
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echo '</pre>'; |
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} |
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public static function register($name, $function) { |
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self::$field_validators[$name] = $function; |
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} |
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} |
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FormValidator::$field_validators = array(); |
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FormValidator::register(
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'numeric',
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function ($v) { |
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$sanitized = floatval($v); |
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if (($sanitized === false) || (!is_numeric($v))) { |
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throw new FieldValidationError('n\'est pas une valeur numérique'); |
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} else {
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return $sanitized; |
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} |
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} |
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); |
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FormValidator::register(
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'positive',
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function ($v) { |
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if ($v < 0) { |
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throw new FieldValidationError('est négatif'); |
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} else {
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return floatval($v); |
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} |
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} |
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); |
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// Intended to validate checkbox which takes NULL for unchecked
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FormValidator::register(
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'boolean',
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function ($v) { |
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if ($v == NULL) { |
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return false; |
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} else {
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return true; |
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} |
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} |
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); |
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// Validate that it is not a file path
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FormValidator::register(
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'basename',
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function ($v) { |
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if (!strpos($v, '/') && !strpos($v, '\\')) { |
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return $v; |
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} else {
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throw new FieldValidationError('est un chemin'); |
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} |
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} |
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); |
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?>
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