silverstripe-framework/src/Forms/RequiredFields.php

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<?php
namespace SilverStripe\Forms;
use SilverStripe\ORM\ArrayLib;
/**
* Required Fields allows you to set which fields need to be present before
* submitting the form. Submit an array of arguments or each field as a separate
* argument.
*
* Validation is performed on a field by field basis through
* {@link FormField::validate}.
*/
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class RequiredFields extends Validator
{
/**
* List of required fields
*
* @var array
*/
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protected $required;
/**
* Pass each field to be validated as a seperate argument to the constructor
* of this object. (an array of elements are ok).
*/
public function __construct()
{
$required = func_get_args();
if (isset($required[0]) && is_array($required[0])) {
$required = $required[0];
}
if (!empty($required)) {
$this->required = ArrayLib::valuekey($required);
} else {
$this->required = array();
}
parent::__construct();
}
/**
* Clears all the validation from this object.
*
* @return RequiredFields
*/
public function removeValidation()
{
$this->required = array();
return $this;
}
/**
* Debug helper
*/
public function debug()
{
if (!is_array($this->required)) {
return false;
}
$result = "<ul>";
foreach ($this->required as $name) {
$result .= "<li>$name</li>";
}
$result .= "</ul>";
return $result;
}
/**
* Allows validation of fields via specification of a php function for
* validation which is executed after the form is submitted.
*
* @param array $data
*
* @return boolean
*/
public function php($data)
{
$valid = true;
$fields = $this->form->Fields();
foreach ($fields as $field) {
$valid = ($field->validate($this) && $valid);
}
if (!$this->required) {
return $valid;
}
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foreach ($this->required as $fieldName) {
if (!$fieldName) {
continue;
}
if ($fieldName instanceof FormField) {
$formField = $fieldName;
$fieldName = $fieldName->getName();
} else {
$formField = $fields->dataFieldByName($fieldName);
}
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// submitted data for file upload fields come back as an array
$value = isset($data[$fieldName]) ? $data[$fieldName] : null;
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if (is_array($value)) {
if ($formField instanceof FileField && isset($value['error']) && $value['error']) {
$error = true;
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} else {
$error = (count($value)) ? false : true;
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}
} else {
// assume a string or integer
$error = (strlen($value)) ? false : true;
}
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if ($formField && $error) {
$errorMessage = _t(
'Form.FIELDISREQUIRED',
'{name} is required',
array(
'name' => strip_tags(
'"' . ($formField->Title() ? $formField->Title() : $fieldName) . '"'
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)
)
);
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if ($msg = $formField->getCustomValidationMessage()) {
$errorMessage = $msg;
}
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$this->validationError(
$fieldName,
$errorMessage,
"required"
);
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$valid = false;
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}
}
return $valid;
}
/**
* Adds a single required field to required fields stack.
*
* @param string $field
*
* @return RequiredFields
*/
public function addRequiredField($field)
{
$this->required[$field] = $field;
return $this;
}
/**
* Removes a required field
*
* @param string $field
*
* @return RequiredFields
*/
public function removeRequiredField($field)
{
unset($this->required[$field]);
return $this;
}
/**
* Add {@link RequiredField} objects together
*
* @param RequiredFields $requiredFields
* @return RequiredFields
*/
public function appendRequiredFields($requiredFields)
{
$this->required = $this->required + ArrayLib::valuekey(
$requiredFields->getRequired()
);
return $this;
}
/**
* Returns true if the named field is "required".
*
* Used by {@link FormField} to return a value for FormField::Required(),
* to do things like show *s on the form template.
*
* @param string $fieldName
*
* @return boolean
*/
public function fieldIsRequired($fieldName)
{
return isset($this->required[$fieldName]);
}
/**
* Return the required fields
*
* @return array
*/
public function getRequired()
{
return array_values($this->required);
}
}