silverstripe-framework/forms/SingleSelectField.php

124 lines
2.6 KiB
PHP

<?php
/**
* Represents the base class for a single-select field
*/
abstract class SingleSelectField extends SelectField {
/**
* Show the first <option> element as empty (not having a value),
* with an optional label defined through {@link $emptyString}.
* By default, the <select> element will be rendered with the
* first option from {@link $source} selected.
*
* @var bool
*/
protected $hasEmptyDefault = false;
/**
* The title shown for an empty default selection,
* e.g. "Select...".
*
* @var string
*/
protected $emptyString = '';
protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_SINGLESELECT;
/**
* @param boolean $bool
* @return self Self reference
*/
public function setHasEmptyDefault($bool) {
$this->hasEmptyDefault = $bool;
return $this;
}
/**
* @return bool
*/
public function getHasEmptyDefault() {
return $this->hasEmptyDefault;
}
/**
* Set the default selection label, e.g. "select...".
* Defaults to an empty string. Automatically sets
* {@link $hasEmptyDefault} to true.
*
* @param string $string
*/
public function setEmptyString($string) {
$this->setHasEmptyDefault(true);
$this->emptyString = $string;
return $this;
}
/**
* @return string
*/
public function getEmptyString() {
return $this->emptyString;
}
/**
* Gets the source array, including the empty string, if present
*
* @return array|ArrayAccess
*/
public function getSourceEmpty() {
// Inject default option
if($this->getHasEmptyDefault()) {
return array('' => $this->getEmptyString()) + $this->getSource();
} else {
return $this->getSource();
}
}
/**
* Validate this field
*
* @param Validator $validator
* @return bool
*/
public function validate($validator) {
// Check if valid value is given
$selected = $this->Value();
if(strlen($selected)) {
// Use selection rules to check which are valid
foreach($this->getValidValues() as $formValue) {
if($this->isSelectedValue($formValue, $selected)) {
return true;
}
}
} else {
if ($this->getHasEmptyDefault()) {
// Check empty value
return true;
}
$selected = '(none)';
}
// Fail
$validator->validationError(
$this->name,
_t(
'DropdownField.SOURCE_VALIDATION',
"Please select a value within the list provided. {value} is not a valid option",
array('value' => $selected)
),
"validation"
);
return false;
}
public function castedCopy($classOrCopy) {
$field = parent::castedCopy($classOrCopy);
if($field instanceof SingleSelectField && $this->getHasEmptyDefault()) {
$field->setEmptyString($this->getEmptyString());
}
return $field;
}
}