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<?php
namespace MediaWiki\HTMLForm\Field;
use MediaWiki\Html\Html;
use MediaWiki\HTMLForm\HTMLFormField;
use MediaWiki\HTMLForm\HTMLNestedFilterable;
use MediaWiki\HTMLForm\OOUIHTMLForm;
use MediaWiki\Request\WebRequest;
use MediaWiki\Widget\MenuTagMultiselectWidget;
use RuntimeException;
/**
* Multi-select field
*
* @stable to extend
*/
class HTMLMultiSelectField extends HTMLFormField implements HTMLNestedFilterable {
private bool $mDropdown = false;
private ?string $mPlaceholder = null;
/**
* @stable to call
*
* @param array $params
* In adition to the usual HTMLFormField parameters, this can take the following fields:
* - dropdown: If given, the options will be displayed inside a dropdown with a text field that
* can be used to filter them. This is desirable mostly for very long lists of options.
* This only works for users with JavaScript support and falls back to the list of checkboxes.
* - flatlist: If given, the options will be displayed on a single line (wrapping to following
* lines if necessary), rather than each one on a line of its own. This is desirable mostly
* for very short lists of concisely labelled options.
* - max: Maximum number of elements that can be selected. On the client-side, this is only
* enforced when using a dropdown.
*/
public function __construct( $params ) {
parent::__construct( $params );
// If the disabled-options parameter is not provided, use an empty array
if ( !isset( $this->mParams['disabled-options'] ) ) {
$this->mParams['disabled-options'] = [];
}
if ( isset( $params['dropdown'] ) ) {
$this->mDropdown = true;
if ( isset( $params['placeholder'] ) ) {
$this->mPlaceholder = $params['placeholder'];
} elseif ( isset( $params['placeholder-message'] ) ) {
$this->mPlaceholder = $this->msg( $params['placeholder-message'] )->text();
}
}
if ( isset( $params['flatlist'] ) ) {
$this->mClass .= ' mw-htmlform-flatlist';
}
}
/**
* @inheritDoc
* @stable to override
*/
public function validate( $value, $alldata ) {
$p = parent::validate( $value, $alldata );
if ( $p !== true ) {
return $p;
}
if ( !is_array( $value ) ) {
return false;
}
// Reject nested arrays (T274955)
$value = array_filter( $value, 'is_scalar' );
if ( isset( $this->mParams['required'] )
&& $this->mParams['required'] !== false
&& $value === []
) {
return $this->msg( 'htmlform-required' );
}
if ( isset( $this->mParams['max'] ) && ( count( $value ) > $this->mParams['max'] ) ) {
return $this->msg( 'htmlform-multiselect-toomany', $this->mParams['max'] );
}
# If all options are valid, array_intersect of the valid options
# and the provided options will return the provided options.
$validOptions = HTMLFormField::flattenOptions( $this->getOptions() );
$validValues = array_intersect( $value, $validOptions );
if ( count( $validValues ) == count( $value ) ) {
return true;
} else {
return $this->msg( 'htmlform-select-badoption' );
}
}
/**
* @inheritDoc
* @stable to override
*/
public function getInputHTML( $value ) {
$value = HTMLFormField::forceToStringRecursive( $value );
$html = $this->formatOptions( $this->getOptions(), $value );
return $html;
}
/**
* @stable to override
*
* @param array $options
* @param mixed $value
*
* @return string
*/
public function formatOptions( $options, $value ) {
$html = '';
$attribs = $this->getAttributes( [ 'disabled', 'tabindex' ] );
foreach ( $options as $label => $info ) {
if ( is_array( $info ) ) {
$html .= Html::rawElement( 'h1', [], $label ) . "\n";
$html .= $this->formatOptions( $info, $value );
} else {
$thisAttribs = [
'id' => "{$this->mID}-$info",
'value' => $info,
];
if ( in_array( $info, $this->mParams['disabled-options'], true ) ) {
$thisAttribs['disabled'] = 'disabled';
}
$checked = in_array( $info, $value, true );
$checkbox = $this->getOneCheckbox( $checked, $attribs + $thisAttribs, $label );
$html .= ' ' . Html::rawElement(
'div',
[ 'class' => 'mw-htmlform-flatlist-item' ],
$checkbox
);
}
}
return $html;
}
protected function getOneCheckbox( $checked, $attribs, $label ) {
if ( $this->mParent instanceof OOUIHTMLForm ) {
throw new RuntimeException( __METHOD__ . ' is not supported' );
} else {
$checkbox =
Html::check( "{$this->mName}[]", $checked, $attribs ) .
"\u{00A0}" .
Html::rawElement(
'label',
[ 'for' => $attribs['id'] ],
$this->escapeLabel( $label )
);
return $checkbox;
}
}
public function getOptionsOOUI() {
$optionsOouiSections = [];
$options = $this->getOptions();
// If the options are supposed to be split into sections, each section becomes a separate
// CheckboxMultiselectInputWidget.
foreach ( $options as $label => $section ) {
if ( is_array( $section ) ) {
$optionsOouiSections[ $label ] = Html::listDropdownOptionsOoui( $section );
unset( $options[$label] );
}
}
// If anything remains in the array, they are sectionless options. Put them at the beginning.
if ( $options ) {
$optionsOouiSections = array_merge(
[ '' => Html::listDropdownOptionsOoui( $options ) ],
$optionsOouiSections
);
}
return $optionsOouiSections;
}
/**
* Get the OOUI version of this field.
*
* Returns OOUI\CheckboxMultiselectInputWidget for fields that only have one section,
* string otherwise.
*
* @stable to override
* @since 1.28
* @param string[] $value
* @return \OOUI\Widget|string
* @suppress PhanParamSignatureMismatch
*/
public function getInputOOUI( $value ) {
$this->mParent->getOutput()->addModules( 'oojs-ui-widgets' );
if ( $this->mDropdown ) {
$this->mParent->getOutput()->addModuleStyles( 'mediawiki.widgets.TagMultiselectWidget.styles' );
}
// Reject nested arrays (T274955)
$value = array_filter( $value, 'is_scalar' );
$out = [];
$optionsSections = $this->getOptionsOOUI();
foreach ( $optionsSections as $sectionLabel => &$groupedOptions ) {
$attr = [];
$attr['name'] = "{$this->mName}[]";
$attr['value'] = $value;
foreach ( $groupedOptions as &$option ) {
$option['disabled'] = in_array( $option['data'], $this->mParams['disabled-options'], true );
}
foreach ( $groupedOptions as &$option ) {
$option['label'] = $this->makeLabelSnippet( $option['label'] );
}
unset( $option );
$attr['options'] = $groupedOptions;
$attr += \OOUI\Element::configFromHtmlAttributes(
$this->getAttributes( [ 'disabled', 'tabindex' ] )
);
if ( $this->mClass !== '' ) {
$attr['classes'] = [ $this->mClass ];
}
$widget = new \OOUI\CheckboxMultiselectInputWidget( $attr );
if ( $sectionLabel ) {
$out[] = new \OOUI\FieldsetLayout( [
'items' => [ $widget ],
'label' => $this->makeLabelSnippet( $sectionLabel ),
] );
} else {
$out[] = $widget;
}
}
unset( $groupedOptions );
$params = [];
if ( $this->mPlaceholder ) {
$params['placeholder'] = $this->mPlaceholder;
}
if ( isset( $this->mParams['max'] ) ) {
$params['tagLimit'] = $this->mParams['max'];
}
if ( $this->mDropdown ) {
return new MenuTagMultiselectWidget( [
'name' => $this->mName,
'options' => $optionsSections,
'default' => $value,
'noJsFallback' => $out,
'allowReordering' => false,
] + $params );
} elseif ( count( $out ) === 1 ) {
$firstFieldData = $out[0]->getData() ?: [];
$out[0]->setData( $firstFieldData + $params );
// Directly return the only OOUI\CheckboxMultiselectInputWidget.
// This allows it to be made infusable and later tweaked by JS code.
return $out[0];
}
return implode( '', $out );
}
protected function getOOUIModules() {
return $this->mDropdown ? [ 'mediawiki.widgets.MenuTagMultiselectWidget' ] : [];
}
protected function shouldInfuseOOUI() {
return $this->mDropdown;
}
/**
* @stable to override
* @param WebRequest $request
*
* @return string|array
*/
public function loadDataFromRequest( $request ) {
$fromRequest = $request->getArray( $this->mName, [] );
// Fetch the value in either one of the two following case:
// - we have a valid submit attempt (form was just submitted)
// - we have a value (an URL manually built by the user, or GET form with no wpFormIdentifier)
if ( $this->isSubmitAttempt( $request ) || $fromRequest ) {
// Checkboxes are just not added to the request arrays if they're not checked,
// so it's perfectly possible for there not to be an entry at all
// @phan-suppress-next-line PhanTypeMismatchReturnNullable getArray does not return null
return $fromRequest;
} else {
// That's ok, the user has not yet submitted the form, so show the defaults
return $this->getDefault();
}
}
/**
* @inheritDoc
* @stable to override
*/
public function getDefault() {
return $this->mDefault ?? [];
}
/**
* @inheritDoc
* @stable to override
*/
public function filterDataForSubmit( $data ) {
$data = HTMLFormField::forceToStringRecursive( $data );
$options = HTMLFormField::flattenOptions( $this->getOptions() );
$forcedOn = array_intersect( $this->mParams['disabled-options'], $this->getDefault() );
$res = [];
foreach ( $options as $opt ) {
$res["$opt"] = in_array( $opt, $forcedOn, true ) || in_array( $opt, $data, true );
}
return $res;
}
/**
* @inheritDoc
* @stable to override
*/
protected function needsLabel() {
return false;
}
}
/** @deprecated class alias since 1.42 */
class_alias( HTMLMultiSelectField::class, 'HTMLMultiSelectField' );