HTMLMultiSelectField.php

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<?php

class HTMLMultiSelectField extends HTMLFormField implements HTMLNestedFilterable {
    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'] ) === false ) {
            $this->mParams['disabled-options'] = [];
        }

        if ( isset( $params['dropdown'] ) ) {
            $this->mClass .= ' mw-htmlform-dropdown';
        }

        if ( isset( $params['flatlist'] ) ) {
            $this->mClass .= ' mw-htmlform-flatlist';
        }
    }

    public function validate( $value, $alldata ) {
        $p = parent::validate( $value, $alldata );

        if ( $p !== true ) {
            return $p;
        }

        if ( !is_array( $value ) ) {
            return false;
        }

        # 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' );
        }
    }

    public function getInputHTML( $value ) {
        if ( isset( $this->mParams['dropdown'] ) ) {
            $this->mParent->getOutput()->addModules( 'jquery.chosen' );
        }

        $value = HTMLFormField::forceToStringRecursive( $value );
        $html = $this->formatOptions( $this->getOptions(), $value );

        return $html;
    }

    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 MWException( 'HTMLMultiSelectField#getOneCheckbox() is not supported' );
        } else {
            $elementFunc = [ Html::class, $this->mOptionsLabelsNotFromMessage ? 'rawElement' : 'element' ];
            $checkbox =
                Xml::check( "{$this->mName}[]", $checked, $attribs ) .
                "\u{00A0}" .
                call_user_func( $elementFunc,
                    'label',
                    [ 'for' => $attribs['id'] ],
                    $label
                );
            if ( $this->mParent->getConfig()->get( 'UseMediaWikiUIEverywhere' ) ) {
                $checkbox = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
                    $checkbox .
                    Html::closeElement( 'div' );
            }
            return $checkbox;
        }
    }

    public function getOptionsOOUI() {
        // Sections make this difficult. See getInputOOUI().
        throw new MWException( 'HTMLMultiSelectField#getOptionsOOUI() is not supported' );
    }

    public function getInputOOUI( $value ) {
        $this->mParent->getOutput()->addModules( 'oojs-ui-widgets' );

        $hasSections = false;
        $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 ] = Xml::listDropDownOptionsOoui( $section );
                unset( $options[$label] );
                $hasSections = true;
            }
        }
        // If anything remains in the array, they are sectionless options. Put them in a separate widget
        // at the beginning.
        if ( $options ) {
            $optionsOouiSections = array_merge(
                [ '' => Xml::listDropDownOptionsOoui( $options ) ],
                $optionsOouiSections
            );
        }

        $out = [];
        foreach ( $optionsOouiSections as $sectionLabel => $optionsOoui ) {
            $attr = [];
            $attr['name'] = "{$this->mName}[]";

            $attr['value'] = $value;
            $attr['options'] = $optionsOoui;

            foreach ( $attr['options'] as &$option ) {
                $option['disabled'] = in_array( $option['data'], $this->mParams['disabled-options'], true );
            }
            if ( $this->mOptionsLabelsNotFromMessage ) {
                foreach ( $attr['options'] as &$option ) {
                    $option['label'] = new OOUI\HtmlSnippet( $option['label'] );
                }
            }

            $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' => new OOUI\HtmlSnippet( $sectionLabel ),
                ] );
            } else {
                $out[] = $widget;
            }
        }

        if ( !$hasSections ) {
            // 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 );
    }

    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
            return $fromRequest;
        } else {
            // That's ok, the user has not yet submitted the form, so show the defaults
            return $this->getDefault();
        }
    }

    public function getDefault() {
        return $this->mDefault ?? [];
    }

    public function filterDataForSubmit( $data ) {
        $data = HTMLFormField::forceToStringRecursive( $data );
        $options = HTMLFormField::flattenOptions( $this->getOptions() );

        $res = [];
        foreach ( $options as $opt ) {
            $res["$opt"] = in_array( $opt, $data, true );
        }

        return $res;
    }

    protected function needsLabel() {
        return false;
    }
}