File widgets/widget.php

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<?php

namespace SIW\Widgets;

/**
 * SIW Widget base class
 *
 * @copyright 2019 SIW Internationale Vrijwilligersprojecten
 * @since     3.0.0
 */
abstract class Widget extends \SiteOrigin_Widget {

    /**
     * ID van widget
     *
     * @var string
     */
    protected $widget_id;

    /**
     * Naam van widget
     *
     * @var string
     */
    protected $widget_name;

    /**
     * Beschrijving van widget
     *
     * @var string
     */
    protected $widget_description = '';

    /**
     * Icon-class van widget voor pagebuilder
     *
     * @var string
     */
    protected $widget_dashicon ='admin-generic';

    /**
     * Control opties van widget
     *
     * @var array
     */
    protected $widget_control_options = [];

    /**
     * Formuliervelden van widget
     *
     * @var array
     */
    protected $widget_fields = [];

    /**
     * Constructor
     */
    public function __construct() {

        $this->set_widget_properties();

        parent::__construct(
            "siw_{$this->widget_id}_widget",
            "SIW: {$this->widget_name}",
            [
                'description'   => $this->widget_description,
                'panels_groups' => [ 'siw' ],
                'panels_icon'   => sprintf( 'dashicons dashicons-%s', $this->widget_dashicon ),
                'has_preview'   => false,
            ],
            $this->widget_control_options,
            $this->widget_fields,
            plugin_dir_path( __FILE__ )
        );
    }

    /**
     * Zet eigenschappen van widget
     * 
     * - Naam
     * - Beschrijving
     */
    abstract protected function set_widget_properties();

    /**
     * Genereert specifieke inhoud van widget
     *
     * @param array $instance
     * @param array $args
     * @param array $template_vars
     * @param string $css_name
     * @return string
     */
    abstract protected function get_content( array $instance, array $args, array $template_vars, string $css_name );

    /**
     * Genereert generieke inhoud van widget
     *
     * @param array $instance
     * @param array $args
     * @param array $template_vars
     * @param string $css_name
     * @return string
     */
    protected function get_html_content( array $instance, array $args, array $template_vars, string $css_name ) { 
        $title = $instance['title'] ?? '';
        $title = apply_filters( 'widget_title', $title );
        
        ob_start();

        echo $args['before_widget'];
        if ( $title ) {
            echo $args['before_title'] . $title . $args['after_title'];
        }?>
        <div>
            <?= $this->get_content( $instance, $args, $template_vars, $css_name ); ?>
        </div>
        <?php echo $args['after_widget'];
        $html_content = ob_get_clean();
        return $html_content;
    }
}

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