ACF

Let's say we want to implement a new type of field on Advanced Custom Fields.

Below is an implementation of a custom hidden field.

namespace FCG\WP\Plugin\Agenda\ACF\Fields;

use csrui\WPConstruct\Plugin\ContentType\ACF\FieldType;

/**
 * Defines an ACF type of field.
 *
 * @since      0.0.2
 * @package    FCG
 * @subpackage Agenda/lib/ACF/Fields
 * @author     Rui Sardinha <mail@ruisardinha.com>
 */
class WeeklySessions extends FieldType {

    /**
     * ACF Configuration for the field type
     *
     * @since  0.0.2
     * @return array List of parameters for ACF
     */
    protected function get_config() : array {
        return [
            'name'     => 'weekly_sessions',
            'label'    => _x( 'Weekly Sessions', 'Agenda ACF Field Type', 'fcg-agenda' ),
            'category' => 'basic',
            'defaults' => [],
            'l10n'     => [],
            'settings' => [],
        ];
    }

    /**
     * Render the field's HTML
     *
     * @since  0.0.2
     * @param  array $field $field data from ACF
     */
    public function render_field( $field ) {

        printf(
            '<input type="hidden" name="%s" id="%s" value="%s" /><div id="js-weekly-sessions" data-field-id="%s">%s</div>',
            esc_attr( $field['name'] ),
            esc_attr( $field['id'] ),
            esc_attr( $field['value'] ),
            esc_attr( $field['id'] ),
            esc_html_x( 'Loading interface...', 'Agenda ACF Field Type', 'fcg-agenda' )
        );
    }
}