public function define_action() {

		global $uncanny_automator;

		$action = array(
			'author'             => $uncanny_automator->get_author_name( $this->action_code ),
			'support_link'       => $uncanny_automator->get_author_support_link( $this->action_code, 'knowledge-base/mailchimp/' ),
			'is_pro'             => false,
			'integration'        => self::$integration,
			'code'               => $this->action_code,
			'sentence'           => sprintf( __( 'Add the user to {{an audience:%1$s}}', 'uncanny-automator' ), $this->action_meta ),
			'select_option_name' => __( 'Add the user to {{an audience}}', 'uncanny-automator' ),
			'priority'           => 10,
			'accepted_args'      => 1,
			'execution_function' => array( $this, 'add_update_audience_member' ),
			'options_group'      => array(
				$this->action_meta => array(
					$uncanny_automator->helpers->recipe->mailchimp->options->get_all_lists(
						__( 'Audience', 'uncanny-automator' ),
						'MCLIST',
						array(
							'is_ajax'      => true,
							'target_field' => 'MCLISTGROUPS',
							'endpoint'     => 'select_mcgroupslist_from_mclist',
						)
					),
					$uncanny_automator->helpers->recipe->mailchimp->options->get_double_opt_in(
						__( 'Double opt-in', 'uncanny-automator' ),
						'MCDOUBLEOPTIN',
						array(
							'description' => __( 'When set to "yes", a confirmation email will be sent before the user is added to the selected audience.', 'uncanny-automator' ),
						)
					),
					$uncanny_automator->helpers->recipe->mailchimp->options->get_double_opt_in(
						__( 'Update existing', 'uncanny-automator' ),
						'MCUPDATEEXISTING',
						array(
							'description' => __( 'If this is set to Yes, the information provided will be used to update the existing user. Fields that are left blank will not be updated.', 'uncanny-automator' ),
						)
					),
					$uncanny_automator->helpers->recipe->mailchimp->options->get_double_opt_in(
						__( 'Change groups?', 'uncanny-automator' ),
						'MCCHANGEGROUPS',
						array(
							'options'     => array(
								'replace-all'      => __( 'Replace all', 'uncanny-automator' ),
								'add-only'         => __( 'Add only', 'uncanny-automator' ),
								'replace-matching' => __( 'Replace matching', 'uncanny-automator' ),
							),
							'description' => __( "Add only: The group(s) specified below will be added to the subscriber's existing groups/interests. Replace All: All of the subscriber's existing groups will be cleared, and replaced with the groups selected below. Replace Matching: Clears any existing group selections only for the groups specified below.", 'uncanny-automator' ),
						)
					),
					$uncanny_automator->helpers->recipe->mailchimp->options->get_list_groups(
						__( 'Groups', 'uncanny-automator' ),
						'MCLISTGROUPS',
						array(
							// 'is_ajax'     => TRUE,
							'required' => false,
						)
					),
					$uncanny_automator->helpers->recipe->field->text_field( 'MCLANGUAGECODE', __( 'Language code', 'uncanny-automator' ), true, 'text', null, false ),
					array(
						'option_code'       => 'MERGE_FIELDS',
						'input_type'        => 'repeater',
						'label'             => __( 'Merge fields', 'uncanny-automator' ),
						/* translators: 1. Button */
						'description'       => __( '', 'uncanny-automator' ),
						'required'          => true,
						'fields'            => array(
							array(
								'option_code' => 'FIELD_NAME',
								'label'       => __( 'Field', 'uncanny-automator' ),
								'input_type'  => 'text',
								'required'    => true,
								'read_only'   => true,
								'options'     => array(),
							),
							$uncanny_automator->helpers->recipe->field->text_field( 'FIELD_VALUE', __( 'Value', 'uncanny-automator' ), true, 'text', '', false ),
						),
						'add_row_button'    => __( 'Add pair', 'uncanny-automator' ),
						'remove_row_button' => __( 'Remove pair', 'uncanny-automator' ),
						'hide_actions'      => true,
					),
				),
			),
			'buttons'            => array(
				array(
					'show_in'     => $this->action_meta,
					'text'        => __( 'Load fields', 'uncanny-automator' ),
					'css_classes' => 'uap-btn uap-btn--red',
					'on_click'    => $this->get_samples_js(),
					'modules'     => array( 'modal', 'markdown' ),
				),
			),
		);

		$uncanny_automator->register->action( $action );
	}