public static function popup_settings( $settings, $popup_id ) {

		if ( is_admin() || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
			return $settings;
		}

		static $form_popup_id;

		/**
		 * Checks for popup form submission.
		 */
		if ( ! isset( $form_popup_id ) ) {
			$form_popup_id = isset( $_REQUEST['pum_form_popup_id'] ) && absint( $_REQUEST['pum_form_popup_id'] ) > 0 ? absint( $_REQUEST['pum_form_popup_id'] ) : false;
		}

		// Should it reopen? Only if all of the following are true.
		$should_reopen = [
			// Form popup was submitted and matches this popup.
			$form_popup_id && $popup_id == $form_popup_id,
			// Form reopen was not marked disable.
			empty( $settings['disable_form_reopen'] ) || ! $settings['disable_form_reopen'],
			// Close on form submission is disbaled, or has a timer larger than 0.
			( empty( $settings['close_on_form_submission'] ) || ! $settings['close_on_form_submission'] || ( $settings['close_on_form_submission'] && $settings['close_on_form_submission_delay'] > 0 ) ),
		];

		/**
		 * If submission exists for this popup remove auto open triggers and add an admin_debug trigger to reshow the popup.
		 */
		if ( ! in_array( false, $should_reopen ) ) {
			$triggers = ! empty( $settings['triggers'] ) ? $settings['triggers'] : array();

			foreach ( $triggers as $key => $trigger ) {
				if ( $trigger['type'] == 'auto_open' ) {
					unset( $triggers[ $key ] );
				}
			}

			$settings['triggers'][] = array(
				'type' => 'admin_debug',
			);
		}

		return $settings;
	}