Sindbad~EG File Manager

<?php

namespace QuadLayers\WOOCCM\Controller;

/**
 * Advanced Class
 */
class Advanced {

	protected static $_instance;

	public function __construct() {
		add_action( 'wooccm_sections_header', array( $this, 'add_header' ) );
		add_action( 'woocommerce_sections_' . WOOCCM_PREFIX, array( $this, 'add_section' ) );
		add_action( 'woocommerce_settings_save_' . WOOCCM_PREFIX, array( $this, 'save_settings' ) );

		// Frontend
		// -------------------------------------------------------------------------
		add_action( 'woocommerce_before_checkout_form', array( $this, 'add_inline_scripts' ) );

		// Compatibility
		// -------------------------------------------------------------------------
		add_filter( 'default_option_wooccm_advanced_custom_css', array( $this, 'custom_css_w' ) );
	}

	public static function instance() {
		if ( is_null( self::$_instance ) ) {
			self::$_instance = new self();
		}
		return self::$_instance;
	}

	public function add_inline_scripts() {
		$css = get_option( 'wooccm_advanced_custom_css', false );
		if ( $css ) {
			?>
		<style>
			<?php echo esc_html( $css ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
		</style>
			<?php
		}
	}

	public function get_settings() {
		return array(
			array(
				'type' => 'title',
				'id'   => 'section_title',
			),
			// array(
			// 'name' => esc_html__('Allow custom field names', 'woocommerce-checkout-manager'),
			// 'desc_tip' => esc_html__('Show the selected fields in the thankyou page.', 'woocommerce-checkout-manager'),
			// 'id' => 'wooccm_allow_custom_field_names',
			// 'type' => 'select',
			// 'class' => 'chosen_select',
			// 'options' => array(
			// 'yes' => esc_html__('Yes', 'woocommerce-checkout-manager'),
			// 'no' => esc_html__('No', 'woocommerce-checkout-manager'),
			// ),
			// 'default' => 'no',
			// ),
			array(
				'name'     => esc_html__( 'Export custom fields', 'woocommerce-checkout-manager' ),
				'desc_tip' => esc_html__( 'Include custom fields in CSV export files generated by WooCommerce Customer / Order / Coupon Export.', 'woocommerce-checkout-manager' ),
				'id'       => 'wooccm_export_custom_fields',
				'type'     => 'select',
				'class'    => 'chosen_select wooccm-premium-field',
				'desc'     => esc_html__( 'This is a premium feature.', 'woocommerce-checkout-manager' ),
				'options'  => array(
					'yes' => esc_html__( 'Yes', 'woocommerce-checkout-manager' ),
					'no'  => esc_html__( 'No', 'woocommerce-checkout-manager' ),
				),
				'default'  => 'yes',
			),
			array(
				'name'        => esc_html__( 'Custom CSS', 'woocommerce-checkout-manager' ),
				'desc_tip'    => esc_html__( 'Add custom stylesheets to the checkout page.', 'woocommerce-checkout-manager' ),
				'id'          => 'wooccm_advanced_custom_css',
				'type'        => 'textarea',
				'placeholder' => '',
			),
			array(
				'type' => 'sectionend',
				'id'   => 'section_end',
			),
		);
	}

	// Admin
	// -------------------------------------------------------------------------

	public function add_header() {
		global $current_section;
		?>
	<li><a href="<?php echo esc_url( admin_url( 'admin.php?page=wc-settings&tab=wooccm&section=advanced' ) ); ?>" class="<?php echo ( 'advanced' == $current_section ? 'current' : '' ); ?>"><?php esc_html_e( 'Advanced', 'woocommerce-checkout-manager' ); ?></a> | </li>
		<?php
	}

	public function add_section() {
		global $current_section;

		if ( 'advanced' == $current_section ) {

			$settings = $this->get_settings();

			include_once WOOCCM_PLUGIN_DIR . 'lib/view/backend/pages/advanced.php';
		}
	}

	public function save_settings() {
		global $current_section;

		if ( 'advanced' == $current_section ) {
			woocommerce_update_options( $this->get_settings() );
		}
	}

	public function custom_css_w( $value ) {
		$options = get_option( 'wccs_settings' );

		$css = isset( $options['checkness']['custom_css_w'] ) ? $options['checkness']['custom_css_w'] : false;

		if ( $css ) {
			return $css;
		}

		return $value;
	}
}