admin/settings/classes/customize-options.class.php
<?php if ( ! defined( 'ABSPATH' ) ) { die; } // Cannot access directly.
/**
 *
 * Customize Options Class
 *
 * @since 1.0.0
 * @version 1.0.0
 *
 */
if ( ! class_exists( 'ULF_Customize_Options' ) ) {
  class ULF_Customize_Options extends ULF_Abstract {

    // constans
    public $unique       = '';
    public $abstract     = 'customize';
    public $options      = array();
    public $sections     = array();
    public $pre_fields   = array();
    public $pre_sections = array();
    public $priority     = 10;
    public $args         = array(
      'database'         => 'option',
      'transport'        => 'refresh',
      'capability'       => 'manage_options',
      'save_defaults'    => true,
      'enqueue_webfont'  => true,
      'async_webfont'    => false,
      'output_css'       => true,
      'defaults'         => array()
    );

    // run customize construct
    public function __construct( $key, $params ) {

      $this->unique       = $key;
      $this->args         = apply_filters( "ulf_{$this->unique}_args", wp_parse_args( $params['args'], $this->args ), $this );
      $this->sections     = apply_filters( "ulf_{$this->unique}_sections", $params['sections'], $this );
      $this->pre_fields   = $this->pre_fields( $this->sections );
      $this->pre_sections = $this->pre_sections_customize( $this->sections );

      $this->get_options();
      $this->save_defaults();

      add_action( 'customize_register', array( $this, 'add_customize_options' ) );
      add_action( 'customize_save_after', array( $this, 'add_customize_save_after' ) );

      // Get options for enqueue actions
      if ( is_customize_preview() ) {
        add_action( 'wp_enqueue_scripts', array( $this, 'get_options' ) );
      }

      // wp enqeueu for typography and output css
      parent::__construct();

    }

    // instance
    public static function instance( $key, $params = array() ) {
      return new self( $key, $params );
    }

    public function add_customize_save_after( $wp_customize ) {
      do_action( "ulf_{$this->unique}_save_before", $this->get_options(), $this, $wp_customize );
      do_action( "ulf_{$this->unique}_saved", $this->get_options(), $this, $wp_customize );
      do_action( "ulf_{$this->unique}_save_after", $this->get_options(), $this, $wp_customize );
    }

    // get default value
    public function get_default( $field ) {

      $default = ( isset( $field['default'] ) ) ? $field['default'] : '';
      $default = ( isset( $this->args['defaults'][$field['id']] ) ) ? $this->args['defaults'][$field['id']] : $default;

      return $default;

    }

    // get option
    public function get_options() {

      if ( $this->args['database'] === 'theme_mod' ) {
        $this->options = get_theme_mod( $this->unique, array() );
      } else {
        $this->options = get_option( $this->unique, array() );
      }

      if ( empty( $this->options ) ) {
        $this->options = array();
      }

      return $this->options;

    }

    // save defaults and set new fields value to main options
    public function save_defaults() {

      $tmp_options = $this->options;

      if ( ! empty( $this->pre_fields ) ) {
        foreach ( $this->pre_fields as $field ) {
          if ( ! empty( $field['id'] ) ) {
            $this->options[$field['id']] = ( isset( $this->options[$field['id']] ) ) ? $this->options[$field['id']] : $this->get_default( $field );
          }
        }
      }

      if ( $this->args['save_defaults'] && empty( $this->args['show_in_customizer'] ) && empty( $tmp_options ) ) {

        if ( $this->args['database'] === 'theme_mod' ) {
          set_theme_mod( $this->unique, $this->options );
        } else {
          update_option( $this->unique, $this->options );
        }

      }

    }

    public function pre_sections_customize( $sections ) {

      $result  = array();
      $parents = array();

      foreach ( $sections as $key => $section ) {
        if ( ! empty( $section['parent'] ) ) {
          $parents[$section['parent']][] = $section;
          unset( $sections[$key] );
        }
      }

      foreach ( $sections as $key => $section ) {
        if ( ! empty( $section['id'] ) && ! empty( $parents[$section['id']] ) ) {
          $section['subs'] = $parents[$section['id']];
        }
        $result[] = $section;
      }

      return $result;

    }

    public function add_customize_options( $wp_customize ) {

      if ( ! class_exists( 'WP_Customize_Panel_ULF' ) ) {
        ULF::include_plugin_file( 'functions/customize.php'  );
      }

      foreach ( $this->pre_sections as $section ) {

        if ( ! empty( $section['subs'] ) ) {

          $panel_id = ( isset( $section['id'] ) ) ? $section['id'] : $this->unique .'-panel-'. $this->priority;

          $wp_customize->add_panel( new WP_Customize_Panel_ULF( $wp_customize, $panel_id, array(
            'title'       => ( isset( $section['title'] ) ) ? $section['title'] : null,
            'description' => ( isset( $section['description'] ) ) ? $section['description'] : null,
            'priority'    => ( isset( $section['priority'] ) ) ? $section['priority'] : null,
          ) ) );

          $this->priority++;

          foreach ( $section['subs'] as $sub_section ) {

            $section_id = ( isset( $sub_section['id'] ) ) ? $sub_section['id'] : $this->unique .'-section-'. $this->priority;

            $this->add_section( $wp_customize, $section_id, $sub_section, $panel_id );

            $this->priority++;

          }

        } else {

          $section_id = ( isset( $section['id'] ) ) ? $section['id'] : $this->unique .'-section-'. $this->priority;

          $this->add_section( $wp_customize, $section_id, $section, false );

          $this->priority++;

        }

      }

    }

    // add customize section
    public function add_section( $wp_customize, $section_id, $section_args, $panel_id ) {

      if ( ! empty( $section_args['assign'] ) ) {

        $section_id = $section_args['assign'];

      } else {

        $wp_customize->add_section( new WP_Customize_Section_ULF( $wp_customize, $section_id, array(
          'title'       => ( isset( $section_args['title'] ) ) ? $section_args['title'] : '',
          'description' => ( isset( $section_args['description'] ) ) ? $section_args['description'] : '',
          'priority'    => ( isset( $section_args['priority'] ) ) ? $section_args['priority'] : '',
          'panel'       => ( $panel_id ) ? $panel_id : '',
        ) ) );

      }

      if ( ! empty( $section_args['fields'] ) ) {

        $field_key = 1;

        foreach ( $section_args['fields'] as $field ) {

          if ( isset( $field['id'] ) ) {
            $field['default'] = $this->get_default( $field );
          }

          $field_id        = ( isset( $field['id'] ) ) ? $field['id'] : '_nonce-'. $section_id .'-'. $field_key;
          $setting_args    = ( isset( $field['setting_args'] ) ) ? $field['setting_args'] : array();
          $control_args    = ( isset( $field['control_args'] ) ) ? $field['control_args'] : array();
          $field_transport = ( isset( $field['transport'] ) ) ? $field['transport'] : $this->args['transport'];
          $field_sanitize  = ( isset( $field['sanitize'] ) ) ? $field['sanitize'] : '';
          $field_validate  = ( isset( $field['validate'] ) ) ? $field['validate'] : '';
          $field_default   = ( isset( $field['default'] ) ) ? $field['default'] : '';
          $field_customize = ( ( isset( $field['selectors'] ) || isset( $field['selector'] ) ) && ! isset( $field['transport'] ) ) ? true : false;
          $has_selective   = ( isset( $field['selective_refresh'] ) && isset( $wp_customize->selective_refresh ) ) ? true : false;

          $setting_id = $this->unique .'['. $field_id .']';
          $transport  = ( $has_selective || $field_customize ) ? 'postMessage' : $field_transport;

          $wp_customize->add_setting( $setting_id,
            wp_parse_args( $setting_args, array(
              'default'           => $field_default,
              'type'              => $this->args['database'],
              'capability'        => $this->args['capability'],
              'transport'         => $transport,
              'sanitize_callback' => $field_sanitize,
              'validate_callback' => $field_validate
            ) )
          );

          $wp_customize->add_control( new WP_Customize_Control_ULF( $wp_customize, $setting_id,
            wp_parse_args( $control_args, array(
              'unique'   => $this->unique,
              'field'    => $field,
              'section'  => $section_id,
              'settings' => $setting_id
            ) )
          ) );

          if ( $has_selective ) {
            $wp_customize->selective_refresh->add_partial( $setting_id, $field['selective_refresh'] );
          }

          $field_key++;
        }

      }


    }

  }
}
