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

    // constans
    public $unique      = '';
    public $taxonomy    = '';
    public $abstract    = 'taxonomy';
    public $sections    = array();
    public $pre_fields  = array();
    public $taxonomies  = array();
    public $args        = array(
      'taxonomy'        => 'category',
      'data_type'       => 'serialize',
      'class'           => '',
      'enqueue_webfont' => true,
      'async_webfont'   => false,
      'output_css'      => true,
      'defaults'        => array(),
    );

    // run taxonomy 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->taxonomies = ( is_array( $this->args['taxonomy'] ) ) ? $this->args['taxonomy'] : array_filter( (array) $this->args['taxonomy'] );
      $this->taxonomy   = ( ! empty( $_REQUEST[ 'taxonomy' ] ) ) ? sanitize_text_field( wp_unslash( $_REQUEST[ 'taxonomy' ] ) ) : '';
      $this->pre_fields = $this->pre_fields( $this->sections );

      if ( ! empty( $this->taxonomies ) && in_array( $this->taxonomy, $this->taxonomies ) ) {
        add_action( 'admin_init', array( $this, 'add_taxonomy_options' ) );
      }

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

    }

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

    // add taxonomy add/edit fields
    public function add_taxonomy_options() {

      add_action( $this->taxonomy .'_add_form_fields', array( $this, 'render_taxonomy_form_fields' ) );
      add_action( $this->taxonomy .'_edit_form', array( $this, 'render_taxonomy_form_fields' ) );

      add_action( 'created_'. $this->taxonomy, array( $this, 'save_taxonomy' ) );
      add_action( 'edited_'. $this->taxonomy, array( $this, 'save_taxonomy' ) );

    }

    // 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 meta value
    public function get_meta_value( $field, $term_id = null ) {

      $value = null;

      $term_id = ( ! isset( $term_id ) ) ? get_queried_object_id() : $term_id;

      if ( ! empty( $term_id ) && ! empty( $field['id'] ) ) {

        if ( $this->args['data_type'] !== 'serialize' ) {
          $meta  = get_term_meta( $term_id, $field['id'] );
          $value = ( isset( $meta[0] ) ) ? $meta[0] : null;
        } else {
          $meta  = get_term_meta( $term_id, $this->unique, true );
          $value = ( isset( $meta[$field['id']] ) ) ? $meta[$field['id']] : null;
        }

      }

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

      return $value;

    }

    // render taxonomy add/edit form fields
    public function render_taxonomy_form_fields( $term ) {

      $is_term   = ( is_object( $term ) && isset( $term->taxonomy ) ) ? true : false;
      $term_id   = ( $is_term ) ? $term->term_id : 0;
      $taxonomy  = ( $is_term ) ? $term->taxonomy : $term;
      $classname = ( $is_term ) ? 'edit' : 'add';
      $errors    = ( ! empty( $term_id ) ) ? get_term_meta( $term_id, '_ulf_errors_'. $this->unique, true ) : array();
      $errors    = ( ! empty( $errors ) ) ? $errors : array();
      $class     = ( $this->args['class'] ) ? ' '. $this->args['class'] : '';

      if ( ! empty( $errors ) ) {
        delete_term_meta( $term_id, '_ulf_errors_'. $this->unique );
      }

      wp_nonce_field( 'ulf_taxonomy_nonce', 'ulf_taxonomy_nonce'. $this->unique );

      echo '<div class="ulf ulf-taxonomy ulf-show-all ulf-onload ulf-taxonomy-'. esc_attr( $classname ) .'-fields '. esc_attr( $class ) .'">';

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

        if ( $taxonomy === $this->taxonomy ) {

          $section_icon  = ( ! empty( $section['icon'] ) ) ? '<i class="ulf-section-icon '. esc_attr( $section['icon'] ) .'"></i>' : '';
          $section_title = ( ! empty( $section['title'] ) ) ? $section['title'] : '';

          echo ( $section_title || $section_icon ) ? '<div class="ulf-section-title"><h3>'. $section_icon . $section_title .'</h3></div>' : '';
          echo ( ! empty( $section['description'] ) ) ? '<div class="ulf-field ulf-section-description">'. $section['description'] .'</div>' : '';

          if ( ! empty( $section['fields'] ) ) {
            foreach ( $section['fields'] as $field ) {

              if ( ! empty( $field['id'] ) && ! empty( $errors['fields'][$field['id']] ) ) {
                $field['_error'] = $errors['fields'][$field['id']];
              }

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

              ULF::field( $field, $this->get_meta_value( $field, $term_id ), $this->unique, 'taxonomy' );

            }
          }
        }

      }

      echo '</div>';

    }

    // save taxonomy form fields
    public function save_taxonomy( $term_id ) {

      $count    = 1;
      $data     = array();
      $errors   = array();
      $noncekey = 'ulf_taxonomy_nonce'. $this->unique;
      $nonce    = ( ! empty( $_POST[ $noncekey ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ $noncekey ] ) ) : '';
      $taxonomy = ( ! empty( $_POST[ 'taxonomy' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'taxonomy' ] ) ) : '';

      if ( ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) || ! wp_verify_nonce( $nonce, 'ulf_taxonomy_nonce' ) ) {
        return $term_id;
      }

      // XSS ok.
      // No worries, This "POST" requests is sanitizing in the below foreach.
      $request = ( ! empty( $_POST[ $this->unique ] ) ) ? $_POST[ $this->unique ] : array();

      if ( ! empty( $request ) ) {

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

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

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

              if ( ! empty( $field['id'] ) ) {

                $field_id    = $field['id'];
                $field_value = isset( $request[$field_id] ) ? $request[$field_id] : '';

                // Sanitize "post" request of field.
                if ( ! isset( $field['sanitize'] ) ) {

                  if( is_array( $field_value ) ) {
                    $data[$field_id] = wp_kses_post_deep( $field_value );
                  } else {
                    $data[$field_id] = wp_kses_post( $field_value );
                  }

                } else if( isset( $field['sanitize'] ) && is_callable( $field['sanitize'] ) ) {

                  $data[$field_id] = call_user_func( $field['sanitize'], $field_value );

                } else {

                  $data[$field_id] = $field_value;

                }

                // Validate "post" request of field.
                if ( isset( $field['validate'] ) && is_callable( $field['validate'] ) ) {

                  $has_validated = call_user_func( $field['validate'], $field_value );

                  if ( ! empty( $has_validated ) ) {

                    $errors['sections'][$count] = true;
                    $errors['fields'][$field_id] = $has_validated;
                    $data[$field_id] = $this->get_meta_value( $field, $term_id );

                  }

                }

              }

            }

          }

          $count++;

        }

      }

      $data = apply_filters( "ulf_{$this->unique}_save", $data, $term_id, $this );

      do_action( "ulf_{$this->unique}_save_before", $data, $term_id, $this );

      if ( empty( $data ) ) {

        if ( $this->args['data_type'] !== 'serialize' ) {
          foreach ( $this->pre_fields as $field ) {
            if ( ! empty( $field['id'] ) ) {
              delete_term_meta( $term_id, $field['id'] );
            }
          }
        } else {
          delete_term_meta( $term_id, $this->unique );
        }

      } else {

        if ( $this->args['data_type'] !== 'serialize' ) {
          foreach ( $data as $key => $value ) {
            update_term_meta( $term_id, $key, $value );
          }
        } else {
          update_term_meta( $term_id, $this->unique, $data );
        }

        if ( ! empty( $errors ) ) {
          update_term_meta( $term_id, '_ulf_errors_'. $this->unique, $errors );
        }

      }

      do_action( "ulf_{$this->unique}_saved", $data, $term_id, $this );

      do_action( "ulf_{$this->unique}_save_after", $data, $term_id, $this );

    }
  }
}
