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    <h3>Editing: SliderSetting.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

namespace CarouselSlider\Abstracts;

use BadMethodCallException;
use CarouselSlider\Admin\MetaBoxConfig;
use CarouselSlider\Helper;
use CarouselSlider\Interfaces\SliderSettingInterface;
use CarouselSlider\Supports\Sanitize;
use CarouselSlider\Supports\Validate;

/**
 * SliderSetting class
 * The base slider setting for any slider type
 *
 * @method string get_nav_steps()
 * @method int get_stage_padding()
 * @method int get_space_between()
 * @method bool is_loop()
 * @method bool is_lazy_load()
 * @method bool is_auto_width()
 * @method bool is_autoplay()
 * @method bool has_autoplay_hover_pause()
 * @method int get_autoplay_delay()
 * @method int get_autoplay_speed()
 * @method int get_items_on_mobile()
 * @method int get_items_on_small_tablet()
 * @method int get_items_on_tablet()
 * @method int get_items_on_desktop()
 * @method int get_items_on_widescreen()
 * @method int get_items_on_fullhd()
 *
 * @package CarouselSlider/Abstracts
 */
class SliderSetting extends Data implements SliderSettingInterface {

	const NAV_VISIBILITY        = array( 'always', 'never', 'hover' );
	const NAV_POSITION          = array( 'inside', 'outside' );
	const PAGINATION_VISIBILITY = array( 'always', 'never', 'hover' );
	const PAGINATION_TYPE       = array( 'bullets', 'fraction', 'progressbar', 'custom' );
	const SLIDE_EFFECTS         = array( 'slide', 'fade', 'cube', 'coverflow', 'flip', 'creative', 'cards' );

	/**
	 * The slider id.
	 *
	 * @var int
	 */
	protected $slider_id = 0;

	/**
	 * Get slider type
	 *
	 * @var string
	 */
	protected $slider_type = null;

	/**
	 * Is data read from server?
	 *
	 * @var bool
	 */
	protected $data_read = false;

	/**
	 * Global settings
	 *
	 * @var array
	 */
	protected static $global_settings = array();

	/**
	 * Class constructor
	 *
	 * @param  int  $slider_id  The slider id.
	 * @param  bool $read_metadata  Should read metadata immediately.
	 */
	public function __construct( int $slider_id, bool $read_metadata = true ) {
		$this-&gt;slider_id = $slider_id;
		if ( $read_metadata ) {
			$this-&gt;read_metadata();
			if ( method_exists( $this, 'read_extra_metadata' ) ) {
				$this-&gt;read_extra_metadata();
			}
		}
	}

	/**
	 * Get global settings
	 *
	 * @return array
	 */
	public static function get_global_settings(): array {
		return Helper::get_global_settings();
	}

	/**
	 * Does this collection have a given key?
	 *
	 * @param  string $key  The data key.
	 *
	 * @return bool
	 */
	public static function has_global_option( string $key ): bool {
		return array_key_exists( $key, self::get_global_settings() );
	}

	/**
	 * Get option
	 *
	 * @param  string $key  option key.
	 * @param  mixed  $default_value  default value.
	 *
	 * @return mixed
	 */
	public function get_global_option( string $key, $default_value = '' ) {
		if ( static::has_global_option( $key ) ) {
			return static::get_global_settings()[ $key ];
		}

		return $default_value;
	}

	/**
	 * Get option for key
	 * If there is no option for key, return from global option.
	 *
	 * @param  string $key  option key.
	 * @param  mixed  $default_value  default value to return if data key does not exist.
	 *
	 * @return mixed The key's value, or the default value
	 */
	public function get_option( string $key, $default_value = '' ) {
		if ( $this-&gt;has_prop( $key ) ) {
			return $this-&gt;get_prop( $key, $default_value );
		}

		return $this-&gt;get_global_option( $key, $default_value );
	}

	/**
	 * Get slider Id
	 *
	 * @return int
	 */
	public function get_slider_id(): int {
		return $this-&gt;slider_id;
	}

	/**
	 * Get slider type
	 *
	 * @return string
	 */
	public function get_slider_type(): string {
		if ( is_null( $this-&gt;slider_type ) ) {
			$slide_type = get_post_meta( $this-&gt;get_slider_id(), '_slide_type', true );
			$this-&gt;set_slider_type( $slide_type );
		}

		return $this-&gt;slider_type;
	}

	/**
	 * Set slider type
	 *
	 * @param  mixed $type  The slider type.
	 *
	 * @return void
	 */
	public function set_slider_type( $type ) {
		if ( array_key_exists( $type, Helper::get_slide_types() ) ) {
			$this-&gt;slider_type = $type;
		} else {
			$this-&gt;slider_type = 'image-carousel';
		}
	}

	/**
	 * Get image size
	 *
	 * @return string
	 */
	public function get_image_size(): string {
		$size = $this-&gt;get_option( 'image_size', 'medium_large' );

		return array_key_exists( $size, Helper::get_available_image_sizes() ) ? $size : 'medium_large';
	}

	/**
	 * If it should lazy load image
	 *
	 * @return bool
	 */
	public function lazy_load_image(): bool {
		$default = Helper::get_default_setting( 'lazy_load_image' );

		return Validate::checked( $this-&gt;get_option( 'lazy_load', $default ) );
	}

	/**
	 * Set nav visibility
	 *
	 * @param  mixed $value  The navigation visibility.
	 */
	public function set_nav_visibility( $value ) {
		// For backup compatability.
		$value = str_replace( array( 'off', 'on' ), array( 'never', 'hover' ), $value );

		if ( in_array( $value, static::NAV_VISIBILITY, true ) ) {
			$this-&gt;data['nav_visibility'] = $value;
		}
	}


	/**
	 * Get nav visibility
	 *
	 * @return string
	 */
	public function get_nav_visibility(): string {
		$value = $this-&gt;get_prop( 'nav_visibility' );
		// For backup compatability.
		$value = str_replace( array( 'off', 'on' ), array( 'never', 'hover' ), $value );

		return $value;
	}

	/**
	 * Set nav position
	 *
	 * @param  mixed $value  The navigation position.
	 */
	public function set_nav_position( $value ) {
		if ( in_array( $value, static::NAV_POSITION, true ) ) {
			$this-&gt;data['nav_position'] = $value;
		}
	}

	/**
	 * Set nav steps
	 *
	 * @param  mixed $value  The navigation steps.
	 */
	public function set_nav_steps( $value ) {
		if ( in_array( $value, array( 'page', '-1', - 1 ), true ) ) {
			$this-&gt;data['nav_steps'] = 'page';
		} else {
			$this-&gt;data['nav_steps'] = max( 1, intval( $value ) );
		}
	}

	/**
	 * Set pagination visibility
	 *
	 * @param  mixed $value  The pagination visibility value.
	 */
	public function set_pagination_visibility( $value ) {
		// For backup compatability.
		$value = str_replace( array( 'off', 'on' ), array( 'never', 'always' ), $value );

		if ( in_array( $value, static::PAGINATION_VISIBILITY, true ) ) {
			$this-&gt;data['pagination_visibility'] = $value;
		}
	}

	/**
	 * Get pagination visibility
	 *
	 * @return string
	 */
	public function get_pagination_visibility(): string {
		$value = $this-&gt;get_prop( 'pagination_visibility' );
		// For backup compatability.
		$value = str_replace( array( 'off', 'on' ), array( 'never', 'always' ), $value );

		return $value;
	}

	/**
	 * Get pagination type. Only works with Pro.
	 *
	 * @return string
	 */
	public function get_pagination_type(): string {
		$value = $this-&gt;get_prop( 'pagination_type', 'bullets' );

		return in_array( $value, static::PAGINATION_TYPE, true ) ? $value : 'bullets';
	}

	/**
	 * Get slider direction. Only works with pro.
	 *
	 * @return string
	 */
	public function get_slider_direction(): string {
		return 'vertical' === $this-&gt;get_option( 'slider_direction' ) ? 'vertical' : 'horizontal';
	}

	/**
	 * Get slider direction. Only works with pro.
	 *
	 * @return string
	 */
	public function get_slider_effect(): string {
		if ( ! Helper::is_pro_active() ) {
			return 'slide';
		}
		$effect = $this-&gt;get_option( 'slider_effect' );

		return in_array( $effect, static::SLIDE_EFFECTS, true ) ? $effect : 'slide';
	}

	/**
	 * Get sliders per view
	 *
	 * @return array
	 */
	public function get_slides_per_view(): array {
		// For backup compatability.
		if ( ! $this-&gt;has_prop( 'slides_per_view' ) ) {
			return array(
				'xs'  =&gt; (int) $this-&gt;get_items_on_mobile(),
				'sm'  =&gt; (int) $this-&gt;get_items_on_small_tablet(),
				'md'  =&gt; (int) $this-&gt;get_items_on_tablet(),
				'lg'  =&gt; (int) $this-&gt;get_items_on_desktop(),
				'xl'  =&gt; (int) $this-&gt;get_items_on_widescreen(),
				'2xl' =&gt; (int) $this-&gt;get_items_on_fullhd(),
			);
		}
		$slides          = (array) $this-&gt;get_option( 'slides_per_view', array() );
		$slides          = wp_parse_args( $slides, array( 'xs' =&gt; 1 ) );
		$slides_per_view = array();
		foreach ( $slides as $prefix =&gt; $item ) {
			$slides_per_view[ esc_attr( $prefix ) ] = floatval( $item );
		}

		return $slides_per_view;
	}

	/**
	 * Is it a type of slider?
	 *
	 * @return bool
	 */
	public function is_slider(): bool {
		return 'slider' === $this-&gt;get_prop( 'type_of_slider' );
	}

	/**
	 * Check if we are using swiper
	 *
	 * @return bool
	 */
	public function is_using_swiper(): bool {
		return Helper::is_using_swiper();
	}

	/**
	 * Read setting from database
	 *
	 * @param  array $values  The value to be read.
	 *
	 * @return void
	 */
	public function read_metadata( array $values = array() ) {
		if ( $this-&gt;data_read ) {
			return;
		}
		if ( empty( $values ) ) {
			$metadata = get_post_meta( $this-&gt;get_slider_id() );
			foreach ( $metadata as $meta_key =&gt; $meta_value ) {
				$values[ $meta_key ] = maybe_unserialize( $meta_value[0] );
			}
		}
		$fields_settings = self::get_fields_settings();
		foreach ( $fields_settings as $attribute =&gt; $config ) {
			$this-&gt;read_single_metadata( $attribute, $config, $values );
		}
		$this-&gt;data_read = true;
	}

	/**
	 * Read data from HTTP POST variable
	 *
	 * @param  array $values  The values from HTTP POST variables.
	 *
	 * @return void
	 */
	public function read_http_post_variables( array $values = array() ) {
		$fields_settings = self::get_fields_settings();
		foreach ( $fields_settings as $attribute =&gt; $config ) {
			$this-&gt;read_single_metadata( $attribute, $config, $values );
		}
	}

	/**
	 * Read data from HTTP POST variable
	 *
	 * @param  array $values  The values from HTTP POST variables.
	 *
	 * @return void
	 */
	public function read_extra_http_post_variables( array $values = array() ) {
		if ( method_exists( get_called_class(), 'extra_props' ) ) {
			foreach ( static::extra_props() as $attribute =&gt; $config ) {
				$this-&gt;read_single_metadata( $attribute, $config, $values );
			}
		}
	}

	/**
	 * Read single metadata
	 *
	 * @param  string $attribute  property name.
	 * @param  array  $field  The field settings.
	 * @param  array  $values  The values.
	 *
	 * @return void
	 */
	public function read_single_metadata( string $attribute, array $field, array $values ) {
		$method_name = 'set_' . $attribute;
		$value       = $values[ $field['id'] ] ?? ( $field['default'] ?? null );
		if ( method_exists( $this, $method_name ) ) {
			$this-&gt;$method_name( $value );
		} else {
			$value = $this-&gt;prepare_item_for_response( $field['type'], $value );
			$this-&gt;set_prop( $attribute, $value );
		}
	}

	/**
	 * Write metadata
	 * make sure to backward compatibility for the following props
	 * --- nav_visibility, pagination_visibility, nav_steps
	 * --- Convert boolean value to 'on' and 'off'
	 *
	 * @return void
	 */
	public function write_metadata() {
		$fields_settings = self::get_fields_settings();
		foreach ( $fields_settings as $prop_name =&gt; $field ) {
			$value = $this-&gt;get_prop( $prop_name );
			if ( 'nav_visibility' === $prop_name ) {
				$value = str_replace( array( 'never', 'hover' ), array( 'off', 'on' ), $value );
			}
			if ( 'pagination_visibility' === $prop_name ) {
				$value = str_replace( array( 'never', 'always' ), array( 'off', 'on' ), $value );
			}
			$sanitized_value = $this-&gt;prepare_item_for_database( $value, $field );
			update_post_meta( $this-&gt;slider_id, $field['id'], $sanitized_value );
		}
	}

	/**
	 * Sanitize value by data type
	 *
	 * @param  string $type  The type.
	 * @param  mixed  $value  The value.
	 *
	 * @return mixed
	 */
	protected function prepare_item_for_response( string $type, $value ) {
		if ( 'array' === $type &amp;&amp; is_string( $value ) ) {
			$value = explode( ',', $value );
		}
		if ( 'int[]' === $type &amp;&amp; is_string( $value ) ) {
			$value = array_filter( array_map( 'intval', explode( ',', $value ) ) );
		}
		if ( in_array( $type, array( 'int', 'number' ), true ) ) {
			$value = (int) $value;
		}
		if ( in_array( $type, array( 'bool', 'switch' ), true ) ) {
			$value = Validate::checked( $value );
		}

		return $value;
	}

	/**
	 * Prepare item for database store
	 *
	 * @param  mixed $value  The value to be sanitized.
	 * @param  array $setting  The field setting.
	 *
	 * @return mixed
	 */
	protected function prepare_item_for_database( $value, array $setting ) {
		if ( isset( $setting['sanitize_callback'] ) &amp;&amp; is_callable( $setting['sanitize_callback'] ) ) {
			return call_user_func( $setting['sanitize_callback'], $value );
		}
		if ( isset( $setting['choices'] ) &amp;&amp; is_array( $setting['choices'] ) ) {
			return $this-&gt;sanitize_choices( $value, $setting );
		}
		if ( in_array( $setting['type'], array( 'bool', 'switch' ), true ) ) {
			return Validate::checked( $value ) ? 'on' : 'off';
		}

		return Sanitize::deep( $value );
	}

	/**
	 * Sanitize choices value
	 *
	 * @param  mixed $value  The value to be sanitized.
	 * @param  array $setting  The field setting.
	 *
	 * @return array|mixed|null
	 */
	public function sanitize_choices( $value, array $setting ) {
		$enum = array();
		foreach ( $setting['choices'] as $key =&gt; $choice ) {
			if ( is_array( $choice ) &amp;&amp; isset( $choice['value'] ) ) {
				$enum[] = $choice['value'];
			} else {
				$enum[] = $key;
			}
		}

		$default = $setting['default'] ?? null;
		if ( isset( $setting['multiple'] ) ) {
			$sanitized_value = array();
			foreach ( (array) $value as $item ) {
				if ( in_array( $item, $enum, true ) ) {
					$sanitized_value[] = $item;
				}
			}

			return $sanitized_value;
		}

		return in_array( $value, $enum, true ) ? $value : $default;
	}

	/**
	 * Default properties
	 *
	 * @return array
	 */
	protected static function get_fields_settings(): array {
		return MetaBoxConfig::get_fields_settings();
	}

	/**
	 * Handle calling property via method
	 *
	 * @param  string $name  The name of the method being called.
	 * @param  array  $args  An enumerated array containing the parameters passed to the $name'ed method.
	 *
	 * @return mixed
	 * @throws BadMethodCallException Exception if not method available.
	 */
	public function __call( string $name, array $args ) {
		if ( preg_match( '/^(?P&lt;prefix&gt;get|is|has|should)_(?P&lt;property&gt;\s*.*)/', $name, $matches ) ) {
			if ( $this-&gt;has_prop( $matches['property'] ) ) {
				if ( in_array( $matches['prefix'], array( 'is', 'has', 'should' ), true ) ) {
					return Validate::checked( $this-&gt;get_prop( $matches['property'] ) );
				}

				return $this-&gt;get_prop( $matches['property'] );
			}
			if ( static::has_global_option( $matches['property'] ) ) {
				return static::get_global_option( $matches['property'] );
			}
		}
		throw new BadMethodCallException(
			'Call to undefined method ' . esc_html( sprintf( '%s::%s()', __CLASS__, $name ) )
		);
	}
}
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