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Edit File: abstract-kkart-widget.php

<?php
/**
 * Abstract widget class
 *
 * @class KKART_Widget
 * @package  Kkart\Abstracts
 */

use Automattic\Jetpack\Constants;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * KKART_Widget
 *
 * @package  Kkart\Abstracts
 * @version  2.5.0
 * @extends  WP_Widget
 */
abstract class KKART_Widget extends WP_Widget {

/**
	 * CSS class.
	 *
	 * @var string
	 */
	public $widget_cssclass;

/**
	 * Widget description.
	 *
	 * @var string
	 */
	public $widget_description;

/**
	 * Widget ID.
	 *
	 * @var string
	 */
	public $widget_id;

/**
	 * Widget name.
	 *
	 * @var string
	 */
	public $widget_name;

/**
	 * Settings.
	 *
	 * @var array
	 */
	public $settings;

/**
	 * Constructor.
	 */
	public function __construct() {
		$widget_ops = array(
			'classname'                   => $this->widget_cssclass,
			'description'                 => $this->widget_description,
			'customize_selective_refresh' => true,
		);

parent::__construct( $this->widget_id, $this->widget_name, $widget_ops );

add_action( 'save_post', array( $this, 'flush_widget_cache' ) );
		add_action( 'deleted_post', array( $this, 'flush_widget_cache' ) );
		add_action( 'switch_theme', array( $this, 'flush_widget_cache' ) );
	}

/**
	 * Get cached widget.
	 *
	 * @param  array $args Arguments.
	 * @return bool true if the widget is cached otherwise false
	 */
	public function get_cached_widget( $args ) {
		// Don't get cache if widget_id doesn't exists.
		if ( empty( $args['widget_id'] ) ) {
			return false;
		}

$cache = wp_cache_get( $this->get_widget_id_for_cache( $this->widget_id ), 'widget' );

if ( ! is_array( $cache ) ) {
			$cache = array();
		}

if ( isset( $cache[ $this->get_widget_id_for_cache( $args['widget_id'] ) ] ) ) {
			echo $cache[ $this->get_widget_id_for_cache( $args['widget_id'] ) ]; // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped
			return true;
		}

return false;
	}

/**
	 * Cache the widget.
	 *
	 * @param  array  $args Arguments.
	 * @param  string $content Content.
	 * @return string the content that was cached
	 */
	public function cache_widget( $args, $content ) {
		// Don't set any cache if widget_id doesn't exist.
		if ( empty( $args['widget_id'] ) ) {
			return $content;
		}

$cache = wp_cache_get( $this->get_widget_id_for_cache( $this->widget_id ), 'widget' );

if ( ! is_array( $cache ) ) {
			$cache = array();
		}

$cache[ $this->get_widget_id_for_cache( $args['widget_id'] ) ] = $content;

wp_cache_set( $this->get_widget_id_for_cache( $this->widget_id ), $cache, 'widget' );

return $content;
	}

/**
	 * Flush the cache.
	 */
	public function flush_widget_cache() {
		foreach ( array( 'https', 'http' ) as $scheme ) {
			wp_cache_delete( $this->get_widget_id_for_cache( $this->widget_id, $scheme ), 'widget' );
		}
	}

/**
	 * Get this widgets title.
	 *
	 * @param array $instance Array of instance options.
	 * @return string
	 */
	protected function get_instance_title( $instance ) {
		if ( isset( $instance['title'] ) ) {
			return $instance['title'];
		}

if ( isset( $this->settings, $this->settings['title'], $this->settings['title']['std'] ) ) {
			return $this->settings['title']['std'];
		}

return '';
	}

/**
	 * Output the html at the start of a widget.
	 *
	 * @param array $args Arguments.
	 * @param array $instance Instance.
	 */
	public function widget_start( $args, $instance ) {
		echo $args['before_widget']; // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped

$title = apply_filters( 'widget_title', $this->get_instance_title( $instance ), $instance, $this->id_base );

if ( $title ) {
			echo $args['before_title'] . $title . $args['after_title']; // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped
		}
	}

/**
	 * Output the html at the end of a widget.
	 *
	 * @param  array $args Arguments.
	 */
	public function widget_end( $args ) {
		echo $args['after_widget']; // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped
	}

/**
	 * Updates a particular instance of a widget.
	 *
	 * @see    WP_Widget->update
	 * @param  array $new_instance New instance.
	 * @param  array $old_instance Old instance.
	 * @return array
	 */
	public function update( $new_instance, $old_instance ) {

$instance = $old_instance;

if ( empty( $this->settings ) ) {
			return $instance;
		}

// Loop settings and get values to save.
		foreach ( $this->settings as $key => $setting ) {
			if ( ! isset( $setting['type'] ) ) {
				continue;
			}

// Format the value based on settings type.
			switch ( $setting['type'] ) {
				case 'number':
					$instance[ $key ] = absint( $new_instance[ $key ] );

if ( isset( $setting['min'] ) && '' !== $setting['min'] ) {
						$instance[ $key ] = max( $instance[ $key ], $setting['min'] );
					}

if ( isset( $setting['max'] ) && '' !== $setting['max'] ) {
						$instance[ $key ] = min( $instance[ $key ], $setting['max'] );
					}
					break;
				case 'textarea':
					$instance[ $key ] = wp_kses( trim( wp_unslash( $new_instance[ $key ] ) ), wp_kses_allowed_html( 'post' ) );
					break;
				case 'checkbox':
					$instance[ $key ] = empty( $new_instance[ $key ] ) ? 0 : 1;
					break;
				default:
					$instance[ $key ] = isset( $new_instance[ $key ] ) ? sanitize_text_field( $new_instance[ $key ] ) : $setting['std'];
					break;
			}

/**
			 * Sanitize the value of a setting.
			 */
			$instance[ $key ] = apply_filters( 'kkart_widget_settings_sanitize_option', $instance[ $key ], $new_instance, $key, $setting );
		}

$this->flush_widget_cache();

return $instance;
	}

/**
	 * Outputs the settings update form.
	 *
	 * @see   WP_Widget->form
	 *
	 * @param array $instance Instance.
	 */
	public function form( $instance ) {

if ( empty( $this->settings ) ) {
			return;
		}

foreach ( $this->settings as $key => $setting ) {

$class = isset( $setting['class'] ) ? $setting['class'] : '';
			$value = isset( $instance[ $key ] ) ? $instance[ $key ] : $setting['std'];

switch ( $setting['type'] ) {

case 'text':
					?>
					<p>
						<label for="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>"><?php echo wp_kses_post( $setting['label'] ); ?></label><?php // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped ?>
						<input class="widefat <?php echo esc_attr( $class ); ?>" id="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( $key ) ); ?>" type="text" value="<?php echo esc_attr( $value ); ?>" />
					</p>
					<?php
					break;

case 'number':
					?>
					<p>
						<label for="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>"><?php echo $setting['label']; /* phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped */ ?></label>
						<input class="widefat <?php echo esc_attr( $class ); ?>" id="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( $key ) ); ?>" type="number" step="<?php echo esc_attr( $setting['step'] ); ?>" min="<?php echo esc_attr( $setting['min'] ); ?>" max="<?php echo esc_attr( $setting['max'] ); ?>" value="<?php echo esc_attr( $value ); ?>" />
					</p>
					<?php
					break;

case 'select':
					?>
					<p>
						<label for="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>"><?php echo $setting['label']; /* phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped */ ?></label>
						<select class="widefat <?php echo esc_attr( $class ); ?>" id="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( $key ) ); ?>">
							<?php foreach ( $setting['options'] as $option_key => $option_value ) : ?>
								<option value="<?php echo esc_attr( $option_key ); ?>" <?php selected( $option_key, $value ); ?>><?php echo esc_html( $option_value ); ?></option>
							<?php endforeach; ?>
						</select>
					</p>
					<?php
					break;

case 'textarea':
					?>
					<p>
						<label for="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>"><?php echo $setting['label']; /* phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped */ ?></label>
						<textarea class="widefat <?php echo esc_attr( $class ); ?>" id="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( $key ) ); ?>" cols="20" rows="3"><?php echo esc_textarea( $value ); ?></textarea>
						<?php if ( isset( $setting['desc'] ) ) : ?>
							<small><?php echo esc_html( $setting['desc'] ); ?></small>
						<?php endif; ?>
					</p>
					<?php
					break;

case 'checkbox':
					?>
					<p>
						<input class="checkbox <?php echo esc_attr( $class ); ?>" id="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( $key ) ); ?>" type="checkbox" value="1" <?php checked( $value, 1 ); ?> />
						<label for="<?php echo esc_attr( $this->get_field_id( $key ) ); ?>"><?php echo $setting['label']; /* phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped */ ?></label>
					</p>
					<?php
					break;

// Default: run an action.
				default:
					do_action( 'kkart_widget_field_' . $setting['type'], $key, $value, $setting, $instance );
					break;
			}
		}
	}

/**
	 * Get current page URL with various filtering props supported by KKART.
	 *
	 * @return string
	 * @since  3.3.0
	 */
	protected function get_current_page_url() {
		if ( Constants::is_defined( 'SHOP_IS_ON_FRONT' ) ) {
			$link = home_url();
		} elseif ( is_shop() ) {
			$link = get_permalink( kkart_get_page_id( 'shop' ) );
		} elseif ( is_product_category() ) {
			$link = get_term_link( get_query_var( 'product_cat' ), 'product_cat' );
		} elseif ( is_product_tag() ) {
			$link = get_term_link( get_query_var( 'product_tag' ), 'product_tag' );
		} else {
			$queried_object = get_queried_object();
			$link           = get_term_link( $queried_object->slug, $queried_object->taxonomy );
		}

// Min/Max.
		if ( isset( $_GET['min_price'] ) ) {
			$link = add_query_arg( 'min_price', kkart_clean( wp_unslash( $_GET['min_price'] ) ), $link );
		}

if ( isset( $_GET['max_price'] ) ) {
			$link = add_query_arg( 'max_price', kkart_clean( wp_unslash( $_GET['max_price'] ) ), $link );
		}

// Order by.
		if ( isset( $_GET['orderby'] ) ) {
			$link = add_query_arg( 'orderby', kkart_clean( wp_unslash( $_GET['orderby'] ) ), $link );
		}

/**
		 * Search Arg.
		 * To support quote characters, first they are decoded from &quot; entities, then URL encoded.
		 */
		if ( get_search_query() ) {
			$link = add_query_arg( 's', rawurlencode( htmlspecialchars_decode( get_search_query() ) ), $link );
		}

// Post Type Arg.
		if ( isset( $_GET['post_type'] ) ) {
			$link = add_query_arg( 'post_type', kkart_clean( wp_unslash( $_GET['post_type'] ) ), $link );

// Prevent post type and page id when pretty permalinks are disabled.
			if ( is_shop() ) {
				$link = remove_query_arg( 'page_id', $link );
			}
		}

// Min Rating Arg.
		if ( isset( $_GET['rating_filter'] ) ) {
			$link = add_query_arg( 'rating_filter', kkart_clean( wp_unslash( $_GET['rating_filter'] ) ), $link );
		}

// All current filters.
		if ( $_chosen_attributes = KKART_Query::get_layered_nav_chosen_attributes() ) { // phpcs:ignore Squiz.PHP.DisallowMultipleAssignments.Found, WordPress.CodeAnalysis.AssignmentInCondition.Found
			foreach ( $_chosen_attributes as $name => $data ) {
				$filter_name = kkart_attribute_taxonomy_slug( $name );
				if ( ! empty( $data['terms'] ) ) {
					$link = add_query_arg( 'filter_' . $filter_name, implode( ',', $data['terms'] ), $link );
				}
				if ( 'or' === $data['query_type'] ) {
					$link = add_query_arg( 'query_type_' . $filter_name, 'or', $link );
				}
			}
		}

return apply_filters( 'kkart_widget_get_current_page_url', $link, $this );
	}

/**
	 * Get widget id plus scheme/protocol to prevent serving mixed content from (persistently) cached widgets.
	 *
	 * @since  3.4.0
	 * @param  string $widget_id Id of the cached widget.
	 * @param  string $scheme    Scheme for the widget id.
	 * @return string            Widget id including scheme/protocol.
	 */
	protected function get_widget_id_for_cache( $widget_id, $scheme = '' ) {
		if ( $scheme ) {
			$widget_id_for_cache = $widget_id . '-' . $scheme;
		} else {
			$widget_id_for_cache = $widget_id . '-' . ( is_ssl() ? 'https' : 'http' );
		}

return apply_filters( 'kkart_cached_widget_id', $widget_id_for_cache );
	}
}