woocommerce/widgets/widget-price_filter.php

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<?php
/**
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* Price Filter Widget and related functions
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*
* Generates a range slider to filter products by price
*
* @package WooCommerce
* @category Widgets
* @author WooThemes
*/
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/**
* Price filter Init
*/
add_action('init', 'woocommerce_price_filter_init');
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function woocommerce_price_filter_init() {
unset($_SESSION['min_price']);
unset($_SESSION['max_price']);
if (isset($_GET['min_price'])) :
$_SESSION['min_price'] = $_GET['min_price'];
endif;
if (isset($_GET['max_price'])) :
$_SESSION['max_price'] = $_GET['max_price'];
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endif;
}
/**
* Price Filter post filter
*/
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add_filter('loop_shop_post_in', 'woocommerce_price_filter');
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function woocommerce_price_filter( $filtered_posts ) {
if (isset($_GET['max_price']) && isset($_GET['min_price'])) :
$matched_products = array();
$matched_products_query = get_posts(array(
'post_type' => 'product',
'post_status' => 'publish',
'posts_per_page' => -1,
'meta_query' => array(
array(
'key' => 'price',
'value' => array( $_GET['min_price'], $_GET['max_price'] ),
'type' => 'NUMERIC',
'compare' => 'BETWEEN'
)
)
));
if ($matched_products_query) :
foreach ($matched_products_query as $product) :
$matched_products[] = $product->ID;
if ($product->post_parent>0) $matched_products[] = $product->post_parent;
endforeach;
endif;
// Filter the id's
if (sizeof($filtered_posts)==0) :
$filtered_posts = $matched_products;
$filtered_posts[] = 0;
else :
$filtered_posts = array_intersect($filtered_posts, $matched_products);
$filtered_posts[] = 0;
endif;
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endif;
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return (array) $filtered_posts;
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}
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/**
* Price Filter post Widget
*/
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class WooCommerce_Widget_Price_Filter extends WP_Widget {
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/** Variables to setup the widget. */
var $woo_widget_cssclass;
var $woo_widget_description;
var $woo_widget_idbase;
var $woo_widget_name;
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/** constructor */
function WooCommerce_Widget_Price_Filter() {
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/* Widget variable settings. */
$this->woo_widget_cssclass = 'widget_price_filter';
$this->woo_widget_description = __( 'Shows a price filter slider in a widget which lets you narrow down the list of shown products when viewing product categories.', 'woothemes' );
$this->woo_widget_idbase = 'woocommerce_price_filter';
$this->woo_widget_name = __('WooCommerce Price Filter', 'woothemes' );
/* Widget settings. */
$widget_ops = array( 'classname' => $this->woo_widget_cssclass, 'description' => $this->woo_widget_description );
/* Create the widget. */
$this->WP_Widget('price_filter', $this->woo_widget_name, $widget_ops);
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}
/** @see WP_Widget */
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function widget( $args, $instance ) {
extract($args);
if (!is_tax( 'product_cat' ) && !is_post_type_archive('product') && !is_tax( 'product_tag' )) return;
global $_chosen_attributes, $wpdb, $woocommerce;
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$title = $instance['title'];
$title = apply_filters('widget_title', $title, $instance, $this->id_base);
echo $before_widget . $before_title . $title . $after_title;
// Remember current filters/search
$fields = '';
if (get_search_query()) $fields = '<input type="hidden" name="s" value="'.get_search_query().'" />';
if (isset($_GET['post_type'])) $fields .= '<input type="hidden" name="post_type" value="'.esc_attr( $_GET['post_type'] ).'" />';
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if ($_chosen_attributes) foreach ($_chosen_attributes as $attribute => $value) :
$fields .= '<input type="hidden" name="'.esc_attr( str_replace('pa_', 'filter_', $attribute) ).'" value="'.esc_attr( implode(',', $value) ).'" />';
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endforeach;
$min = 0;
$max = ceil($wpdb->get_var("SELECT max(meta_value + 0)
FROM $wpdb->posts
LEFT JOIN $wpdb->postmeta ON $wpdb->posts.ID = $wpdb->postmeta.post_id
WHERE meta_key = 'price' AND (
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$wpdb->posts.ID IN (".implode(',', $woocommerce->query->layered_nav_product_ids).")
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OR (
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$wpdb->posts.post_parent IN (".implode(',', $woocommerce->query->layered_nav_product_ids).")
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AND $wpdb->posts.post_parent != 0
)
)"));
echo '<form method="get" action="">
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<div class="price_slider_wrapper">
<div class="price_slider"></div>
<div class="price_slider_amount">
<button type="submit" class="button">'.__('Filter', 'woothemes').'</button>'.__('Price:', 'woothemes').' <span></span>
<input type="hidden" id="max_price" name="max_price" value="'.esc_attr( $max ).'" />
<input type="hidden" id="min_price" name="min_price" value="'.esc_attr( $min ).'" />
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'.$fields.'
</div>
</div>
</form>';
echo $after_widget;
}
/** @see WP_Widget->update */
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function update( $new_instance, $old_instance ) {
if (!isset($new_instance['title']) || empty($new_instance['title'])) $new_instance['title'] = __('Filter by price', 'woothemes');
$instance['title'] = strip_tags(stripslashes($new_instance['title']));
return $instance;
}
/** @see WP_Widget->form */
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function form( $instance ) {
global $wpdb;
?>
<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:', 'woothemes') ?></label>
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<input type="text" class="widefat" id="<?php echo esc_attr( $this->get_field_id('title') ); ?>" name="<?php echo esc_attr( $this->get_field_name('title') ); ?>" value="<?php if (isset ( $instance['title'])) {echo esc_attr( $instance['title'] );} ?>" /></p>
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<?php
}
} // class WooCommerce_Widget_Price_Filter