widget_cssclass = 'woocommerce widget_layered_nav';
$this->widget_description = __( 'Shows a custom attribute in a widget which lets you narrow down the list of products when viewing product categories.', 'woocommerce' );
$this->widget_id = 'woocommerce_layered_nav';
$this->widget_name = __( 'WooCommerce Layered Nav', 'woocommerce' );
parent::__construct();
}
/**
* Updates a particular instance of a widget.
*
* @see WP_Widget->update
*
* @param array $new_instance
* @param array $old_instance
*
* @return array
*/
public function update( $new_instance, $old_instance ) {
$this->init_settings();
return parent::update( $new_instance, $old_instance );
}
/**
* Outputs the settings update form.
*
* @see WP_Widget->form
*
* @param array $instance
*/
public function form( $instance ) {
$this->init_settings();
parent::form( $instance );
}
/**
* Init settings after post types are registered.
*/
public function init_settings() {
$attribute_array = array();
$attribute_taxonomies = wc_get_attribute_taxonomies();
if ( $attribute_taxonomies ) {
foreach ( $attribute_taxonomies as $tax ) {
if ( taxonomy_exists( wc_attribute_taxonomy_name( $tax->attribute_name ) ) ) {
$attribute_array[ $tax->attribute_name ] = $tax->attribute_name;
}
}
}
$this->settings = array(
'title' => array(
'type' => 'text',
'std' => __( 'Filter by', 'woocommerce' ),
'label' => __( 'Title', 'woocommerce' )
),
'attribute' => array(
'type' => 'select',
'std' => '',
'label' => __( 'Attribute', 'woocommerce' ),
'options' => $attribute_array
),
'display_type' => array(
'type' => 'select',
'std' => 'list',
'label' => __( 'Display type', 'woocommerce' ),
'options' => array(
'list' => __( 'List', 'woocommerce' ),
'dropdown' => __( 'Dropdown', 'woocommerce' )
)
),
'query_type' => array(
'type' => 'select',
'std' => 'and',
'label' => __( 'Query type', 'woocommerce' ),
'options' => array(
'and' => __( 'AND', 'woocommerce' ),
'or' => __( 'OR', 'woocommerce' )
)
),
);
}
/**
* Output widget.
*
* @see WP_Widget
*
* @param array $args
* @param array $instance
*/
public function widget( $args, $instance ) {
if ( ! is_post_type_archive( 'product' ) && ! is_tax( get_object_taxonomies( 'product' ) ) ) {
return;
}
$_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes();
$taxonomy = isset( $instance['attribute'] ) ? wc_attribute_taxonomy_name( $instance['attribute'] ) : $this->settings['attribute']['std'];
$query_type = isset( $instance['query_type'] ) ? $instance['query_type'] : $this->settings['query_type']['std'];
$display_type = isset( $instance['display_type'] ) ? $instance['display_type'] : $this->settings['display_type']['std'];
if ( ! taxonomy_exists( $taxonomy ) ) {
return;
}
$get_terms_args = array( 'hide_empty' => '1' );
$orderby = wc_attribute_orderby( $taxonomy );
switch ( $orderby ) {
case 'name' :
$get_terms_args['orderby'] = 'name';
$get_terms_args['menu_order'] = false;
break;
case 'id' :
$get_terms_args['orderby'] = 'id';
$get_terms_args['order'] = 'ASC';
$get_terms_args['menu_order'] = false;
break;
case 'menu_order' :
$get_terms_args['menu_order'] = 'ASC';
break;
}
$terms = get_terms( $taxonomy, $get_terms_args );
if ( 0 === sizeof( $terms ) ) {
return;
}
ob_start();
$this->widget_start( $args, $instance );
if ( 'dropdown' === $display_type ) {
$found = $this->layered_nav_dropdown( $terms, $taxonomy, $query_type );
} else {
$found = $this->layered_nav_list( $terms, $taxonomy, $query_type );
}
$this->widget_end( $args );
// Force found when option is selected - do not force found on taxonomy attributes
if ( ! is_tax() && is_array( $_chosen_attributes ) && array_key_exists( $taxonomy, $_chosen_attributes ) ) {
$found = true;
}
if ( ! $found ) {
ob_end_clean();
} else {
echo ob_get_clean();
}
}
/**
* Return the currently viewed taxonomy name.
* @return string
*/
protected function get_current_taxonomy() {
return is_tax() ? get_queried_object()->taxonomy : '';
}
/**
* Return the currently viewed term ID.
* @return int
*/
protected function get_current_term_id() {
return absint( is_tax() ? get_queried_object()->term_id : 0 );
}
/**
* Return the currently viewed term slug.
* @return int
*/
protected function get_current_term_slug() {
return absint( is_tax() ? get_queried_object()->slug : 0 );
}
/**
* Show dropdown layered nav.
* @param array $terms
* @param string $taxonomy
* @param string $query_type
* @return bool Will nav display?
*/
protected function layered_nav_dropdown( $terms, $taxonomy, $query_type ) {
$found = false;
if ( $taxonomy !== $this->get_current_taxonomy() ) {
$term_counts = $this->get_filtered_term_product_counts( wp_list_pluck( $terms, 'term_id' ), $taxonomy, $query_type );
$_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes();
$taxonomy_filter_name = str_replace( 'pa_', '', $taxonomy );
echo '';
wc_enqueue_js( "
jQuery( '.dropdown_layered_nav_". esc_js( $taxonomy_filter_name ) . "' ).change( function() {
var slug = jQuery( this ).val();
location.href = '" . preg_replace( '%\/page\/[0-9]+%', '', str_replace( array( '&', '%2C' ), array( '&', ',' ), esc_js( add_query_arg( 'filtering', '1', remove_query_arg( array( 'page', 'filter_' . $taxonomy_filter_name ) ) ) ) ) ) . "&filter_". esc_js( $taxonomy_filter_name ) . "=' + slug;
});
" );
}
return $found;
}
/**
* Get current page URL for layered nav items.
* @return string
*/
protected function get_page_base_url( $taxonomy ) {
if ( defined( 'SHOP_IS_ON_FRONT' ) ) {
$link = home_url();
} elseif ( is_post_type_archive( 'product' ) || is_page( wc_get_page_id('shop') ) ) {
$link = get_post_type_archive_link( 'product' );
} else {
$link = get_term_link( get_query_var('term'), get_query_var('taxonomy') );
}
// Min/Max
if ( isset( $_GET['min_price'] ) ) {
$link = add_query_arg( 'min_price', wc_clean( $_GET['min_price'] ), $link );
}
if ( isset( $_GET['max_price'] ) ) {
$link = add_query_arg( 'max_price', wc_clean( $_GET['max_price'] ), $link );
}
// Orderby
if ( isset( $_GET['orderby'] ) ) {
$link = add_query_arg( 'orderby', wc_clean( $_GET['orderby'] ), $link );
}
/**
* Search Arg.
* To support quote characters, first they are decoded from " 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', wc_clean( $_GET['post_type'] ), $link );
}
// Min Rating Arg
if ( isset( $_GET['min_rating'] ) ) {
$link = add_query_arg( 'min_rating', wc_clean( $_GET['min_rating'] ), $link );
}
// All current filters
if ( $_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes() ) {
foreach ( $_chosen_attributes as $name => $data ) {
if ( $name === $taxonomy ) {
continue;
}
$filter_name = sanitize_title( str_replace( 'pa_', '', $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 $link;
}
/**
* Count products within certain terms, taking the main WP query into consideration.
* @param array $term_ids
* @param string $taxonomy
* @param string $query_type
* @return array
*/
protected function get_filtered_term_product_counts( $term_ids, $taxonomy, $query_type ) {
global $wpdb;
$tax_query = WC_Query::get_main_tax_query();
$meta_query = WC_Query::get_main_meta_query();
if ( 'or' === $query_type ) {
foreach ( $tax_query as $key => $query ) {
if ( $taxonomy === $query['taxonomy'] ) {
unset( $tax_query[ $key ] );
}
}
}
$meta_query = new WP_Meta_Query( $meta_query );
$tax_query = new WP_Tax_Query( $tax_query );
$meta_query_sql = $meta_query->get_sql( 'post', $wpdb->posts, 'ID' );
$tax_query_sql = $tax_query->get_sql( $wpdb->posts, 'ID' );
$sql = "
SELECT COUNT( {$wpdb->posts}.ID ) as term_count, term_count_relationships.term_taxonomy_id as term_count_id FROM {$wpdb->posts}
INNER JOIN {$wpdb->term_relationships} AS term_count_relationships ON ({$wpdb->posts}.ID = term_count_relationships.object_id)
" . $tax_query_sql['join'] . $meta_query_sql['join'] . "
WHERE {$wpdb->posts}.post_type = 'product' AND {$wpdb->posts}.post_status = 'publish'
" . $tax_query_sql['where'] . $meta_query_sql['where'] . "
AND term_count_relationships.term_taxonomy_id IN (" . implode( ',', array_map( 'absint', $term_ids ) ) . ")
GROUP BY term_count_relationships.term_taxonomy_id;
";
$results = $wpdb->get_results( $sql );
return wp_list_pluck( $results, 'term_count', 'term_count_id' );
}
/**
* Show list based layered nav.
* @param array $terms
* @param string $taxonomy
* @param string $query_type
* @return bool Will nav display?
*/
protected function layered_nav_list( $terms, $taxonomy, $query_type ) {
// List display
echo '';
$term_counts = $this->get_filtered_term_product_counts( wp_list_pluck( $terms, 'term_id' ), $taxonomy, $query_type );
$_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes();
$found = false;
foreach ( $terms as $term ) {
$current_values = isset( $_chosen_attributes[ $taxonomy ]['terms'] ) ? $_chosen_attributes[ $taxonomy ]['terms'] : array();
$option_is_set = in_array( $term->slug, $current_values );
$count = isset( $term_counts[ $term->term_id ] ) ? $term_counts[ $term->term_id ] : 0;
// skip the term for the current archive
if ( $this->get_current_term_id() === $term->term_id ) {
continue;
}
// Only show options with count > 0
if ( 0 < $count ) {
$found = true;
} elseif ( 'and' === $query_type && 0 === $count && ! $option_is_set ) {
continue;
}
$filter_name = 'filter_' . sanitize_title( str_replace( 'pa_', '', $taxonomy ) );
$current_filter = isset( $_GET[ $filter_name ] ) ? explode( ',', wc_clean( $_GET[ $filter_name ] ) ) : array();
$current_filter = array_map( 'sanitize_title', $current_filter );
if ( ! in_array( $term->slug, $current_filter ) ) {
$current_filter[] = $term->slug;
}
$link = $this->get_page_base_url( $taxonomy );
// Add current filters to URL.
foreach ( $current_filter as $key => $value ) {
// Exclude query arg for current term archive term
if ( $value === $this->get_current_term_slug() ) {
unset( $current_filter[ $key ] );
}
// Exclude self so filter can be unset on click.
if ( $option_is_set && $value === $term->slug ) {
unset( $current_filter[ $key ] );
}
}
if ( ! empty( $current_filter ) ) {
$link = add_query_arg( $filter_name, implode( ',', $current_filter ), $link );
// Add Query type Arg to URL
if ( $query_type === 'or' && ! ( 1 === sizeof( $current_filter ) && $option_is_set ) ) {
$link = add_query_arg( 'query_type_' . sanitize_title( str_replace( 'pa_', '', $taxonomy ) ), 'or', $link );
}
}
echo '- ';
echo ( $count > 0 || $option_is_set ) ? '' : '';
echo esc_html( $term->name );
echo ( $count > 0 || $option_is_set ) ? '' : '';
echo ' (' . absint( $count ) . ')
';
}
echo '
';
return $found;
}
}