widget_fields = array(
array(
'label' => esc_html__( 'Posts Per Page', 'book-review-blog' ),
'id' => 'postsperpage',
'default' => '4',
'type' => 'number',
),
array(
'label' => esc_html__( 'Show Post Date', 'book-review-blog' ),
'id' => 'showpostdate',
'default' => '1',
'type' => 'checkbox',
),
array(
'label' => esc_html__( 'Category', 'book-review-blog' ),
'id' => 'category',
'default' => '',
'type' => 'select',
'options' => $this->get_category_options(),
),
array(
'label' => esc_html__( 'Show Excerpt', 'book-review-blog' ),
'id' => 'showexcerpt',
'default' => '',
'type' => 'checkbox',
),
array(
'label' => esc_html__( 'Excerpt Length (words)', 'book-review-blog' ),
'id' => 'excerptlength',
'default' => '20',
'type' => 'number',
),
array(
'label' => esc_html__( 'Show Post Author', 'book-review-blog' ),
'id' => 'showpostauthor',
'default' => '',
'type' => 'checkbox',
),
);
}
private $widget_fields;
private function get_category_options() {
$categories = get_categories();
$options = array( '' => esc_html__( 'All Categories', 'book-review-blog' ) );
foreach ( $categories as $category ) {
$options[$category->term_id] = $category->name;
}
return $options;
}
public function widget( $args, $instance ) {
echo $args['before_widget'];
if ( ! empty( $instance['title'] ) ) {
echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'] ) . $args['after_title'];
}
$posts_per_page = ! empty( $instance['postsperpage'] ) ? absint( $instance['postsperpage'] ) : 4;
$show_post_date = ! empty( $instance['showpostdate'] );
$category = ! empty( $instance['category'] ) ? absint( $instance['category'] ) : '';
$show_excerpt = ! empty( $instance['showexcerpt'] );
$excerpt_length = ! empty( $instance['excerptlength'] ) ? absint( $instance['excerptlength'] ) : 20;
$show_post_author = ! empty( $instance['showpostauthor'] );
// Generate cache key
$cache_key = 'book_review_latest_posts_' . md5( serialize( $instance ) );
$output = get_transient( $cache_key );
if ( false === $output ) {
ob_start();
?>
'post',
'posts_per_page' => $posts_per_page,
'ignore_sticky_posts' => true,
);
if ( $category ) {
$query_args['cat'] = $category;
}
$recent_posts = new WP_Query( $query_args );
while ( $recent_posts->have_posts() ) :
$recent_posts->the_post();
$post_classes = 'book-review-blog-recent-post';
if ( ! has_post_thumbnail() ) {
$post_classes .= ' no-post-thumbnail';
}
?>
- >
widget_fields as $widget_field ) {
$default = isset( $widget_field['default'] ) ? $widget_field['default'] : '';
$widget_value = ! empty( $instance[ $widget_field['id'] ] ) ? $instance[ $widget_field['id'] ] : $default;
?>
id="get_field_id( $widget_field['id'] ) ); ?>" name="get_field_name( $widget_field['id'] ) ); ?>" value="1">
field_generator( $instance ); ?>
widget_fields as $widget_field ) {
$id = $widget_field['id'];
switch ( $widget_field['type'] ) {
case 'number':
$instance[$id] = ! empty( $new_instance[$id] ) ? absint( $new_instance[$id] ) : '';
break;
case 'checkbox':
$instance[$id] = ! empty( $new_instance[$id] ) ? '1' : '';
break;
case 'select':
$instance[$id] = ! empty( $new_instance[$id] ) ? absint( $new_instance[$id] ) : '';
break;
default:
$instance[$id] = ! empty( $new_instance[$id] ) ? sanitize_text_field( $new_instance[$id] ) : '';
}
}
// Invalidate cache when settings change
$cache_key = 'book_review_latest_posts_' . md5( serialize( $old_instance ) );
delete_transient( $cache_key );
return $instance;
}
}
function book_review_blog_latest_posts_wr() {
register_widget( 'Book_Review_Blog_Latest_Posts_Widget' );
}
add_action( 'widgets_init', 'book_review_blog_latest_posts_wr' );
// Clear cache when a post is saved
function book_review_blog_clear_widget_cache( $post_id ) {
$widgets = wp_get_sidebars_widgets();
foreach ( $widgets as $sidebar => $widget_list ) {
if ( ! empty( $widget_list ) ) {
foreach ( $widget_list as $widget ) {
if ( strpos( $widget, 'book_review_blog_latest_posts' ) !== false ) {
$settings = get_option( 'widget_book_review_blog_latest_posts' );
foreach ( $settings as $instance ) {
if ( is_array( $instance ) ) {
$cache_key = 'book_review_latest_posts_' . md5( serialize( $instance ) );
delete_transient( $cache_key );
}
}
}
}
}
}
}
add_action( 'save_post', 'book_review_blog_clear_widget_cache' );