<?php
/**
* Vmag: Category Posts (Slider)
*
* Widget to display selected category posts as on slider style.
*
* @package VMag
*/
add_action( 'widgets_init', 'vmag_register_category_posts_slider_widget' );
function vmag_register_category_posts_slider_widget() {
register_widget( 'vmag_category_posts_slider' );
}
class Vmag_Category_Posts_Slider extends WP_Widget {
/**
* Register widget with WordPress.
*/
public function __construct() {
$widget_ops = array(
'classname' => 'vmag_category_posts_slider',
'description' => __( 'This widget for showing posts from selected category as slider.', 'vmag' )
);
parent::__construct( 'vmag_category_posts_slider', __( 'VMag: Category Posts(Slider)', 'vmag' ), $widget_ops );
}
/**
* Helper function that holds widget fields
* Array is used in update and form functions
*/
private function widget_fields() {
global $vmag_cat_dropdown;
$fields = array(
'block_layout' => array(
'vmag_widgets_name' => 'block_layout',
'vmag_widgets_title' => __( 'Category Posts (Slider) layout', 'vmag' ),
'vmag_widgets_layout_img' => get_template_directory_uri() .'/inc/assets/images/category-slider.png',
'vmag_widgets_field_type' => 'widget_layout_image'
),
'block_title' => array(
'vmag_widgets_name' => 'block_title',
'vmag_widgets_title' => __( 'Block Title', 'vmag' ),
'vmag_widgets_field_type' => 'text'
),
'block_title_url' => array(
'vmag_widgets_name' => 'block_title_url',
'vmag_widgets_title' => __( 'Block Title Url', 'vmag' ),
'vmag_widgets_field_type' => 'url'
),
'block_posts_count' => array(
'vmag_widgets_name' => 'block_posts_count',
'vmag_widgets_title' => __( 'No. of Posts', 'vmag' ),
'vmag_widgets_default' => 4,
'vmag_widgets_field_type' => 'number'
),
'block_post_category' => array(
'vmag_widgets_name' => 'block_post_category',
'vmag_widgets_title' => __( 'Select Category for Slider', 'vmag' ),
'vmag_widgets_default' => 0,
'vmag_widgets_field_type' => 'select',
'vmag_widgets_field_options' => $vmag_cat_dropdown
)
);
return $fields;
}
/**
* Front-end display of widget.
*
* @see WP_Widget::widget()
*
* @param array $args Widget arguments.
* @param array $instance Saved values from database.
*/
public function widget( $args, $instance ) {
extract( $args );
if( empty( $instance ) ) {
return ;
}
$vmag_block_title = empty( $instance['block_title'] ) ? '' : $instance['block_title'];
$vmag_block_title_url = empty( $instance['block_title_url'] ) ? '' : $instance['block_title_url'];
$vmag_block_posts_count = empty( $instance['block_posts_count'] ) ? 4 : $instance['block_posts_count'];
$vmag_block_cat_id = empty( $instance['block_post_category'] ) ? null: $instance['block_post_category'];
echo wp_kses_post($before_widget);
?>
<div class="block-post-wrapper">
<?php vmag_widget_title( $vmag_block_title, $vmag_block_title_url ); ?>
<?php
if( !empty( $vmag_block_cat_id ) ) {
$block_args = array(
'post_type' => 'post',
'category__in' => $vmag_block_cat_id,
'posts_per_page' => $vmag_block_posts_count,
);
$block_query = new WP_Query( $block_args );
if( $block_query->have_posts() ) {
echo '<ul class="widget-cat-slider cS-hidden">';
while( $block_query->have_posts() ) {
$block_query->the_post();
$image_id = get_post_thumbnail_id();
$image_path = wp_get_attachment_image_src( $image_id, 'vmag-vertical-slider-thumb', true );
$image_alt = get_post_meta( $image_id, '_wp_attachment_image_alt', true );
if( has_post_thumbnail() ) {
?>
<li class="single-post clearfix">
<div class="post-thumb">
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<img src="<?php echo esc_url( $image_path[0] ); ?>" alt="<?php echo esc_attr( $image_alt ); ?>" title="<?php the_title(); ?>" />
</a>
</div>
<div class="post-caption">
<?php do_action( 'vmag_post_tag_lists' ); ?>
<h3 class="large-font"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h3>
<div class="post-meta">
<?php do_action( 'vmag_post_meta' ); ?>
</div>
</div><!-- .post-caption -->
</li><!-- .single-post -->
<?php
}
}
echo '</ul>';
}
}
wp_reset_query();
?>
</div><!-- .block-post-wrapper -->
<?php
echo wp_kses_post($after_widget);
}
/**
* Sanitize widget form values as they are saved.
*
* @see WP_Widget::update()
*
* @param array $new_instance Values just sent to be saved.
* @param array $old_instance Previously saved values from database.
*
* @uses vmag_widgets_updated_field_value() defined in vmag-widget-fields.php
*
* @return array Updated safe values to be saved.
*/
public function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$widget_fields = $this->widget_fields();
// Loop through fields
foreach ( $widget_fields as $widget_field ) {
extract( $widget_field );
// Use helper function to get updated field values
$instance[$vmag_widgets_name] = vmag_widgets_updated_field_value( $widget_field, $new_instance[$vmag_widgets_name] );
}
return $instance;
}
/**
* Back-end widget form.
*
* @see WP_Widget::form()
*
* @param array $instance Previously saved values from database.
*
* @uses vmag_widgets_show_widget_field() defined in vmag-widget-fields.php
*/
public function form( $instance ) {
$widget_fields = $this->widget_fields();
// Loop through fields
foreach ( $widget_fields as $widget_field ) {
// Make array elements available as variables
extract( $widget_field );
$vmag_widgets_field_value = !empty( $instance[$vmag_widgets_name]) ? esc_attr($instance[$vmag_widgets_name] ) : '';
vmag_widgets_show_widget_field( $this, $widget_field, $vmag_widgets_field_value );
}
}
}