/**
 * display post view count for given post
 * @param array $args  an array of posts info contain: post_id, permalink, title
 * @param $display  display or return
 */
function hwpvc_post_views($args = array(), $display = true)
{
    if (isset($args['post_id'])) {
        $post_id = $args['post_id'];
    } else {
        $post_id = get_the_ID();
    }
    //get permalink
    if (isset($args['permalink'])) {
        $permalink = $args['permalink'];
    } else {
        $permalink = '';
    }
    //get default from function get_permalink();, but stored in __hw_post_views_count variable
    //get title
    if (isset($args['title'])) {
        $title = $args['title'];
    } else {
        $title = '';
    }
    //get default from function get_the_title();, but stored in __hw_post_views_count variable
    //allow to update views
    if (isset($args['count']) && $args['count']) {
        $count = 'true';
    } else {
        $count = 'false';
    }
    // get all data
    $options = Post_Views_Counter()->get_attribute('options', 'display');
    $hw_options = HW_Post_Views_Counter()->get_attribute('options', 'hoangweb');
    //hoangweb options
    //    $views = pvc_get_post_views( $post_id );
    //prepare display
    $label = apply_filters('pvc_post_views_label', function_exists('icl_t') ? icl_t('Post Views Counter', 'Post Views Label', $options['label']) : $options['label'], $post_id);
    $icon_class = $options['icon_class'] !== '' ? ' ' . esc_attr($options['icon_class']) : '';
    $icon = apply_filters('pvc_post_views_icon', '<span class="hw-hidden post-views-icon dashicons ' . $icon_class . '"></span>', $post_id);
    $use_firebase = isset($hw_options['use_firebase']) ? $hw_options['use_firebase'] : '';
    $view = '<div class="hw-post-views-icon post-views post-' . $post_id . ' entry-meta">' . ($options['display_style']['icon'] && $icon_class !== '' ? $icon : '') . ($options['display_style']['text'] ? '<span class="post-views-label">' . $label . ' </span>' : '') . '<span title="' . $title . '" class="post-views-count hw-post-views-count preloading" data-count="' . $count . '" data-permalink="' . $permalink . '" data-id="' . $post_id . '" data-title="' . $title . '">
        <!-- js process -->
    </span></div>';
    $view = apply_filters('pvc_post_views_html', $view, $args, $use_firebase, $icon);
    if ($display) {
        echo $view;
    } else {
        return $view;
    }
}
    /**
     * display field for firebase path
     */
    public function hw_firebase_path_field()
    {
        $firebase_path = esc_attr(HW_Post_Views_Counter()->get_attribute('options', 'hoangweb', 'firebase_path'));
        echo '
		<div id="hw_pvc_firebase_path">
			<fieldset>
				<input id="pvc-hw-firebase-path" type="text" name="post_views_counter_settings_hoangweb[firebase_path]" value="' . $firebase_path . '"/><label for="pvc-hw-firebase-path"></label> <p>' . esc_html__('Nhập địa chỉ firebase bạn muốn lưu trữ bộ đếm post views. VD: /hoangwebcom/.', 'post-views-counter') . '</p>
			</fieldset>
		</div>';
    }
 /**
  * frontend scripts styles
  */
 public function _frontend_scripts_styles()
 {
     //$post_types = Post_Views_Counter()->get_attribute( 'options', 'display', 'post_types_display' );
     $post_types = Post_Views_Counter()->get_attribute('options', 'general', 'post_types_count');
     $hwpvc_options = HW_Post_Views_Counter()->get_attribute('options', 'hoangweb');
     $this->serialize_obj['options'] = $hwpvc_options;
     //get current post
     $post_id = get_the_ID();
     //single post or inside loop posts
     if ($post_id) {
         $this->serialize_obj['postID'] = $post_id;
         $this->serialize_obj['postType'] = get_post_type();
         $this->serialize_obj['post_title'] = get_the_title($post_id);
         $this->serialize_obj['post_permalink'] = get_permalink($post_id);
     }
     // whether to count this post type or not
     if (is_single() && (empty($post_types) || !is_singular($post_types))) {
         //allow all
         return;
     }
     //firebase lib
     if (isset($hwpvc_options['use_firebase']) && $hwpvc_options['use_firebase']) {
         wp_register_script('firebase.js', 'https://cdn.firebase.com/js/client/2.2.6/firebase.js');
         wp_enqueue_script('firebase.js');
     }
     //css
     wp_register_style('hw-post-views-counter-frontend', HWPVC_PLUGIN_URL . '/css/hw-frontend.css');
     wp_enqueue_style('hw-post-views-counter-frontend');
     //js
     wp_register_script('hw-post-views-counter-frontend', HWPVC_PLUGIN_URL . '/js/hw-frontend.js', array('jquery'));
     wp_enqueue_script('hw-post-views-counter-frontend');
     wp_localize_script('hw-post-views-counter-frontend', '__hw_post_views_count', $this->serialize_obj);
 }