News Feed Follow, Subscribe User ( ok)

https://github.com/iantsch/mbtNewsFeed

Ví dụ 1: Sử dụng trên theme (ok)

C:\xampp\htdocs\style2\wp-content\themes\gutener\functions.php

// follow 
function mbt_news_feed_init() {
  if(array_key_exists('action', $_REQUEST) && in_array($_REQUEST['action'], mbt_news_feed_valid_actions())) {
    do_action( 'wp_ajax_' . $_REQUEST['action'] );
  }
}
function mbt_news_feed_pre_get_posts($query) {
  if (is_user_logged_in()) {
    if ( $query->is_main_query() && $query->is_home() && !is_admin()) {
      $current_user = wp_get_current_user();
      $followers = get_user_meta( $current_user->data->ID, 'following', true);
      if (is_array($followers) && !empty($followers)) {
        $followers = array_keys($followers);
        $followers[] = $current_user->data->ID;
        $query->set('author__in', $followers);
      }
    }
  }
  return $query;
}
function mbt_news_feed_is_following($user_id) {
  $user_id_current = get_current_user_id();
  $followers = get_user_meta( $user_id_current, 'following', true);
  if (empty($followers)) {
    return false;
  }
  if (array_key_exists($user_id, $followers)) {
    return true;
  }
  return false;
}
function mbt_news_feed_helper_check_data() {
  if(!wp_verify_nonce( $_POST['security'], 'file_upload' )) {
    die(-1);
  }
  if (!array_key_exists('user_id', $_POST)) {
    die(-1);
  }
  $user_id = absint($_POST['user_id']);
  if ($user_id < 1) {
    die(-1);
  }
  return $user_id;
}
function mbt_following() {
  $user_id = mbt_news_feed_helper_check_data();
  $current_user_id = get_current_user_id();
  $followers = get_user_meta( $current_user_id, 'following', true);
  if (!is_array($followers)){
    $followers = array();
  }
  $followers[$user_id] = $current_user_id;
  update_user_meta( $current_user_id, 'following', $followers );
  echo mbt_news_feed_button($user_id, false);
  exit;
}
function mbt_follow() {
  $user_id = mbt_news_feed_helper_check_data();
  $current_user_id = get_current_user_id();
  $followers = get_user_meta( $current_user_id, 'following', true);
  if (is_array($followers) && !empty($followers)){
    unset($followers[$user_id]);
  } else {
    $followers = array();
  }
  update_user_meta( $current_user_id, 'following', $followers );
  echo mbt_news_feed_button($user_id, true);
  exit;
}
function mbt_news_feed_button($user_id, $follow=true) {
  $label = __('Follow','newsfeed');
  $class = 'follow';
  if (false === $follow) {
    $class = 'following';
    $label = __('Following','newsfeed');
  }
  return "<a href='#' class='button {$class}' data-user_id='{$user_id}'>{$label}</a>";
}
function mbt_news_feed_valid_actions() {
  return array(
    'mbt_following',
    'mbt_follow',
  );
}
function mbt_news_feed_wp_footer() {
  if (is_user_logged_in()) {
    $render_button = false;
    $user_id = 0;
    if (is_singular()) {
      $render_button = true;
      $post_id = get_queried_object_id();
      $user_id = get_post_field( 'post_author', $post_id );
    }
    if (is_author()) {
      $render_button = true;
      $user_id = get_queried_object_id();
    }
    if (true === $render_button && $user_id > 0) {
      $follow = mbt_news_feed_is_following($user_id );
      echo "<div id='mbt-news-feed'>";
        echo mbt_news_feed_button($user_id, !$follow);
      echo "</div>";
    }
  }
}
if (is_admin()){
  foreach (mbt_news_feed_valid_actions() as $action) {
    add_action('wp_ajax_'.$action, $action);
  }
}
add_action( 'init', 'mbt_news_feed_init');
add_action( 'pre_get_posts', 'mbt_news_feed_pre_get_posts');
add_action( 'wp_footer', 'mbt_news_feed_wp_footer');

C:\xampp\htdocs\style2\wp-content\themes\gutener\assets\js\newsfeed.js

C:\xampp\htdocs\style2\wp-content\themes\gutener\assets\css\newsfeed.css

Ví dụ 2: Sử dụng trên plugin

C:\xampp\htdocs\hanam\wp-content\plugins\mbtNewsFeed\newsfeed.php

C:\xampp\htdocs\hanam\wp-content\plugins\mbtNewsFeed\newsfeed.js

C:\xampp\htdocs\hanam\wp-content\plugins\mbtNewsFeed\newsfeed.css

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