* @copyright Copyright (c) 2010 - 2014, Justin Tadlock * @link http://themehybrid.com/plugins/entry-views * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html */ /** * Plugin loader class. * * @since 1.0.0 */ final class Entry_Views_Plugin { /** * Holds the instances of this class. * * @since 1.0.0 * @access private * @var object */ private static $instance; /** * The post ID to update the entry views for. * * @since 1.0.0 * @access public * @var int */ public $post_id = 0; /** * Sets up needed actions/filters for the plugin to initialize. * * @since 1.0.0 * @access public * @return void */ public function __construct() { add_action( 'plugins_loaded', array( $this, 'i18n' ), 2 ); add_action( 'plugins_loaded', array( $this, 'includes' ), 3 ); add_action( 'init', array( $this, 'post_type_support' ), 10 ); add_action( 'widgets_init', array( $this, 'register_widgets' ), 10 ); add_action( 'template_redirect', array( $this, 'load' ), 99 ); add_action( 'wp_ajax_entry_views', array( $this, 'update_ajax' ), 10 ); add_action( 'wp_ajax_nopriv_entry_views', array( $this, 'update_ajax' ), 10 ); } /** * Loads the translation files. * * @since 1.0.0 * @access public * @return void */ function i18n() { load_plugin_textdomain( 'entry-views', false, 'entry-views/languages' ); } /** * Loads the initial files needed by the plugin. * * @since 1.0.0 * @access public * @return void */ function includes() { $path = trailingslashit( plugin_dir_path( __FILE__ ) ); require_once( "{$path}inc/functions.php" ); require_once( "{$path}inc/template.php" ); require_once( "{$path}inc/shortcodes.php" ); require_once( "{$path}inc/widget-entry-views.php" ); } /** * Adds support for 'entry-views' to the 'post', 'page', and 'attachment' post types (default WordPress * post types). For all other post types, the theme should explicitly register support for this feature. * * @since 1.0.0 * @access public * @return void */ function post_type_support() { /* Core post types. */ add_post_type_support( 'post', array( 'entry-views' ) ); add_post_type_support( 'page', array( 'entry-views' ) ); add_post_type_support( 'attachment', array( 'entry-views' ) ); /* Plugin post types. */ add_post_type_support( 'literature', array( 'entry-views' ) ); add_post_type_support( 'portfolio_item', array( 'entry-views' ) ); add_post_type_support( 'recipe', array( 'entry-views' ) ); add_post_type_support( 'restaurant_item', array( 'entry-views' ) ); } /** * Registers the plugin's widgets. * * @since 1.0.0 * @access public * @return void */ public function register_widgets() { register_widget( 'EV_Widget_Entry_Views' ); } /** * Checks if we're on a singular post view and if the current post type supports the 'entry-views' * extension. If so, set the $post_id variable and load the needed JavaScript. * * @since 1.0.0 * @access public * @return void */ function load() { /* Check if we're on a singular post view. */ if ( is_singular() && !is_preview() ) { /* Get the post object. */ $post = get_queried_object(); /* Check if the post type supports the 'entry-views' feature. */ if ( post_type_supports( $post->post_type, 'entry-views' ) ) { /* Set the post ID for later use because we wouldn't want a custom query to change this. */ $this->post_id = get_queried_object_id(); /* Enqueue the jQuery library. */ wp_enqueue_script( 'jquery' ); /* Load the entry views JavaScript in the footer. */ add_action( 'wp_footer', array( $this, 'load_scripts' ) ); } } } /** * Callback function hooked to 'wp_ajax_entry_views' and 'wp_ajax_nopriv_entry_views'. It checks the * AJAX nonce and passes the given $post_id to the entry views update function. * * @since 1.0.0 * @access public * @return void */ function update_ajax() { /* Check the AJAX nonce to make sure this is a valid request. */ check_ajax_referer( 'entry_views_ajax' ); /* If the post ID is set, set it to the $post_id variable and make sure it's an integer. */ if ( isset( $_POST['post_id'] ) ) $post_id = absint( $_POST['post_id'] ); /* If $post_id isn't empty, pass it to the ev_set_post_view_count() function to update the view count. */ if ( !empty( $post_id ) ) ev_set_post_view_count( $post_id ); } /** * Displays a small script that sends an AJAX request for the page. It passes the $post_id to the AJAX * callback function for updating the meta. * * @since 1.0.0 * @access public * @return void */ function load_scripts() { /* Create a nonce for the AJAX request. */ $nonce = wp_create_nonce( 'entry_views_ajax' ); /* Display the JavaScript needed. */ echo '' . "\n"; } /** * Returns the instance. * * @since 1.0.0 * @access public * @return object */ public static function get_instance() { if ( !self::$instance ) self::$instance = new self; return self::$instance; } } Entry_Views_Plugin::get_instance();