<?php
/*
Plugin Name: Change Password POST Title
Plugin URI: http://blog.wolfs.jp/20160513-3616/
Description: パスワードで保護された記事のタイトルを変更します。
Version: 1.0.0
Author: Kerberos
Author URI: http://blog.wolfs.jp/
*/
 
class changePasswordPostTitle {
    private $plugin_dir = ABSPATH.'/wp-content/plugins/change_password_post_title/feed/';
    private $post_password_title = '[パスワードで保護された記事]';
 
    public function __construct() {
        add_filter('the_title', array($this, 'the_title'), 10, 2);
        add_filter('pre_get_document_title', array($this, 'pre_get_document_title'));
        add_filter('protected_title_format', array($this, 'protected_title_format'));
 
        add_filter('aioseop_title_single', array($this, 'aioseop_title'));
        add_filter('aioseop_title_page', array($this, 'aioseop_title'));
 
        remove_action('do_feed_rss2', 'do_feed_rss2');
        remove_action('do_feed_atom', 'do_feed_atom');
        add_action('do_feed_rss2', array($this, 'do_feed_rss2'), 10, 1);
        add_action('do_feed_atom', array($this, 'do_feed_atom'), 10, 1);
    }
 
 
    public function the_title($title = '', $currentID = 0) {
        global $post;
 
        if ($currentID !== 0) {
            if (post_password_required($currentID) === true) {
                if ($post->ID == $currentID && is_admin() === false) {
                    return $this->post_password_title;
                }
            }
 
            return $this->remove_title_prefix($title);
        }
 
        return $title;
    }
 
    public function pre_get_document_title($title) {
        if (is_single() === true || is_page() === true) {
            if (post_password_required($post->ID) === true) {
                return $this->post_password_title;
            }
 
            return $this->remove_title_prefix($title);
        }
 
        return $title;
    }
 
    public function protected_title_format($title) {
        global $post;
 
        if (post_password_required($post->ID) === false) {
            return '&#x1F512; %s';
        }
 
        return $this->post_password_title;
    }
 
    public function aioseop_title($title) {
        global $post;
 
        if (post_password_required($post->ID) === true) {
            return $this->post_password_title;
        }
 
        return $title;
    }
 
    private function remove_title_prefix($title) {
        $search[0] = '/^' . str_replace('%s', '(.*)', preg_quote(__('Protected: %s'), '/' )) . '$/';
        $search[1] = '/^' . str_replace('%s', '(.*)', preg_quote(__('Private: %s'), '/' )) . '$/';
 
        return preg_replace($search, '$1', $title);
    }
 
 
    public function do_feed_rss2($for_comments) {
        if ($for_comments) {
            load_template($this->plugin_dir.'feed-rss2-comments.php');
        }
    }
 
    public function do_feed_atom($for_comments) {
        if ($for_comments) {
            load_template($this->plugin_dir.'feed-atom-comments.php');
        }
    }
}
 
new changePasswordPostTitle();
?>