/**
 * Handles the front end edit topic submission
 *
 * @param string $action The requested action to compare this function to
 * @uses bbp_add_error() To add an error message
 * @uses bbp_get_topic() To get the topic
 * @uses bbp_verify_nonce_request() To verify the nonce and check the request
 * @uses bbp_is_topic_anonymous() To check if topic is by an anonymous user
 * @uses current_user_can() To check if the current user can edit the topic
 * @uses bbp_filter_anonymous_post_data() To filter anonymous data
 * @uses is_wp_error() To check if the value retrieved is a {@link WP_Error}
 * @uses esc_attr() For sanitization
 * @uses bbp_is_forum_category() To check if the forum is a category
 * @uses bbp_is_forum_closed() To check if the forum is closed
 * @uses bbp_is_forum_private() To check if the forum is private
 * @uses remove_filter() To remove kses filters if needed
 * @uses apply_filters() Calls 'bbp_edit_topic_pre_title' with the title and
 *                        topic id
 * @uses apply_filters() Calls 'bbp_edit_topic_pre_content' with the content
 *                        and topic id
 * @uses bbPress::errors::get_error_codes() To get the {@link WP_Error} errors
 * @uses wp_save_post_revision() To save a topic revision
 * @uses bbp_update_topic_revision_log() To update the topic revision log
 * @uses bbp_stick_topic() To stick or super stick the topic
 * @uses bbp_unstick_topic() To unstick the topic
 * @uses wp_update_post() To update the topic
 * @uses do_action() Calls 'bbp_edit_topic' with the topic id, forum id,
 *                    anonymous data and reply author
 * @uses bbp_move_topic_handler() To handle movement of a topic from one forum
 *                                 to another
 * @uses bbp_get_topic_permalink() To get the topic permalink
 * @uses wp_safe_redirect() To redirect to the topic link
 * @uses bbPress::errors::get_error_messages() To get the {@link WP_Error} error
 *                                              messages
 */
function bbp_edit_topic_handler($action = '')
{
    // Bail if action is not bbp-edit-topic
    if ('bbp-edit-topic' !== $action) {
        return;
    }
    // Define local variable(s)
    $revisions_removed = false;
    $topic = $topic_id = $topic_author = $forum_id = $anonymous_data = 0;
    $topic_title = $topic_content = $topic_edit_reason = '';
    /** Topic *****************************************************************/
    // Topic id was not passed
    if (empty($_POST['bbp_topic_id'])) {
        bbp_add_error('bbp_edit_topic_id', __('<strong>ERROR</strong>: Topic ID not found.', 'bbpress'));
        return;
        // Topic id was passed
    } elseif (is_numeric($_POST['bbp_topic_id'])) {
        $topic_id = (int) $_POST['bbp_topic_id'];
        $topic = bbp_get_topic($topic_id);
    }
    // Topic does not exist
    if (empty($topic)) {
        bbp_add_error('bbp_edit_topic_not_found', __('<strong>ERROR</strong>: The topic you want to edit was not found.', 'bbpress'));
        return;
        // Topic exists
    } else {
        // Check users ability to create new topic
        if (!bbp_is_topic_anonymous($topic_id)) {
            // User cannot edit this topic
            if (!current_user_can('edit_topic', $topic_id)) {
                bbp_add_error('bbp_edit_topic_permissions', __('<strong>ERROR</strong>: You do not have permission to edit that topic.', 'bbpress'));
            }
            // Set topic author
            $topic_author = bbp_get_topic_author_id($topic_id);
            // It is an anonymous post
        } else {
            // Filter anonymous data
            $anonymous_data = bbp_filter_anonymous_post_data(array(), true);
        }
    }
    // Nonce check
    if (!bbp_verify_nonce_request('bbp-edit-topic_' . $topic_id)) {
        bbp_add_error('bbp_edit_topic_nonce', __('<strong>ERROR</strong>: Are you sure you wanted to do that?', 'bbpress'));
        return;
    }
    // Remove kses filters from title and content for capable users and if the nonce is verified
    if (current_user_can('unfiltered_html') && !empty($_POST['_bbp_unfiltered_html_topic']) && wp_create_nonce('bbp-unfiltered-html-topic_' . $topic_id) === $_POST['_bbp_unfiltered_html_topic']) {
        remove_filter('bbp_edit_topic_pre_title', 'wp_filter_kses');
        remove_filter('bbp_edit_topic_pre_content', 'bbp_encode_bad', 10);
        remove_filter('bbp_edit_topic_pre_content', 'bbp_filter_kses', 30);
    }
    /** Topic Forum ***********************************************************/
    // Forum id was not passed
    if (empty($_POST['bbp_forum_id'])) {
        bbp_add_error('bbp_topic_forum_id', __('<strong>ERROR</strong>: Forum ID is missing.', 'bbpress'));
        // Forum id was passed
    } elseif (is_numeric($_POST['bbp_forum_id'])) {
        $forum_id = (int) $_POST['bbp_forum_id'];
    }
    // Current forum this topic is in
    $current_forum_id = bbp_get_topic_forum_id($topic_id);
    // Forum exists
    if (!empty($forum_id) && $forum_id !== $current_forum_id) {
        // Forum is a category
        if (bbp_is_forum_category($forum_id)) {
//.........这里部分代码省略.........

 /**
  * Pass the reply attributes for processing
  *
  * @since 2.0.0 bbPress (r2746)
  *
  * @param int $reply_id Reply id
  * @uses current_user_can() To check if the current user is capable of
  *                           editing the reply
  * @uses do_action() Calls 'bbp_reply_attributes_metabox_save' with the
  *                    reply id and parent id
  * @return int Parent id
  */
 public function attributes_metabox_save($reply_id)
 {
     if ($this->bail()) {
         return $reply_id;
     }
     // Bail if doing an autosave
     if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
         return $reply_id;
     }
     // Bail if not a post request
     if (!bbp_is_post_request()) {
         return $reply_id;
     }
     // Check action exists
     if (empty($_POST['action'])) {
         return $reply_id;
     }
     // Nonce check
     if (empty($_POST['bbp_reply_metabox']) || !wp_verify_nonce($_POST['bbp_reply_metabox'], 'bbp_reply_metabox_save')) {
         return $reply_id;
     }
     // Current user cannot edit this reply
     if (!current_user_can('edit_reply', $reply_id)) {
         return $reply_id;
     }
     // Get the reply meta post values
     $topic_id = !empty($_POST['parent_id']) ? (int) $_POST['parent_id'] : 0;
     $forum_id = !empty($_POST['bbp_forum_id']) ? (int) $_POST['bbp_forum_id'] : bbp_get_topic_forum_id($topic_id);
     $reply_to = !empty($_POST['bbp_reply_to']) ? (int) $_POST['bbp_reply_to'] : 0;
     // Get reply author data
     $anonymous_data = bbp_filter_anonymous_post_data();
     $author_id = bbp_get_reply_author_id($reply_id);
     $is_edit = isset($_POST['hidden_post_status']) && $_POST['hidden_post_status'] !== 'draft';
     // Formally update the reply
     bbp_update_reply($reply_id, $topic_id, $forum_id, $anonymous_data, $author_id, $is_edit, $reply_to);
     // Allow other fun things to happen
     do_action('bbp_reply_attributes_metabox_save', $reply_id, $topic_id, $forum_id, $reply_to);
     do_action('bbp_author_metabox_save', $reply_id, $anonymous_data);
     return $reply_id;
 }

/**
 * Handles the front end edit reply submission
 *
 * @param string $action The requested action to compare this function to
 * @uses bbp_add_error() To add an error message
 * @uses bbp_get_reply() To get the reply
 * @uses bbp_verify_nonce_request() To verify the nonce and check the request
 * @uses bbp_is_reply_anonymous() To check if the reply was by an anonymous user
 * @uses current_user_can() To check if the current user can edit that reply
 * @uses bbp_filter_anonymous_post_data() To filter anonymous data
 * @uses is_wp_error() To check if the value retrieved is a {@link WP_Error}
 * @uses remove_filter() To remove kses filters if needed
 * @uses esc_attr() For sanitization
 * @uses apply_filters() Calls 'bbp_edit_reply_pre_title' with the title and
 *                       reply id
 * @uses apply_filters() Calls 'bbp_edit_reply_pre_content' with the content
 *                        reply id
 * @uses wp_set_post_terms() To set the topic tags
 * @uses bbp_has_errors() To get the {@link WP_Error} errors
 * @uses wp_save_post_revision() To save a reply revision
 * @uses bbp_update_reply_revision_log() To update the reply revision log
 * @uses wp_update_post() To update the reply
 * @uses bbp_get_reply_topic_id() To get the reply topic id
 * @uses bbp_get_topic_forum_id() To get the topic forum id
 * @uses bbp_get_reply_to() To get the reply to id
 * @uses do_action() Calls 'bbp_edit_reply' with the reply id, topic id, forum
 *                    id, anonymous data, reply author, bool true (for edit),
 *                    and the reply to id
 * @uses bbp_get_reply_url() To get the paginated url to the reply
 * @uses wp_safe_redirect() To redirect to the reply url
 * @uses bbPress::errors::get_error_message() To get the {@link WP_Error} error
 *                                             message
 */
function bbp_edit_reply_handler($action = '')
{
    // Bail if action is not bbp-edit-reply
    if ('bbp-edit-reply' !== $action) {
        return;
    }
    // Define local variable(s)
    $revisions_removed = false;
    $reply = $reply_id = $reply_author = $topic_id = $forum_id = $anonymous_data = 0;
    $reply_title = $reply_content = $reply_edit_reason = $terms = '';
    /** Reply *****************************************************************/
    // Reply id was not passed
    if (empty($_POST['bbp_reply_id'])) {
        bbp_add_error('bbp_edit_reply_id', __('<strong>ERROR</strong>: Reply ID not found.', 'bbpress'));
        return;
        // Reply id was passed
    } elseif (is_numeric($_POST['bbp_reply_id'])) {
        $reply_id = (int) $_POST['bbp_reply_id'];
        $reply = bbp_get_reply($reply_id);
    }
    // Nonce check
    if (!bbp_verify_nonce_request('bbp-edit-reply_' . $reply_id)) {
        bbp_add_error('bbp_edit_reply_nonce', __('<strong>ERROR</strong>: Are you sure you wanted to do that?', 'bbpress'));
        return;
    }
    // Reply does not exist
    if (empty($reply)) {
        bbp_add_error('bbp_edit_reply_not_found', __('<strong>ERROR</strong>: The reply you want to edit was not found.', 'bbpress'));
        return;
        // Reply exists
    } else {
        // Check users ability to create new reply
        if (!bbp_is_reply_anonymous($reply_id)) {
            // User cannot edit this reply
            if (!current_user_can('edit_reply', $reply_id)) {
                bbp_add_error('bbp_edit_reply_permissions', __('<strong>ERROR</strong>: You do not have permission to edit that reply.', 'bbpress'));
                return;
            }
            // Set reply author
            $reply_author = bbp_get_reply_author_id($reply_id);
            // It is an anonymous post
        } else {
            // Filter anonymous data
            $anonymous_data = bbp_filter_anonymous_post_data();
        }
    }
    // Remove kses filters from title and content for capable users and if the nonce is verified
    if (current_user_can('unfiltered_html') && !empty($_POST['_bbp_unfiltered_html_reply']) && wp_create_nonce('bbp-unfiltered-html-reply_' . $reply_id) === $_POST['_bbp_unfiltered_html_reply']) {
        remove_filter('bbp_edit_reply_pre_title', 'wp_filter_kses');
        remove_filter('bbp_edit_reply_pre_content', 'bbp_encode_bad', 10);
        remove_filter('bbp_edit_reply_pre_content', 'bbp_filter_kses', 30);
    }
    /** Reply Topic ***********************************************************/
    $topic_id = bbp_get_reply_topic_id($reply_id);
    /** Topic Forum ***********************************************************/
    $forum_id = bbp_get_topic_forum_id($topic_id);
    // Forum exists
    if (!empty($forum_id) && $forum_id !== bbp_get_reply_forum_id($reply_id)) {
        // Forum is a category
        if (bbp_is_forum_category($forum_id)) {
            bbp_add_error('bbp_edit_reply_forum_category', __('<strong>ERROR</strong>: This forum is a category. No replies can be created in this forum.', 'bbpress'));
            // Forum is not a category
        } else {
            // Forum is closed and user cannot access
            if (bbp_is_forum_closed($forum_id) && !current_user_can('edit_forum', $forum_id)) {
                bbp_add_error('bbp_edit_reply_forum_closed', __('<strong>ERROR</strong>: This forum has been closed to new replies.', 'bbpress'));
            }
//.........这里部分代码省略.........

 /**
  * Pass the topic attributes for processing
  *
  * @since 2.0.0 bbPress (r2746)
  *
  * @param int $topic_id Topic id
  * @uses current_user_can() To check if the current user is capable of
  *                           editing the topic
  * @uses do_action() Calls 'bbp_topic_attributes_metabox_save' with the
  *                    topic id and parent id
  * @return int Parent id
  */
 public function attributes_metabox_save($topic_id)
 {
     if ($this->bail()) {
         return $topic_id;
     }
     // Bail if doing an autosave
     if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
         return $topic_id;
     }
     // Bail if not a post request
     if (!bbp_is_post_request()) {
         return $topic_id;
     }
     // Nonce check
     if (empty($_POST['bbp_topic_metabox']) || !wp_verify_nonce($_POST['bbp_topic_metabox'], 'bbp_topic_metabox_save')) {
         return $topic_id;
     }
     // Bail if current user cannot edit this topic
     if (!current_user_can('edit_topic', $topic_id)) {
         return $topic_id;
     }
     // Get the forum ID
     $forum_id = !empty($_POST['parent_id']) ? (int) $_POST['parent_id'] : 0;
     // Get topic author data
     $anonymous_data = bbp_filter_anonymous_post_data();
     $author_id = bbp_get_topic_author_id($topic_id);
     $is_edit = isset($_POST['hidden_post_status']) && $_POST['hidden_post_status'] !== 'draft';
     // Formally update the topic
     bbp_update_topic($topic_id, $forum_id, $anonymous_data, $author_id, $is_edit);
     // Stickies
     if (!empty($_POST['bbp_stick_topic']) && in_array($_POST['bbp_stick_topic'], array('stick', 'super', 'unstick'))) {
         // What's the haps?
         switch ($_POST['bbp_stick_topic']) {
             // Sticky in this forum
             case 'stick':
                 bbp_stick_topic($topic_id);
                 break;
                 // Super sticky in all forums
             // Super sticky in all forums
             case 'super':
                 bbp_stick_topic($topic_id, true);
                 break;
                 // Normal
             // Normal
             case 'unstick':
             default:
                 bbp_unstick_topic($topic_id);
                 break;
         }
     }
     // Allow other fun things to happen
     do_action('bbp_topic_attributes_metabox_save', $topic_id, $forum_id);
     do_action('bbp_author_metabox_save', $topic_id, $anonymous_data);
     return $topic_id;
 }

 /**
  * Update post meta after a spam check
  *
  * @since bbPress (r3308)
  *
  * @param int $post_id
  * @param object $_post
  *
  * @global object $this->last_post
  *
  * @uses get_post() To get the post object
  * @uses get_userdata() To get the user data
  * @uses bbp_filter_anonymous_user_data() To get anonymous user data
  * @uses update_post_meta() To update post meta with Akismet data
  * @uses BBP_Akismet::update_post_history() To update post Akismet history
  */
 public function update_post_meta($post_id = 0, $_post = false)
 {
     // Define local variable(s)
     $as_submitted = false;
     // Setup some variables
     $post_id = (int) $post_id;
     // Ensure we have a post object
     if (empty($_post)) {
         $_post = get_post($post_id);
     }
     // Set up Akismet last post data
     if (!empty($this->last_post)) {
         $as_submitted = $this->last_post['bbp_post_as_submitted'];
     }
     // wp_insert_post() might be called in other contexts. Ensure this is
     // the same topic/reply as was checked by BBP_Akismet::check_post()
     if (is_object($_post) && !empty($this->last_post) && is_array($as_submitted)) {
         // Get user data
         $userdata = get_userdata($_post->post_author);
         $anonymous_data = bbp_filter_anonymous_post_data();
         // More checks
         if (intval($as_submitted['comment_post_ID']) == intval($_post->post_parent) && $as_submitted['comment_author'] == ($anonymous_data ? $anonymous_data['bbp_anonymous_name'] : $userdata->display_name) && $as_submitted['comment_author_email'] == ($anonymous_data ? $anonymous_data['bbp_anonymous_email'] : $userdata->user_email)) {
             // Normal result: true
             if ($this->last_post['bbp_akismet_result'] == 'true') {
                 // Leave a trail so other's know what we did
                 update_post_meta($post_id, '_bbp_akismet_result', 'true');
                 $this->update_post_history($post_id, __('Akismet caught this post as spam', 'bbpress'), 'check-spam');
                 // If post_status isn't the spam status, as expected, leave a note
                 if ($_post->post_status != bbp_get_spam_status_id()) {
                     $this->update_post_history($post_id, sprintf(__('Post status was changed to %s', 'bbpress'), $_post->post_status), 'status-changed-' . $_post->post_status);
                 }
                 // Normal result: false
             } elseif ($this->last_post['bbp_akismet_result'] == 'false') {
                 // Leave a trail so other's know what we did
                 update_post_meta($post_id, '_bbp_akismet_result', 'false');
                 $this->update_post_history($post_id, __('Akismet cleared this post', 'bbpress'), 'check-ham');
                 // If post_status is the spam status, which isn't expected, leave a note
                 if ($_post->post_status == bbp_get_spam_status_id()) {
                     // @todo Use wp_blacklist_check()
                     $this->update_post_history($post_id, sprintf(__('Post status was changed to %s', 'bbpress'), $_post->post_status), 'status-changed-' . $_post->post_status);
                 }
                 // Abnormal result: error
             } else {
                 // Leave a trail so other's know what we did
                 update_post_meta($post_id, '_bbp_akismet_error', time());
                 $this->update_post_history($post_id, sprintf(__('Akismet was unable to check this post (response: %s), will automatically retry again later.', 'bbpress'), $this->last_post['bbp_akismet_result']), 'check-error');
             }
             // Record the complete original data as submitted for checking
             if (isset($this->last_post['bbp_post_as_submitted'])) {
                 update_post_meta($post_id, '_bbp_akismet_as_submitted', $this->last_post['bbp_post_as_submitted']);
             }
         }
     }
 }

 /**
  * Save the author information for the topic
  *
  * @since bbPress (r2828)
  *
  * @param int $post_id Topic or reply id
  * @uses bbp_get_topic() To get the topic
  * @uses bbp_get_reply() To get the reply
  * @uses current_user_can() To check if the current user can edit the
  *                           topic or reply
  * @uses bbp_filter_author_post_data() To filter the author data
  * @uses update_post_meta() To update the anonymous user data
  * @uses do_action() Calls 'bbp_author_metabox_save' with the topic id and
  *                    anonymous data
  * @return int Topic or reply id
  */
 public function author_metabox_save($post_id)
 {
     if ($this->bail()) {
         return $post_id;
     }
     // Bail if no post_id
     if (empty($post_id)) {
         return $post_id;
     }
     // Bail if doing an autosave
     if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
         return $post_id;
     }
     // Bail if not a post request
     if ('POST' != strtoupper($_SERVER['REQUEST_METHOD'])) {
         return $post_id;
     }
     // Bail if user cannot edit topics
     if (!current_user_can('edit_topic', $post_id)) {
         return $post_id;
     }
     $anonymous_data = bbp_filter_anonymous_post_data();
     update_post_meta($post_id, '_bbp_anonymous_name', $anonymous_data['bbp_anonymous_name']);
     update_post_meta($post_id, '_bbp_anonymous_email', $anonymous_data['bbp_anonymous_email']);
     update_post_meta($post_id, '_bbp_anonymous_website', $anonymous_data['bbp_anonymous_website']);
     do_action('bbp_author_metabox_save', $post_id, $anonymous_data);
     return $post_id;
 }

 /**
  * Pass the topic attributes for processing
  *
  * @since 2.0.0 bbPress (r2746)
  *
  * @param int $topic_id Topic id
  * @uses current_user_can() To check if the current user is capable of
  *                           editing the topic
  * @uses do_action() Calls 'bbp_topic_attributes_metabox_save' with the
  *                    topic id and parent id
  * @return int Parent id
  */
 public function save_meta_boxes($topic_id)
 {
     if ($this->bail()) {
         return $topic_id;
     }
     // Bail if doing an autosave
     if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
         return $topic_id;
     }
     // Bail if not a post request
     if (!bbp_is_post_request()) {
         return $topic_id;
     }
     // Nonce check
     if (empty($_POST['bbp_topic_metabox']) || !wp_verify_nonce($_POST['bbp_topic_metabox'], 'bbp_topic_metabox_save')) {
         return $topic_id;
     }
     // Bail if current user cannot edit this topic
     if (!current_user_can('edit_topic', $topic_id)) {
         return $topic_id;
     }
     // Get the forum ID
     $forum_id = !empty($_POST['parent_id']) ? (int) $_POST['parent_id'] : 0;
     // Get topic author data
     $anonymous_data = bbp_filter_anonymous_post_data();
     $author_id = bbp_get_topic_author_id($topic_id);
     $is_edit = isset($_POST['hidden_post_status']) && $_POST['hidden_post_status'] !== 'draft';
     // Formally update the topic
     bbp_update_topic($topic_id, $forum_id, $anonymous_data, $author_id, $is_edit);
     // Allow other fun things to happen
     do_action('bbp_topic_attributes_metabox_save', $topic_id, $forum_id);
     do_action('bbp_author_metabox_save', $topic_id, $anonymous_data);
     return $topic_id;
 }