bbp_edit_reply_handler( string $action = '' )

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.', 'buddyboss' ) );
		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?', 'buddyboss' ) );
		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.', 'buddyboss' ) );
		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.', 'buddyboss' ) );
				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.', 'buddyboss' ) );

		// 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.', 'buddyboss' ) );
			}

			// Forum is private and user cannot access
			if ( bbp_is_forum_private( $forum_id ) ) {
				if ( !current_user_can( 'read_private_forums' ) ) {
					bbp_add_error( 'bbp_edit_reply_forum_private', __( '<strong>ERROR</strong>: This forum is private and you do not have the capability to read or create new replies in it.', 'buddyboss' ) );
				}

			// Forum is hidden and user cannot access
			} elseif ( bbp_is_forum_hidden( $forum_id ) ) {
				if ( !current_user_can( 'read_hidden_forums' ) ) {
					bbp_add_error( 'bbp_edit_reply_forum_hidden', __( '<strong>ERROR</strong>: This forum is hidden and you do not have the capability to read or create new replies in it.', 'buddyboss' ) );
				}
			}
		}
	}

	/** Reply Title ***********************************************************/

	if ( !empty( $_POST['bbp_reply_title'] ) )
		$reply_title = esc_attr( strip_tags( $_POST['bbp_reply_title'] ) );

	// Filter and sanitize
	$reply_title = apply_filters( 'bbp_edit_reply_pre_title', $reply_title, $reply_id );

	/** Reply Content *********************************************************/

	if ( !empty( $_POST['bbp_reply_content'] ) )
		$reply_content = $_POST['bbp_reply_content'];

	// Filter and sanitize
	$reply_content = apply_filters( 'bbp_edit_reply_pre_content', $reply_content, $reply_id );

	// No reply content
	if ( empty( $reply_content ) )
		bbp_add_error( 'bbp_edit_reply_content', __( '<strong>ERROR</strong>: Your reply cannot be empty.', 'buddyboss' ) );

	/** Reply Blacklist *******************************************************/

	if ( !bbp_check_for_blacklist( $anonymous_data, $reply_author, $reply_title, $reply_content ) )
		bbp_add_error( 'bbp_reply_blacklist', __( '<strong>ERROR</strong>: Your reply cannot be edited at this time.', 'buddyboss' ) );

	/** Reply Status **********************************************************/

	// Maybe put into moderation
	if ( !bbp_check_for_moderation( $anonymous_data, $reply_author, $reply_title, $reply_content ) ) {

		// Set post status to pending if public
		if ( bbp_get_public_status_id() === $reply->post_status ) {
			$reply_status = bbp_get_pending_status_id();
		}

	// Use existing post_status
	} else {
		$reply_status = $reply->post_status;
	}

	/** Reply To **************************************************************/

	// Handle Reply To of the reply; $_REQUEST for non-JS submissions
	if ( isset( $_REQUEST['bbp_reply_to'] ) ) {
		$reply_to = bbp_validate_reply_to( $_REQUEST['bbp_reply_to'] );
	}

	/** Topic Tags ************************************************************/

	// Either replace terms
	if ( bbp_allow_topic_tags() && current_user_can( 'assign_topic_tags' ) && ! empty( $_POST['bbp_topic_tags'] ) ) {
		$terms = esc_attr( strip_tags( $_POST['bbp_topic_tags'] ) );

	// ...or remove them.
	} elseif ( isset( $_POST['bbp_topic_tags'] ) ) {
		$terms = '';

	// Existing terms
	} else {
		$terms = bbp_get_topic_tag_names( $topic_id );
	}

	/** Additional Actions (Before Save) **************************************/

	do_action( 'bbp_edit_reply_pre_extras', $reply_id );

	// Bail if errors
	if ( bbp_has_errors() )
		return;

	/** No Errors *************************************************************/

	// Add the content of the form to $reply_data as an array
	// Just in time manipulation of reply data before being edited
	$reply_data = apply_filters( 'bbp_edit_reply_pre_insert', array(
		'ID'           => $reply_id,
		'post_title'   => $reply_title,
		'post_content' => $reply_content,
		'post_status'  => $reply_status,
		'post_parent'  => $topic_id,
		'post_author'  => $reply_author,
		'post_type'    => bbp_get_reply_post_type()
	) );

	// Toggle revisions to avoid duplicates
	if ( post_type_supports( bbp_get_reply_post_type(), 'revisions' ) ) {
		$revisions_removed = true;
		remove_post_type_support( bbp_get_reply_post_type(), 'revisions' );
	}

	// Insert topic
	$reply_id = wp_update_post( $reply_data );

	// Toggle revisions back on
	if ( true === $revisions_removed ) {
		$revisions_removed = false;
		add_post_type_support( bbp_get_reply_post_type(), 'revisions' );
	}

	/** Topic Tags ************************************************************/

	// Just in time manipulation of reply terms before being edited
	$terms = apply_filters( 'bbp_edit_reply_pre_set_terms', $terms, $topic_id, $reply_id );

	// Insert terms
	$terms = wp_set_post_terms( $topic_id, $terms, bbp_get_topic_tag_tax_id(), false );

	// Term error
	if ( is_wp_error( $terms ) ) {
		bbp_add_error( 'bbp_reply_tags', __( '<strong>ERROR</strong>: There was a problem adding the tags to the topic.', 'buddyboss' ) );
	}

	/** Revisions *************************************************************/

	// Revision Reason
	if ( !empty( $_POST['bbp_reply_edit_reason'] ) )
		$reply_edit_reason = esc_attr( strip_tags( $_POST['bbp_reply_edit_reason'] ) );

	// Update revision log
	if ( !empty( $_POST['bbp_log_reply_edit'] ) && ( "1" === $_POST['bbp_log_reply_edit'] ) ) {
		$revision_id = wp_save_post_revision( $reply_id );
		if ( !empty( $revision_id ) ) {
			bbp_update_reply_revision_log( array(
				'reply_id'    => $reply_id,
				'revision_id' => $revision_id,
				'author_id'   => bbp_get_current_user_id(),
				'reason'      => $reply_edit_reason
			) );
		}
	}

	/** No Errors *************************************************************/

	if ( !empty( $reply_id ) && !is_wp_error( $reply_id ) ) {

		// Update counts, etc...
		do_action( 'bbp_edit_reply', $reply_id, $topic_id, $forum_id, $anonymous_data, $reply_author , true, $reply_to );

		/** Additional Actions (After Save) ***********************************/

		do_action( 'bbp_edit_reply_post_extras', $reply_id );

		/** Redirect **********************************************************/

		// Redirect to
		$redirect_to = bbp_get_redirect_to();

		// Get the reply URL
		$reply_url = bbp_get_reply_url( $reply_id, $redirect_to );

		// Allow to be filtered
		$reply_url = apply_filters( 'bbp_edit_reply_redirect_to', $reply_url, $redirect_to );

		/** Successful Edit ***************************************************/

		// Redirect back to new reply
		wp_safe_redirect( $reply_url );

		// For good measure
		exit();

	/** Errors ****************************************************************/

	} else {
		$append_error = ( is_wp_error( $reply_id ) && $reply_id->get_error_message() ) ? $reply_id->get_error_message() . ' ' : '';
		bbp_add_error( 'bbp_reply_error', __( '<strong>ERROR</strong>: The following problem(s) have been found with your reply:' . $append_error . 'Please try again.', 'buddyboss' ) );
	}
}