BP_Members_Admin::users_table_process_bulk_type_change()

	public function users_table_process_bulk_type_change() {
		// Output the admin notice.
		$this->users_type_change_notice();

		// Flag for custom error message.
		$bp_error_message = false;

		// Bail if no users are specified or if this isn't a BuddyPress action.
		if ( empty( $_REQUEST['users'] )
			|| ( empty( $_REQUEST['bp_change_type'] ) && empty( $_REQUEST['bp_change_type2'] ) )
			|| empty( $_REQUEST['bp_change_member_type'] )
		) {
			return;
		}

		// Bail if nonce check fails.
		check_admin_referer( 'bp-bulk-users-change-type-' . bp_loggedin_user_id(), 'bp-bulk-users-change-type-nonce' );

		// Bail if current user cannot promote users.
		if ( ! bp_current_user_can( 'promote_users' ) ) {
			return;
		}

		$new_type = '';
		if ( ! empty( $_REQUEST['bp_change_type2'] ) ) {
			$new_type = sanitize_text_field( $_REQUEST['bp_change_type2'] );
		} elseif ( ! empty( $_REQUEST['bp_change_type'] ) ) {
			$new_type = sanitize_text_field( $_REQUEST['bp_change_type'] );
		}

		// Check that the selected type actually exists.
		if ( 'remove_member_type' != $new_type && null === bp_get_member_type_object( $new_type ) ) {
			$error = true;
		} else {
			// Run through user ids.
			$error = false;
			foreach ( (array) $_REQUEST['users'] as $user_id ) {
				$user_id = (int) $user_id;

				// Get the old profile type to check against.
				$member_type = bp_get_member_type( $user_id );

				if ( 'remove_member_type' === $new_type ) {
					// Remove the current profile type, if there's one to remove.
					if ( $member_type ) {
						$removed = bp_remove_member_type( $user_id, $member_type );
						if ( false === $removed || is_wp_error( $removed ) ) {
							$error = true;
						}
					}
				} else {

					if ( $user_id === get_current_user_id() ) {

						// Set the new profile type.
						if ( $new_type !== $member_type ) {

							// Get post id of selected profile type.
							$post_id = bp_member_type_post_by_type( $new_type );

							// Get selected profile type role.
							$selected_member_type_wp_roles = get_post_meta( $post_id, '_bp_member_type_wp_roles', true );
							if ( empty( $selected_member_type_wp_roles ) ) {
								$set = bp_set_member_type( $user_id, $new_type );
								if ( false === $set || is_wp_error( $set ) ) {
									$error = true;
								}
							} else {
								if ( 'administrator' !== $selected_member_type_wp_roles[0] ) {
									$bp_error_message = true;
									$error = true;
								} else {
									$set = bp_set_member_type( $user_id, $new_type );
									if ( false === $set || is_wp_error( $set ) ) {
										$error = true;
									}
								}
							}
						}
					} else {

						// Set the new profile type.
						if ( $new_type !== $member_type ) {
							$set = bp_set_member_type( $user_id, $new_type );
							if ( false === $set || is_wp_error( $set ) ) {
								$error = true;
							}
						}
					}
				}
			}
		}

		// If there were any errors, show the error message.
		if ( $error ) {

			if ( true === $bp_error_message ) {
				$redirect = add_query_arg( array( 'updated' => 'member-type-change-owner-error' ), wp_get_referer() );
			} else {
				$redirect = add_query_arg( array( 'updated' => 'member-type-change-error' ), wp_get_referer() );
			}

		} else {
			$redirect = add_query_arg( array( 'updated' => 'member-type-change-success' ), wp_get_referer() );
		}

		wp_redirect( $redirect );
		exit();
	}