'string',
			'default'     => 'desc',
			'enum'        => array(
				'asc',
				'desc',
			),
		);

		$query_params['orderby'] = array(
			'description' => __( 'Sort collection by comment attribute.' ),
			'type'        => 'string',
			'default'     => 'date_gmt',
			'enum'        => array(
				'date',
				'date_gmt',
				'id',
				'include',
				'post',
				'parent',
				'type',
			),
		);

		$query_params['parent'] = array(
			'default'     => array(),
			'description' => __( 'Limit result set to comments of specific parent IDs.' ),
			'type'        => 'array',
			'items'       => array(
				'type' => 'integer',
			),
		);

		$query_params['parent_exclude'] = array(
			'default'     => array(),
			'description' => __( 'Ensure result set excludes specific parent IDs.' ),
			'type'        => 'array',
			'items'       => array(
				'type' => 'integer',
			),
		);

		$query_params['post'] = array(
			'default'     => array(),
			'description' => __( 'Limit result set to comments assigned to specific post IDs.' ),
			'type'        => 'array',
			'items'       => array(
				'type' => 'integer',
			),
		);

		$query_params['status'] = array(
			'default'           => 'approve',
			'description'       => __( 'Limit result set to comments assigned a specific status. Requires authorization.' ),
			'sanitize_callback' => 'sanitize_key',
			'type'              => 'string',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$query_params['type'] = array(
			'default'           => 'comment',
			'description'       => __( 'Limit result set to comments assigned a specific type. Requires authorization.' ),
			'sanitize_callback' => 'sanitize_key',
			'type'              => 'string',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$query_params['password'] = array(
			'description' => __( 'The password for the post if it is password protected.' ),
			'type'        => 'string',
		);

		/**
		 * Filters REST API collection parameters for the comments controller.
		 *
		 * This filter registers the collection parameter, but does not map the
		 * collection parameter to an internal WP_Comment_Query parameter. Use the
		 * `rest_comment_query` filter to set WP_Comment_Query parameters.
		 *
		 * @since 4.7.0
		 *
		 * @param array $query_params JSON Schema-formatted collection parameters.
		 */
		return apply_filters( 'rest_comment_collection_params', $query_params );
	}

	/**
	 * Sets the comment_status of a given comment object when creating or updating a comment.
	 *
	 * @since 4.7.0
	 *
	 * @param string|int $new_status New comment status.
	 * @param int        $comment_id Comment ID.
	 * @return bool Whether the status was changed.
	 */
	protected function handle_status_param( $new_status, $comment_id ) {
		$old_status = wp_get_comment_status( $comment_id );

		if ( $new_status === $old_status ) {
			return false;
		}

		switch ( $new_status ) {
			case 'approved':
			case 'approve':
			case '1':
				$changed = wp_set_comment_status( $comment_id, 'approve' );
				break;
			case 'hold':
			case '0':
				$changed = wp_set_comment_status( $comment_id, 'hold' );
				break;
			case 'spam':
				$changed = wp_spam_comment( $comment_id );
				break;
			case 'unspam':
				$changed = wp_unspam_comment( $comment_id );
				break;
			case 'trash':
				$changed = wp_trash_comment( $comment_id );
				break;
			case 'untrash':
				$changed = wp_untrash_comment( $comment_id );
				break;
			default:
				$changed = false;
				break;
		}

		return $changed;
	}

	/**
	 * Checks if the post can be read.
	 *
	 * Correctly handles posts with the inherit status.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post         $post    Post object.
	 * @param WP_REST_Request $request Request data to check.
	 * @return bool Whether post can be read.
	 */
	protected function check_read_post_permission( $post, $request ) {
		$post_type = get_post_type_object( $post->post_type );

		// Return false if custom post type doesn't exist
		if ( ! $post_type ) {
			return false;
		}

		$posts_controller = $post_type->get_rest_controller();

		/*
		 * Ensure the posts controller is specifically a WP_REST_Posts_Controller instance
		 * before using methods specific to that controller.
		 */
		if ( ! $posts_controller instanceof WP_REST_Posts_Controller ) {
			$posts_controller = new WP_REST_Posts_Controller( $post->post_type );
		}

		$has_password_filter = false;

		// Only check password if a specific post was queried for or a single comment
		$requested_post    = ! empty( $request['post'] ) && ( ! is_array( $request['post'] ) || 1 === count( $request['post'] ) );
		$requested_comment = ! empty( $request['id'] );
		if ( ( $requested_post || $requested_comment ) && $posts_controller->can_access_password_content( $post, $request ) ) {
			add_filter( 'post_password_required', '__return_false' );

			$has_password_filter = true;
		}

		if ( post_password_required( $post ) ) {
			$result = current_user_can( 'edit_post', $post->ID );
		} else {
			$result = $posts_controller->check_read_permission( $post );
		}

		if ( $has_password_filter ) {
			remove_filter( 'post_password_required', '__return_false' );
		}

		return $result;
	}

	/**
	 * Checks if the comment can be read.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Comment      $comment Comment object.
	 * @param WP_REST_Request $request Request data to check.
	 * @return bool Whether the comment can be read.
	 */
	protected function check_read_permission( $comment, $request ) {
		if ( ! empty( $comment->comment_post_ID ) ) {
			$post = get_post( $comment->comment_post_ID );
			if ( $post ) {
				if ( $this->check_read_post_permission( $post, $request ) && 1 === (int) $comment->comment_approved ) {
					return true;
				}
			}
		}

		if ( 0 === get_current_user_id() ) {
			return false;
		}

		if ( empty( $comment->comment_post_ID ) && ! current_user_can( 'moderate_comments' ) ) {
			return false;
		}

		if ( ! empty( $comment->user_id ) && get_current_user_id() === (int) $comment->user_id ) {
			return true;
		}

		return current_user_can( 'edit_comment', $comment->comment_ID );
	}

	/**
	 * Checks if a comment can be edited or deleted.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Comment $comment Comment object.
	 * @return bool Whether the comment can be edited or deleted.
	 */
	protected function check_edit_permission( $comment ) {
		if ( 0 === (int) get_current_user_id() ) {
			return false;
		}

		if ( current_user_can( 'moderate_comments' ) ) {
			return true;
		}

		return current_user_can( 'edit_comment', $comment->comment_ID );
	}

	/**
	 * Checks a comment author email for validity.
	 *
	 * Accepts either a valid email address or empty string as a valid comment
	 * author email address. Setting the comment author email to an empty
	 * string is allowed when a comment is being updated.
	 *
	 * @since 4.7.0
	 *
	 * @param string          $value   Author email value submitted.
	 * @param WP_REST_Request $request Full details about the request.
	 * @param string          $param   The parameter name.
	 * @return string|WP_Error The sanitized email address, if valid,
	 *                         otherwise an error.
	 */
	public function check_comment_author_email( $value, $request, $param ) {
		$email = (string) $value;
		if ( empty( $email ) ) {
			return $email;
		}

		$check_email = rest_validate_request_arg( $email, $request, $param );
		if ( is_wp_error( $check_email ) ) {
			return $check_email;
		}

		return $email;
	}

	/**
	 * If empty comments are not allowed, checks if the provided comment content is not empty.
	 *
	 * @since 5.6.0
	 *
	 * @param array $prepared_comment The prepared comment data.
	 * @return bool True if the content is allowed, false otherwise.
	 */
	protected function check_is_comment_content_allowed( $prepared_comment ) {
		$check = wp_parse_args(
			$prepared_comment,
			array(
				'comment_post_ID'      => 0,
				'comment_author'       => null,
				'comment_author_email' => null,
				'comment_author_url'   => null,
				'comment_parent'       => 0,
				'user_id'              => 0,
			)
		);

		/** This filter is documented in wp-includes/comment.php */
		$allow_empty = apply_filters( 'allow_empty_comment', false, $check );

		if ( $allow_empty ) {
			return true;
		}

		/*
		 * Do not allow a comment to be created with missing or empty
		 * comment_content. See wp_handle_comment_submission().
		 */
		return '' !== $check['comment_content'];
	}
}