				use lazy_static::lazy_static;
				use regex::Regex;
				use std::path::PathBuf;

				lazy_static! {
				static ref BACKUP_DATA_FILE_REGEX: Regex = Regex::new(
				r"^backup-(?<backup_id>[^-])(?:-log-(?<log_id>\d))?(?<additional_data>-userkeys\|-attachments)?$"
				)
				.expect("Regex compilation failed");
				}

				#[derive(Debug)]
				pub struct BackupFileInfo {
				pub backup_id: String,
				pub log_id: Option<usize>,
				pub additional_data: Option<String>,
				}

				impl TryFrom<PathBuf> for BackupFileInfo {
				type Error = ();

				fn try_from(value: PathBuf) -> Result<Self, Self::Error> {
				let Some(file_name) = value.file_name() else {
				return Err(());
				};
				let file_name = file_name.to_string_lossy();

				let Some(captures) = BACKUP_DATA_FILE_REGEX.captures(&file_name) else {
				return Err(());
				};

				let Some(backup_id) = captures
				.name("backup_id")
				.map(\|re_match\| re_match.as_str().to_string())
				else {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'backup_id' from backup filename: {file_name:?}"
				);
				return Err(());
				};

				let log_id = match captures
				.name("log_id")
				.map(\|re_match\| re_match.as_str().parse::<usize>())
				{
				None => None,
				Some(Ok(log_id)) => Some(log_id),
				Some(Err(err)) => {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'log_id' from backup filename: {file_name:?}. \
				Error: {err:?}"
				);
				return Err(());
				}
				};

				let additional_data = captures
				.name("additional_data")
				.map(\|m\| m.as_str().to_string());

				Ok(Self {
				backup_id,
				log_id,
				additional_data,
				})
				}
				}

keyserver/src/responders/report-responders.js

				use lazy_static::lazy_static;
				use regex::Regex;
				use std::path::PathBuf;

				lazy_static! {
				static ref BACKUP_DATA_FILE_REGEX: Regex = Regex::new(
				r"^backup-(?<backup_id>[^-])(?:-log-(?<log_id>\d))?(?<additional_data>-userkeys\|-attachments)?$"
				)
				.expect("Regex compilation failed");
				}

				#[derive(Debug)]
				pub struct BackupFileInfo {
				pub backup_id: String,
				pub log_id: Option<usize>,
				pub additional_data: Option<String>,
				}

				impl TryFrom<PathBuf> for BackupFileInfo {
				type Error = ();

				fn try_from(value: PathBuf) -> Result<Self, Self::Error> {
				let Some(file_name) = value.file_name() else {
				return Err(());
				};
				let file_name = file_name.to_string_lossy();

				let Some(captures) = BACKUP_DATA_FILE_REGEX.captures(&file_name) else {
				return Err(());
				};

				let Some(backup_id) = captures
				.name("backup_id")
				.map(\|re_match\| re_match.as_str().to_string())
				else {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'backup_id' from backup filename: {file_name:?}"
				);
				return Err(());
				};

				let log_id = match captures
				.name("log_id")
				.map(\|re_match\| re_match.as_str().parse::<usize>())
				{
				None => None,
				Some(Ok(log_id)) => Some(log_id),
				Some(Err(err)) => {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'log_id' from backup filename: {file_name:?}. \
				Error: {err:?}"
				);
				return Err(());
				}
				};

				let additional_data = captures
				.name("additional_data")
				.map(\|m\| m.as_str().to_string());

				Ok(Self {
				backup_id,
				log_id,
				additional_data,
				})
				}
				}

keyserver/src/responders/responder-validators.test.js

				use lazy_static::lazy_static;
				use regex::Regex;
				use std::path::PathBuf;

				lazy_static! {
				static ref BACKUP_DATA_FILE_REGEX: Regex = Regex::new(
				r"^backup-(?<backup_id>[^-])(?:-log-(?<log_id>\d))?(?<additional_data>-userkeys\|-attachments)?$"
				)
				.expect("Regex compilation failed");
				}

				#[derive(Debug)]
				pub struct BackupFileInfo {
				pub backup_id: String,
				pub log_id: Option<usize>,
				pub additional_data: Option<String>,
				}

				impl TryFrom<PathBuf> for BackupFileInfo {
				type Error = ();

				fn try_from(value: PathBuf) -> Result<Self, Self::Error> {
				let Some(file_name) = value.file_name() else {
				return Err(());
				};
				let file_name = file_name.to_string_lossy();

				let Some(captures) = BACKUP_DATA_FILE_REGEX.captures(&file_name) else {
				return Err(());
				};

				let Some(backup_id) = captures
				.name("backup_id")
				.map(\|re_match\| re_match.as_str().to_string())
				else {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'backup_id' from backup filename: {file_name:?}"
				);
				return Err(());
				};

				let log_id = match captures
				.name("log_id")
				.map(\|re_match\| re_match.as_str().parse::<usize>())
				{
				None => None,
				Some(Ok(log_id)) => Some(log_id),
				Some(Err(err)) => {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'log_id' from backup filename: {file_name:?}. \
				Error: {err:?}"
				);
				return Err(());
				}
				};

				let additional_data = captures
				.name("additional_data")
				.map(\|m\| m.as_str().to_string());

				Ok(Self {
				backup_id,
				log_id,
				additional_data,
				})
				}
				}

				use lazy_static::lazy_static;
				use regex::Regex;
				use std::path::PathBuf;

				lazy_static! {
				static ref BACKUP_DATA_FILE_REGEX: Regex = Regex::new(
				r"^backup-(?<backup_id>[^-])(?:-log-(?<log_id>\d))?(?<additional_data>-userkeys\|-attachments)?$"
				)
				.expect("Regex compilation failed");
				}

				#[derive(Debug)]
				pub struct BackupFileInfo {
				pub backup_id: String,
				pub log_id: Option<usize>,
				pub additional_data: Option<String>,
				}

				impl TryFrom<PathBuf> for BackupFileInfo {
				type Error = ();

				fn try_from(value: PathBuf) -> Result<Self, Self::Error> {
				let Some(file_name) = value.file_name() else {
				return Err(());
				};
				let file_name = file_name.to_string_lossy();

				let Some(captures) = BACKUP_DATA_FILE_REGEX.captures(&file_name) else {
				return Err(());
				};

				let Some(backup_id) = captures
				.name("backup_id")
				.map(\|re_match\| re_match.as_str().to_string())
				else {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'backup_id' from backup filename: {file_name:?}"
				);
				return Err(());
				};

				let log_id = match captures
				.name("log_id")
				.map(\|re_match\| re_match.as_str().parse::<usize>())
				{
				None => None,
				Some(Ok(log_id)) => Some(log_id),
				Some(Err(err)) => {
				// Should never happen happen because regex matched the filename
				println!(
				"Couldn't parse 'log_id' from backup filename: {file_name:?}. \
				Error: {err:?}"
				);
				return Err(());
				}
				};

				let additional_data = captures
				.name("additional_data")
				.map(\|m\| m.as_str().to_string());

				Ok(Self {
				backup_id,
				log_id,
				additional_data,
				})
				}
				}