fn parse_file_name()

in crates/core/src/file_group/log_file/mod.rs [54:96]

• 35 lines of code
• 10 McCabe index (conditional complexity)

    fn parse_file_name(file_name: &str) -> Result<(String, String, String, String, String)> {
        let err_msg = format!("Failed to parse file name '{file_name}' for log file.");

        if !file_name.starts_with(LOG_FILE_PREFIX) {
            return Err(CoreError::FileGroup(err_msg));
        }

        let file_name = &file_name[LOG_FILE_PREFIX.len_utf8()..];

        let (file_id, rest) = file_name
            .split_once('_')
            .ok_or_else(|| CoreError::FileGroup(err_msg.clone()))?;

        let (middle, file_write_token) = rest
            .rsplit_once('_')
            .ok_or_else(|| CoreError::FileGroup(err_msg.clone()))?;

        let parts: Vec<&str> = middle.split('.').collect();
        if parts.len() != 3 {
            return Err(CoreError::FileGroup(err_msg.clone()));
        }

        let base_commit_timestamp = parts[0];
        let log_file_extension = parts[1];
        let log_file_version = parts[2];

        if file_id.is_empty()
            || base_commit_timestamp.is_empty()
            || log_file_extension.is_empty()
            || log_file_version.is_empty()
            || file_write_token.is_empty()
        {
            return Err(CoreError::FileGroup(err_msg.clone()));
        }

        Ok((
            file_id.to_string(),
            base_commit_timestamp.to_string(),
            log_file_extension.to_string(),
            log_file_version.to_string(),
            file_write_token.to_string(),
        ))
    }