voynich 0.1.1

Library for creating anonymous, end-to-end encrypted and authenticated chat applications
Documentation 
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use crate::util::CONFIG_HOME;
use anyhow::Result;
use clap::ValueEnum;
use serde::Deserialize;
use serde_with::{base64::Base64, serde_as};
use std::fs::read_to_string;
use std::io::ErrorKind;
use std::net::SocketAddr;
use std::str::FromStr;
use tor_client_lib::auth::TorAuthentication;

#[derive(Debug, Default, Deserialize)]
pub struct Config {
    pub system: SystemConfig,
    pub tor: TorConfig,
}

impl Config {
    pub fn update(self, other: Config) -> Self {
        Self {
            system: self.system.update(other.system),
            tor: self.tor.update(other.tor),
        }
    }
}

#[derive(Debug, Deserialize)]
pub struct SystemConfig {
    pub debug: bool,
    pub connection_test: bool,
}

impl Default for SystemConfig {
    fn default() -> Self {
        Self {
            debug: false,
            connection_test: true,
        }
    }
}

impl SystemConfig {
    pub fn update(self, other: SystemConfig) -> Self {
        Self {
            debug: other.debug,
            connection_test: other.connection_test,
        }
    }
}

#[derive(Clone, Debug, Deserialize, ValueEnum)]
pub enum TorAuthConfig {
    #[serde(alias = "hashed-password")]
    HashedPassword,

    #[serde(alias = "safe-cookie")]
    SafeCookie,
}

#[serde_as]
#[derive(Debug, Deserialize)]
pub struct TorConfig {
    pub proxy_address: SocketAddr,

    pub control_address: SocketAddr,

    pub authentication: Option<TorAuthConfig>,

    #[serde_as(as = "Base64")]
    pub cookie: Option<Vec<u8>>,

    pub hashed_password: Option<String>,
}

impl Default for TorConfig {
    fn default() -> Self {
        Self {
            proxy_address: SocketAddr::from_str("127.0.0.1:9050").unwrap(),
            control_address: SocketAddr::from_str("127.0.0.1:9051").unwrap(),
            authentication: None,
            cookie: None,
            hashed_password: None,
        }
    }
}

impl TorConfig {
    pub fn update(self, other: TorConfig) -> Self {
        Self {
            proxy_address: other.proxy_address,
            control_address: other.control_address,
            authentication: other.authentication.or(self.authentication),
            cookie: other.cookie.or(self.cookie),
            hashed_password: other.hashed_password.or(self.hashed_password),
        }
    }
}

impl From<&TorConfig> for TorAuthentication {
    fn from(config: &TorConfig) -> TorAuthentication {
        match config.authentication {
            Some(TorAuthConfig::HashedPassword) => {
                TorAuthentication::HashedPassword(config.hashed_password.clone().unwrap())
            }
            Some(TorAuthConfig::SafeCookie) => match config.cookie.clone() {
                Some(cookie) => TorAuthentication::SafeCookie(Some(cookie)),
                None => TorAuthentication::SafeCookie(None),
            },
            None => TorAuthentication::Null,
        }
    }
}

pub fn read_config_file(location: Option<String>) -> Result<Option<Config>> {
    let location = match location {
        Some(location) => location,
        None => format!("{}/voynich/config.toml", *CONFIG_HOME),
    };
    let config_string = match read_to_string(location) {
        Ok(config) => config,
        Err(error) => match error.kind() {
            ErrorKind::NotFound => {
                return Ok(None);
            }
            _ => Err(error)?,
        },
    };
    Ok(toml::from_str(&config_string)?)
}

pub fn get_config(config_file_location: Option<String>) -> Result<Config> {
    match read_config_file(config_file_location) {
        Ok(Some(config_from_file)) => Ok(Config::default().update(config_from_file)),
        Ok(None) => Ok(Config::default()),
        Err(error) => Err(error),
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use anyhow::Result;

    #[test]
    fn test_read_config_file() -> Result<()> {
        println!(
            "{:?}",
            read_config_file(Some("./fixtures/config.toml".to_string()))
        );
        assert!(read_config_file(Some("./fixtures/config.toml".to_string()))?.is_some());
        Ok(())
    }

    #[test]
    fn test_config_file_missing() -> Result<()> {
        match read_config_file(Some("./fixtures/configx.toml".to_string())) {
            Ok(None) => {}
            _ => unreachable!(),
        }
        Ok(())
    }

    #[test]
    fn test_bad_config_file() -> Result<()> {
        assert!(read_config_file(Some("./fixtures/bad_config.toml".to_string())).is_err());
        Ok(())
    }
}