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extern crate app_dirs;
extern crate toml;
use self::app_dirs::{AppDataType, AppInfo};
use mullvad_types::relay_endpoint::RelayEndpoint;
use std::fs::File;
use std::io::{self, Read, Write};
use std::path::PathBuf;
error_chain! {
errors {
DirectoryError {
description("Unable to create settings directory for program")
}
ReadError(path: PathBuf) {
description("Unable to read settings file")
display("Unable to read settings from {}", path.to_string_lossy())
}
WriteError(path: PathBuf) {
description("Unable to write settings file")
display("Unable to write settings to {}", path.to_string_lossy())
}
ParseError {
description("Malformed settings")
}
}
}
static APP_INFO: AppInfo = AppInfo {
name: ::CRATE_NAME,
author: "Mullvad",
};
static SETTINGS_FILE: &str = "settings.toml";
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct Settings {
account_token: Option<String>,
custom_relay: Option<RelayEndpoint>,
}
const DEFAULT_SETTINGS: Settings = Settings {
account_token: None,
custom_relay: None,
};
impl Settings {
/// Loads user settings from file. If no file is present it returns the defaults.
pub fn load() -> Result<Settings> {
let settings_path = Self::get_settings_path()?;
match File::open(&settings_path) {
Ok(mut file) => {
info!("Loading settings from {}", settings_path.to_string_lossy());
Self::read_settings(&mut file, settings_path)
}
Err(ref e) if e.kind() == io::ErrorKind::NotFound => {
info!(
"No settings file at {}, using defaults",
settings_path.to_string_lossy()
);
Ok(DEFAULT_SETTINGS)
}
Err(e) => Err(e).chain_err(|| ErrorKind::ReadError(settings_path)),
}
}
/// Serializes the settings and saves them to the file it was loaded from.
fn save(&self) -> Result<()> {
let settings_path = Self::get_settings_path()?;
let data = toml::to_string(self).chain_err(|| ErrorKind::ParseError)?;
debug!("Writing settings to {}", settings_path.to_string_lossy());
let mut file = File::create(&settings_path)
.chain_err(|| ErrorKind::WriteError(settings_path.clone()))?;
file.write_all(data.as_bytes())
.chain_err(|| ErrorKind::WriteError(settings_path))?;
Ok(())
}
fn get_settings_path() -> Result<PathBuf> {
let dir = app_dirs::app_root(AppDataType::UserConfig, &APP_INFO)
.chain_err(|| ErrorKind::DirectoryError)?;
Ok(dir.join(SETTINGS_FILE))
}
fn read_settings(file: &mut File, path: PathBuf) -> Result<Settings> {
let mut data = Vec::new();
file.read_to_end(&mut data)
.chain_err(|| ErrorKind::ReadError(path))?;
toml::from_slice(&data).chain_err(|| ErrorKind::ParseError)
}
pub fn get_account_token(&self) -> Option<String> {
self.account_token.clone()
}
/// Changes account number to the one given. Also saves the new settings to disk.
/// The boolean in the Result indicates if the account token changed or not
pub fn set_account_token(&mut self, mut account_token: Option<String>) -> Result<bool> {
if account_token.as_ref().map(String::len) == Some(0) {
debug!("Setting empty account token is treated as unsetting it");
account_token = None;
}
if account_token != self.account_token {
info!(
"Changing account token from {} to {}",
Self::format_account_token(&self.account_token),
Self::format_account_token(&account_token),
);
self.account_token = account_token;
self.save().map(|_| true)
} else {
Ok(false)
}
}
fn format_account_token(account_token: &Option<String>) -> String {
match *account_token {
Some(ref account_token) => format!("\"{}\"", account_token),
None => "[none]".to_owned(),
}
}
pub fn get_custom_relay(&self) -> Option<RelayEndpoint> {
self.custom_relay.clone()
}
pub fn set_custom_relay(&mut self, relay_endpoint: Option<RelayEndpoint>) -> Result<bool> {
if self.custom_relay != relay_endpoint {
match &relay_endpoint {
&Some(ref data) => info!("Setting a custom relay: {}", data),
&None => info!("Removing the custom relay"),
}
self.custom_relay = relay_endpoint;
self.save().map(|_| true)
} else {
Ok(false)
}
}
}
|
