167 lines
4.8 KiB
Rust
167 lines
4.8 KiB
Rust
/*
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* Copyright (C) 2022 Aravinth Manivannan <realaravinth@batsense.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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use std::env;
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use std::path::Path;
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use config::{builder::DefaultState, Config, ConfigBuilder, ConfigError, Environment, File};
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use derive_more::Display;
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use log::info;
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use log::warn;
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use serde::Deserialize;
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use serde::Serialize;
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use url::Url;
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const PREFIX: &str = "LPCONDUCTOR";
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const SEPARATOR: &str = "_";
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#[derive(Debug, Clone, Deserialize)]
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pub struct Server {
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pub port: u32,
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pub domain: String,
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pub ip: String,
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pub url_prefix: Option<String>,
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pub proxy_has_tls: bool,
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}
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impl Server {
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#[cfg(not(tarpaulin_include))]
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pub fn get_ip(&self) -> String {
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format!("{}:{}", self.ip, self.port)
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}
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}
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#[derive(Deserialize, Serialize, Display, Eq, PartialEq, Clone, Debug)]
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#[serde(rename_all = "lowercase")]
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pub enum ConductorType {
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/// doesn't do anything
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#[display(fmt = "dummy")]
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Dummy,
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}
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#[derive(Debug, Clone, Deserialize)]
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pub struct Creds {
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pub token: String,
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}
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#[derive(Debug, Clone, Deserialize)]
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pub struct Settings {
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pub debug: bool,
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pub creds: Creds,
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pub server: Server,
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pub source_code: Url,
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pub conductor: ConductorType,
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}
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#[cfg(not(tarpaulin_include))]
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impl Settings {
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pub fn authenticate(&self, token: &str) -> bool {
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self.creds.token == token
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}
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pub fn new() -> Result<Self, ConfigError> {
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let mut s = Config::builder();
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const CURRENT_DIR: &str = "./config/config.toml";
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const ETC: &str = "/etc/librepages/conductor/config.toml";
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if let Ok(path) = env::var("LPCONDUCTOR_CONFIG") {
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s = s.add_source(File::with_name(&path));
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} else if Path::new(CURRENT_DIR).exists() {
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// merging default config from file
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s = s.add_source(File::with_name(CURRENT_DIR));
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} else if Path::new(ETC).exists() {
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s = s.add_source(File::with_name(ETC));
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} else {
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warn!("configuration file not found");
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}
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s = s.add_source(Environment::with_prefix(PREFIX).separator(SEPARATOR));
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s = set_separator_field(s);
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match env::var("PORT") {
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Ok(val) => {
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s = s.set_override("server.port", val).unwrap();
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}
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Err(e) => warn!("couldn't interpret PORT: {}", e),
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}
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let s = s.build()?;
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match s.try_deserialize::<Self>() {
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Ok(val) => {
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Ok(val)
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},
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Err(e) => Err(ConfigError::Message(format!("\n\nError: {}. If it says missing fields, then please refer to https://git.batsense.net/LibrePages/conductor to learn more about how conductor reads configuration\n\n", e))),
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}
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}
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}
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#[cfg(not(tarpaulin_include))]
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fn set_separator_field(mut s: ConfigBuilder<DefaultState>) -> ConfigBuilder<DefaultState> {
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// ref: https://github.com/mehcode/config-rs/issues/391
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fn from_env(
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s: ConfigBuilder<DefaultState>,
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env_name: &str,
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config_name: &str,
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) -> ConfigBuilder<DefaultState> {
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if let Ok(val) = env::var(env_name) {
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info!("Overriding {config_name} with data from env var {env_name}");
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s.set_override(config_name, val)
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.unwrap_or_else(|_| panic!("Couldn't set {config_name} from env var {env_name}"))
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} else {
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s
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}
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}
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s = from_env(s, &format!("{PREFIX}{SEPARATOR}SOURCE_CODE"), "source_code");
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s = from_env(
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s,
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&format!("{PREFIX}{SEPARATOR}SERVER{SEPARATOR}URL_PREFIX"),
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"server.url_prefix",
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);
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s = from_env(
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s,
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&format!("{PREFIX}{SEPARATOR}SERVER{SEPARATOR}PROXY_HAS_TLS"),
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"server.proxy_has_tls",
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);
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s = from_env(
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s,
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&format!("{PREFIX}{SEPARATOR}CREDS{SEPARATOR}TOKEN"),
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"creds.token",
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);
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s
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn creds_works() {
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let settings = Settings::new().unwrap();
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let creds = settings.creds.clone();
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assert!(settings.authenticate(&creds.token));
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let mut creds = settings.creds.clone();
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creds.token = "noexist".into();
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assert!(!settings.authenticate(&creds.token))
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}
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}
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