forms/src/settings.rs

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