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use std::{env, ops::Deref};
use config::{Config, Environment, File};
use log::info;
use serde::{Deserialize, de::DeserializeOwned};
use crate::error::GenericError;
#[derive(Debug, Deserialize, Clone)]
pub struct Settings<T: Clone + DeserializeOwned + Default> {
#[serde(skip_deserializing)]
pub config: T,
pub monitoring: crate::monitoring::MonitoringConfiguration,
pub nats: crate::nats::NatsConfiguration,
pub redis: crate::redis::RedisConfiguration,
}
impl<'de, T: Clone + DeserializeOwned + Default> Settings<T>
{
pub fn new(service_name: &str) -> Result<Settings<T>, GenericError> {
let mut builder = Config::builder();
builder = builder.add_source(File::with_name("config/default"));
let mode = env::var("ENV").unwrap_or_else(|_| "development".into());
info!("Configuration Environment: {}", mode);
builder = builder.add_source(File::with_name(&format!("config/{}", mode)).required(false));
builder = builder.add_source(File::with_name("config/local").required(false));
let env = Environment::with_prefix("NOVA").separator("__");
// we can configure each component using environment variables
builder = builder.add_source(env);
let config = builder.build()?;
let mut settings: Settings<T> = config.clone().try_deserialize()?;
// try to load the config
settings.config = config.get::<T>(service_name)?;
Ok(settings)
}
}
impl<T: Clone + DeserializeOwned + Default> Deref for Settings<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&self.config
}
}
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