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use std::env;
use anyhow::{Result, Context, anyhow};
use log::*;
pub struct DiplonatConfig {
pub private_ip: String,
pub consul_node_name: String,
pub consul_url: String,
pub refresh_time: u32,
pub expiration_time: u32
}
pub fn load_env() -> Result<DiplonatConfig> {
let epi = "DIPLONAT_PRIVATE_IP";
let ert = "DIPLONAT_REFRESH_TIME";
let eet = "DIPLONAT_EXPIRATION_TIME";
let ecnd = "DIPLONAT_CONSUL_NODE_NAME";
let ecu = "DIPLONAT_CONSUL_URL";
let config = DiplonatConfig {
consul_url: match env::var(ecu) { Ok(e) => e, Err(_) => "http://127.0.0.1:8500".to_string() },
private_ip: env::var(epi)
.with_context(|| format!("{} env var must be defined, eg: 192.168.0.18", epi))?,
refresh_time: env::var(ert)
.with_context(|| format!("{} env var must be defined, eg: 60", ert))?
.parse()
.with_context(|| format!("{} env var must be an integer, eg: 60", ert))?,
expiration_time: env::var(eet)
.with_context(|| format!("{} env var must be defined, eg: 300", eet))?
.parse()
.with_context(|| format!("{} env var must be an integer, eg: 300", eet))?,
consul_node_name: env::var(ecnd)
.with_context(|| format!("{} env var must be defined", ecnd))?
};
if config.refresh_time * 2 > config.expiration_time {
return Err(anyhow!("Expiration time (currently: {}s) must be twice bigger than refresh time (currently: {}s)", config.expiration_time, config.refresh_time))
}
info!("Consul URL: {}", config.consul_url);
info!("Consul node name: {}", config.consul_node_name);
info!("Private IP address: {}", config.private_ip);
info!("Refresh time: {} seconds", config.refresh_time);
info!("Expiration time: {} seconds", config.expiration_time);
return Ok(config);
}
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