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use std::{fs::File, io::Read, process, time::Duration};
use rumqttc::{Client, Connection, MqttOptions};
use serde::Deserialize;
use crate::PROGRAM;
#[derive(Deserialize)]
pub struct Credentials {
pub username: String,
pub password: String,
}
fn default_host() -> String {
"localhost".to_string()
}
fn default_port() -> u16 {
1883
}
fn default_id_prefix() -> String {
PROGRAM.to_string()
}
#[derive(Deserialize)]
pub struct Config {
#[serde(default = "default_host")]
pub host: String,
#[serde(default = "default_port")]
pub port: u16,
#[serde(default = "default_id_prefix")]
pub id_prefix: String,
pub credentials: Option<Credentials>,
}
impl Config {
pub fn mqtt_client(&self) -> (Client, Connection) {
let client_id = format!("{}_{}", self.id_prefix, process::id());
let mut options = MqttOptions::new(client_id, &self.host, self.port);
if let Some(credentials) = &self.credentials {
options.set_credentials(&credentials.username, &credentials.password);
}
options.set_keep_alive(Duration::from_secs(5));
Client::new(options, 10)
}
}
pub fn get() -> Config {
let config = if let Ok(dirs) = xdg::BaseDirectories::with_prefix(PROGRAM) {
if let Some(config_file) = dirs.find_config_file("config.toml") {
let mut config_file = File::open(config_file).unwrap();
let mut config = String::new();
config_file.read_to_string(&mut config).unwrap();
Some(config)
} else {
None
}
} else {
None
};
let config = config.unwrap_or_default();
toml::from_str(&config).unwrap()
}
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