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/*!
* Weather.gov Data Aggregator
*
*
* Matt Kohls
* GPL v3
* 2023
*/
use std::{
process,
time::Duration,
collections::HashMap
};
use reqwest::header::USER_AGENT;
use config::Config;
extern crate paho_mqtt as mqtt;
mod weather_gov_json;
use crate::weather_gov_json::weather_gov_json::{
Forecast,
Alerts,
};
const DEFAULT_BROKER:&str = "tcp://localhost:1883";
const DEFAULT_CLIENT_ID:&str = "weather-data-aggregator";
const DEFAULT_ROOT_FORECAST_TOPIC:&str = "forecast";
const QOS:i32 = 0;
const DEFAULT_USER_AGENT_STRING:&str = "Mozilla/5.0 (X11; Linux x86_64; rv:104.0) Gecko/20100101 Firefox/104.0";
const GRIDPOINTS_PATH:&str = "https://api.weather.gov/gridpoints/";
const ACTIVE_ALERTS_PATH:&str = "https://api.weather.gov/alerts/active?status=actual&zone=";
fn main() {
let settings = Config::builder()
.add_source(config::File::with_name("config"))
.build()
.unwrap()
.try_deserialize::<HashMap<String, String>>()
.unwrap_or_else(|err| {
println!("Error reading config file: {:?}", err);
process::exit(1);
});
let mqtt_client = create_mqtt_client(&settings);
let mut root_forecast_topic = &DEFAULT_ROOT_FORECAST_TOPIC.to_string();
if settings.contains_key("root_forecast_topic") {
root_forecast_topic = &settings["root_forecast_topic"];
}
let mut user_agent = &DEFAULT_USER_AGENT_STRING.to_string();
if settings.contains_key("user_agent") {
user_agent = &settings["user_agent"];
}
let mut active_alert_url = ACTIVE_ALERTS_PATH.to_string();
if settings.contains_key("zone_id") {
active_alert_url.push_str(&settings["zone_id"]);
let alert_response = fetch_alerts(&active_alert_url, &user_agent);
match alert_response {
Err(err) => println!("Error fetching alerts: {} - {:?}", active_alert_url, err),
Ok(alerts) => print_alerts(&alerts),
}
} else {
println!("No zone_id, skipping active alert lookup & publish")
}
let mut forecast_url = GRIDPOINTS_PATH.to_string();
if settings.contains_key("forecast_office") && settings.contains_key("grid_x") && settings.contains_key("grid_y") {
forecast_url.push_str(&format!("{}/{},{}/forecast", &settings["forecast_office"], &settings["grid_x"], &settings["grid_y"]));
let daily_response = fetch_forecast(&forecast_url, &user_agent);
match daily_response {
Err(err) => println!("Error fetching forecast: {} - {:?}", forecast_url, err),
Ok(forecast) => publish_forecast(&forecast, false, root_forecast_topic, &mqtt_client),
}
forecast_url.push_str("/hourly");
let hourly_response = fetch_forecast(&forecast_url, &user_agent);
match hourly_response {
Err(err) => println!("Error fetching forecast: {} - {:?}", forecast_url, err),
Ok(forecast) => print_forecast(&forecast),
}
} else {
println!("No (or missing one of) the following: forecast_office, grid_x, grid_y, skipping forecast lookup & publish");
}
let _ = mqtt_client.disconnect_after(Duration::from_secs(20));
}
/**
* Creates a new MQTT client that is connected to the broker
*
**/
fn create_mqtt_client(settings: &HashMap<String, String>) -> mqtt::Client {
let mut broker = &DEFAULT_BROKER.to_string();
if settings.contains_key("broker") {
broker = &settings["broker"];
}
let mut mqtt_client_id = &DEFAULT_CLIENT_ID.to_string();
if settings.contains_key("client_id") {
mqtt_client_id = &settings["client_id"];
}
let mqtt_create_opts = mqtt::CreateOptionsBuilder::new()
.server_uri(broker.to_string())
.client_id(mqtt_client_id.to_string())
.finalize();
let mqtt_client = mqtt::Client::new(mqtt_create_opts).unwrap_or_else(|err| {
println!("MQTT Client creation error: {:?}", err);
process::exit(1);
});
let mqtt_connection_opts = mqtt::ConnectOptionsBuilder::new()
.keep_alive_interval(Duration::from_secs(20))
.clean_session(true)
.finalize();
if let Err(e) = mqtt_client.connect(mqtt_connection_opts) {
println!("MQTT Client connection error: {:?}", e);
process::exit(1);
}
mqtt_client
}
fn publish_forecast(forecast: &Forecast, hourly: bool, root_topic: &str, client: &mqtt::Client) {
let mut forecast_topic = root_topic.to_string();
if hourly {
forecast_topic = format!("{forecast_topic}/hourly");
}
for period in forecast.properties.periods.iter().take(12) {
forecast_topic = format!("{forecast_topic}/{0}", period.number);
if !hourly {
publish_message_to(format!("{0}", period.name).as_str(),
format!("{forecast_topic}/name").as_str(),
client);
}
publish_message_to(format!("{0}", period.startTime).as_str(),
format!("{forecast_topic}/time").as_str(),
client);
publish_message_to(format!("{0} {1}", period.temperature, period.temperatureUnit).as_str(),
format!("{forecast_topic}/temperature").as_str(),
client);
publish_message_to(format!("{0}", period.windSpeed).as_str(),
format!("{forecast_topic}/windSpeed").as_str(),
client);
publish_message_to(format!("{0}", period.shortForecast).as_str(),
format!("{forecast_topic}/shortForecast").as_str(),
client);
}
}
fn publish_message_to(message: &str, topic: &str, client: &mqtt::Client) {
let message = mqtt::Message::new_retained(topic, message, QOS);
client.publish(message).unwrap_or_else(|err| {
println!("MQTT Client error publishing message: {:?}", err);
});
}
fn fetch_forecast(url: &str, user_agent: &str) -> Result<Forecast, Box<dyn std::error::Error>> {
let response = reqwest::blocking::Client::new()
.get(url)
.header(USER_AGENT, user_agent)
.send()?;
match response.status() {
reqwest::StatusCode::OK => Ok(response.json::<Forecast>()?),
reqwest::StatusCode::BAD_REQUEST => Err("Bad Request".into()),
status => Err(status.to_string().into()),
}
}
fn print_forecast(forecast: &Forecast) {
for period in forecast.properties.periods.iter() {
println!("{} {}:{} - Temp: {} {}, Wind: {}, {}", period.number, period.name, period.startTime, period.temperature, period.temperatureUnit, period.windSpeed, period.shortForecast);
}
}
fn fetch_alerts(url: &str, user_agent: &str) -> Result<Alerts, Box<dyn std::error::Error>> {
let response = reqwest::blocking::Client::new()
.get(url)
.header(USER_AGENT, user_agent)
.send()?;
match response.status() {
reqwest::StatusCode::OK => Ok(response.json::<Alerts>()?),
reqwest::StatusCode::BAD_REQUEST => Err("Bad Request".into()),
status => Err(status.to_string().into()),
}
}
fn print_alerts(alerts: &Alerts) {
if alerts.features.len() == 0 {
println!("No active alerts");
} else {
for feature in alerts.features.iter() {
println!("Event: {} {} - {:?} | {:?}", feature.properties.event, feature.properties.severity, feature.properties.onset, feature.properties.ends);
}
}
}
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