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use crate::users::UserRepository;
use crate::locations::LocationRepository;
use crate::weather_thresholds::{WeatherThresholdRepository, WeatherThreshold};
use crate::notifications::{NtfySettingsRepository, SmtpSettingsRepository, NtfySettings, SmtpSettings};
use serde_json::Value;
use tera::{Tera, Context};
use reqwest::Client;
use std::sync::{Arc, Mutex};
use tokio_task_scheduler::{Scheduler, Task};
use tokio::time::Duration;
const OWM_API_URL: &str = "https://api.openweathermap.org/data/2.5/forecast";
const ALERT_WINDOW_HOURS: i64 = 24;
pub struct WeatherPoller {
pub db: Arc<sqlx::SqlitePool>,
pub owm_api_key: String,
pub tera: Arc<Mutex<Tera>>,
}
impl WeatherPoller {
pub async fn check_all(&self) {
let user_repo = UserRepository { db: &self.db };
let loc_repo = LocationRepository { db: &self.db };
let users = user_repo.list_users().await.unwrap_or_default();
for user in users {
if let Some(location) = loc_repo.list_locations().await.unwrap_or_default().into_iter().find(|l| l.user_id == user.id) {
self.check_user_weather(user.id, location.latitude, location.longitude).await;
}
}
}
pub async fn check_user_weather(&self, user_id: i64, lat: f64, lon: f64) {
if let Ok(Some(forecast)) = self.fetch_forecast(lat, lon).await {
let threshold_repo = WeatherThresholdRepository { db: &self.db };
let thresholds = threshold_repo.list_thresholds(user_id).await.unwrap_or_default().into_iter().filter(|t| t.enabled).collect::<Vec<_>>();
if let Some(entry) = find_first_alert_entry(&forecast, &thresholds) {
self.send_notifications(user_id, &entry).await;
}
}
}
pub async fn fetch_forecast(&self, lat: f64, lon: f64) -> Result<Option<Vec<Value>>, reqwest::Error> {
let client = Client::new();
let resp = client.get(OWM_API_URL)
.query(&[
("lat", lat.to_string()),
("lon", lon.to_string()),
("units", "metric".to_string()),
("appid", self.owm_api_key.clone()),
])
.send()
.await?;
let json: Value = resp.json().await?;
Ok(json["list"].as_array().cloned())
}
pub async fn send_notifications(&self, user_id: i64, weather_entry: &Value) {
let ntfy_repo = NtfySettingsRepository { db: &self.db };
let smtp_repo = SmtpSettingsRepository { db: &self.db };
let tera = self.tera.clone();
if let Some(ntfy) = ntfy_repo.get_by_user(user_id).await.unwrap_or(None) {
if ntfy.enabled {
send_ntfy_notification(&ntfy, weather_entry, tera.clone()).await;
}
}
if let Some(smtp) = smtp_repo.get_by_user(user_id).await.unwrap_or(None) {
if smtp.enabled {
send_smtp_notification(&smtp, weather_entry, tera.clone()).await;
}
}
}
}
fn find_first_alert_entry(forecast: &[Value], thresholds: &[WeatherThreshold]) -> Option<Value> {
use chrono::{Utc, TimeZone};
let now = Utc::now();
for entry in forecast {
if let Some(ts) = entry["dt"].as_i64() {
let forecast_time = Utc.timestamp_opt(ts, 0).single()?;
if (forecast_time - now).num_hours() > ALERT_WINDOW_HOURS {
break;
}
if thresholds.iter().any(|t| threshold_triggered(t, entry)) {
return Some(entry.clone());
}
}
}
None
}
fn threshold_triggered(threshold: &WeatherThreshold, entry: &Value) -> bool {
let value = match threshold.condition_type.as_str() {
"wind_speed" => entry.pointer("/wind/speed").and_then(|v| v.as_f64()).unwrap_or(0.0) * 3.6,
"rain" => entry.pointer("/rain/3h").and_then(|v| v.as_f64()).unwrap_or(0.0),
"temp_min" | "temp_max" => entry.pointer("/main/temp").and_then(|v| v.as_f64()).unwrap_or(0.0),
_ => return false,
};
compare(value, &threshold.operator, threshold.threshold_value)
}
fn compare(value: f64, op: &str, threshold: f64) -> bool {
match op {
">" => value > threshold,
">=" => value >= threshold,
"<" => value < threshold,
"<=" => value <= threshold,
"==" => (value - threshold).abs() < std::f64::EPSILON,
_ => false,
}
}
async fn send_ntfy_notification(ntfy: &NtfySettings, weather_entry: &Value, tera: Arc<Mutex<Tera>>) {
let mut ctx = Context::new();
add_weather_context(&mut ctx, weather_entry);
let title = if let Some(tpl) = &ntfy.title_template {
let mut tera = tera.lock().unwrap();
tera.render_str(tpl, &ctx).unwrap_or_else(|_| "🚨 Weather Alert".to_string())
} else {
"🚨 Weather Alert".to_string()
};
let message = if let Some(tpl) = &ntfy.message_template {
let mut tera = tera.lock().unwrap();
tera.render_str(tpl, &ctx).unwrap_or_else(|_| "🚨 Weather alert for your location".to_string())
} else {
default_weather_message(weather_entry)
};
let client = Client::new();
let _ = client.post(&format!("{}/{}", ntfy.server_url, ntfy.topic))
.header("Priority", ntfy.priority.to_string())
.header("Title", title)
.body(message)
.send()
.await;
}
async fn send_smtp_notification(smtp: &SmtpSettings, weather_entry: &Value, tera: Arc<Mutex<Tera>>) {
use lettre::{Message, SmtpTransport, Transport, transport::smtp::authentication::Credentials};
let mut ctx = Context::new();
add_weather_context(&mut ctx, weather_entry);
let subject = if let Some(tpl) = &smtp.subject_template {
let mut tera = tera.lock().unwrap();
tera.render_str(tpl, &ctx).unwrap_or_else(|_| "⚠️ Weather Alert for Your Location".to_string())
} else {
"⚠️ Weather Alert for Your Location".to_string()
};
let body = if let Some(tpl) = &smtp.body_template {
let mut tera = tera.lock().unwrap();
tera.render_str(tpl, &ctx).unwrap_or_else(|_| default_weather_message(weather_entry))
} else {
default_weather_message(weather_entry)
};
let from = smtp.from_email.clone().unwrap_or_else(|| smtp.email.clone());
let from_name = smtp.from_name.clone().unwrap_or_else(|| "Silmätaivas Alerts".to_string());
let email = Message::builder()
.from(format!("{} <{}>", from_name, from).parse().unwrap())
.to(smtp.email.parse().unwrap())
.subject(subject)
.body(body)
.unwrap();
let creds = smtp.username.as_ref().and_then(|u| smtp.password.as_ref().map(|p| Credentials::new(u.clone(), p.clone())));
let mailer = if let Some(creds) = creds {
SmtpTransport::relay(&smtp.smtp_server).unwrap()
.port(smtp.smtp_port as u16)
.credentials(creds)
.build()
} else {
SmtpTransport::relay(&smtp.smtp_server).unwrap()
.port(smtp.smtp_port as u16)
.build()
};
let _ = mailer.send(&email);
}
fn add_weather_context(ctx: &mut Context, entry: &Value) {
ctx.insert("temp", &entry.pointer("/main/temp").and_then(|v| v.as_f64()).unwrap_or(0.0));
ctx.insert("wind_speed", &(entry.pointer("/wind/speed").and_then(|v| v.as_f64()).unwrap_or(0.0) * 3.6));
ctx.insert("rain", &entry.pointer("/rain/3h").and_then(|v| v.as_f64()).unwrap_or(0.0));
ctx.insert("time", &entry["dt_txt"].as_str().unwrap_or("N/A"));
ctx.insert("humidity", &entry.pointer("/main/humidity").and_then(|v| v.as_f64()).unwrap_or(0.0));
ctx.insert("pressure", &entry.pointer("/main/pressure").and_then(|v| v.as_f64()).unwrap_or(0.0));
}
fn default_weather_message(entry: &Value) -> String {
let temp = entry.pointer("/main/temp").and_then(|v| v.as_f64()).unwrap_or(0.0);
let wind = entry.pointer("/wind/speed").and_then(|v| v.as_f64()).unwrap_or(0.0) * 3.6;
let rain = entry.pointer("/rain/3h").and_then(|v| v.as_f64()).unwrap_or(0.0);
let time = entry["dt_txt"].as_str().unwrap_or("N/A");
format!("🚨 Weather alert for your location ({}):\n\n🌬️ Wind: {:.1} km/h\n🌧️ Rain: {:.1} mm\n🌡️ Temperature: {:.1} °C\n\nStay safe,\n— Silmätaivas", time, wind, rain, temp)
}
// Unit tests for threshold logic and template rendering can be added here.
|
