Cargo.lock

@@ -485,6 +485,26 @@ version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19d374276b40fb8bbdee95aef7c7fa6b5316ec764510eb64b8dd0e2ed0d7e7f5"
 
+[[package]]
+name = "crc32fast"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3855a8a784b474f333699ef2bbca9db2c4a1f6d9088a90a2d25b1eb53111eaa"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "cron"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f8c3e73077b4b4a6ab1ea5047c37c57aee77657bc8ecd6f29b0af082d0b0c07"
+dependencies = [
+ "chrono",
+ "nom",
+ "once_cell",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.12"
@@ -774,6 +794,16 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8fcfdc7a0362c9f4444381a9e697c79d435fe65b52a37466fc2c1184cee9edc6"
 
+[[package]]
+name = "flate2"
+version = "1.0.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f54427cfd1c7829e2a139fcefea601bf088ebca651d2bf53ebc600eac295dae"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "flume"
 version = "0.11.0"
@@ -1301,6 +1331,17 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
+[[package]]
+name = "job_scheduler_ng"
+version = "2.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87c252207f323e2996d087759ebdcff8f608cd3eaa9896909a0c2dd3050a3c6a"
+dependencies = [
+ "chrono",
+ "cron",
+ "uuid",
+]
+
 [[package]]
 name = "js-sys"
 version = "0.3.69"
@@ -2227,6 +2268,7 @@ dependencies = [
  "futures",
  "ics",
  "itertools",
+ "job_scheduler_ng",
  "lettre",
  "log",
  "openssl",
@@ -2236,6 +2278,7 @@ dependencies = [
  "serde_json",
  "sqlx",
  "tera",
+ "ureq",
 ]
 
 [[package]]
@@ -2284,10 +2327,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f9d5a6813c0759e4609cd494e8e725babae6a2ca7b62a5536a13daaec6fcb7ba"
 dependencies = [
  "ring",
- "rustls-webpki",
+ "rustls-webpki 0.101.7",
  "sct",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.22.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf4ef73721ac7bcd79b2b315da7779d8fc09718c6b3d2d1b2d94850eb8c18432"
+dependencies = [
+ "log",
+ "ring",
+ "rustls-pki-types",
+ "rustls-webpki 0.102.3",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rustls-pemfile"
 version = "1.0.4"
@@ -2297,6 +2354,12 @@ dependencies = [
  "base64 0.21.7",
 ]
 
+[[package]]
+name = "rustls-pki-types"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "beb461507cee2c2ff151784c52762cf4d9ff6a61f3e80968600ed24fa837fa54"
+
 [[package]]
 name = "rustls-webpki"
 version = "0.101.7"
@@ -2307,6 +2370,17 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "rustls-webpki"
+version = "0.102.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3bce581c0dd41bce533ce695a1437fa16a7ab5ac3ccfa99fe1a620a7885eabf"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.15"
@@ -2590,7 +2664,7 @@ dependencies = [
  "once_cell",
  "paste",
  "percent-encoding",
- "rustls",
+ "rustls 0.21.10",
  "rustls-pemfile",
  "serde",
  "serde_json",
@@ -2603,7 +2677,7 @@ dependencies = [
  "tokio-stream",
  "tracing",
  "url",
- "webpki-roots",
+ "webpki-roots 0.25.4",
 ]
 
 [[package]]
@@ -3232,6 +3306,25 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
+[[package]]
+name = "ureq"
+version = "2.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d11a831e3c0b56e438a28308e7c810799e3c118417f342d30ecec080105395cd"
+dependencies = [
+ "base64 0.22.0",
+ "flate2",
+ "log",
+ "once_cell",
+ "rustls 0.22.4",
+ "rustls-pki-types",
+ "rustls-webpki 0.102.3",
+ "serde",
+ "serde_json",
+ "url",
+ "webpki-roots 0.26.1",
+]
+
 [[package]]
 name = "url"
 version = "2.5.0"
@@ -3255,6 +3348,15 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "uuid"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a183cf7feeba97b4dd1c0d46788634f6221d87fa961b305bed08c851829efcc0"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "valuable"
 version = "0.1.0"
@@ -3364,6 +3466,15 @@ version = "0.25.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f20c57d8d7db6d3b86154206ae5d8fba62dd39573114de97c2cb0578251f8e1"
 
+[[package]]
+name = "webpki-roots"
+version = "0.26.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3de34ae270483955a94f4b21bdaaeb83d508bb84a01435f393818edb0012009"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "whoami"
 version = "1.5.1"

Cargo.toml

@@ -25,6 +25,8 @@ futures = "0.3"
 lettre = "0.11"
 csv = "1.3"
 itertools = "0.12"
+job_scheduler_ng = "2.0"
+ureq = { version = "2.9", features = ["json"] }
 
 [target.'cfg(not(windows))'.dependencies]
 openssl = { version = "0.10", features = [ "vendored" ] }

Rocket.toml

@@ -4,3 +4,4 @@ rss_key = "rss-key-for-ci"
 limits = { file = "10 MiB", data-form = "10 MiB"}
 smtp_pw = "8kIjlLH79Ky6D3jQ"
 usage_log_path = "./usage.txt"
+openweathermap_key = "c8dab8f91b5b815d76e9879cbaecd8d5"

migration.sql

@@ -175,3 +175,22 @@ CREATE TABLE IF NOT EXISTS "boat_reservation" (
 	"created_at" datetime not null default CURRENT_TIMESTAMP
 );
 
+CREATE TABLE IF NOT EXISTS "waterlevel" (
+	"id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+	"day" DATE NOT NULL,
+	"time" TEXT NOT NULL,
+	"max" INTEGER NOT NULL,
+	"min" INTEGER NOT NULL,
+	"mittel" INTEGER NOT NULL,
+	"tumax" INTEGER NOT NULL,
+	"tumin" INTEGER NOT NULL,
+	"tumittel" INTEGER NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS "weather" (
+	"id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+	"day" DATE NOT NULL,
+	"max_temp" FLOAT NOT NULL,
+	"wind_gust" FLOAT NOT NULL,
+	"rain_mm" FLOAT NOT NULL
+);

src/lib.rs

@@ -8,6 +8,8 @@ pub mod tera;
 #[cfg(feature = "rest")]
 pub mod rest;
 
+pub mod scheduled;
+
 #[cfg(test)]
 #[macro_export]
 macro_rules! testdb {

src/main.rs

@@ -6,6 +6,7 @@ use std::str::FromStr;
 use rot::rest;
 #[cfg(feature = "rowing-tera")]
 use rot::tera;
+use rot::{scheduled, tera::Config};
 
 use sqlx::{pool::PoolOptions, sqlite::SqliteConnectOptions, ConnectOptions};
 
@@ -26,7 +27,7 @@ async fn rocket() -> _ {
         .await
         .unwrap();
 
-    let rocket = rocket::build().manage(db);
+    let rocket = rocket::build().manage(db.clone());
 
     #[cfg(feature = "rowing-tera")]
     let rocket = tera::config(rocket);
@@ -34,5 +35,11 @@ async fn rocket() -> _ {
     #[cfg(feature = "rest")]
     let rocket = rest::config(rocket);
 
+    let config: Config = rocket
+        .figment()
+        .extract()
+        .expect("Config extraction failed");
+    scheduled::schedule(&db, &config);
+
     rocket
 }

src/model/mod.rs

@@ -5,6 +5,8 @@ use sqlx::SqlitePool;
 use self::{
     planned_event::{PlannedEvent, PlannedEventWithUserAndTriptype},
     trip::{Trip, TripWithUserAndType},
+    waterlevel::Waterlevel,
+    weather::Weather,
 };
 
 pub mod boat;
@@ -27,6 +29,8 @@ pub mod tripdetails;
 pub mod triptype;
 pub mod user;
 pub mod usertrip;
+pub mod waterlevel;
+pub mod weather;
 
 #[derive(Serialize, Debug)]
 pub struct Day {
@@ -34,6 +38,8 @@ pub struct Day {
     planned_events: Vec<PlannedEventWithUserAndTriptype>,
     trips: Vec<TripWithUserAndType>,
     is_pinned: bool,
+    max_waterlevel: Option<i64>,
+    weather: Option<Weather>,
 }
 
 impl Day {
@@ -44,6 +50,8 @@ impl Day {
                 planned_events: PlannedEvent::get_pinned_for_day(db, day).await,
                 trips: Trip::get_pinned_for_day(db, day).await,
                 is_pinned,
+                max_waterlevel: Waterlevel::max_waterlevel_for_day(db, day).await,
+                weather: Weather::find_by_day(db, day).await,
             }
         } else {
             Self {
@@ -51,6 +59,8 @@ impl Day {
                 planned_events: PlannedEvent::get_for_day(db, day).await,
                 trips: Trip::get_for_day(db, day).await,
                 is_pinned,
+                max_waterlevel: Waterlevel::max_waterlevel_for_day(db, day).await,
+                weather: Weather::find_by_day(db, day).await,
             }
         }
     }

src/model/waterlevel.rs

@@ -0,0 +1,72 @@
+use std::ops::DerefMut;
+
+use chrono::NaiveDate;
+use rocket::serde::{Deserialize, Serialize};
+use sqlx::{FromRow, Sqlite, SqlitePool, Transaction};
+
+#[derive(FromRow, Debug, Serialize, Deserialize, Eq, Hash, PartialEq, Clone)]
+pub struct Waterlevel {
+    pub id: i64,
+    pub day: NaiveDate,
+    pub time: String,
+    pub max: i64,
+    pub min: i64,
+    pub mittel: i64,
+    pub tumax: i64,
+    pub tumin: i64,
+    pub tumittel: i64,
+}
+
+impl Waterlevel {
+    pub async fn find_by_id(db: &SqlitePool, id: i32) -> Option<Self> {
+        sqlx::query_as!(Self, "SELECT * FROM waterlevel WHERE id like ?", id)
+            .fetch_one(db)
+            .await
+            .ok()
+    }
+    pub async fn find_by_id_tx(db: &mut Transaction<'_, Sqlite>, id: i32) -> Option<Self> {
+        sqlx::query_as!(Self, "SELECT * FROM waterlevel WHERE id like ?", id)
+            .fetch_one(db.deref_mut())
+            .await
+            .ok()
+    }
+
+    pub async fn create(
+        db: &mut Transaction<'_, Sqlite>,
+        day: NaiveDate,
+        time: String,
+        max: i64,
+        min: i64,
+        mittel: i64,
+        tumax: i64,
+        tumin: i64,
+        tumittel: i64,
+    ) -> Result<(), String> {
+        sqlx::query!(
+            "INSERT INTO waterlevel(day, time, max, min, mittel, tumax, tumin, tumittel) VALUES (?,?,?,?,?,?,?,?)",
+            day, time, max, min, mittel, tumax, tumin, tumittel
+        )
+        .execute(db.deref_mut())
+        .await
+        .map_err(|e| e.to_string())?;
+        Ok(())
+    }
+
+    pub async fn max_waterlevel_for_day(db: &SqlitePool, day: NaiveDate) -> Option<i64> {
+        sqlx::query!(
+            "SELECT MAX(mittel) as max FROM waterlevel WHERE day = ?",
+            day
+        )
+        .fetch_one(db)
+        .await
+        .unwrap()
+        .max
+    }
+
+    pub async fn delete_all(db: &mut Transaction<'_, Sqlite>) {
+        sqlx::query!("DELETE FROM waterlevel;")
+            .execute(db.deref_mut())
+            .await
+            .unwrap();
+    }
+}

src/model/weather.rs

@@ -0,0 +1,56 @@
+use std::ops::DerefMut;
+
+use chrono::NaiveDate;
+use rocket::serde::{Deserialize, Serialize};
+use sqlx::{FromRow, Sqlite, SqlitePool, Transaction};
+
+#[derive(FromRow, Debug, Serialize, Deserialize, PartialEq, Clone)]
+pub struct Weather {
+    pub id: i64,
+    pub day: NaiveDate,
+    pub max_temp: f64,
+    pub wind_gust: f64,
+    pub rain_mm: f64,
+}
+
+impl Weather {
+    pub async fn find_by_day(db: &SqlitePool, day: NaiveDate) -> Option<Self> {
+        sqlx::query_as!(Self, "SELECT * FROM weather WHERE day = ?", day)
+            .fetch_one(db)
+            .await
+            .ok()
+    }
+    pub async fn find_by_id_tx(db: &mut Transaction<'_, Sqlite>, day: NaiveDate) -> Option<Self> {
+        sqlx::query_as!(Self, "SELECT * FROM weather WHERE day = ?", day)
+            .fetch_one(db.deref_mut())
+            .await
+            .ok()
+    }
+
+    pub async fn create(
+        db: &mut Transaction<'_, Sqlite>,
+        day: NaiveDate,
+        max_temp: f64,
+        wind_gust: f64,
+        rain_mm: f64,
+    ) -> Result<(), String> {
+        sqlx::query!(
+            "INSERT INTO weather(day, max_temp, wind_gust, rain_mm) VALUES (?,?,?,?)",
+            day,
+            max_temp,
+            wind_gust,
+            rain_mm
+        )
+        .execute(db.deref_mut())
+        .await
+        .map_err(|e| e.to_string())?;
+        Ok(())
+    }
+
+    pub async fn delete_all(db: &mut Transaction<'_, Sqlite>) {
+        sqlx::query!("DELETE FROM weather;")
+            .execute(db.deref_mut())
+            .await
+            .unwrap();
+    }
+}

src/scheduled/mod.rs

@@ -0,0 +1,43 @@
+mod waterlevel;
+mod weather;
+
+use std::time::Duration;
+
+use job_scheduler_ng::{Job, JobScheduler};
+use rocket::tokio::{self, task, time};
+use sqlx::SqlitePool;
+
+use crate::tera::Config;
+
+pub fn schedule(db: &SqlitePool, config: &Config) {
+    let db = db.clone();
+    let openweathermap_key = config.openweathermap_key.clone();
+
+    tokio::task::spawn(async {
+        waterlevel::update(&db).await.unwrap();
+        weather::update(&db, &openweathermap_key).await.unwrap();
+
+        let mut sched = JobScheduler::new();
+
+        // Every hour
+        sched.add(Job::new("0 0 * * * * *".parse().unwrap(), move || {
+            let db_clone = db.clone();
+            // Use block_in_place to run async code in the synchronous function; TODO: Make it
+            // nicer one's rust (stable) support async closures
+            task::block_in_place(|| {
+                tokio::runtime::Handle::current().block_on(async {
+                    waterlevel::update(&db_clone).await.unwrap();
+                    weather::update(&db_clone, &openweathermap_key)
+                        .await
+                        .unwrap();
+                });
+            });
+        }));
+
+        let mut interval = time::interval(Duration::from_secs(60));
+        loop {
+            sched.tick();
+            interval.tick().await;
+        }
+    });
+}

src/scheduled/waterlevel.rs

@@ -0,0 +1,112 @@
+use chrono::{DateTime, FixedOffset, NaiveDate, NaiveTime};
+use serde::{Deserialize, Serialize};
+use sqlx::SqlitePool;
+
+use crate::model::waterlevel::Waterlevel;
+
+pub async fn update(db: &SqlitePool) -> Result<(), String> {
+    let mut tx = db.begin().await.unwrap();
+
+    // 1. Delete water levels starting from yesterday
+    Waterlevel::delete_all(&mut tx).await;
+
+    // 2. Fetch
+    let station = fetch()?;
+    for d in station.data {
+        let (Some(max), Some(min), Some(mittel), Some(tumax), Some(tumin), Some(tumittel)) =
+            (d.max, d.min, d.mittel, d.tumax, d.tumin, d.tumittel)
+        else {
+            println!("Ignored invalid values: {d:?}");
+            continue;
+        };
+
+        let Ok(datetime): Result<DateTime<FixedOffset>, _> = d.timestamp.parse() else {
+            return Err("Failed to parse datetime from hydro json".into());
+        };
+        let date: NaiveDate = datetime.naive_utc().date();
+
+        // Extract time component and format as string
+        let time: NaiveTime = datetime.naive_utc().time();
+        let time_str = time.format("%H:%M").to_string();
+
+        Waterlevel::create(
+            &mut tx, date, time_str, max, min, mittel, tumax, tumin, tumittel,
+        )
+        .await?
+    }
+
+    // 3. Save in DB
+    tx.commit().await.unwrap();
+
+    Ok(())
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct Station {
+    station_no: String,
+    station_latitude: String,
+    station_longitude: String,
+    parametertype_name: String,
+    ts_shortname: String,
+    ts_name: String,
+    ts_unitname: String,
+    ts_unitsymbol: String,
+    ts_precision: String,
+    rows: String,
+    columns: String,
+    data: Vec<Data>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct Data {
+    timestamp: String,
+    max: Option<i64>,
+    min: Option<i64>,
+    mittel: Option<i64>,
+    tumax: Option<i64>,
+    tumin: Option<i64>,
+    tumittel: Option<i64>,
+}
+
+fn fetch() -> Result<Station, String> {
+    let url = "https://hydro.ooe.gv.at/daten/internet/stations/OG/207068/S/forecast.json";
+
+    match ureq::get(url).call() {
+        Ok(response) => {
+            let forecast: Result<Vec<Station>, _> = response.into_json();
+
+            if let Ok(data) = forecast {
+                if data.len() == 1 {
+                    return Ok(data[0].clone());
+                } else {
+                    return Err(format!(
+                        "Expected 1 station (Linz); got {} while fetching from {url}. Maybe the hydro data format changed?",
+                        data.len()
+                    ));
+                }
+            } else {
+                return Err(format!(
+                    "Failed to parse the json received by {url}: {}",
+                    forecast.err().unwrap()
+                ));
+            }
+        }
+        Err(_) => {
+            return Err(format!(
+                "Could not fetch {url}, do you have internet? Maybe their server is down?"
+            ));
+        }
+    }
+}
+
+//#[cfg(test)]
+//mod test {
+//    use crate::testdb;
+//
+//    use super::*;
+//    #[sqlx::test]
+//    fn test_fetch_succ() {
+//        let pool = testdb!();
+//        fetch();
+//    }
+//}

src/scheduled/weather.rs

@@ -0,0 +1,120 @@
+use chrono::DateTime;
+use serde::{Deserialize, Serialize};
+use sqlx::SqlitePool;
+
+use crate::model::weather::Weather;
+
+pub async fn update(db: &SqlitePool, api_key: &str) -> Result<(), String> {
+    let mut tx = db.begin().await.unwrap();
+
+    // 1. Delete weather data
+    Weather::delete_all(&mut tx).await;
+
+    // 2. Fetch
+    let data = fetch(api_key)?;
+    for d in data.daily {
+        let Some(date) = DateTime::from_timestamp(d.dt, 0) else {
+            println!("Skipping {} because convertion to datetime failed", d.dt);
+            continue;
+        };
+        let max_temp = d.temp.max;
+        let wind_gust = d.wind_gust;
+        let rain_mm = d.rain.unwrap_or(0.);
+
+        Weather::create(
+            &mut tx,
+            date.naive_utc().into(),
+            max_temp,
+            wind_gust,
+            rain_mm,
+        )
+        .await?
+    }
+
+    // 3. Save in DB
+    tx.commit().await.unwrap();
+
+    Ok(())
+}
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct Data {
+    lat: f64,
+    lon: f64,
+    timezone: String,
+    timezone_offset: i64,
+    daily: Vec<Daily>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct Daily {
+    dt: i64,
+    sunrise: i64,
+    sunset: i64,
+    moonrise: i64,
+    moonset: i64,
+    moon_phase: f64,
+    summary: String,
+    temp: Temp,
+    feels_like: FeelsLike,
+    pressure: i64,
+    humidity: i64,
+    dew_point: f64,
+    wind_speed: f64,
+    wind_deg: i64,
+    wind_gust: f64,
+    weather: Vec<DailyWeather>,
+    clouds: i64,
+    pop: f64,
+    rain: Option<f64>,
+    uvi: f64,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct Temp {
+    day: f64,
+    min: f64,
+    max: f64,
+    night: f64,
+    eve: f64,
+    morn: f64,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct FeelsLike {
+    day: f64,
+    night: f64,
+    eve: f64,
+    morn: f64,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct DailyWeather {
+    id: i64,
+    main: String,
+    description: String,
+    icon: String,
+}
+
+fn fetch(api_key: &str) -> Result<Data, String> {
+    let url = format!("https://api.openweathermap.org/data/3.0/onecall?lat=48.31970&lon=14.29451&units=metric&exclude=current,minutely,hourly,alert&appid={api_key}");
+
+    match ureq::get(&url).call() {
+        Ok(response) => {
+            let data: Result<Data, _> = response.into_json();
+
+            if let Ok(data) = data {
+                return Ok(data);
+            } else {
+                return Err(format!(
+                    "Failed to parse the json received by {url}: {}",
+                    data.err().unwrap()
+                ));
+            }
+        }
+        Err(_) => {
+            return Err(format!(
+                "Could not fetch {url}, do you have internet? Maybe their server is down?"
+            ));
+        }
+    }
+}

src/tera/mod.rs

@@ -166,6 +166,7 @@ pub struct Config {
     rss_key: String,
     smtp_pw: String,
     usage_log_path: String,
+    pub openweathermap_key: String,
 }
 
 pub fn config(rocket: Rocket<Build>) -> Rocket<Build> {

templates/planned.html.tera

@@ -96,7 +96,13 @@
                 <div>
                     <h2 class="font-bold uppercase tracking-wide text-center rounded-t-md  {% if day.is_pinned %} text-white bg-primary-950 {% else %} text-primary-950 dark:text-white bg-gray-200 dark:bg-primary-950 bg-opacity-80 {% endif %} text-lg px-3 py-3 ">
                         {{ day.day| date(format="%d.%m.%Y") }}
-                        <small class="inline-block ml-1 text-xs {% if day.is_pinned %} text-gray-200 {% else %} text-gray-500 dark:text-gray-100 {% endif %}">{{ day.day | date(format="%A", locale="de_AT") }}</small>
+                        <small class="inline-block ml-1 text-xs {% if day.is_pinned %} text-gray-200 {% else %} text-gray-500 dark:text-gray-100 {% endif %}">{{ day.day | date(format="%A", locale="de_AT") }}
+                            {% if day.max_waterlevel %}
+                                &bullet; <a href="https://hydro.ooe.gv.at/#/overview/Wasserstand/station/16668/Linz/Wasserstand"
+    target="_blank"
+    title="Prognostizierter maximaler Wasserstand am {{ day.day | date(format="%A", locale="de_AT") }}: {{ day.max_waterlevel }} cm">🌊{{ day.max_waterlevel }} cm</a>
+                            {% endif %}
+                        </small>
                     </h2>
                     {% if day.weather %}
                         <div class="bg-gray-300 text-center">