Initial version of weather microservice

microservices/weather/src/fetch.rs

@@ -0,0 +1,62 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct WeatherResponse {
+    pub id: usize,
+    pub weather: Vec<Weather>,
+    pub wind: Wind,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Weather {
+    pub id: usize,
+    pub main: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Wind {
+    pub speed: f32,
+}
+
+fn construct_weather_data_url(
+    base_url: &str,
+    latitude: &str,
+    longitude: &str,
+    api_key: &str,
+    current_datetime: &DateTime<Utc>,
+) -> String {
+    format!(
+        "{}?lat={}&lon={}&dt={}&appid={}",
+        base_url, latitude, longitude, current_datetime.timestamp(), api_key
+    )
+}
+
+pub async fn fetch_weather_data(
+    base_url: &str,
+    latitude: &str,
+    longitude: &str,
+    api_key: &str,
+    current_datetime: &DateTime<Utc>,
+) -> Result<WeatherResponse, reqwest::Error> {
+    let url = construct_weather_data_url(base_url, latitude, longitude, api_key, current_datetime);
+    reqwest::get(url).await?.json().await
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use chrono::prelude::*;
+
+    #[test]
+    fn should_construct_url() {
+        let result = construct_weather_data_url(
+            "http://test",
+            "1.14",
+            "1.12",
+            "abc",
+            &Utc.with_ymd_and_hms(2023, 1, 2, 1, 0, 0).unwrap(),
+        );
+        assert_eq!("http://test?lat=1.14&lon=1.12&dt=1672621200&appid=abc", result);
+    }
+}