restructure + first tests

src/fetch/broadcast.rs

@@ -0,0 +1,73 @@
+use crate::Backend;
+use chrono::DateTime;
+use serde_json::Value;
+
+impl Backend {
+    pub(crate) async fn get_broadcast(
+        &self,
+        url: String,
+    ) -> Result<Option<Broadcast>, Box<dyn std::error::Error>> {
+        let data: Value = match self {
+            Backend::Prod => reqwest::get(&url).await?.json().await?,
+            #[cfg(test)]
+            Backend::Test => todo!(),
+        };
+        Broadcast::from_data(url, data).await
+    }
+}
+
+#[derive(Clone)]
+pub(crate) struct Broadcast {
+    pub(crate) url: String,
+    pub(crate) media_url: String,
+    pub(crate) title: String,
+    pub(crate) timestamp: DateTime<chrono::Utc>,
+}
+
+impl Broadcast {
+    async fn from_data(
+        url: String,
+        data: Value,
+    ) -> Result<Option<Self>, Box<dyn std::error::Error>> {
+        let Some(streams) = data["streams"].as_array() else {
+            return Err(String::from("No 'streams' found").into());
+        };
+        if streams.is_empty() {
+            return Ok(None);
+        }
+        assert_eq!(streams.len(), 1);
+
+        let Some(id) = streams[0]["loopStreamId"].as_str() else {
+            return Err(String::from("No 'loopStreamId' found").into());
+        };
+        let media_url = format!("https://loopstream01.apa.at/?channel=oe1&shoutcast=0&id={id}");
+
+        let Some(title) = data["title"].as_str() else {
+            return Err(format!("{url} has no title").into());
+        };
+
+        let Some(timestamp) = data["start"].as_number() else {
+            return Err(format!("{url} has no start").into());
+        };
+        let Some(timestamp) = DateTime::from_timestamp(timestamp.as_i64().unwrap() / 1000, 0)
+        else {
+            return Err(format!(
+                "broadcastDay in {url} not in a valid format (unix timestamp): {timestamp}"
+            )
+            .into());
+        };
+
+        Ok(Some(Self {
+            url,
+            media_url,
+            title: title.into(),
+            timestamp,
+        }))
+    }
+}
+
+impl PartialEq for Broadcast {
+    fn eq(&self, other: &Self) -> bool {
+        self.url == other.url
+    }
+}

src/fetch/mod.rs

@@ -0,0 +1,2 @@
+pub(super) mod broadcast;
+pub(super) mod overview;

src/fetch/overview.rs

@@ -0,0 +1,95 @@
+use crate::Backend;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+struct InferenceResponse {
+    pub title: String,
+    pub href: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct InferenceDay {
+    pub broadcasts: Vec<InferenceResponse>,
+}
+
+type InferenceData = Vec<InferenceDay>;
+
+impl Backend {
+    /// Gets a list of all broadcasts
+    pub(crate) async fn get_broadcasts(
+        &self,
+        filter_titles: &[String],
+    ) -> Result<Vec<String>, Box<dyn std::error::Error>> {
+        let data: InferenceData = match self {
+            Backend::Prod => {
+                let url = "https://audioapi.orf.at/oe1/api/json/current/broadcasts";
+                reqwest::get(url).await?.json::<InferenceData>().await?
+            }
+            #[cfg(test)]
+            Backend::Test => {
+                vec![InferenceDay {
+                    broadcasts: vec![InferenceResponse {
+                        title: "test-title".into(),
+                        href: "test-href".into(),
+                    }],
+                }]
+            }
+        };
+        get_broadcasts(data, filter_titles).await
+    }
+}
+
+/// Returns a list of urls of all filtered broadcasts.
+async fn get_broadcasts(
+    days: InferenceData,
+    filter_titles: &[String],
+) -> Result<Vec<String>, Box<dyn std::error::Error>> {
+    let mut ret: Vec<String> = Vec::new();
+
+    for day in days {
+        for broadcast in day.broadcasts {
+            if filter_titles.is_empty() || filter_titles.contains(&broadcast.title) {
+                {
+                    ret.push(broadcast.href);
+                }
+            }
+        }
+    }
+
+    Ok(ret)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::Backend;
+
+    #[tokio::test]
+    async fn happy() {
+        let backend = Backend::Test;
+        let actual = backend.get_broadcasts(&[]).await.unwrap();
+        assert_eq!(actual, vec!["test-href"]);
+    }
+
+    #[ignore]
+    #[tokio::test]
+    async fn happy_prod() {
+        let backend = Backend::Prod;
+        let actual = backend.get_broadcasts(&[]).await.unwrap();
+        assert!(actual.len() > 200);
+        assert!(actual[0].starts_with("https://audioapi.orf.at/oe1/api/json/4.0/broadcast/"))
+    }
+
+    #[tokio::test]
+    async fn filter_no_result() {
+        let backend = Backend::Test;
+        let actual = backend.get_broadcasts(&["no-match".into()]).await.unwrap();
+        assert!(actual.is_empty());
+    }
+
+    #[tokio::test]
+    async fn filter_result() {
+        let backend = Backend::Test;
+        let actual = backend.get_broadcasts(&["test-href".into()]).await.unwrap();
+        assert_eq!(actual, vec!["test-href"]);
+    }
+}