feat(api): reject empty episode titles

crates/arr-api/src/series.rs

@@ -721,6 +721,15 @@ pub async fn create_season(
             "episode number cannot be negative".into(),
         ));
     }
+    // The column rejects the empty string (#153); say so before the database
+    // has to.
+    if input
+        .episodes
+        .iter()
+        .any(|episode| episode.title.trim().is_empty())
+    {
+        return Err(ApiError::Invalid("episode title cannot be empty".into()));
+    }
     let mut numbers: Vec<i64> = input
         .episodes
         .iter()
@@ -1394,6 +1403,28 @@ mod tests {
         assert_eq!(season["episodes"][0]["wanted"], false);
     }
 
+    /// #153. An empty episode title is rejected up front — the column and the
+    /// TMDB boundary both refuse it, so the API must too.
+    #[tokio::test]
+    async fn an_empty_episode_title_is_rejected() {
+        let (_dir, state, base) = application().await;
+        let root_id = tv_root(&state, "main").await;
+        let series = add_series(&base, root_id, false).await;
+        let series_id = series["id"].as_i64().expect("id");
+
+        for title in ["", "   "] {
+            let response = reqwest::Client::new()
+                .post(format!("{base}/api/series/{series_id}/seasons"))
+                .json(&serde_json::json!({"number": 1, "episodes": [
+                    {"number": 1, "title": title}
+                ]}))
+                .send()
+                .await
+                .expect("create season");
+            assert_eq!(response.status(), StatusCode::UNPROCESSABLE_ENTITY);
+        }
+    }
+
     #[tokio::test]
     async fn a_rejected_season_leaves_nothing_behind_to_retry_over() {
         let (_dir, state, base) = application().await;

crates/arr-meta/src/lib.rs

@@ -24,6 +24,6 @@ mod model;
 pub use client::{TmdbClient, TmdbClientBuilder, DEFAULT_BASE_URL, DEFAULT_CACHE_TTL};
 pub use error::{Error, Result};
 pub use model::{
-    Episode, ExternalIds, FindResults, Movie, MovieSearchResult, Season, Series, SeriesSearchResult,
+    Episode, ExternalIds, FindResults, Movie, MovieSearchResult, Season, Series,
-    UNTITLED_EPISODE,
+    SeriesSearchResult, UNTITLED_EPISODE,
 };