fix(meta,api): detail ratings are optional too

crates/arr-api/src/metadata.rs

@@ -46,7 +46,8 @@ pub struct MovieMetadata {
     pub status: String,
     pub poster_path: Option<String>,
     pub backdrop_path: Option<String>,
-    pub vote_average: f64,
+    /// Absent when TMDB has no votes for the title (#156).
+    pub vote_average: Option<f64>,
     pub vote_count: u32,
     pub homepage: Option<String>,
     /// §9.6 links out to `IMDb` for movies.
@@ -68,7 +69,8 @@ pub struct SeriesMetadata {
     pub status: String,
     pub poster_path: Option<String>,
     pub backdrop_path: Option<String>,
-    pub vote_average: f64,
+    /// Absent when TMDB has no votes for the title (#156).
+    pub vote_average: Option<f64>,
     pub vote_count: u32,
     pub homepage: Option<String>,
     /// §9.6 links out to TVDB for series.

crates/arr-meta/src/model.rs

@@ -223,7 +223,10 @@ pub struct MovieDetail {
     pub genres: Vec<Genre>,
     pub backdrop_path: Option<String>,
     pub poster_path: Option<String>,
-    pub vote_average: f64,
+    /// Zero normalised away, like [`Movie::vote_average`]: TMDB sends `0`
+    /// where "no votes yet" is meant, and a detail page must not show it as
+    /// a rating.
+    pub vote_average: Option<f64>,
     pub vote_count: u32,
     pub homepage: Option<String>,
     pub status: String,
@@ -244,7 +247,10 @@ pub struct SeriesDetail {
     pub genres: Vec<Genre>,
     pub backdrop_path: Option<String>,
     pub poster_path: Option<String>,
-    pub vote_average: f64,
+    /// Zero normalised away, like [`Movie::vote_average`]: TMDB sends `0`
+    /// where "no votes yet" is meant, and a detail page must not show it as
+    /// a rating.
+    pub vote_average: Option<f64>,
     pub vote_count: u32,
     pub homepage: Option<String>,
     pub status: String,
@@ -771,7 +777,7 @@ impl From<RawMovieDetail> for MovieDetail {
                 .collect(),
             backdrop_path: non_empty(raw.backdrop_path),
             poster_path: non_empty(raw.poster_path),
-            vote_average: raw.vote_average,
+            vote_average: rating(raw.vote_average),
             vote_count: raw.vote_count,
             homepage: non_empty(raw.homepage),
             status: raw.status,
@@ -799,7 +805,7 @@ impl From<RawSeriesDetail> for SeriesDetail {
                 .collect(),
             backdrop_path: non_empty(raw.backdrop_path),
             poster_path: non_empty(raw.poster_path),
-            vote_average: raw.vote_average,
+            vote_average: rating(raw.vote_average),
             vote_count: raw.vote_count,
             homepage: non_empty(raw.homepage),
             status: raw.status,

crates/arr-meta/tests/tmdb.rs

@@ -613,7 +613,7 @@ async fn movie_detail_parses_the_rich_fields() {
     assert_eq!(movie.genres[0].name, "Science Fiction");
     assert!(movie.poster_path.is_some());
     assert!(movie.backdrop_path.is_some());
-    assert!((movie.vote_average - 8.152).abs() < f64::EPSILON);
+    assert!((movie.vote_average.expect("rated") - 8.152).abs() < f64::EPSILON);
     assert_eq!(movie.vote_count, 6_249);
     assert_eq!(movie.homepage.as_deref(), Some("https://www.dunemovie.com"));
     assert_eq!(movie.status, "Released");