feat: favorite actors top-5 stat in profile trends

crates/adapters/postgres/src/models.rs

@@ -275,3 +275,12 @@ pub(crate) struct WatchMediumCountRow {
     pub watch_medium: String,
     pub count: i64,
 }
+
+#[derive(sqlx::FromRow)]
+pub(crate) struct ActorAppearanceRow {
+    pub tmdb_person_id: i64,
+    pub name: String,
+    pub profile_path: Option<String>,
+    pub billing_order: i32,
+    pub movie_id: String,
+}

crates/adapters/postgres/src/stats.rs

@@ -1,15 +1,17 @@
 use async_trait::async_trait;
 use domain::{
     errors::DomainError,
-    models::{DirectorStat, MonthlyRating, UserStats, UserTrends},
+    models::{
+        ActorAppearance, DirectorStat, MonthlyRating, UserStats, UserTrends, compute_top_actors,
+    },
     ports::StatsRepository,
     value_objects::UserId,
 };
 use sqlx::PgPool;
 
 use crate::models::{
-    DirectorCountRow, GenreCountRow, MonthlyRatingRow, RatingDistRow, UserTotalsRow,
-    WatchMediumCountRow,
+    ActorAppearanceRow, DirectorCountRow, GenreCountRow, MonthlyRatingRow, RatingDistRow,
+    UserTotalsRow, WatchMediumCountRow,
 };
 use adapter_common::format_year_month;
 
@@ -100,7 +102,7 @@ impl StatsRepository for PostgresStatsRepository {
     async fn get_user_trends(&self, user_id: &UserId) -> Result<UserTrends, DomainError> {
         let uid = user_id.value().to_string();
 
-        let (rating_rows, director_rows, genre_rows, rating_dist_rows, medium_rows) =
+        let (rating_rows, director_rows, genre_rows, rating_dist_rows, medium_rows, actor_rows) =
             tokio::try_join!(
                 sqlx::query_as::<_, MonthlyRatingRow>(
                     "SELECT to_char(watched_at AT TIME ZONE 'UTC', 'YYYY-MM') AS month,
@@ -152,6 +154,16 @@ impl StatsRepository for PostgresStatsRepository {
                  ORDER BY COUNT(*) DESC"
                 )
                 .bind(&uid)
+                .fetch_all(&self.pool),
+                sqlx::query_as::<_, ActorAppearanceRow>(
+                    "SELECT mc.tmdb_person_id, mc.name, mc.profile_path,
+                            mc.billing_order, mc.movie_id
+                     FROM reviews r
+                     INNER JOIN movie_cast mc ON mc.movie_id = r.movie_id
+                     WHERE r.user_id = $1
+                     GROUP BY mc.tmdb_person_id, mc.movie_id, mc.name, mc.profile_path, mc.billing_order"
+                )
+                .bind(&uid)
                 .fetch_all(&self.pool)
             )
             .map_err(adapter_common::map_sqlx_error)?;
@@ -201,6 +213,19 @@ impl StatsRepository for PostgresStatsRepository {
             })
             .collect();
 
+        let top_actors = compute_top_actors(
+            actor_rows
+                .into_iter()
+                .map(|r| ActorAppearance {
+                    tmdb_person_id: r.tmdb_person_id as u64,
+                    name: r.name,
+                    profile_path: r.profile_path,
+                    billing_order: r.billing_order as u32,
+                    movie_id: r.movie_id,
+                })
+                .collect(),
+        );
+
         Ok(UserTrends {
             monthly_ratings,
             top_directors,
@@ -208,6 +233,7 @@ impl StatsRepository for PostgresStatsRepository {
             top_genres,
             rating_distribution,
             watch_medium_distribution,
+            top_actors,
         })
     }
 }