feat(infra): implement list_shows, list_seasons + season_number filter

k-tv-backend/infra/src/library_repository.rs

@@ -272,6 +272,107 @@ impl ILibraryRepository for SqliteLibraryRepository {
         .map_err(|e| DomainError::InfrastructureError(e.to_string()))?;
         Ok(count > 0)
     }
+
+    async fn list_shows(
+        &self,
+        provider_id: Option<&str>,
+        search_term: Option<&str>,
+        genres: &[String],
+    ) -> DomainResult<Vec<ShowSummary>> {
+        let mut conditions = vec![
+            "content_type = 'episode'".to_string(),
+            "series_name IS NOT NULL".to_string(),
+        ];
+        if let Some(p) = provider_id {
+            conditions.push(format!("provider_id = '{}'", p.replace('\'', "''")));
+        }
+        if let Some(st) = search_term {
+            let escaped = st.replace('\'', "''");
+            conditions.push(format!(
+                "(title LIKE '%{escaped}%' OR series_name LIKE '%{escaped}%')"
+            ));
+        }
+        if !genres.is_empty() {
+            let genre_conditions: Vec<String> = genres
+                .iter()
+                .map(|g| format!(
+                    "EXISTS (SELECT 1 FROM json_each(library_items.genres) WHERE value = '{}')",
+                    g.replace('\'', "''")
+                ))
+                .collect();
+            conditions.push(format!("({})", genre_conditions.join(" OR ")));
+        }
+        let where_clause = format!("WHERE {}", conditions.join(" AND "));
+        let sql = format!(
+            "SELECT series_name, COUNT(*) AS episode_count, COUNT(DISTINCT season_number) AS season_count, MAX(thumbnail_url) AS thumbnail_url, GROUP_CONCAT(genres, ',') AS genres_blob FROM library_items {} GROUP BY series_name ORDER BY series_name ASC",
+            where_clause
+        );
+        let rows = sqlx::query_as::<_, ShowSummaryRow>(&sql)
+            .fetch_all(&self.pool)
+            .await
+            .map_err(|e| DomainError::InfrastructureError(e.to_string()))?;
+
+        Ok(rows
+            .into_iter()
+            .map(|r| {
+                let genres: Vec<String> = r
+                    .genres_blob
+                    .split("],[")
+                    .flat_map(|chunk| {
+                        let cleaned = chunk.trim_start_matches('[').trim_end_matches(']');
+                        cleaned
+                            .split(',')
+                            .filter_map(|s| {
+                                let s = s.trim().trim_matches('"');
+                                if s.is_empty() { None } else { Some(s.to_string()) }
+                            })
+                            .collect::<Vec<_>>()
+                    })
+                    .collect::<std::collections::HashSet<_>>()
+                    .into_iter()
+                    .collect();
+                ShowSummary {
+                    series_name: r.series_name,
+                    episode_count: r.episode_count as u32,
+                    season_count: r.season_count as u32,
+                    thumbnail_url: r.thumbnail_url,
+                    genres,
+                }
+            })
+            .collect())
+    }
+
+    async fn list_seasons(
+        &self,
+        series_name: &str,
+        provider_id: Option<&str>,
+    ) -> DomainResult<Vec<SeasonSummary>> {
+        let mut conditions = vec![
+            format!("series_name = '{}'", series_name.replace('\'', "''")),
+            "content_type = 'episode'".to_string(),
+        ];
+        if let Some(p) = provider_id {
+            conditions.push(format!("provider_id = '{}'", p.replace('\'', "''")));
+        }
+        let where_clause = format!("WHERE {}", conditions.join(" AND "));
+        let sql = format!(
+            "SELECT season_number, COUNT(*) AS episode_count, MAX(thumbnail_url) AS thumbnail_url FROM library_items {} GROUP BY season_number ORDER BY season_number ASC",
+            where_clause
+        );
+        let rows = sqlx::query_as::<_, SeasonSummaryRow>(&sql)
+            .fetch_all(&self.pool)
+            .await
+            .map_err(|e| DomainError::InfrastructureError(e.to_string()))?;
+
+        Ok(rows
+            .into_iter()
+            .map(|r| SeasonSummary {
+                season_number: r.season_number as u32,
+                episode_count: r.episode_count as u32,
+                thumbnail_url: r.thumbnail_url,
+            })
+            .collect())
+    }
 }
 
 // ── SQLx row types ─────────────────────────────────────────────────────────
@@ -311,6 +412,22 @@ struct SyncLogRow {
     items_found: i64, status: String, error_msg: Option<String>,
 }
 
+#[derive(sqlx::FromRow)]
+struct ShowSummaryRow {
+    series_name: String,
+    episode_count: i64,
+    season_count: i64,
+    thumbnail_url: Option<String>,
+    genres_blob: String,
+}
+
+#[derive(sqlx::FromRow)]
+struct SeasonSummaryRow {
+    season_number: i64,
+    episode_count: i64,
+    thumbnail_url: Option<String>,
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

k-tv-backend/infra/src/library_sync.rs

@@ -209,6 +209,8 @@ mod tests {
         async fn log_sync_finish(&self, _id: i64, _r: &LibrarySyncResult) -> DomainResult<()> { Ok(()) }
         async fn latest_sync_status(&self) -> DomainResult<Vec<LibrarySyncLogEntry>> { Ok(vec![]) }
         async fn is_sync_running(&self, _pid: &str) -> DomainResult<bool> { Ok(false) }
+        async fn list_shows(&self, _p: Option<&str>, _st: Option<&str>, _g: &[String]) -> DomainResult<Vec<domain::ShowSummary>> { Ok(vec![]) }
+        async fn list_seasons(&self, _sn: &str, _p: Option<&str>) -> DomainResult<Vec<domain::SeasonSummary>> { Ok(vec![]) }
     }
 
     #[tokio::test]