fix: file/identities — replace NULL first/last_appearance with actual start_frame/end_frame + start_time/end_time + fps

src/api/identity_api.rs

@@ -170,6 +170,7 @@ async fn get_file_detail(
 pub struct FileIdentitiesResponse {
     pub success: bool,
     pub file_uuid: String,
+    pub fps: f64,
     pub total: i64,
     pub page: usize,
     pub page_size: usize,
@@ -183,8 +184,10 @@ pub struct FileIdentityItem {
     pub metadata: serde_json::Value,
     pub face_count: Option<i32>,
     pub speaker_count: Option<i32>,
-    pub first_appearance: Option<f64>,
-    pub last_appearance: Option<f64>,
+    pub start_frame: Option<i32>,
+    pub end_frame: Option<i32>,
+    pub start_time: Option<f64>,
+    pub end_time: Option<f64>,
     pub confidence: Option<f64>,
 }
 
@@ -203,6 +206,7 @@ async fn get_file_identities(
         .await
         .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?;
 
+    let fps = records.first().map(|r| r.fps).unwrap_or(25.0);
     let data: Vec<FileIdentityItem> = records
         .into_iter()
         .map(|r| FileIdentityItem {
@@ -211,8 +215,10 @@ async fn get_file_identities(
             metadata: r.metadata,
             face_count: r.face_count,
             speaker_count: r.speaker_count,
-            first_appearance: r.first_appearance,
-            last_appearance: r.last_appearance,
+            start_frame: r.start_frame,
+            end_frame: r.end_frame,
+            start_time: r.start_frame.map(|sf| sf as f64 / r.fps),
+            end_time: r.end_frame.map(|ef| ef as f64 / r.fps),
             confidence: r.confidence,
         })
         .collect();
@@ -220,6 +226,7 @@ async fn get_file_identities(
     Ok(Json(FileIdentitiesResponse {
         success: true,
         file_uuid: file_uuid,
+        fps,
         total: data.len() as i64,
         page,
         page_size,

src/core/db/postgres_db.rs

@@ -57,16 +57,15 @@ pub struct CandidateRecord {
 
 #[derive(Debug, Clone, Serialize, Deserialize, sqlx::FromRow)]
 pub struct FileIdentityRecord {
-    pub id: i32,
-    pub file_uuid: String,
     pub identity_id: i32,
     pub name: String,
     pub metadata: serde_json::Value,
     pub face_count: Option<i32>,
     pub speaker_count: Option<i32>,
-    pub first_appearance: Option<f64>,
-    pub last_appearance: Option<f64>,
+    pub start_frame: Option<i32>,
+    pub end_frame: Option<i32>,
     pub confidence: Option<f64>,
+    pub fps: f64,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, sqlx::FromRow)]
@@ -2402,22 +2401,29 @@ impl PostgresDb {
         limit: i32,
         offset: i64,
     ) -> Result<Vec<FileIdentityRecord>> {
-        let query = r#"
-            SELECT 0 as id, fd.file_uuid, fd.identity_id::int4, i.name, i.metadata,
+        let table = schema::table_name("face_detections");
+        let ident_table = schema::table_name("identities");
+        let videos_table = schema::table_name("videos");
+        let query = format!(
+            r#"
+            SELECT fd.identity_id::int4, i.name, i.metadata,
                    COUNT(*)::int4 as face_count,
                    0::int4 as speaker_count,
-                   NULL::float8 as first_appearance,
-                   NULL::float8 as last_appearance,
-                   AVG(fd.confidence)::float8 as confidence
-            FROM face_detections fd
-            JOIN identities i ON fd.identity_id = i.id
+                   MIN(fd.frame_number) as start_frame,
+                   MAX(fd.frame_number) as end_frame,
+                   AVG(fd.confidence)::float8 as confidence,
+                   (SELECT COALESCE(fps, 24.0) FROM {} WHERE file_uuid = $1)::float8 as fps
+            FROM {} fd
+            JOIN {} i ON fd.identity_id = i.id
             WHERE fd.file_uuid = $1 AND fd.identity_id IS NOT NULL
-            GROUP BY fd.file_uuid, fd.identity_id, i.name, i.metadata
+            GROUP BY fd.identity_id, i.name, i.metadata
             ORDER BY confidence DESC
             LIMIT $2 OFFSET $3
-        "#;
+            "#,
+            videos_table, table, ident_table
+        );
 
-        let rows = sqlx::query_as(query)
+        let rows = sqlx::query_as(&query)
             .bind(file_uuid)
             .bind(limit)
             .bind(offset)