feat: implement album sharing functionality with permissions management

libertas_core/src/repositories.rs

@@ -3,7 +3,7 @@ use uuid::Uuid;
 
 use crate::{
     error::CoreResult,
-    models::{Album, Media, User},
+    models::{Album, AlbumPermission, Media, User},
 };
 
 #[async_trait]
@@ -37,3 +37,21 @@ pub trait AlbumRepository: Send + Sync {
     async fn list_by_user(&self, user_id: Uuid) -> CoreResult<Vec<Album>>;
     async fn add_media_to_album(&self, album_id: Uuid, media_ids: &[Uuid]) -> CoreResult<()>;
 }
+
+#[async_trait]
+pub trait AlbumShareRepository: Send + Sync {
+    async fn create_or_update_share(
+        &self,
+        album_id: Uuid,
+        user_id: Uuid,
+        permission: AlbumPermission,
+    ) -> CoreResult<()>;
+
+    async fn get_user_permission(
+        &self,
+        album_id: Uuid,
+        user_id: Uuid,
+    ) -> CoreResult<Option<AlbumPermission>>;
+
+    async fn is_media_in_shared_album(&self, media_id: Uuid, user_id: Uuid) -> CoreResult<bool>;
+}