feat: Implement pagination for user media retrieval and update related structures

libertas_core/src/repositories.rs

@@ -19,7 +19,7 @@ pub trait MediaRepository: Send + Sync {
         &self,
         user_id: Uuid,
         options: &ListMediaOptions,
-    ) -> CoreResult<Vec<Media>>;
+    ) -> CoreResult<(Vec<Media>, i64)>;
     async fn update_thumbnail_path(&self, id: Uuid, thumbnail_path: String) -> CoreResult<()>;
     async fn delete(&self, id: Uuid) -> CoreResult<()>;
 }

libertas_core/src/schema.rs

@@ -87,3 +87,37 @@ pub struct MediaImportBundle {
     pub metadata_models: Vec<MediaMetadata>,
     pub file_size: i64,
 }
+
+#[derive(Debug, Clone)]
+pub struct PaginatedResponse<T> {
+    pub data: Vec<T>,
+    pub page: u32,
+    pub limit: u32,
+    pub total_items: i64,
+    pub total_pages: u32,
+    pub has_next_page: bool,
+    pub has_prev_page: bool,
+}
+
+impl<T> PaginatedResponse<T> {
+    pub fn new(data: Vec<T>, page: u32, limit: u32, total_items: i64) -> Self {
+        let total_pages = if limit == 0 {
+            0
+        } else {
+            (total_items as f64 / limit as f64).ceil() as u32
+        };
+
+        let has_next_page = page < total_pages;
+        let has_prev_page = page > 1;
+
+        Self {
+            data,
+            page,
+            limit,
+            total_items,
+            total_pages,
+            has_next_page,
+            has_prev_page,
+        }
+    }
+}

libertas_core/src/services.rs

@@ -10,7 +10,7 @@ use crate::{
     },
     schema::{
         AddMediaToAlbumData, CreateAlbumData, CreateUserData, ListMediaOptions, LoginUserData,
-        ShareAlbumData, UpdateAlbumData, UploadMediaData,
+        PaginatedResponse, ShareAlbumData, UpdateAlbumData, UploadMediaData,
     },
 };
 
@@ -22,7 +22,7 @@ pub trait MediaService: Send + Sync {
         &self,
         user_id: Uuid,
         options: ListMediaOptions,
-    ) -> CoreResult<Vec<Media>>;
+    ) -> CoreResult<PaginatedResponse<Media>>;
     async fn get_media_filepath(&self, id: Uuid, user_id: Option<Uuid>) -> CoreResult<String>;
     async fn get_media_thumbnail_path(&self, id: Uuid, user_id: Option<Uuid>)
     -> CoreResult<String>;