various: simplify code; work on security and performance

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I9a5114addcab5fbff430ab2b919b83466a6a6964

crates/pinakes-core/src/playlists.rs

@@ -0,0 +1,31 @@
+//! Playlist management: ordered collections of media items.
+
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::model::MediaId;
+use crate::users::UserId;
+
+/// A user-owned playlist of media items.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Playlist {
+    pub id: Uuid,
+    pub owner_id: UserId,
+    pub name: String,
+    pub description: Option<String>,
+    pub is_public: bool,
+    pub is_smart: bool,
+    pub filter_query: Option<String>,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+/// An item within a playlist at a specific position.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PlaylistItem {
+    pub playlist_id: Uuid,
+    pub media_id: MediaId,
+    pub position: i32,
+    pub added_at: DateTime<Utc>,
+}