drag and drop init

src/lib/player/store.svelte.ts

@@ -216,6 +216,28 @@ class PlayerStore {
 		}
 	}
 
+	move(fromIdx: number, toIdx: number) {
+		if (fromIdx === toIdx) return;
+
+		if (this.isShuffled) {
+			const indices = [...this.shuffledIndices];
+			if (fromIdx < 0 || fromIdx >= indices.length) return;
+			if (toIdx < 0 || toIdx >= indices.length) return;
+
+			const [item] = indices.splice(fromIdx, 1);
+			indices.splice(toIdx, 0, item);
+			this.shuffledIndices = indices;
+		} else {
+			const q = [...this.queue];
+			if (fromIdx < 0 || fromIdx >= q.length) return;
+			if (toIdx < 0 || toIdx >= q.length) return;
+
+			const [item] = q.splice(fromIdx, 1);
+			q.splice(toIdx, 0, item);
+			this.queue = q;
+		}
+	}
+
 	// Playback Controls
 
 	next() {