Refactor some generic components

src/utility/usePlayTrack.ts

@@ -0,0 +1,36 @@
+import { useCallback } from 'react';
+import TrackPlayer from 'react-native-track-player';
+import { useTypedSelector } from 'store';
+import { generateTrack } from './JellyfinApi';
+import useQueue from './useQueue';
+
+/**
+ * A hook that generates a callback that can setup and start playing a
+ * particular trackId in the player.
+ */
+export default function usePlayTrack() {
+    const credentials = useTypedSelector(state => state.settings.jellyfin);
+    const tracks = useTypedSelector(state => state.music.tracks.entities);
+    const queue = useQueue();
+
+    return useCallback(async function playTrack(trackId: string) {
+        // Get the relevant track
+        const track = tracks[trackId];
+
+        // GUARD: Check if the track actually exists in the store
+        if (!track) {
+            return;
+        }
+
+        // GUARD: Check if the track is already in the queue
+        if (!queue?.some((t) => t.id === trackId)) {
+            // If it is not, we must then generate it, and add it to the queue
+            const newTrack = generateTrack(track, credentials);
+            await TrackPlayer.add([ newTrack ]);
+        }
+
+        // Then we'll skip to it and play it
+        await TrackPlayer.skip(trackId);
+        TrackPlayer.play();
+    }, [credentials, tracks]);
+}