fix: refactor JellyfinApi to be less burdensome to implement

Also, automatically catch errors

src/utility/JellyfinApi/playback.ts

@@ -0,0 +1,60 @@
+import TrackPlayer, { RepeatMode, State, Track } from 'react-native-track-player';
+import { fetchApi } from './lib';
+
+/**
+ * This maps the react-native-track-player RepeatMode to a RepeatMode that is
+ * expected by Jellyfin when reporting playback events.
+ */
+const RepeatModeMap: Record<RepeatMode, string> = {
+    [RepeatMode.Off]: 'RepeatNone',
+    [RepeatMode.Track]: 'RepeatOne',
+    [RepeatMode.Queue]: 'RepeatAll',
+};
+
+/**
+ * This will generate the payload that is required for playback events and send
+ * it to the supplied path.
+ */
+export async function sendPlaybackEvent(
+    path: string,
+    track?: Track
+) {
+    // Extract all data from react-native-track-player
+    const [
+        activeTrack, { position }, repeatMode, volume, { state },
+    ] = await Promise.all([
+        track || TrackPlayer.getActiveTrack(),
+        TrackPlayer.getProgress(),
+        TrackPlayer.getRepeatMode(),
+        TrackPlayer.getVolume(),
+        TrackPlayer.getPlaybackState(),
+    ]);
+
+    // Generate a payload from the gathered data
+    const payload = {
+        VolumeLevel: volume * 100,
+        IsMuted: false,
+        IsPaused: state === State.Paused,
+        RepeatMode: RepeatModeMap[repeatMode],
+        ShuffleMode: 'Sorted',
+        PositionTicks: Math.round(position * 10_000_000),
+        PlaybackRate: 1,
+        PlayMethod: 'transcode',
+        MediaSourceId: activeTrack?.backendId || null,
+        ItemId: activeTrack?.backendId || null,
+        CanSeek: true,
+        PlaybackStartTimeTicks: null,
+    };
+
+    // Generate a config from the credentials and dispatch the request
+    await fetchApi(path, { 
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json'
+        },
+        body: JSON.stringify(payload),
+    // Swallow and errors from the request
+    }).catch((err) => {
+        console.error(err);
+    });
+}