Add MPRIS support (#25)

* Stop mpv on app close for linux/macOS (#20)

* Add initial MPRIS support

* Fix mpv path check

src/main/preload/mpris.ts

@@ -0,0 +1,70 @@
+import { IpcRendererEvent, ipcRenderer } from 'electron';
+import { QueueSong } from '/@/renderer/api/types';
+
+const updateSong = (args: { currentTime: number; song: QueueSong }) => {
+  ipcRenderer.send('mpris-update-song', args);
+};
+
+const updatePosition = (timeSec: number) => {
+  ipcRenderer.send('mpris-update-position', timeSec);
+};
+
+const updateSeek = (timeSec: number) => {
+  ipcRenderer.send('mpris-update-seek', timeSec);
+};
+
+const updateVolume = (volume: number) => {
+  ipcRenderer.send('mpris-update-volume', volume);
+};
+
+const updateRepeat = (repeat: string) => {
+  ipcRenderer.send('mpris-update-repeat', repeat);
+};
+
+const updateShuffle = (shuffle: boolean) => {
+  ipcRenderer.send('mpris-update-shuffle', shuffle);
+};
+
+const toggleRepeat = () => {
+  ipcRenderer.send('mpris-toggle-repeat');
+};
+
+const toggleShuffle = () => {
+  ipcRenderer.send('mpris-toggle-shuffle');
+};
+
+const requestPosition = (cb: (event: IpcRendererEvent, data: { position: number }) => void) => {
+  ipcRenderer.on('mpris-request-position', cb);
+};
+
+const requestSeek = (cb: (event: IpcRendererEvent, data: { offset: number }) => void) => {
+  ipcRenderer.on('mpris-request-seek', cb);
+};
+
+const requestVolume = (cb: (event: IpcRendererEvent, data: { volume: number }) => void) => {
+  ipcRenderer.on('mpris-request-volume', cb);
+};
+
+const requestToggleRepeat = (cb: (event: IpcRendererEvent) => void) => {
+  ipcRenderer.on('mpris-request-toggle-repeat', cb);
+};
+
+const requestToggleShuffle = (cb: (event: IpcRendererEvent) => void) => {
+  ipcRenderer.on('mpris-request-toggle-shuffle', cb);
+};
+
+export const mpris = {
+  requestPosition,
+  requestSeek,
+  requestToggleRepeat,
+  requestToggleShuffle,
+  requestVolume,
+  toggleRepeat,
+  toggleShuffle,
+  updatePosition,
+  updateRepeat,
+  updateSeek,
+  updateShuffle,
+  updateSong,
+  updateVolume,
+};

src/main/preload/utils.ts

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+import { isMacOS, isWindows, isLinux } from '../utils';
+
+export const utils = {
+  isLinux,
+  isMacOS,
+  isWindows,
+};