up

electron/audio-output.ts

@@ -0,0 +1,52 @@
+import type { AudioOutputInfo } from '../src/types/screen.js'
+
+export class AudioOutput {
+  devices: AudioOutputInfo[] = []
+  notice = ''
+  private pending: Promise<unknown> = Promise.resolve()
+  constructor(
+    public selected: string,
+    private enumerate: () => Promise<AudioOutputInfo[]>,
+    private apply: (id: string) => Promise<void>,
+    private save: (id: string) => void,
+  ) {}
+  private enqueue<T>(operation: () => Promise<T>): Promise<T> {
+    const result = this.pending.then(operation)
+    this.pending = result.catch(() => {})
+    return result
+  }
+  refresh() {
+    return this.enqueue(async () => {
+      this.devices = await this.enumerate()
+      if (this.selected && !this.devices.some((device) => device.id === this.selected)) {
+        await this.apply('')
+        this.selected = ''
+        this.notice = 'Устройство звука отключено. Используется устройство по умолчанию в системе.'
+        this.save('')
+      }
+    })
+  }
+  select(id: unknown) {
+    return this.enqueue(async () => {
+      if (typeof id !== 'string' || (id !== '' && !this.devices.some((d) => d.id === id)))
+        throw new Error('Устройство вывода звука недоступно')
+      const previous = this.selected
+      try {
+        await this.apply(id)
+        this.save(id)
+      } catch (error) {
+        try {
+          await this.apply(previous)
+        } catch {
+          this.notice = 'Не удалось восстановить устройство звука. Выберите устройство заново.'
+        }
+        throw error
+      }
+      this.selected = id
+      this.notice = ''
+    })
+  }
+  prepare(apply: (id: string) => Promise<void>) {
+    return this.enqueue(() => apply(this.selected))
+  }
+}