57 lines
1.6 KiB
TypeScript
57 lines
1.6 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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type MediaDeviceCacheKind = 'audio' | 'video';
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interface CachedDeviceEntry {
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devices: Array<MediaDeviceInfo>;
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fetchedAt: number;
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}
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type DeviceFetcher = () => Promise<Array<MediaDeviceInfo>>;
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class MediaDeviceCache {
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private cache = new Map<MediaDeviceCacheKind, CachedDeviceEntry>();
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async getDevices(type: MediaDeviceCacheKind, fetchDevices: DeviceFetcher): Promise<CachedDeviceEntry> {
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const cached = this.cache.get(type);
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if (cached) {
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return cached;
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}
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const devices = await fetchDevices();
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const entry = {devices, fetchedAt: Date.now()};
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this.cache.set(type, entry);
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return entry;
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}
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invalidate(type: MediaDeviceCacheKind): void {
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this.cache.delete(type);
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}
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invalidateAll(): void {
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this.cache.clear();
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}
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startDeviceChangeListener(): () => void {
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return () => {};
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}
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}
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export const mediaDeviceCache = new MediaDeviceCache();
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