feat: Implement basic general folder support (#2051)

- Related: #1748

src/camera-manager/cache.ts

@@ -1,69 +1,6 @@
-import isEqual from 'lodash-es/isEqual';
-import orderBy from 'lodash-es/orderBy';
-import sortedUniqBy from 'lodash-es/sortedUniqBy';
+import { orderBy, sortedUniqBy } from 'lodash-es';
 import { DateRange, MemoryRangeSet } from './range';
-import { DataQuery, QueryResults, RecordingSegment } from './types';
-
-interface RequestCacheItem<Request, Response> {
-  request: Request;
-  response: Response;
-  expires?: Date;
-}
-
-interface CameraManagerCache<Request, Response> {
-  get(request: Request): Response | null;
-  has(request: Request): boolean;
-  set(request: Request, response: Response, expiry?: Date): void;
-}
-
-export class MemoryRequestCache<Request, Response>
-  implements CameraManagerCache<Request, Response>
-{
-  protected _data: RequestCacheItem<Request, Response>[] = [];
-
-  public get(request: Request): Response | null {
-    const now = new Date();
-    for (const item of this._data) {
-      if (
-        (!item.expires || now <= item.expires) &&
-        this._contains(request, item.request)
-      ) {
-        return item.response;
-      }
-    }
-    return null;
-  }
-
-  public clear(): void {
-    this._data = [];
-  }
-
-  public has(request: Request): boolean {
-    return !!this.get(request);
-  }
-
-  public set(request: Request, response: Response, expiry?: Date): void {
-    this._data.push({
-      request: request,
-      response: response,
-      expires: expiry,
-    });
-
-    // Clean up old requests on set.
-    this._expireOldRequests();
-  }
-
-  protected _contains(a: Request, b: Request): boolean {
-    return isEqual(a, b);
-  }
-
-  protected _expireOldRequests(): void {
-    const now = new Date();
-    this._data = this._data.filter((item) => !item.expires || now < item.expires);
-  }
-}
-
-export class RequestCache extends MemoryRequestCache<DataQuery, QueryResults> {}
+import { RecordingSegment } from './types';
 
 class MemoryRangedCache<Data> {
   protected _ranges: MemoryRangeSet = new MemoryRangeSet();