Rename DataManager to CameraManager.

src/camera/engine-factory.ts

@@ -0,0 +1,42 @@
+import { CameraConfig } from '../types';
+import { RecordingSegmentsCache } from './cache';
+import { CameraManagerEngine } from './engine';
+import { FrigateCameraManagerEngine } from './engine-frigate';
+import { DataQuery } from './types';
+
+export class CameraManagerEngineFactory {
+  protected _engines: Map<string, CameraManagerEngine> = new Map();
+
+  protected _getOrCreateEngine(engineKey: string): CameraManagerEngine | null {
+    const cachedEngine = this._engines.get(engineKey);
+    if (cachedEngine) {
+      return cachedEngine;
+    }
+    let newEngine: CameraManagerEngine | null = null;
+    switch (engineKey) {
+      case 'frigate':
+        newEngine = new FrigateCameraManagerEngine(new RecordingSegmentsCache());
+        break;
+    }
+    if (newEngine) {
+      this._engines.set(engineKey, newEngine);
+    }
+    return newEngine;
+  }
+
+  public getEngineForQuery(
+    cameras: Map<string, CameraConfig>,
+    query: DataQuery,
+  ): CameraManagerEngine | null {
+    const cameraConfig = cameras.get(query.cameraID);
+    return cameraConfig ? this.getEngineForCamera(cameraConfig) : null;
+  }
+
+  public getEngineForCamera(cameraConfig: CameraConfig): CameraManagerEngine | null {
+    let engineKey: string | null = null;
+    if (cameraConfig.frigate.camera_name) {
+      engineKey = 'frigate';
+    }
+    return engineKey ? this._getOrCreateEngine(engineKey) : null;
+  }
+}