Implemented the first route of the toResponse normalisationf for all classes

ref #67

src/models/entities/TrackScan.ts

@@ -6,6 +6,7 @@ import {
   IsPositive
 } from "class-validator";
 import { ChildEntity, Column, ManyToOne } from "typeorm";
+import { ResponseTrackScan } from '../responses/ResponseTrackScan';
 import { RunnerCard } from "./RunnerCard";
 import { Scan } from "./Scan";
 import { ScanStation } from "./ScanStation";
@@ -59,4 +60,11 @@ export class TrackScan extends Scan {
   @IsDateString()
   @IsNotEmpty()
   timestamp: string;
+
+  /**
+   * Turns this entity into it's response class.
+   */
+  public toResponse(): ResponseTrackScan {
+    return new ResponseTrackScan(this);
+  }
 }