Added the track scan class

ref #11

src/models/TrackScan.ts

@@ -0,0 +1,83 @@
+import { PrimaryGeneratedColumn, Column } from "typeorm";
+import {
+  IsBoolean,
+  IsDateString,
+  IsInt,
+  IsNotEmpty,
+  IsOptional,
+  IsPositive,
+} from "class-validator";
+import { Scan } from "./Scan";
+import { Runner } from "./Runner";
+import { Track } from "./Track";
+import { RunnerCard } from "./RunnerCard";
+import { ScanStation } from "./ScanStation";
+
+/**
+ * Defines the scan interface.
+*/
+export class TrackScan extends Scan {
+  /**
+   * Autogenerated unique id (primary key).
+   */
+  @PrimaryGeneratedColumn()
+  @IsOptional()
+  @IsInt()
+  id: number;
+
+  /**
+   * The associated runner.
+   */
+  @Column()
+  @IsNotEmpty()
+  //TODO: Relationship
+  runner: Runner;
+
+  /**
+   * The associated track.
+   */
+  @Column()
+  @IsNotEmpty()
+  //TODO: Relationship
+  track: Track;
+
+  /**
+   * The associated card.
+   */
+  @Column()
+  @IsNotEmpty()
+  //TODO: Relationship
+  card: RunnerCard;
+
+  /**
+   * The scanning station.
+   */
+  @Column()
+  @IsNotEmpty()
+  //TODO: Relationship
+  station: ScanStation;
+
+  /**
+   * The scan's distance in meters.
+   */
+  @IsInt()
+  @IsPositive()
+  public get distance(): number {
+    return this.track.distance;
+  }
+
+  /**
+   * The scan's creation timestamp.
+   */
+  @Column()
+  @IsDateString()
+  @IsNotEmpty()
+  timestamp: string;
+
+  /**
+   * Is the scan valid (for fraud reasons).
+   */
+  @Column()
+  @IsBoolean()
+  valid = true;
+}