Still broken distance, we'll fix this together

ref #13

src/models/entities/Runner.ts

@@ -36,13 +36,25 @@ export class Runner extends Participant {
   @OneToMany(() => Scan, scan => scan.runner, { nullable: true })
   scans: Scan[];
 
-  @IsInt()
-  public get distance(): number {
-    getConnectionManager().get().getRepository(Scan).find({ runner: this })
-      .then(myScans => {
-        return myScans.reduce((sum, current) => sum + current.distance, 0);
-      })
-      .catch(err => { throw err })
-      .finally(do => { return -1; });
+  /**
+   * Returns all scans associated with this runner.
+   */
+  public async getScans(): Promise<Scan[]> {
+    return await getConnectionManager().get().getRepository(Scan).find({ runner: this });
   }
-}
+
+  /**
+   * Returns all valid scans associated with this runner.
+   */
+  public async getValidScans(): Promise<Scan[]> {
+    return (await this.getScans()).filter(scan => { scan.valid === true });
+  }
+
+  /**
+   * Returns the total distance ran by this runner.
+  */
+  @IsInt()
+  public async distance(): Promise<number> {
+    return await (await this.getValidScans()).reduce((sum, current) => sum + current.distance, 0);
+  }
+}