Improved error handling for negative lap times

ref #71

src/controllers/TrackController.ts

@@ -2,7 +2,7 @@ import { Authorized, Body, Delete, Get, JsonController, OnUndefined, Param, Post
 import { OpenAPI, ResponseSchema } from 'routing-controllers-openapi';
 import { getConnectionManager, Repository } from 'typeorm';
 import { EntityFromBody } from 'typeorm-routing-controllers-extensions';
-import { TrackIdsNotMatchingError, TrackNotFoundError } from "../errors/TrackErrors";
+import { TrackIdsNotMatchingError, TrackLapTimeCantBeNegativeError, TrackNotFoundError } from "../errors/TrackErrors";
 import { CreateTrack } from '../models/actions/CreateTrack';
 import { Track } from '../models/entities/Track';
 import { ResponseEmpty } from '../models/responses/ResponseEmpty';
@@ -48,6 +48,7 @@ export class TrackController {
 	@Post()
 	@Authorized("TRACK:CREATE")
 	@ResponseSchema(ResponseTrack)
+	@ResponseSchema(TrackLapTimeCantBeNegativeError, { statusCode: 406 })
 	@OpenAPI({ description: "Create a new track. <br> Please remember that the track\'s distance must be greater than 0." })
 	async post(
 		@Body({ validate: true })
@@ -61,6 +62,7 @@ export class TrackController {
 	@ResponseSchema(ResponseTrack)
 	@ResponseSchema(TrackNotFoundError, { statusCode: 404 })
 	@ResponseSchema(TrackIdsNotMatchingError, { statusCode: 406 })
+	@ResponseSchema(TrackLapTimeCantBeNegativeError, { statusCode: 406 })
 	@OpenAPI({ description: "Update the track whose id you provided. <br> Please remember that ids can't be changed." })
 	async put(@Param('id') id: number, @EntityFromBody() track: Track) {
 		let oldTrack = await this.trackRepository.findOne({ id: id });

src/errors/TrackErrors.ts

@@ -23,3 +23,14 @@ export class TrackIdsNotMatchingError extends NotAcceptableError {
 	@IsString()
 	message = "The ids don't match! \n And if you wanted to change a track's id: This isn't allowed"
 }
+
+/**
+ * Error to throw when a track's lap time is set to a negative value.
+ */
+export class TrackLapTimeCantBeNegativeError extends NotAcceptableError {
+	@IsString()
+	name = "TrackLapTimeCantBeNegativeError"
+
+	@IsString()
+	message = "The minimum lap time you provided is negative - That isn't possible. \n If you wanted to disable it: Just set it to 0/null."
+}

src/models/actions/CreateTrack.ts

@@ -1,4 +1,5 @@
 import { IsInt, IsNotEmpty, IsOptional, IsPositive, IsString } from 'class-validator';
+import { TrackLapTimeCantBeNegativeError } from '../../errors/TrackErrors';
 import { Track } from '../entities/Track';
 
 /**
@@ -25,8 +26,7 @@ export class CreateTrack {
      */
     @IsInt()
     @IsOptional()
-    @IsPositive()
+    minimumLapTime: number;
-    minimumLapTime?: number;
 
     /**
      * Creates a new Track entity from this.
@@ -37,6 +37,9 @@ export class CreateTrack {
         newTrack.name = this.name;
         newTrack.distance = this.distance;
         newTrack.minimumLapTime = this.minimumLapTime;
+        if (this.minimumLapTime < 0) {
+            throw new TrackLapTimeCantBeNegativeError();
+        }
 
         return newTrack;
     }

src/models/entities/Track.ts

@@ -43,10 +43,9 @@ export class Track {
    * The minimum time a runner should take to run a lap on this track.
    * Will be used for fraud detection.
    */
-  @Column()
+  @Column({ nullable: true })
   @IsInt()
   @IsOptional()
-  @IsPositive()
   minimumLapTime?: number;
 
   /**

src/models/responses/ResponseTrack.ts

@@ -1,4 +1,5 @@
 import { IsInt, IsOptional, IsString } from "class-validator";
+import { TrackLapTimeCantBeNegativeError } from '../../errors/TrackErrors';
 import { Track } from '../entities/Track';
 
 /**
@@ -40,5 +41,8 @@ export class ResponseTrack {
         this.name = track.name;
         this.distance = track.distance;
         this.minimumLapTime = track.minimumLapTime;
+        if (this.minimumLapTime < 0) {
+            throw new TrackLapTimeCantBeNegativeError();
+        }
     }
 }