Fix the date validator, was checking indexes, not values!

src/lib/client.ts

@@ -2,7 +2,7 @@ import { BaseClient } from "./base.js";
 import { PisModule } from "../modules/pis.js";
 import { LocationFilterModule } from "../modules/locationFilter.js";
 import { StationDataModule } from "../modules/stationData.js";
-import { TrainsModule } from "src/modules/trains.js";
+import { TrainsModule } from "../modules/trains.js";
 
 export class OwlBoardClient extends BaseClient {
     public readonly pis: PisModule;

src/lib/validation.ts

@@ -97,7 +97,7 @@ export const IsValidDateStr = (s: string): boolean => {
     for (let i = 0; i < 10; i++) {
         if (i === 4 || i === 7) continue;
         const c = s.charCodeAt(i);
-        if (!isDigit(i)) return false;
+        if (!isDigit(c)) return false;
     }
 
     const y = parseInt(s.substring(0, 4), 10);

src/modules/trains.ts

@@ -1,7 +1,7 @@
 import { ApiTrainsTrainByHeadcode } from '@owlboard/api-schema-types';
 import type { BaseClient, ApiResult } from '../lib/base.js';
 import { IsValidHeadcode, IsValidToc, IsValidDateStr } from '../lib/validation.js';
-import { ensureDateString } from 'src/lib/helpers.js';
+import { ensureDateString } from '../lib/helpers.js';
 import { ValidationError } from '../lib/errors.js';
 
 export class TrainsModule {