AI Implementation feature(902): Admin Area Challenges: List, Import/Export and Add/Edit Modal 1.02 (#43)

frontend/src/app/features/admin/challenges/challenge-form-modal.component.ts

@@ -11,7 +11,7 @@ import {
   signal,
 } from '@angular/core';
 import { CommonModule } from '@angular/common';
-import { FormBuilder, FormControl, FormGroup, ReactiveFormsModule, Validators } from '@angular/forms';
+import { AbstractControl, FormBuilder, FormControl, FormGroup, ReactiveFormsModule, ValidationErrors, Validators } from '@angular/forms';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import {
   AdminCategory,
@@ -25,6 +25,7 @@ import {
   ChallengeFormErrors,
   ChallengeFormFileItem,
   ChallengeStagedFileUi,
+  CATEGORY_ID_PATTERN,
   buildInitialFiles,
   defaultMinimumPoints,
   deriveMinimumPoints,
@@ -61,7 +62,7 @@ export function buildChallengeFormGroup(fb: FormBuilder): FormGroup<ChallengeFor
   return fb.nonNullable.group({
     name: fb.nonNullable.control('', [Validators.required, Validators.maxLength(128)]),
     descriptionMd: fb.nonNullable.control('', [Validators.required]),
-    categoryId: fb.nonNullable.control('', [Validators.required]),
+    categoryId: fb.nonNullable.control('', [Validators.required, categoryIdUuidValidator]),
     difficulty: fb.nonNullable.control<'LOW' | 'MEDIUM' | 'HIGH'>('MEDIUM'),
     initialPoints: fb.nonNullable.control(100, [Validators.required, Validators.min(1), Validators.max(100000)]),
     minimumPoints: fb.nonNullable.control(50, [Validators.required, Validators.min(1)]),
@@ -439,6 +440,9 @@ export class ChallengeFormModalComponent {
     if (ctrl.errors?.['pattern']) {
       return `${humanLabel(field)} must be a whole number`;
     }
+    if (ctrl.errors?.['uuid']) {
+      return `${humanLabel(field)} is required`;
+    }
     return null;
   }
 
@@ -521,6 +525,15 @@ export class ChallengeFormModalComponent {
       this.fileUploadError.set('Wait for uploads to finish before saving.');
       return;
     }
+    const categoryRaw = this.form.controls.categoryId.value;
+    if (!categoryRaw || !CATEGORY_ID_PATTERN.test(categoryRaw)) {
+      this.clientFieldErrors.set({ categoryId: 'Category is required' });
+      this.form.controls.categoryId.markAsTouched();
+      this.form.controls.categoryId.markAsDirty();
+      this.form.controls.categoryId.setErrors({ ...(this.form.controls.categoryId.errors ?? {}), uuid: true });
+      this.tab.set('general');
+      return;
+    }
     const portRaw = this.form.controls.port.value;
     const portAsNumber =
       portRaw === null || portRaw === undefined || portRaw === ''
@@ -604,5 +617,13 @@ function humanLabel(field: keyof ChallengeFormErrors): string {
   }
 }
 
+function categoryIdUuidValidator(control: AbstractControl): ValidationErrors | null {
+  const raw = control.value;
+  if (raw === null || raw === undefined || raw === '') {
+    return null;
+  }
+  return CATEGORY_ID_PATTERN.test(String(raw)) ? null : { uuid: true };
+}
+
 // Re-export so tests can find default helpers.
 export { defaultMinimumPoints };

frontend/src/app/features/admin/challenges/challenge-form.pure.ts

@@ -11,6 +11,8 @@ export type Protocol = 'NC' | 'WEB';
 export const DEFAULT_INITIAL_POINTS = 100;
 export const DEFAULT_DECAY_SOLVES = 10;
 
+export const CATEGORY_ID_PATTERN = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+
 export function defaultMinimumPoints(initial: number): number {
   if (!Number.isFinite(initial) || initial < 1) return 1;
   return Math.max(1, Math.floor(initial / 2));
@@ -83,7 +85,9 @@ export function validateChallengeForm(values: ChallengeFormDefaults): ChallengeF
   if (!values.name.trim()) errs.name = 'Name is required';
   else if (values.name.length > 128) errs.name = 'Name must be 128 characters or fewer';
   if (!values.descriptionMd.trim()) errs.descriptionMd = 'Description is required';
-  if (!values.categoryId) errs.categoryId = 'Category is required';
+  if (!values.categoryId || !CATEGORY_ID_PATTERN.test(values.categoryId)) {
+    errs.categoryId = 'Category is required';
+  }
   if (!Number.isInteger(values.initialPoints) || values.initialPoints < 1 || values.initialPoints > 100000) {
     errs.initialPoints = 'Initial points must be between 1 and 100000';
   }