feat: Admin Area Challenges: List, Import/Export and Add/Edit Modal 1.01

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

@@ -230,6 +230,60 @@ export interface ChallengeStagedFileUi {
   uploading?: boolean;
 }
 
+export interface StageFileOutcome {
+  accepted: { file: File; placeholder: ChallengeStagedFileUi }[];
+  rejected: { file: File; reason: string }[];
+}
+
+export function partitionFilesBySize(
+  files: File[],
+  globalFileLimit: number,
+): StageFileOutcome {
+  const accepted: StageFileOutcome['accepted'] = [];
+  const rejected: StageFileOutcome['rejected'] = [];
+  for (const file of files) {
+    if (file.size > globalFileLimit) {
+      rejected.push({
+        file,
+        reason: `Failed to upload '${file.name}': File exceeds the global size limit (${file.size} > ${globalFileLimit})`,
+      });
+    } else {
+      accepted.push({
+        file,
+        placeholder: {
+          kind: 'staged',
+          token: undefined,
+          originalFilename: file.name,
+          mimeType: file.type || 'application/octet-stream',
+          sizeBytes: file.size,
+          uploading: true,
+        },
+      });
+    }
+  }
+  return { accepted, rejected };
+}
+
+export function firstErrorTab(
+  errors: ChallengeFormErrors,
+): 'general' | 'connection' | 'files' | null {
+  if (
+    errors.name ||
+    errors.descriptionMd ||
+    errors.categoryId ||
+    errors.initialPoints ||
+    errors.minimumPoints ||
+    errors.decaySolves ||
+    errors.flag
+  ) {
+    return 'general';
+  }
+  if (errors.protocol || errors.port || errors.ipAddress) {
+    return 'connection';
+  }
+  return null;
+}
+
 export function buildInitialFiles(detail?: AdminChallengeDetail | null): ChallengeStagedFileUi[] {
   if (!detail) return [];
   return detail.files.map((f: AdminChallengeFile) => ({