System AI

.env.example

@@ -44,9 +44,8 @@ AUTHENTIK_BOOTSTRAP_TOKEN=
 LOG_REQUESTS=false
 
 # ==============================================================================
-# OPTIONAL - System AI (Gemini API Key for quiz generation)
-# If set, users can generate quizzes without providing their own API key.
+# OPTIONAL - System AI (Gemini API Key for server-side quiz generation)
+# If set, users can generate quizzes using "System AI" without their own key.
 # Get a key at: https://aistudio.google.com/apikey
-# WARNING: This key is embedded in the frontend and visible to users.
 # ==============================================================================
-VITE_API_KEY=
+GEMINI_API_KEY=

docker-compose.prod.yml

@@ -100,6 +100,7 @@ services:
       OIDC_INTERNAL_JWKS_URI: http://authentik-server:9000/application/o/kaboot/jwks/
       CORS_ORIGIN: ${CORS_ORIGIN}
       LOG_REQUESTS: ${LOG_REQUESTS:-true}
+      GEMINI_API_KEY: ${GEMINI_API_KEY:-}
     volumes:
       - kaboot-data:/data
     networks:

hooks/useGame.ts

@@ -615,7 +615,7 @@ export const useGame = () => {
     questionCount?: number; 
     files?: File[]; 
     useOcr?: boolean;
-    aiProvider?: 'gemini' | 'openrouter' | 'openai';
+    aiProvider?: 'gemini' | 'openrouter' | 'openai' | 'system';
     apiKey?: string;
     geminiModel?: string;
     openRouterModel?: string;
@@ -642,6 +642,7 @@ export const useGame = () => {
         geminiModel: options.geminiModel,
         openRouterModel: options.openRouterModel,
         openAIModel: options.openAIModel,
+        accessToken: options.aiProvider === 'system' ? auth.user?.access_token : undefined,
       };
       
       const generatedQuiz = await generateQuiz(generateOptions);

scripts/setup-prod.sh

@@ -156,8 +156,8 @@ CORS_ORIGIN=https://${KABOOT_DOMAIN}
 NODE_ENV=production
 LOG_REQUESTS=true
 
-# System AI (optional - for quiz generation without user's own key)
-VITE_API_KEY=${GEMINI_API_KEY}
+# System AI (optional - server-side quiz generation)
+GEMINI_API_KEY=${GEMINI_API_KEY}
 EOF
 
 print_success "Created .env"
@@ -216,17 +216,18 @@ fi
 
 print_step "Building frontend with production URLs..."
 
-BUILD_ENV="VITE_API_URL=https://${KABOOT_DOMAIN} VITE_AUTHENTIK_URL=https://${AUTH_DOMAIN} VITE_OIDC_CLIENT_ID=kaboot-spa VITE_OIDC_APP_SLUG=kaboot"
+VITE_API_URL="https://${KABOOT_DOMAIN}" \
+VITE_AUTHENTIK_URL="https://${AUTH_DOMAIN}" \
+VITE_OIDC_CLIENT_ID="kaboot-spa" \
+VITE_OIDC_APP_SLUG="kaboot" \
+npm run build --silent 2>/dev/null || npm run build
 
 if [ -n "$GEMINI_API_KEY" ]; then
-    BUILD_ENV="$BUILD_ENV VITE_API_KEY=$GEMINI_API_KEY"
-    print_success "System AI enabled with provided Gemini key"
+    print_success "System AI will be available (key configured for backend)"
 else
     print_warning "No Gemini API key provided - users must configure their own"
 fi
 
-eval "$BUILD_ENV npm run build --silent 2>/dev/null || $BUILD_ENV npm run build"
-
 print_success "Frontend built"
 
 echo ""

server/package.json

@@ -11,6 +11,7 @@
     "test:get-token": "tsx --env-file=.env.test tests/get-token.ts"
   },
   "dependencies": {
+    "@google/genai": "^0.14.1",
     "better-sqlite3": "^11.7.0",
     "cors": "^2.8.5",
     "express": "^4.21.2",

server/src/index.ts

@@ -7,6 +7,7 @@ import quizzesRouter from './routes/quizzes.js';
 import usersRouter from './routes/users.js';
 import uploadRouter from './routes/upload.js';
 import gamesRouter from './routes/games.js';
+import generateRouter from './routes/generate.js';
 
 const app = express();
 const PORT = process.env.PORT || 3001;
@@ -91,6 +92,7 @@ app.use('/api/quizzes', quizzesRouter);
 app.use('/api/users', usersRouter);
 app.use('/api/upload', uploadRouter);
 app.use('/api/games', gamesRouter);
+app.use('/api/generate', generateRouter);
 
 app.use((err: Error, _req: Request, res: Response, _next: NextFunction) => {
   console.error('Unhandled error:', err);

server/src/middleware/auth.ts

@@ -82,3 +82,23 @@ export function requireAuth(
     }
   );
 }
+
+export function requireAIAccess(
+  req: AuthenticatedRequest,
+  res: Response,
+  next: NextFunction
+): void {
+  if (!req.user) {
+    res.status(401).json({ error: 'Authentication required' });
+    return;
+  }
+
+  const hasAccess = req.user.groups?.includes('kaboot-ai-access');
+  
+  if (!hasAccess) {
+    res.status(403).json({ error: 'AI access not granted for this account' });
+    return;
+  }
+
+  next();
+}

server/src/routes/generate.ts

@@ -0,0 +1,180 @@
+import { Router, Response } from 'express';
+import { GoogleGenAI, Type, createUserContent, createPartFromUri } from '@google/genai';
+import { requireAuth, AuthenticatedRequest, requireAIAccess } from '../middleware/auth.js';
+import { v4 as uuidv4 } from 'uuid';
+
+const router = Router();
+
+const GEMINI_API_KEY = process.env.GEMINI_API_KEY;
+const DEFAULT_MODEL = 'gemini-2.5-flash-preview-05-20';
+
+interface GenerateRequest {
+  topic: string;
+  questionCount?: number;
+  documents?: Array<{
+    type: 'text' | 'native';
+    content: string;
+    mimeType?: string;
+  }>;
+}
+
+const QUIZ_SCHEMA = {
+  type: Type.OBJECT,
+  properties: {
+    title: { type: Type.STRING, description: "A catchy title for the quiz" },
+    questions: {
+      type: Type.ARRAY,
+      items: {
+        type: Type.OBJECT,
+        properties: {
+          text: { type: Type.STRING, description: "The question text" },
+          options: {
+            type: Type.ARRAY,
+            items: {
+              type: Type.OBJECT,
+              properties: {
+                text: { type: Type.STRING },
+                isCorrect: { type: Type.BOOLEAN },
+                reason: { type: Type.STRING, description: "Brief explanation of why this answer is correct or incorrect" }
+              },
+              required: ["text", "isCorrect", "reason"]
+            },
+          }
+        },
+        required: ["text", "options"]
+      }
+    }
+  },
+  required: ["title", "questions"]
+};
+
+function buildPrompt(topic: string, questionCount: number, hasDocuments: boolean): string {
+  const baseInstructions = `Create ${questionCount} engaging multiple-choice questions. Each question must have exactly 4 options, and exactly one correct answer. Vary the difficulty.
+
+IMPORTANT: For each option's reason, write as if you are directly explaining facts - never reference "the document", "the text", "the material", or "the source". Write explanations as standalone factual statements.`;
+
+  if (hasDocuments) {
+    const topicContext = topic ? ` Focus on aspects related to "${topic}".` : '';
+    return `Generate a quiz based on the provided content.${topicContext}\n\n${baseInstructions}`;
+  }
+  
+  return `Generate a trivia quiz about "${topic}".\n\n${baseInstructions}`;
+}
+
+function shuffleArray<T>(array: T[]): T[] {
+  const shuffled = [...array];
+  for (let i = shuffled.length - 1; i > 0; i--) {
+    const j = Math.floor(Math.random() * (i + 1));
+    [shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
+  }
+  return shuffled;
+}
+
+function transformToQuiz(data: any) {
+  const shapes = ['triangle', 'diamond', 'circle', 'square'] as const;
+  const colors = ['red', 'blue', 'yellow', 'green'] as const;
+  
+  const questions = data.questions.map((q: any) => {
+    const shuffledOpts = shuffleArray(q.options);
+    
+    const options = shuffledOpts.map((opt: any, index: number) => ({
+      text: opt.text,
+      isCorrect: opt.isCorrect,
+      shape: shapes[index % 4],
+      color: colors[index % 4],
+      reason: opt.reason
+    }));
+
+    return {
+      id: uuidv4(),
+      text: q.text,
+      options,
+      timeLimit: 20
+    };
+  });
+
+  return {
+    title: data.title,
+    questions
+  };
+}
+
+router.get('/status', (_req, res: Response) => {
+  res.json({ 
+    available: !!GEMINI_API_KEY,
+    model: DEFAULT_MODEL
+  });
+});
+
+router.post('/', requireAuth, requireAIAccess, async (req: AuthenticatedRequest, res: Response) => {
+  if (!GEMINI_API_KEY) {
+    res.status(503).json({ error: 'System AI is not configured' });
+    return;
+  }
+
+  const { topic, questionCount = 10, documents = [] } = req.body as GenerateRequest;
+
+  if (!topic && documents.length === 0) {
+    res.status(400).json({ error: 'Topic or documents required' });
+    return;
+  }
+
+  try {
+    const ai = new GoogleGenAI({ apiKey: GEMINI_API_KEY });
+    const hasDocuments = documents.length > 0;
+    const prompt = buildPrompt(topic, questionCount, hasDocuments);
+    
+    let contents: any;
+    
+    if (hasDocuments) {
+      const parts: any[] = [];
+      
+      for (const doc of documents) {
+        if (doc.type === 'native' && doc.mimeType) {
+          const buffer = Buffer.from(doc.content, 'base64');
+          const blob = new Blob([buffer], { type: doc.mimeType });
+          
+          const uploadedFile = await ai.files.upload({
+            file: blob,
+            config: { mimeType: doc.mimeType }
+          });
+          
+          if (uploadedFile.uri && uploadedFile.mimeType) {
+            parts.push(createPartFromUri(uploadedFile.uri, uploadedFile.mimeType));
+          }
+        } else if (doc.type === 'text') {
+          parts.push({ text: doc.content });
+        }
+      }
+      
+      parts.push({ text: prompt });
+      contents = createUserContent(parts);
+    } else {
+      contents = prompt;
+    }
+
+    const response = await ai.models.generateContent({
+      model: DEFAULT_MODEL,
+      contents,
+      config: {
+        responseMimeType: "application/json",
+        responseSchema: QUIZ_SCHEMA
+      }
+    });
+
+    if (!response.text) {
+      res.status(500).json({ error: 'Failed to generate quiz content' });
+      return;
+    }
+
+    const data = JSON.parse(response.text);
+    const quiz = transformToQuiz(data);
+    
+    res.json(quiz);
+  } catch (err: any) {
+    console.error('AI generation error:', err);
+    res.status(500).json({ error: err.message || 'Failed to generate quiz' });
+  }
+});
+
+export default router;

services/geminiService.ts

@@ -406,9 +406,61 @@ async function generateQuizWithOpenAI(options: GenerateQuizOptions): Promise<Qui
   return transformToQuiz(data);
 }
 
+const API_URL = import.meta.env.VITE_API_URL || '';
+
+async function generateQuizWithServer(options: GenerateQuizOptions): Promise<Quiz> {
+  if (!options.accessToken) {
+    throw new Error("Authentication required for system AI");
+  }
+
+  const docs = options.documents || [];
+  const documentsPayload = docs.map(doc => ({
+    type: doc.type,
+    content: doc.type === 'native' && doc.content instanceof ArrayBuffer
+      ? btoa(String.fromCharCode(...new Uint8Array(doc.content)))
+      : doc.content,
+    mimeType: doc.mimeType
+  }));
+
+  const response = await fetch(`${API_URL}/api/generate`, {
+    method: 'POST',
+    headers: {
+      'Authorization': `Bearer ${options.accessToken}`,
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({
+      topic: options.topic,
+      questionCount: options.questionCount || 10,
+      documents: documentsPayload
+    })
+  });
+
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ error: 'Unknown error' }));
+    throw new Error(error.error || `Server error: ${response.status}`);
+  }
+
+  return response.json();
+}
+
+export async function checkSystemAIAvailable(): Promise<boolean> {
+  try {
+    const response = await fetch(`${API_URL}/api/generate/status`);
+    if (!response.ok) return false;
+    const data = await response.json();
+    return data.available === true;
+  } catch {
+    return false;
+  }
+}
+
 export const generateQuiz = async (options: GenerateQuizOptions): Promise<Quiz> => {
   const provider = options.aiProvider || 'gemini';
   
+  if (provider === 'system') {
+    return generateQuizWithServer(options);
+  }
+  
   if (provider === 'openrouter') {
     return generateQuizWithOpenRouter(options);
   }

types.ts

@@ -36,7 +36,7 @@ export const COLOR_SCHEMES: ColorScheme[] = [
   { id: 'rose', name: 'Rose', primary: '#e11d48', primaryDark: '#be123c', primaryDarker: '#5f1a2a' },
 ];
 
-export type AIProvider = 'gemini' | 'openrouter' | 'openai';
+export type AIProvider = 'gemini' | 'openrouter' | 'openai' | 'system';
 
 export interface UserPreferences {
   colorScheme: string;
@@ -140,6 +140,7 @@ export interface GenerateQuizOptions {
   geminiModel?: string;
   openRouterModel?: string;
   openAIModel?: string;
+  accessToken?: string;
 }
 
 export interface PointsBreakdown {