Fix

backend/app/api/v1/games.py

@@ -10,6 +10,7 @@ from app.core.config import settings
 from app.models import Marathon, MarathonStatus, GameProposalMode, Game, GameStatus, Challenge, Activity, ActivityType
 from app.schemas import GameCreate, GameUpdate, GameResponse, MessageResponse, UserPublic
 from app.services.storage import storage_service
+from app.services.telegram_notifier import telegram_notifier
 
 router = APIRouter(tags=["games"])
 
@@ -268,6 +269,13 @@ async def approve_game(game_id: int, current_user: CurrentUser, db: DbSession):
     if game.status != GameStatus.PENDING.value:
         raise HTTPException(status_code=400, detail="Game is not pending")
 
+    # Get marathon title for notification
+    marathon_result = await db.execute(select(Marathon).where(Marathon.id == game.marathon_id))
+    marathon = marathon_result.scalar_one()
+
+    # Save proposer id before status change
+    proposer_id = game.proposed_by_id
+
     game.status = GameStatus.APPROVED.value
     game.approved_by_id = current_user.id
 
@@ -283,6 +291,12 @@ async def approve_game(game_id: int, current_user: CurrentUser, db: DbSession):
     await db.commit()
     await db.refresh(game)
 
+    # Notify proposer (if not self-approving)
+    if proposer_id and proposer_id != current_user.id:
+        await telegram_notifier.notify_game_approved(
+            db, proposer_id, marathon.title, game.title
+        )
+
     # Need to reload relationships
     game = await get_game_or_404(db, game_id)
     challenges_count = await db.scalar(
@@ -302,6 +316,14 @@ async def reject_game(game_id: int, current_user: CurrentUser, db: DbSession):
     if game.status != GameStatus.PENDING.value:
         raise HTTPException(status_code=400, detail="Game is not pending")
 
+    # Get marathon title for notification
+    marathon_result = await db.execute(select(Marathon).where(Marathon.id == game.marathon_id))
+    marathon = marathon_result.scalar_one()
+
+    # Save proposer id and game title before changes
+    proposer_id = game.proposed_by_id
+    game_title = game.title
+
     game.status = GameStatus.REJECTED.value
 
     # Log activity
@@ -316,6 +338,12 @@ async def reject_game(game_id: int, current_user: CurrentUser, db: DbSession):
     await db.commit()
     await db.refresh(game)
 
+    # Notify proposer
+    if proposer_id and proposer_id != current_user.id:
+        await telegram_notifier.notify_game_rejected(
+            db, proposer_id, marathon.title, game_title
+        )
+
     # Need to reload relationships
     game = await get_game_or_404(db, game_id)
     challenges_count = await db.scalar(

backend/app/api/v1/marathons.py

@@ -1,5 +1,6 @@
 from datetime import timedelta
 import secrets
+import string
 from fastapi import APIRouter, HTTPException, status
 from sqlalchemy import select, func
 from sqlalchemy.orm import selectinload
@@ -10,7 +11,7 @@ from app.api.deps import (
     get_participant,
 )
 from app.models import (
-    Marathon, Participant, MarathonStatus, Game, GameStatus,
+    Marathon, Participant, MarathonStatus, Game, GameStatus, Challenge,
     Assignment, AssignmentStatus, Activity, ActivityType, ParticipantRole,
 )
 from app.schemas import (
@@ -40,7 +41,7 @@ async def get_marathon_by_code(invite_code: str, db: DbSession):
         select(Marathon, func.count(Participant.id).label("participants_count"))
         .outerjoin(Participant)
         .options(selectinload(Marathon.creator))
-        .where(Marathon.invite_code == invite_code)
+        .where(func.upper(Marathon.invite_code) == invite_code.upper())
         .group_by(Marathon.id)
     )
     row = result.first()
@@ -62,7 +63,9 @@ async def get_marathon_by_code(invite_code: str, db: DbSession):
 
 
 def generate_invite_code() -> str:
-    return secrets.token_urlsafe(8)
+    """Generate a clean 8-character uppercase alphanumeric code."""
+    alphabet = string.ascii_uppercase + string.digits
+    return ''.join(secrets.choice(alphabet) for _ in range(8))
 
 
 async def get_marathon_or_404(db, marathon_id: int) -> Marathon:
@@ -272,15 +275,33 @@ async def start_marathon(marathon_id: int, current_user: CurrentUser, db: DbSess
     if marathon.status != MarathonStatus.PREPARING.value:
         raise HTTPException(status_code=400, detail="Marathon is not in preparing state")
 
-    # Check if there are approved games with challenges
-    games_count = await db.scalar(
-        select(func.count()).select_from(Game).where(
+    # Check if there are approved games
+    games_result = await db.execute(
+        select(Game).where(
             Game.marathon_id == marathon_id,
             Game.status == GameStatus.APPROVED.value,
         )
     )
-    if games_count == 0:
-        raise HTTPException(status_code=400, detail="Add and approve at least one game before starting")
+    approved_games = games_result.scalars().all()
+
+    if len(approved_games) == 0:
+        raise HTTPException(status_code=400, detail="Добавьте и одобрите хотя бы одну игру")
+
+    # Check that all approved games have at least one challenge
+    games_without_challenges = []
+    for game in approved_games:
+        challenge_count = await db.scalar(
+            select(func.count()).select_from(Challenge).where(Challenge.game_id == game.id)
+        )
+        if challenge_count == 0:
+            games_without_challenges.append(game.title)
+
+    if games_without_challenges:
+        games_list = ", ".join(games_without_challenges)
+        raise HTTPException(
+            status_code=400,
+            detail=f"У следующих игр нет челленджей: {games_list}"
+        )
 
     marathon.status = MarathonStatus.ACTIVE.value
 
@@ -332,7 +353,7 @@ async def finish_marathon(marathon_id: int, current_user: CurrentUser, db: DbSes
 @router.post("/join", response_model=MarathonResponse)
 async def join_marathon(data: JoinMarathon, current_user: CurrentUser, db: DbSession):
     result = await db.execute(
-        select(Marathon).where(Marathon.invite_code == data.invite_code)
+        select(Marathon).where(func.upper(Marathon.invite_code) == data.invite_code.upper())
     )
     marathon = result.scalar_one_or_none()
 

backend/app/services/telegram_notifier.py

@@ -244,6 +244,38 @@ class TelegramNotifier:
             )
         return await self.notify_user(db, user_id, message)
 
+    async def notify_game_approved(
+        self,
+        db: AsyncSession,
+        user_id: int,
+        marathon_title: str,
+        game_title: str
+    ) -> bool:
+        """Notify user that their proposed game was approved."""
+        message = (
+            f"✅ <b>Твоя игра одобрена!</b>\n\n"
+            f"Марафон: {marathon_title}\n"
+            f"Игра: {game_title}\n\n"
+            f"Теперь она доступна для всех участников."
+        )
+        return await self.notify_user(db, user_id, message)
+
+    async def notify_game_rejected(
+        self,
+        db: AsyncSession,
+        user_id: int,
+        marathon_title: str,
+        game_title: str
+    ) -> bool:
+        """Notify user that their proposed game was rejected."""
+        message = (
+            f"❌ <b>Твоя игра отклонена</b>\n\n"
+            f"Марафон: {marathon_title}\n"
+            f"Игра: {game_title}\n\n"
+            f"Ты можешь предложить другую игру."
+        )
+        return await self.notify_user(db, user_id, message)
+
 
 # Global instance
 telegram_notifier = TelegramNotifier()