v0.2 - 19 features: comparator, allergies, gamification, shopping list, achievements, stats, profile, share, bottom nav

backend/app/routers/achievements.py

@@ -0,0 +1,57 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select, func
+from app.database import get_db
+from app.models.user import User
+from app.models.scan import Scan
+from app.models.achievement import Achievement, UserAchievement
+from app.utils.security import get_current_user
+
+router = APIRouter(prefix="/api", tags=["achievements"])
+
+@router.get("/achievements")
+async def get_achievements(user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
+    # Get all achievements
+    res = await db.execute(select(Achievement).order_by(Achievement.id))
+    all_achievements = res.scalars().all()
+    
+    # Get user unlocked
+    unlocked_res = await db.execute(
+        select(UserAchievement).where(UserAchievement.user_id == user.id)
+    )
+    unlocked = {ua.achievement_id: ua.unlocked_at for ua in unlocked_res.scalars().all()}
+    
+    # Get progress counts
+    total_scans_res = await db.execute(select(func.count(Scan.id)).where(Scan.user_id == user.id))
+    total_scans = total_scans_res.scalar() or 0
+    
+    photo_scans_res = await db.execute(
+        select(func.count(Scan.id)).where(Scan.user_id == user.id, Scan.barcode == "PHOTO")
+    )
+    photo_scans = photo_scans_res.scalar() or 0
+    
+    progress_map = {
+        "first_scan": min(total_scans, 1),
+        "detective": min(total_scans, 10),
+        "expert": min(total_scans, 50),
+        "master": min(total_scans, 100),
+        "photographer": min(photo_scans, 5),
+        "comparator": 0,  # tracked separately
+    }
+    
+    result = []
+    for a in all_achievements:
+        is_unlocked = a.id in unlocked
+        result.append({
+            "id": a.id,
+            "code": a.code,
+            "name": a.name,
+            "description": a.description,
+            "emoji": a.emoji,
+            "target": a.target,
+            "progress": progress_map.get(a.code, 0),
+            "unlocked": is_unlocked,
+            "unlocked_at": unlocked[a.id].isoformat() if is_unlocked else None,
+        })
+    
+    return {"achievements": result, "total_scans": total_scans}