first commit

backend/routers/stats.py

@@ -0,0 +1,37 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy import func
+from sqlalchemy.orm import Session
+
+from backend.auth import get_current_user
+from backend.database import get_db
+from backend.models import ImportHistory, Question
+
+router = APIRouter(dependencies=[Depends(get_current_user)])
+
+
+@router.get("")
+def get_stats(db: Session = Depends(get_db)) -> dict:
+    total = db.query(func.count(Question.id)).scalar() or 0
+    by_type = db.query(Question.question_type, func.count(Question.id)).group_by(Question.question_type).all()
+    by_difficulty = db.query(Question.difficulty, func.count(Question.id)).group_by(Question.difficulty).all()
+    by_chapter = db.query(Question.chapter, func.count(Question.id)).group_by(Question.chapter).all()
+    latest_imports = (
+        db.query(ImportHistory).order_by(ImportHistory.created_at.desc()).limit(10).all()
+    )
+    return {
+        "total": total,
+        "by_type": [{"name": n or "未分类", "value": v} for n, v in by_type],
+        "by_difficulty": [{"name": n or "未分类", "value": v} for n, v in by_difficulty],
+        "by_chapter": [{"name": n or "未分类", "value": v} for n, v in by_chapter],
+        "latest_imports": [
+            {
+                "id": i.id,
+                "filename": i.filename,
+                "method": i.method,
+                "question_count": i.question_count,
+                "status": i.status,
+                "created_at": i.created_at.isoformat(),
+            }
+            for i in latest_imports
+        ],
+    }