new init

apps/backend/app/api/categories.py

@@ -0,0 +1,85 @@
+# app/routes/categories.py
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.core.database import SessionLocal
+from app.core.auth import get_current_user, requires_role
+from app.models.user import User
+from app.models.product import Product
+
+router = APIRouter(prefix="/categories", tags=["categories"])
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+@router.get("/", response_model=list[str])
+def list_categories(db: Session = Depends(get_db)):
+    """
+    Alle Kategorien (distinct aus Product.category).
+    """
+    cats = db.query(Product.category).distinct().all()
+    return sorted([c[0] for c in cats if c[0]])
+
+
+@router.put(
+    "/rename",
+    dependencies=[Depends(requires_role("manager", "admin"))],
+)
+def rename_category(
+    old_name: str,
+    new_name: str,
+    db: Session = Depends(get_db),
+    user: User = Depends(get_current_user),
+):
+    """
+    Kategorie umbenennen: alle Produkte mit old_name -> new_name.
+    """
+    if not new_name or new_name.lower() == "alle":
+        raise HTTPException(status_code=400, detail="Invalid category name")
+
+    updated = (
+        db.query(Product)
+        .filter(Product.category == old_name)
+        .update({"category": new_name})
+    )
+    if updated == 0:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    db.commit()
+    return {"updated": updated, "new_name": new_name}
+
+
+@router.delete(
+    "/",
+    dependencies=[Depends(requires_role("manager", "admin"))],
+)
+def delete_category(
+    name: str,
+    reassign_to: str | None = None,
+    db: Session = Depends(get_db),
+    user: User = Depends(get_current_user),
+):
+    """
+    Kategorie löschen.
+    - Mit reassign_to: alle Produkte auf neue Kategorie umhängen.
+    - Ohne: Kategorie auf NULL setzen.
+    """
+    q = db.query(Product).filter(Product.category == name)
+
+    if not q.first():
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    if reassign_to:
+        updated = q.update({"category": reassign_to})
+    else:
+        updated = q.update({"category": None})
+
+    db.commit()
+    return {"updated": updated, "reassigned_to": reassign_to}