Add admin account with user management endpoints

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/routers/admin.py

@@ -0,0 +1,146 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+
+from app.dependencies import get_db, get_current_admin, bearer_scheme
+from app.models.user import User
+from app.schemas.user import AdminUserCreate, AdminPasswordReset, AdminUserResponse, Token
+from app.utils.security import hash_password, create_token
+
+router = APIRouter(prefix="/api/admin", tags=["admin"])
+
+
+@router.get("/users", response_model=list[AdminUserResponse])
+async def list_users(
+    _: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(select(User).order_by(User.created_at))
+    return result.scalars().all()
+
+
+@router.post("/users", response_model=AdminUserResponse, status_code=status.HTTP_201_CREATED)
+async def create_user(
+    body: AdminUserCreate,
+    _: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(select(User).where(User.email == body.email))
+    if result.scalar_one_or_none():
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail="Email already registered")
+
+    user = User(
+        email=body.email,
+        password_hash=hash_password(body.password),
+        display_name=body.display_name or body.email.split("@")[0],
+        is_admin=False,
+    )
+    async with db.begin():
+        db.add(user)
+    await db.refresh(user)
+    return user
+
+
+@router.post("/users/{user_id}/reset-password", status_code=status.HTTP_204_NO_CONTENT)
+async def reset_password(
+    user_id: int,
+    body: AdminPasswordReset,
+    _: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+
+    async with db.begin():
+        user.password_hash = hash_password(body.new_password)
+
+
+@router.post("/users/{user_id}/disable", status_code=status.HTTP_204_NO_CONTENT)
+async def disable_user(
+    user_id: int,
+    current_admin: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    if user_id == current_admin.id:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Cannot disable your own account")
+
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+
+    async with db.begin():
+        user.is_disabled = True
+
+
+@router.post("/users/{user_id}/enable", status_code=status.HTTP_204_NO_CONTENT)
+async def enable_user(
+    user_id: int,
+    _: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+
+    async with db.begin():
+        user.is_disabled = False
+
+
+@router.delete("/users/{user_id}", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_user(
+    user_id: int,
+    current_admin: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    if user_id == current_admin.id:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Cannot delete your own account")
+
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+
+    async with db.begin():
+        await db.delete(user)
+
+
+@router.post("/users/{user_id}/impersonate", response_model=Token)
+async def impersonate_user(
+    user_id: int,
+    current_admin: User = Depends(get_current_admin),
+    db: AsyncSession = Depends(get_db),
+):
+    if user_id == current_admin.id:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Cannot impersonate yourself")
+
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+
+    return Token(access_token=create_token(user.id, admin_id=current_admin.id))
+
+
+@router.post("/unimpersonate", response_model=Token)
+async def unimpersonate(
+    credentials=Depends(bearer_scheme),
+    db: AsyncSession = Depends(get_db),
+):
+    from app.utils.security import decode_token_full
+
+    token = credentials.credentials
+    payload = decode_token_full(token)
+    admin_id = payload.get("admin_id") if payload else None
+    if not admin_id:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Not an impersonation token")
+
+    result = await db.execute(select(User).where(User.id == admin_id))
+    admin = result.scalar_one_or_none()
+    if not admin or not admin.is_admin:
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Admin not found")
+
+    return Token(access_token=create_token(admin.id))