165 lines
6.4 KiB
Python
165 lines
6.4 KiB
Python
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import logging
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from typing import List as PyList, Optional
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from fastapi import APIRouter, Depends, HTTPException, status, Response, Query
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.database import get_transactional_session
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from app.models import User as UserModel
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from app.models import Item as ItemModel
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from app.schemas.item import ItemCreate, ItemUpdate, ItemPublic
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from app.crud import item as crud_item
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from app.crud import list as crud_list
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from app.core.exceptions import ItemNotFoundError, ListPermissionError, ConflictError
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from app.auth import current_active_user
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logger = logging.getLogger(__name__)
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router = APIRouter()
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async def get_item_and_verify_access(
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item_id: int,
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db: AsyncSession = Depends(get_transactional_session),
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current_user: UserModel = Depends(current_active_user)
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) -> ItemModel:
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"""Dependency to get an item and verify the user has access to its list."""
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item_db = await crud_item.get_item_by_id(db, item_id=item_id)
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if not item_db:
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raise ItemNotFoundError(item_id)
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try:
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await crud_list.check_list_permission(db=db, list_id=item_db.list_id, user_id=current_user.id)
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except ListPermissionError as e:
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raise ListPermissionError(item_db.list_id, "access this item's list")
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return item_db
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@router.post(
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"/lists/{list_id}/items",
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response_model=ItemPublic,
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status_code=status.HTTP_201_CREATED,
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summary="Add Item to List",
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tags=["Items"]
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)
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async def create_list_item(
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list_id: int,
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item_in: ItemCreate,
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db: AsyncSession = Depends(get_transactional_session),
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current_user: UserModel = Depends(current_active_user),
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):
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"""Adds a new item to a specific list. User must have access to the list."""
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user_email = current_user.email
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logger.info(f"User {user_email} adding item to list {list_id}: {item_in.name}")
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try:
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await crud_list.check_list_permission(db=db, list_id=list_id, user_id=current_user.id)
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except ListPermissionError as e:
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raise ListPermissionError(list_id, "add items to this list")
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created_item = await crud_item.create_item(
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db=db, item_in=item_in, list_id=list_id, user_id=current_user.id
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)
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logger.info(f"Item '{created_item.name}' (ID: {created_item.id}) added to list {list_id} by user {user_email}.")
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return created_item
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@router.get(
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"/lists/{list_id}/items",
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response_model=PyList[ItemPublic],
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summary="List Items in List",
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tags=["Items"]
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)
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async def read_list_items(
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list_id: int,
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db: AsyncSession = Depends(get_transactional_session),
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current_user: UserModel = Depends(current_active_user),
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):
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"""Retrieves all items for a specific list if the user has access."""
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user_email = current_user.email
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logger.info(f"User {user_email} listing items for list {list_id}")
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try:
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await crud_list.check_list_permission(db=db, list_id=list_id, user_id=current_user.id)
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except ListPermissionError as e:
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raise ListPermissionError(list_id, "view items in this list")
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items = await crud_item.get_items_by_list_id(db=db, list_id=list_id)
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return items
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@router.put(
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"/lists/{list_id}/items/{item_id}",
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response_model=ItemPublic,
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summary="Update Item",
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tags=["Items"],
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responses={
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status.HTTP_409_CONFLICT: {"description": "Conflict: Item has been modified by someone else"}
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}
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)
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async def update_item(
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list_id: int,
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item_id: int,
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item_in: ItemUpdate,
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item_db: ItemModel = Depends(get_item_and_verify_access),
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db: AsyncSession = Depends(get_transactional_session),
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current_user: UserModel = Depends(current_active_user),
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):
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"""
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Updates an item's details (name, quantity, is_complete, price).
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User must have access to the list the item belongs to.
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The client MUST provide the current `version` of the item in the `item_in` payload.
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If the version does not match, a 409 Conflict is returned.
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Sets/unsets `completed_by_id` based on `is_complete` flag.
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"""
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user_email = current_user.email
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logger.info(f"User {user_email} attempting to update item ID: {item_id} with version {item_in.version}")
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try:
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updated_item = await crud_item.update_item(
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db=db, item_db=item_db, item_in=item_in, user_id=current_user.id
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)
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logger.info(f"Item {item_id} updated successfully by user {user_email} to version {updated_item.version}.")
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return updated_item
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except ConflictError as e:
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logger.warning(f"Conflict updating item {item_id} for user {user_email}: {str(e)}")
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raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(e))
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except Exception as e:
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logger.error(f"Error updating item {item_id} for user {user_email}: {str(e)}")
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raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="An unexpected error occurred while updating the item.")
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@router.delete(
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"/lists/{list_id}/items/{item_id}",
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status_code=status.HTTP_204_NO_CONTENT,
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summary="Delete Item",
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tags=["Items"],
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responses={
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status.HTTP_409_CONFLICT: {"description": "Conflict: Item has been modified, cannot delete specified version"}
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}
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)
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async def delete_item(
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list_id: int,
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item_id: int,
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expected_version: Optional[int] = Query(None, description="The expected version of the item to delete for optimistic locking."),
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item_db: ItemModel = Depends(get_item_and_verify_access),
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db: AsyncSession = Depends(get_transactional_session),
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current_user: UserModel = Depends(current_active_user),
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):
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"""
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Deletes an item. User must have access to the list the item belongs to.
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If `expected_version` is provided and does not match the item's current version,
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a 409 Conflict is returned.
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"""
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user_email = current_user.email
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if expected_version is not None and item_db.version != expected_version:
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logger.warning(
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f"Conflict deleting item {item_id} for user {user_email}. "
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f"Expected version {expected_version}, actual version {item_db.version}."
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)
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail=f"Item has been modified. Expected version {expected_version}, but current version is {item_db.version}. Please refresh."
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)
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await crud_item.delete_item(db=db, item_db=item_db)
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logger.info(f"Item {item_id} (version {item_db.version}) deleted successfully by user {user_email}.")
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return Response(status_code=status.HTTP_204_NO_CONTENT) |