InvokeAI/invokeai/app/services/urls/urls_base.py

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feat: refactor services folder/module structure Refactor services folder/module structure. **Motivation** While working on our services I've repeatedly encountered circular imports and a general lack of clarity regarding where to put things. The structure introduced goes a long way towards resolving those issues, setting us up for a clean structure going forward. **Services** Services are now in their own folder with a few files: - `services/{service_name}/__init__.py`: init as needed, mostly empty now - `services/{service_name}/{service_name}_base.py`: the base class for the service - `services/{service_name}/{service_name}_{impl_type}.py`: the default concrete implementation of the service - typically one of `sqlite`, `default`, or `memory` - `services/{service_name}/{service_name}_common.py`: any common items - models, exceptions, utilities, etc Though it's a bit verbose to have the service name both as the folder name and the prefix for files, I found it is _extremely_ confusing to have all of the base classes just be named `base.py`. So, at the cost of some verbosity when importing things, I've included the service name in the filename. There are some minor logic changes. For example, in `InvocationProcessor`, instead of assigning the model manager service to a variable to be used later in the file, the service is used directly via the `Invoker`. **Shared** Things that are used across disparate services are in `services/shared/`: - `default_graphs.py`: previously in `services/` - `graphs.py`: previously in `services/` - `paginatation`: generic pagination models used in a few services - `sqlite`: the `SqliteDatabase` class, other sqlite-specific things
2023-09-24 08:11:07 +00:00
from abc import ABC, abstractmethod
class UrlServiceBase(ABC):
"""Responsible for building URLs for resources."""
@abstractmethod
def get_image_url(self, image_name: str, thumbnail: bool = False) -> str:
"""Gets the URL for an image or thumbnail."""
pass