mirror of
https://github.com/invoke-ai/InvokeAI
synced 2024-08-30 20:32:17 +00:00
402cf9b0ee
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
130 lines
3.7 KiB
Python
130 lines
3.7 KiB
Python
from abc import ABC, abstractmethod
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from typing import Callable, Optional
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from PIL.Image import Image as PILImageType
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from invokeai.app.invocations.metadata import ImageMetadata
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from invokeai.app.services.image_records.image_records_common import (
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ImageCategory,
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ImageRecord,
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ImageRecordChanges,
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ResourceOrigin,
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)
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from invokeai.app.services.images.images_common import ImageDTO
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from invokeai.app.services.shared.pagination import OffsetPaginatedResults
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class ImageServiceABC(ABC):
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"""High-level service for image management."""
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_on_changed_callbacks: list[Callable[[ImageDTO], None]]
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_on_deleted_callbacks: list[Callable[[str], None]]
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def __init__(self) -> None:
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self._on_changed_callbacks = list()
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self._on_deleted_callbacks = list()
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def on_changed(self, on_changed: Callable[[ImageDTO], None]) -> None:
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"""Register a callback for when an image is changed"""
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self._on_changed_callbacks.append(on_changed)
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def on_deleted(self, on_deleted: Callable[[str], None]) -> None:
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"""Register a callback for when an image is deleted"""
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self._on_deleted_callbacks.append(on_deleted)
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def _on_changed(self, item: ImageDTO) -> None:
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for callback in self._on_changed_callbacks:
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callback(item)
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def _on_deleted(self, item_id: str) -> None:
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for callback in self._on_deleted_callbacks:
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callback(item_id)
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@abstractmethod
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def create(
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self,
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image: PILImageType,
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image_origin: ResourceOrigin,
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image_category: ImageCategory,
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node_id: Optional[str] = None,
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session_id: Optional[str] = None,
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board_id: Optional[str] = None,
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is_intermediate: bool = False,
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metadata: Optional[dict] = None,
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workflow: Optional[str] = None,
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) -> ImageDTO:
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"""Creates an image, storing the file and its metadata."""
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pass
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@abstractmethod
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def update(
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self,
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image_name: str,
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changes: ImageRecordChanges,
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) -> ImageDTO:
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"""Updates an image."""
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pass
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@abstractmethod
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def get_pil_image(self, image_name: str) -> PILImageType:
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"""Gets an image as a PIL image."""
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pass
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@abstractmethod
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def get_record(self, image_name: str) -> ImageRecord:
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"""Gets an image record."""
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pass
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@abstractmethod
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def get_dto(self, image_name: str) -> ImageDTO:
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"""Gets an image DTO."""
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pass
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@abstractmethod
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def get_metadata(self, image_name: str) -> ImageMetadata:
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"""Gets an image's metadata."""
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pass
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@abstractmethod
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def get_path(self, image_name: str, thumbnail: bool = False) -> str:
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"""Gets an image's path."""
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pass
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@abstractmethod
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def validate_path(self, path: str) -> bool:
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"""Validates an image's path."""
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pass
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@abstractmethod
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def get_url(self, image_name: str, thumbnail: bool = False) -> str:
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"""Gets an image's or thumbnail's URL."""
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pass
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@abstractmethod
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def get_many(
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self,
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offset: int = 0,
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limit: int = 10,
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image_origin: Optional[ResourceOrigin] = None,
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categories: Optional[list[ImageCategory]] = None,
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is_intermediate: Optional[bool] = None,
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board_id: Optional[str] = None,
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) -> OffsetPaginatedResults[ImageDTO]:
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"""Gets a paginated list of image DTOs."""
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pass
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@abstractmethod
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def delete(self, image_name: str):
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"""Deletes an image."""
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pass
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@abstractmethod
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def delete_intermediates(self) -> int:
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"""Deletes all intermediate images."""
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pass
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@abstractmethod
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def delete_images_on_board(self, board_id: str):
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"""Deletes all images on a board."""
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pass
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