284 lines
7.5 KiB
Python
284 lines
7.5 KiB
Python
import json
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import logging
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import os
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import uuid
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from dataclasses import dataclass, field
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from typing import Any
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from aiohttp import web
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from .config import Config
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from .Emitter import Emitter
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from .encoder import Encoder
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from .EventsSubscriber import Event, Events, EventsSubscriber
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from .Singleton import Singleton
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LOG = logging.getLogger("presets")
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@dataclass(kw_only=True)
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class Preset:
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id: str = field(default_factory=lambda: str(uuid.uuid4()))
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"""The id of the preset."""
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name: str
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"""The name of the preset."""
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format: str
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"""The format of the preset."""
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args: dict[str, list[str] | bool] = field(default_factory=dict)
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"""The arguments of the preset."""
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postprocessors: list = field(default_factory=list)
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"""The postprocessors of the preset."""
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folder: str = ""
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"""The default download folder to use if non is given."""
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template: str = ""
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"""The default template to use if non is given."""
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cookies: str = ""
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"""The default cookies to use if non is given."""
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default: bool = False
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def serialize(self) -> dict:
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return self.__dict__
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def json(self) -> str:
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return Encoder().encode(self.serialize())
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def get(self, key: str, default: Any = None) -> Any:
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return self.serialize().get(key, default)
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class Presets(metaclass=Singleton):
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"""
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This class is used to manage the presets.
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"""
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_presets: list[Preset] = []
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"""The list of presets."""
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_instance = None
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"""The instance of the class."""
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_default_presets: list[Preset] = []
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def __init__(self, file: str | None = None, emitter: Emitter | None = None, config: Config | None = None):
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Presets._instance = self
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config = config or Config.get_instance()
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self._file: str = file or os.path.join(config.config_path, "presets.json")
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self._emitter: Emitter = emitter or Emitter.get_instance()
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if os.path.exists(self._file) and "600" != oct(os.stat(self._file).st_mode)[-3:]:
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try:
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os.chmod(self._file, 0o600)
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except Exception:
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pass
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def handle_event(_, e: Event):
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self.save(**e.data)
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with open(os.path.join(os.path.dirname(__file__), "presets.json")) as f:
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self._default_presets = [Preset(**preset) for preset in json.load(f)]
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EventsSubscriber.get_instance().subscribe(Events.PRESETS_ADD, f"{__class__}.save", handle_event)
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@staticmethod
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def get_instance() -> "Presets":
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"""
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Get the instance of the class.
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Returns:
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Presets: The instance of the class
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"""
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if not Presets._instance:
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Presets._instance = Presets()
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return Presets._instance
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async def on_shutdown(self, _: web.Application):
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pass
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def attach(self, _: web.Application):
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"""
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Attach the work to the aiohttp application.
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Args:
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_ (web.Application): The aiohttp application.
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Returns:
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None
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"""
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self.load()
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def get_all(self) -> list[Preset]:
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"""Return the presets."""
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return self._default_presets + self._presets
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def load(self) -> "Presets":
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"""
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Load the Presets.
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Returns:
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Presets: The current instance.
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"""
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self.clear()
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if not os.path.exists(self._file) or os.path.getsize(self._file) < 10:
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return self
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LOG.info(f"Loading presets from '{self._file}'.")
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try:
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with open(self._file) as f:
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presets = json.load(f)
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except Exception as e:
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LOG.error(f"Failed to parse presets from '{self._file}'. '{e}'.")
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return self
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if not presets or len(presets) < 1:
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LOG.info(f"No presets were defined in '{self._file}'.")
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return self
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needSaving = False
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for i, preset in enumerate(presets):
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try:
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if "id" not in preset:
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preset["id"] = str(uuid.uuid4())
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needSaving = True
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preset = Preset(**preset)
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self._presets.append(preset)
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except Exception as e:
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LOG.error(f"Failed to parse preset at list position '{i}'. '{e!s}'.")
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continue
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if needSaving:
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LOG.info("Saving presets due to missing ids.")
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self.save(self._presets)
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return self
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def clear(self) -> "Presets":
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"""
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Clear all presets
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Returns:
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Presets: The current instance.
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"""
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if len(self._presets) < 1:
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return self
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self._presets.clear()
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return self
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def validate(self, preset: Preset | dict) -> bool:
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"""
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Validate the preset.
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Args:
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preset (Preset|dict): The preset to validate.
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Returns:
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bool: True if the preset is valid, False otherwise.
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"""
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if not isinstance(preset, dict):
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if not isinstance(preset, Preset):
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msg = "Invalid preset type."
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raise ValueError(msg) # noqa: TRY004
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preset = preset.serialize()
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if not preset.get("id"):
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msg = "No id found."
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raise ValueError(msg)
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if not preset.get("name"):
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msg = "No name found."
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raise ValueError(msg)
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if not preset.get("format"):
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msg = "No format found."
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raise ValueError(msg)
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if preset.get("args") and not isinstance(preset.get("args"), dict):
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msg = "Invalid args type. expected dict."
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raise ValueError(msg)
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if preset.get("postprocessors") and not isinstance(preset.get("postprocessors"), list):
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msg = "Invalid postprocessors type. expected list."
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raise ValueError(msg)
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return True
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def save(self, presets: list[Preset | dict]) -> "Presets":
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"""
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Save the presets.
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Args:
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presets (list[Preset]): The presets to save.
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Returns:
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Presets: The current instance.
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"""
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for i, preset in enumerate(presets):
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try:
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if not isinstance(preset, Preset):
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preset = Preset(**preset)
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presets[i] = preset
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except Exception as e:
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LOG.error(f"Failed to save preset '{i}' due to parsing error. '{e!s}'.")
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continue
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try:
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self.validate(preset)
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except ValueError as e:
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LOG.error(f"Failed to validate preset '{i}: {preset.name}'. '{e}'.")
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continue
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try:
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with open(self._file, "w") as f:
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json.dump(obj=[preset.serialize() for preset in presets if preset.default is False], fp=f, indent=4)
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LOG.info(f"Presets saved to '{self._file}'.")
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except Exception as e:
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LOG.error(f"Failed to save presets to '{self._file}'. '{e!s}'.")
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return self
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def get(self, id: str | None = None, name: str | None = None) -> Preset | None:
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"""
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Get the preset by id or name.
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Args:
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id (str|None): The id of the preset.
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name (str|None): The name of the preset.
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Returns:
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Preset|None: The preset if found, None otherwise.
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"""
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if not id and not name:
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return None
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for preset in self.get_all():
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if preset.id == id:
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return preset
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if preset.name == name:
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return preset
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return None
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