25 lines
1004 B
Python
25 lines
1004 B
Python
"""动作处理器公共接口，供后端校验时修改大屏 JSON 副本，不操作前端画布"""
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from abc import ABC, abstractmethod
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from typing import Generic, TypeVar
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from app.schemas.actions.base import ActionModel
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from app.schemas.screen import Screen, ScreenNode
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ActionT = TypeVar("ActionT", bound=ActionModel)
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class BaseActionHandler(ABC, Generic[ActionT]):
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@abstractmethod
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def apply(self, screen: Screen, action: ActionT) -> Screen:
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"""检查动作能否执行，返回修改后的大屏副本，保留原始输入"""
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raise NotImplementedError
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def copy_target(self, screen: Screen, target_id: str) -> tuple[Screen, ScreenNode]:
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# 先确认目标存在，再复制，避免修改原始快照
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for index, node in enumerate(screen.nodes):
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if node.id == target_id:
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result = screen.model_copy(deep=True)
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return result, result.nodes[index]
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raise ValueError(f"目标组件不存在: {target_id}")
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