40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
"""按动作 type 分配处理器，统一提供大屏 JSON 副本的执行入口"""
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from typing import Any
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from app.actions.add import AddHandler
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from app.actions.base import BaseActionHandler
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from app.actions.delete import DeleteHandler
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from app.actions.move import MoveHandler
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from app.actions.resize import ResizeHandler
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from app.actions.set_interaction import SetInteractionHandler
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from app.actions.update import UpdateHandler
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from app.actions.update_canvas import UpdateCanvasHandler
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from app.schemas.actions import Action
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from app.schemas.screen import Screen
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# 新增操作时在此注册，未实现的操作明确报错
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ACTION_HANDLERS: dict[str, BaseActionHandler[Any]] = {
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"delete": DeleteHandler(),
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"add": AddHandler(),
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"move": MoveHandler(),
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"resize": ResizeHandler(),
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"update": UpdateHandler(),
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"update_canvas": UpdateCanvasHandler(),
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"set_interaction": SetInteractionHandler(),
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}
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def apply_action(screen: Screen, action: Action) -> Screen:
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"""接收已通过 Schema 校验的动作，返回修改后的大屏副本，不保存或更新前端"""
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# 根据动作协议中的 type 查找对应处理器
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handler = ACTION_HANDLERS.get(action.type)
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# 如果类型尚未注册，明确报错，避免静默跳过动作
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if handler is None:
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raise ValueError(f"尚未实现动作处理器: {action.type}")
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# 委托处理器校验并修改副本，执行异常交由调用方统一处理
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return handler.apply(screen, action)
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