78 lines
2.9 KiB
Python
78 lines
2.9 KiB
Python
"""在大屏 JSON 副本上按路径更新组件属性，用于后端校验动作能否执行"""
|
|
|
|
from copy import deepcopy
|
|
|
|
from app.actions.base import BaseActionHandler
|
|
from app.schemas.actions import UpdateAction
|
|
from app.schemas.screen import Screen
|
|
|
|
|
|
class UpdateHandler(BaseActionHandler[UpdateAction]):
|
|
def apply(self, screen: Screen, action: UpdateAction) -> Screen:
|
|
result, target = self.copy_target(screen, action.target_id)
|
|
# 未设置的 style 视为空对象，只允许直接添加末级字段
|
|
if action.section == "style" and target.style is None:
|
|
target.style = {}
|
|
current = getattr(target, action.section)
|
|
for index, segment in enumerate(action.path):
|
|
last = index == len(action.path) - 1
|
|
location = f"{action.section} {action.path[: index + 1]!r}"
|
|
if isinstance(current, dict):
|
|
if not isinstance(segment, str):
|
|
raise ValueError(f"对象路径必须使用字符串键: {location}")
|
|
if not last and segment not in current:
|
|
raise ValueError(f"中间路径不存在: {location}")
|
|
elif isinstance(current, list):
|
|
if type(segment) is not int:
|
|
raise ValueError(f"数组路径必须使用整数下标: {location}")
|
|
if not 0 <= segment < len(current):
|
|
raise ValueError(f"数组下标越界: {location}")
|
|
else:
|
|
raise ValueError(f"路径无法继续访问，当前值不是对象或数组: {location}")
|
|
|
|
if last:
|
|
# 新值也复制，避免后续修改结果时影响 Action
|
|
current[segment] = deepcopy(action.value)
|
|
else:
|
|
current = current[segment]
|
|
return result
|
|
|
|
|
|
if __name__ == "__main__":
|
|
screen = Screen.model_validate(
|
|
{
|
|
"canvas": {"width": 1920, "height": 1080},
|
|
"nodes": [
|
|
{
|
|
"id": "sales-chart",
|
|
"type": "chart",
|
|
"layout": {"x": 100, "y": 200, "width": 400, "height": 300},
|
|
"props": {"option": {"title": {"text": "销售额", "show": True}}},
|
|
}
|
|
],
|
|
}
|
|
)
|
|
action = UpdateAction(
|
|
target_id="sales-chart",
|
|
section="props",
|
|
path=["option", "title", "text"],
|
|
value="月度销售额",
|
|
)
|
|
handler = UpdateHandler()
|
|
final_screen = handler.apply(screen, action)
|
|
print(final_screen.model_dump_json(indent=2))
|
|
print("原始标题:", screen.nodes[0].props["option"]["title"]["text"])
|
|
|
|
try:
|
|
handler.apply(
|
|
screen,
|
|
UpdateAction(
|
|
target_id="sales-chart",
|
|
section="props",
|
|
path=["missing", "text"],
|
|
value="新标题",
|
|
),
|
|
)
|
|
except ValueError as error:
|
|
print("无效路径:", error)
|