80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
from collections import defaultdict, deque
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from typing import Any
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from app.services.tjnetwork import get_network_link_nodes
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VALVE_LINK_TYPE = "valve"
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def _parse_link_entry(link_entry: str) -> tuple[str, str, str, str]:
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parts = link_entry.split(":", 3)
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if len(parts) != 4:
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raise ValueError(f"Invalid link entry format: {link_entry}")
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return parts[0], parts[1], parts[2], parts[3]
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def valve_isolation_analysis(
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network: str, accident_elements: str | list[str]
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) -> dict[str, Any]:
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"""
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关阀搜索/分析：基于拓扑结构确定事故隔离所需关阀。
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:param network: 模型名称
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:param accident_elements: 事故点（节点或管道/泵/阀门ID），可以是单个ID字符串或ID列表
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:return: dict，包含受影响节点、必须关闭阀门、可选阀门等信息
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"""
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if isinstance(accident_elements, str):
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target_elements = [accident_elements]
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else:
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target_elements = accident_elements
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start_nodes = set()
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adjacency: dict[str, set[str]] = defaultdict(set)
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valve_links: dict[str, tuple[str, str]] = {}
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for link_entry in get_network_link_nodes(network):
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link_id, link_type, node1, node2 = _parse_link_entry(link_entry)
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link_type_name = str(link_type).lower()
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if link_type_name == VALVE_LINK_TYPE:
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valve_links[link_id] = (node1, node2)
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continue
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adjacency[node1].add(node2)
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adjacency[node2].add(node1)
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affected_nodes: set[str] = set()
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queue = deque(start_nodes)
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while queue:
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node = queue.popleft()
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if node in affected_nodes:
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continue
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affected_nodes.add(node)
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for neighbor in adjacency.get(node, []):
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if neighbor not in affected_nodes:
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queue.append(neighbor)
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must_close_valves: list[str] = []
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optional_valves: list[str] = []
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for valve_id, (node1, node2) in valve_links.items():
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in_node1 = node1 in affected_nodes
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in_node2 = node2 in affected_nodes
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if in_node1 and in_node2:
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optional_valves.append(valve_id)
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elif in_node1 or in_node2:
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must_close_valves.append(valve_id)
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must_close_valves.sort()
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optional_valves.sort()
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result = {
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"accident_elements": target_elements,
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"affected_nodes": sorted(affected_nodes),
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"must_close_valves": must_close_valves,
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"optional_valves": optional_valves,
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"isolatable": len(must_close_valves) > 0,
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}
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if len(target_elements) == 1:
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result["accident_element"] = target_elements[0]
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return result
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