121 lines
3.8 KiB
Python
121 lines
3.8 KiB
Python
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"""
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灾害影响范围数据仓库
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负责 xian_hazard_zones 表的数据读取和写入
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"""
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from typing import List, Dict, Any, Optional
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from app.utils.db_helper import db_helper
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class HazardRepository:
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"""灾害影响范围数据访问层"""
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# ==================== 隐患点查询 ====================
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@staticmethod
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def get_all_hidden_danger_spots() -> List[Dict[str, Any]]:
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"""
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获取所有隐患点（含静态因子）
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Returns:
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隐患点列表，每个元素含: source_id, disaster_name, disaster_type,
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scale_grade, county, lon, lat, static_factors
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"""
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sql = """
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SELECT
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h.id AS source_id,
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h.disaster_name,
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h.disaster_type,
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h.scale_grade,
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h.county,
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rf.lon,
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rf.lat,
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rf.static_factors
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FROM xian_hidden_danger_spots h
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JOIN xian_risk_factors rf
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ON rf.source_id = h.id AND rf.source_type = 1
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WHERE h.is_delete = 0
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AND rf.is_delete = 0
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AND h.disaster_type IN ('滑坡', '泥石流', '山洪', '内涝', '崩塌')
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AND rf.lon IS NOT NULL
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AND rf.lat IS NOT NULL
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ORDER BY h.id
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"""
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rows = db_helper.execute_query(sql)
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return [{
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'source_id': r['source_id'],
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'disaster_name': r['disaster_name'],
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'disaster_type': r['disaster_type'],
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'scale_grade': r['scale_grade'],
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'county': r['county'],
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'lon': float(r['lon']),
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'lat': float(r['lat']),
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'static_factors': r.get('static_factors') or {}
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} for r in rows]
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# ==================== 影响范围写入 ====================
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@staticmethod
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def delete_existing_zones() -> int:
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"""逻辑删除已有影响范围记录"""
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sql = "UPDATE xian_hazard_zones SET is_delete = 1 WHERE is_delete = 0"
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return db_helper.execute_update(sql)
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@staticmethod
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def insert_hazard_zone(source_id: int, disaster_type: str,
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zone_wkt: str, path_wkt: Optional[str]) -> int:
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"""
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插入单条影响范围记录
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Args:
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source_id: 隐患点ID
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disaster_type: 灾害类型
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zone_wkt: 影响范围 POLYGON WKT
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path_wkt: 影响路径 LINESTRING WKT (可为None)
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Returns:
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新插入记录的ID
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"""
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if path_wkt:
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sql = """
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INSERT INTO xian_hazard_zones (source_id, disaster_type, zone_geom, path_geom)
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VALUES (%s, %s, ST_GeomFromText(%s, 4326), ST_GeomFromText(%s, 4326))
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RETURNING id
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"""
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row = db_helper.execute_query_one(sql, (source_id, disaster_type, zone_wkt, path_wkt))
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else:
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sql = """
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INSERT INTO xian_hazard_zones (source_id, disaster_type, zone_geom)
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VALUES (%s, %s, ST_GeomFromText(%s, 4326))
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RETURNING id
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"""
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row = db_helper.execute_query_one(sql, (source_id, disaster_type, zone_wkt))
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return row['id'] if row else 0
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@staticmethod
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def batch_insert_zones(records: List[Dict[str, Any]]) -> int:
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"""
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批量插入影响范围记录
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Args:
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records: [{source_id, disaster_type, zone_wkt, path_wkt}, ...]
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Returns:
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成功插入的记录数
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"""
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count = 0
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for rec in records:
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hid = HazardRepository.insert_hazard_zone(
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rec['source_id'],
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rec['disaster_type'],
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rec['zone_wkt'],
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rec.get('path_wkt')
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)
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if hid > 0:
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count += 1
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return count
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# 全局实例
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hazard_repository = HazardRepository()
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