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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using OpenAuth.App.Request;
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using OpenAuth.App.Response;
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using SqlSugar;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace OpenAuth.App.BasicQueryService
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{
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public class CommonDataManager
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{
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ISqlSugarClient client;
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public CommonDataManager(ISqlSugarClient client)
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{
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this.client = client;
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}
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/// <summary>
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/// wkt转geom数据
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/// </summary>
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/// <param name="wkt"></param>
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/// <param name="wkid"></param>
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/// <returns></returns>
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public string WktToGeometry(string wkt, int wkid)
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{
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StringBuilder geomsql = new StringBuilder();
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geomsql.AppendFormat(" SELECT CAST(st_geomfromtext('{0}',{1}) AS text) geom", wkt, wkid);
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var model_geom = client.SqlQueryable<dynamic>(geomsql.ToString()).First();
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return model_geom.geom;
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}
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/// <summary>
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/// Pgsql获取GeoJson数据
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/// </summary>
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/// <param name="req"></param>
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/// <param name="_configuration"></param>
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/// <returns></returns>
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public JToken PgsqlGeoJsonCommon(QueryGeoJsonCommonReq req)
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{
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//如果有的参数为空，设置参数的默认值
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req.init();
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//查询列的数据
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StringBuilder sqlColumn = new StringBuilder();
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sqlColumn.AppendFormat(" select {1} from {0} {3} order by \"{2}\"", req.tablename, req.column, req.order,
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req.where);
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StringBuilder sqlGeo = new StringBuilder();
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sqlGeo.AppendFormat(" select st_asgeojson(\"{0}\") geom from \"{1}\" {3} order by \"{2}\"", req.geom,
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req.tablename, req.order, req.where);
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return PgsqlGeoJsonCommon(sqlColumn, sqlGeo, req.pageIndex, req.limit);
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}
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/// <summary>
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/// 查询GeoJson公共方法
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/// </summary>
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/// <param name="sqlColumn"></param>
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/// <param name="sqlGeom"></param>
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/// <param name="pageIndex"></param>
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/// <param name="pageSize"></param>
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/// <param name="_configuration"></param>
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/// <returns></returns>
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public JToken PgsqlGeoJsonCommon(StringBuilder sqlColumn, StringBuilder sqlGeom, int pageIndex, int pageSize)
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{
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//获取到数据库操作实例
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int total = 0;
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int totalPage = 0;
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//查询列
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var dt_properties = client.SqlQueryable<dynamic>(sqlColumn.ToString())
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.ToPageList(pageIndex, pageSize, ref total, ref totalPage);
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//列数据转换为字符串
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string str_properties = JsonConvert.SerializeObject(dt_properties);
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//列数据转换为json对象
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JToken jtoken_properties = (JToken)JsonConvert.DeserializeObject(str_properties);
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//查询geojson数据
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var dt_geom = client.SqlQueryable<dynamic>(sqlGeom.ToString()).ToDataTablePage(pageIndex, pageSize);
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//组装最终数据
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JObject obj = new JObject();
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JArray array = new JArray();
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obj.Add("type", "FeatureCollection");
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obj.Add("totalNumber", total);
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obj.Add("totalPage", totalPage);
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//遍历geojson数据
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for (var i = 0; i < dt_geom.Rows.Count; i++)
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{
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//行数据
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DataRow item = dt_geom.Rows[i];
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//单条geojson
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string _geom = item["geom"] == DBNull.Value ? "" : item["geom"].ToString();
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//给数据赋值
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JObject featureObj = new JObject();
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featureObj.Add("type", "Feature");
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featureObj.Add("geometry", (JToken)JsonConvert.DeserializeObject(_geom));
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featureObj.Add("properties", jtoken_properties[i]);
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//添加到数组
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array.Add(featureObj);
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}
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obj.Add("features", array);
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return obj;
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}
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/// <summary>
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/// 获取列名
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/// </summary>
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/// <param name="tablename"></param>
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/// <returns></returns>
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public List<dynamic> SearchColumnsList(string tablename)
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{
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//查询列名和注释描述
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StringBuilder columnSql = new StringBuilder();
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columnSql.AppendFormat(
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@$" SELECT a.attname column_name,col_description(a.attrelid,a.attnum) as description,format_type(a.atttypid,a.atttypmod) as column_type
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FROM pg_class as c,pg_attribute as a
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where c.relname = '{tablename}'
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and a.attrelid = c.oid
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and a.attnum>0
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and attstattarget = -1");
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//查询结果
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var column_list = client.SqlQueryable<dynamic>(columnSql.ToString()).ToList();
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return column_list;
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}
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/// <summary>
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/// 矢量切片公共方法
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/// </summary>
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/// <param name="req"></param>
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/// <param name="_configuration"></param>
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/// <returns></returns>
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public byte[] VectorTile(VectorTileSearchModel req)
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{
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req.Init();
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List<double> lons = getLon(req.x, req.z);
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List<double> lats = getLat(req.y, req.z);
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double lonmin = lons[0];
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double lonmax = lons[1];
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double latmin = lats[1];
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double latmax = lats[0];
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StringBuilder sql = new StringBuilder();
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sql.AppendFormat(
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$" SELECT ST_AsMVT(tile, '{req.source_layer}', 4096, 'geom') tile FROM (SELECT {req.field}ST_AsMVTGeom(geom, ST_Transform(ST_MakeEnvelope({lonmin},{latmin},{lonmax},{latmax}, 4326),4326),4096, 256, true) AS geom FROM public.{req.table} where {req.filter} ) AS tile");
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var dataTable = client.Ado.GetDataTable(sql.ToString());
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byte[] result = (Byte[])dataTable.Rows[0]["tile"];
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return result;
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}
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/// <summary>
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/// 查询最新的主键
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/// </summary>
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/// <param name="_columm"></param>
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/// <param name="tablename"></param>
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/// <param name="_gid_const"></param>
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/// <returns></returns>
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public string GetMaxKeyVal(string _column, string tablename, int _gid_const)
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{
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string _val = "";
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//查询最大的gid
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var column_list = SearchColumnsList(tablename);
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string _type = column_list[0].column_type;
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if (_type != "integer")
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{
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_val = Guid.NewGuid().ToString();
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return _val;
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}
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var _maxgid = client
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.SqlQueryable<dynamic>(
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$"SELECT max(\"{_column}\") \"maxGid\" FROM \"{tablename}\" where \"{_column}\" < 6000000").First()
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.maxGid;
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//gid为空时，说明一条数据都没有
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if (_maxgid == null)
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_val = _gid_const.ToString();
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else
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{
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//如果大于设定值，在此基础上加一，否则设置为默认值
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if (_maxgid >= _gid_const)
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_val = (_maxgid + 1).ToString();
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else
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_val = _gid_const.ToString();
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}
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return _val;
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}
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/// <summary>
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/// 格式化wkt数据，兼容多个地块
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/// </summary>
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/// <param name="_wkt"></param>
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/// <param name="_newType"></param>
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/// <param name="_len"></param>
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/// <returns></returns>
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public string WktDataConvert(string _wkt, string _newType, int _len)
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{
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//使用逗号分割
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var list = _wkt.Split(",");
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//返回值
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StringBuilder res = new StringBuilder();
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//扩展的维度，用 0补齐
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string extStr = "";
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for (int i = 0; i < list.Length; i++)
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{
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//当前项
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var item = list[i];
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extStr = GetWktDemension(item, _len);
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if (i == 0)
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{
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//第一项数据先去除前缀
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item = item.Substring(item.IndexOf("(")).TrimStart('(');
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if (_newType == "MULTIPOLYGON ZM")
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item = "(((" + item;
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else if (_newType == "MULTILINESTRING")
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item = "((" + item;
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//扩展后的值
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item = _newType + item + extStr;
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}
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else if (i == list.Length - 1)
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{
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//最后一项
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item = item.TrimEnd(')');
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if (_newType == "MULTIPOLYGON ZM")
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item = item + extStr + ")))";
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else if (_newType == "MULTILINESTRING")
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item = item + extStr + "))";
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}
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else
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{
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//判断是否存在右括号
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if (item.IndexOf(")") > -1)
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{
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//在第一个右括号前插入维度数据
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item = item.Insert(item.IndexOf(")"), extStr);
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}
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else
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{
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//在后面追加维度数据
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item = item + extStr;
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}
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}
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//追加数据
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res.Append($"{item},");
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}
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string strRes = res.ToString();
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//把最后一个逗号截取掉
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return strRes.Substring(0, strRes.Length - 1);
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}
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private string GetWktDemension(string item, int _len)
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{
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if (item.IndexOf("(") > -1)
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{
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item = item.Substring(item.IndexOf("("));
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item = item.TrimStart('(');
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}
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string extStr = "";
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//数据的维度
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var _count = _len - item.Split(" ", StringSplitOptions.RemoveEmptyEntries).Length;
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//扩展维度
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if (_count == 1)
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extStr = " 0";
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else if (_count == 2)
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extStr = " 0 0";
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return extStr;
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}
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#region Util
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/// <summary>
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/// 瓦片转经度
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/// </summary>
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/// <param name="x">列号</param>
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/// <param name="z">缩放级别</param>
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/// <returns></returns>
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public static double tile2lon(int x, int z)
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{
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return x / Math.Pow(2.0, z) * 360.0 - 180;
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}
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/// <summary>
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/// 瓦片转纬度
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/// </summary>
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/// <param name="y">行号</param>
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/// <param name="z">缩放级别</param>
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/// <returns></returns>
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public static double tile2lat(int y, int z)
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{
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double n = Math.PI - (2.0 * Math.PI * y) / Math.Pow(2.0, z);
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return Math.Atan(Math.Sinh(n)) * 180 / Math.PI;
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}
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/// <summary>
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/// 获取经度最大值和经度最小值
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/// </summary>
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/// <param name="x">列号</param>
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/// <param name="z">缩放级别</param>
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/// <returns></returns>
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public static List<double> getLon(int x, int z)
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{
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List<double> lonExtent = new List<double>();
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lonExtent.Add(tile2lon(x, z));
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lonExtent.Add(tile2lon(x + 1, z));
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return lonExtent;
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}
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/// <summary>
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/// 获取纬度最大值和经度最小值
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/// </summary>
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/// <param name="y">列号</param>
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/// <param name="z">缩放级别</param>
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/// <returns></returns>
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public static List<double> getLat(int y, int z)
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{
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List<double> latExtent = new List<double>();
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latExtent.Add(tile2lat(y, z));
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latExtent.Add(tile2lat(y + 1, z));
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return latExtent;
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}
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#endregion
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public byte[] VectorTile1(VectorTileSearchModel req)
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{
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req.Init();
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List<double> lons = getLon(req.x, req.z);
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List<double> lats = getLat(req.y, req.z);
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double lonmin = lons[0];
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double lonmax = lons[1];
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double latmin = lats[1];
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double latmax = lats[0];
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StringBuilder sql = new StringBuilder();
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sql.AppendFormat(
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$" SELECT ST_AsMVT(tile, '{req.source_layer}', 4096, 'geom') tile FROM (SELECT {req.field}ST_AsMVTGeom(geometry, ST_Transform(ST_MakeEnvelope({lonmin},{latmin},{lonmax},{latmax}, 4326),4326),4096, 256, true) AS geom FROM public.{req.table} where {req.filter} ) AS tile");
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var dataTable = client.Ado.GetDataTable(sql.ToString());
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byte[] result = (Byte[])dataTable.Rows[0]["tile"];
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return result;
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}
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}
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}
|
