namespace APIJSON.NET

{

using APIJSON.NET.Services;

using Microsoft.Extensions.Options;

using Newtonsoft.Json.Linq;

using SqlSugar;

using System;

using System.Collections.Generic;

using System.Dynamic;

using System.Linq;

using AspectCore.Extensions.Reflection;

using System.Text.RegularExpressions;

public class SelectTable

{

private readonly IIdentityService _identitySvc;

private readonly ITableMapper _tableMapper;

private readonly DbContext db;

public SelectTable(IIdentityService identityService, ITableMapper tableMapper, DbContext _db)

{

_identitySvc = identityService;

_tableMapper = tableMapper;

db = _db;

}

/// <summary>

/// 判断表名是否正确

/// </summary>

/// <param name="table"></param>

/// <returns></returns>

public bool IsTable(string table)

{

return db.Db.DbMaintenance.GetTableInfoList().Any(it => it.Name.Equals(table, StringComparison.CurrentCultureIgnoreCase));

}

/// <summary>

/// 判断表的列名是否正确

/// </summary>

/// <param name="table"></param>

/// <param name="col"></param>

/// <returns></returns>

public bool IsCol(string table, string col)

{

return db.Db.DbMaintenance.GetColumnInfosByTableName(table).Any(it => it.DbColumnName.Equals(col, StringComparison.CurrentCultureIgnoreCase));

}

/// <summary>

/// 动态调用方法

/// </summary>

/// <param name="funcname"></param>

/// <param name="param"></param>

/// <param name="types"></param>

/// <returns></returns>

public object ExecFunc(string funcname,object[] param, Type[] types)

{

var method = typeof(FuncList).GetMethod(funcname);

var reflector = method.GetReflector();

var result = reflector.Invoke(new FuncList(), param);

//Type type = typeof(FuncList);

//Object obj = Activator.CreateInstance(type);

//MethodInfo mt = type.GetMethod(funcname,types);

//if (mt==null)

//{

// throw new Exception($"{funcname}没有获取到相应的函数");

//}

//return mt.Invoke(obj, param);

return result;

}

public (dynamic,int) GetTableData(string subtable, int page, int count, string json, JObject dd)

{

var role = _identitySvc.GetSelectRole(subtable);

if (!role.Item1)//没有权限返回异常

{

throw new Exception(role.Item2);

}

string selectrole = role.Item2;

subtable = _tableMapper.GetTableName(subtable);

JObject values = JObject.Parse(json);

page = values["page"] == null ? page : int.Parse(values["page"].ToString());

count = values["count"] == null ? count : int.Parse(values["count"].ToString());

values.Remove("page");

values.Remove("count");

var tb = sugarQueryable(subtable, selectrole, values, dd);

if (count > 0)

{

int total = 0;

return (tb.ToPageList(page, count,ref total),total);

}

else

{

return (tb.ToList(),tb.Count());

}

}

public dynamic GetFirstData(string subtable, string json, JObject dd)

{

var role = _identitySvc.GetSelectRole(subtable);

if (!role.Item1)//没有权限返回异常

{

throw new Exception(role.Item2);

}

string selectrole = role.Item2;

subtable = _tableMapper.GetTableName(subtable);

JObject values = JObject.Parse(json);

values.Remove("page");

values.Remove("count");

var tb = sugarQueryable(subtable, selectrole, values, dd).First();

var dic = (IDictionary<string, object>)tb;

foreach (var item in values.Properties().Where(it => it.Name.EndsWith("()")))

{

if (item.Value.IsValue())

{

string func = item.Value.ToString().Substring(0, item.Value.ToString().IndexOf("("));

string param = item.Value.ToString().Substring(item.Value.ToString().IndexOf("(") + 1).TrimEnd(')') ;

var types = new List<Type>();

var paramss = new List<object>();

foreach (var va in param.Split(","))

{

types.Add(typeof(object));

paramss.Add(tb.Where(it => it.Key.Equals(va)).Select(i => i.Value));

}

dic[item.Name] =ExecFunc(func, paramss.ToArray(), types.ToArray());

}

}

return tb;

}

private ISugarQueryable<ExpandoObject> sugarQueryable(string subtable, string selectrole, JObject values, JObject dd)

{

if (!IsTable(subtable))

{

throw new Exception($"表名{subtable}不正确！");

}

var tb = db.Db.Queryable(subtable, "tb");

if (values["@column"].IsValue())

{

var str = new System.Text.StringBuilder(100);

foreach (var item in values["@column"].ToString().Split(","))

{

string[] ziduan = item.Split(":");

if (ziduan.Length > 1)

{

if (IsCol(subtable,ziduan[0]) &&_identitySvc.ColIsRole(ziduan[0], selectrole.Split(",")))

{

str.Append(ziduan[0] + " as " + ziduan[1] + ",");

}

}

else

{

if (IsCol(subtable, item) && _identitySvc.ColIsRole(item, selectrole.Split(",")))

{

str.Append(item + ",");

}

}

}

if (string.IsNullOrEmpty(str.ToString()))

{

throw new Exception($"表名{subtable}没有可查询的字段！");

}

tb.Select(str.ToString().TrimEnd(','));

}

else

{

tb.Select(selectrole);

}

List<IConditionalModel> conModels = new List<IConditionalModel>();

foreach (var va in values)

{

string vakey = va.Key.Trim();

if (vakey.EndsWith("$"))//模糊查询

{

if (IsCol(subtable,vakey.TrimEnd('$')))

{

conModels.Add(new ConditionalModel() { FieldName = vakey.TrimEnd('$'), ConditionalType = ConditionalType.Like, FieldValue = va.Value.ToString() });

}

}

else if (vakey.EndsWith("{}"))//逻辑运算

{

string field = vakey.TrimEnd("{}".ToCharArray());

if (va.Value.HasValues)

{

conModels.Add(new ConditionalModel() { FieldName = field, ConditionalType = field.EndsWith("!") ? ConditionalType.NotIn : ConditionalType.In, FieldValue = va.Value.ToString() });

}

else

{

var ddt = new List<KeyValuePair<WhereType, ConditionalModel>>();

foreach (var and in va.Value.ToString().Split(','))

{

var model = new ConditionalModel();

model.FieldName = field;

if (and.StartsWith(">="))

{

model.ConditionalType = ConditionalType.GreaterThanOrEqual;

model.FieldValue = and.TrimStart(">=".ToCharArray());

}

else if (and.StartsWith("<="))

{

model.ConditionalType = ConditionalType.LessThanOrEqual;

model.FieldValue = and.TrimStart("<=".ToCharArray());

}

else if (and.StartsWith(">"))

{

model.ConditionalType = ConditionalType.GreaterThan;

model.FieldValue = and.TrimStart('>');

}

else if (and.StartsWith("<"))

{

model.ConditionalType = ConditionalType.LessThan;

model.FieldValue = and.TrimStart('<');

}

ddt.Add(new KeyValuePair<WhereType, ConditionalModel>((field.EndsWith("&") ? WhereType.And : WhereType.Or), model));

}

conModels.Add(new ConditionalCollections() { ConditionalList = ddt });

}

}

else if (vakey.EndsWith("@") && dd != null) // 关联上一个table

{

string[] str = va.Value.ToString().Split("/");

string value = string.Empty;

if (str.Length == 3)

{

value = dd[str[1]][str[2]].ToString();

}

else if (str.Length == 2)

{

value = dd[str[0]][str[1]].ToString();

}

conModels.Add(new ConditionalModel() { FieldName = vakey.TrimEnd('@'), ConditionalType = ConditionalType.Equal, FieldValue = value });

}

else if (IsCol(subtable,vakey)) //其他where条件

{

conModels.Add(new ConditionalModel() { FieldName = vakey, ConditionalType = ConditionalType.Equal, FieldValue = va.Value.ToString() });

}

}

tb.Where(conModels);

//排序

if (values["@order"].IsValue())

{

foreach (var item in values["@order"].ToString().Split(","))

{

if (IsCol(subtable,item.Replace("-", "")))

{

if (item.EndsWith("-"))

{

tb.OrderBy($"{item.Replace("-", " desc")}");

}

else

{

tb.OrderBy($"{item.ToString()}");

}

}

}

}

if (values["@group"].IsValue())

{

var str = new System.Text.StringBuilder(100);

foreach (var and in values["@group"].ToString().Split(','))

{

if (IsCol(subtable, and))

{

str.Append(and + ",");

}

}

tb.GroupBy(str.ToString().TrimEnd(','));

}

if (values["@having"].IsValue())

{

List<IConditionalModel> hw = new List<IConditionalModel>();

JArray jArray = JArray.Parse(values["@having"].ToString());

foreach (var item in jArray)

{

string and = item.ToString();

var model = new ConditionalModel();

if (and.Contains(">="))

{

model.FieldName = and.Split(new string[] { ">=" }, StringSplitOptions.RemoveEmptyEntries)[0];

model.ConditionalType = ConditionalType.GreaterThanOrEqual;

model.FieldValue = and.Split(new string[] { ">=" }, StringSplitOptions.RemoveEmptyEntries)[1];

}

else if (and.Contains("<="))

{

model.FieldName = and.Split(new string[] { "<=" }, StringSplitOptions.RemoveEmptyEntries)[0];

model.ConditionalType = ConditionalType.LessThanOrEqual;

model.FieldValue = and.Split(new string[] { "<=" }, StringSplitOptions.RemoveEmptyEntries)[1];

}

else if (and.Contains(">"))

{

model.FieldName = and.Split(new string[] { ">" }, StringSplitOptions.RemoveEmptyEntries)[0];

model.ConditionalType = ConditionalType.GreaterThan;

model.FieldValue = and.Split(new string[] { ">" }, StringSplitOptions.RemoveEmptyEntries)[1];

}

else if (and.Contains("<"))

{

model.FieldName = and.Split(new string[] { "<" }, StringSplitOptions.RemoveEmptyEntries)[0];

model.ConditionalType = ConditionalType.LessThan;

model.FieldValue = and.Split(new string[] { "<" }, StringSplitOptions.RemoveEmptyEntries)[1];

}

else if (and.Contains("!="))

{

model.FieldName = and.Split(new string[] { "!=" }, StringSplitOptions.RemoveEmptyEntries)[0];

model.ConditionalType = ConditionalType.NoEqual;

model.FieldValue = and.Split(new string[] { "!=" }, StringSplitOptions.RemoveEmptyEntries)[1];

}

else if (and.Contains("="))

{

model.FieldName = and.Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries)[0];

model.ConditionalType = ConditionalType.Equal;

model.FieldValue = and.Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries)[1];

}

hw.Add(model);

}

var d=db.Db.Context.Utilities.ConditionalModelToSql(hw);

tb.Having(d.Key,d.Value);

}

return tb;

}

}

}