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using FLY.OBJComponents.IService;
using FObjBase;
using SQLite;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace FLY.OBJComponents.Server
{
public class BulkDbSQLite<TLc, TDb> : IBulkDbSQLiteService
where TLc : IDbBase, new()
where TDb : IDbBase, new()
{
DBTable<TDb> dbTable;
SQLiteHelper sqliteHelper;
Func<TLc, TDb> mapLc2Db;
Func<TDb, TLc> mapDb2Lc;
public long LastId { get; private set; }
public event PropertyChangedEventHandler PropertyChanged;
public BulkDbSQLite()
{
}
public void Init(DBTable<TDb> dbTable,
Func<TLc, TDb> mapLc2Db, Func<TDb, TLc> mapDb2Lc)
{
this.dbTable = dbTable;
this.sqliteHelper = dbTable.sqliteHelper;
this.mapLc2Db = mapLc2Db;
this.mapDb2Lc = mapDb2Lc;
//获取最后一行数据
LastId = dbTable.MaxID;
}
public void Add(TLc lc)
{
//添加 数据库必要的 field
lc.ID = dbTable.FreeID;
//SQLs
List<string> sqls = new List<string>();
sqls.Add(SQLiteHelper.GetInsertCommandText(mapLc2Db(lc)));
sqliteHelper.QueryTranAsync(sqls);
LastId = lc.ID;
}
public void AddRange(IEnumerable<TLc> lcs)
{
//SQLs
List<string> sqls = new List<string>();
foreach (var lc in lcs)
{
//添加 数据库必要的 field
lc.ID = dbTable.FreeID;
sqls.Add(SQLiteHelper.GetInsertCommandText(mapLc2Db(lc)));
}
sqliteHelper.QueryTranAsync(sqls);
LastId = lcs.Last().ID;
}
public async void GetTrend(Pack_GetTrendRequest request, AsyncCBHandler asyncDelegate, object asyncContext)
{
Pack_GetTrendReponse<TLc> reponse = new Pack_GetTrendReponse<TLc>();
reponse.Request = request;
if (request.Count > 400)//数量限制，避免死机
request.Count = 400;
else if (request.Count < 1)
request.Count = 1;
if (request.Interval < 1)//避免 /0
request.Interval = 1;
await Task.Factory.StartNew(() =>
{
List<TDb> dbs = null;
if (!request.IsSearchByTime)
{
if (request.Id <= 0)
dbs = dbTable.Find(
$"WHERE (ID % {request.Interval} = 0)" +
$" ORDER BY ID DESC" +
$" LIMIT {request.Count} OFFSET {-request.Id}");
else
dbs = dbTable.Find(
$"WHERE (ID <= {request.Id})" +
$" AND (ID % {request.Interval} = 0)" +
$" ORDER BY ID DESC" +
$" LIMIT {request.Count}");
}
else
{
dbs = dbTable.Find(
$"WHERE ( Time <= {request.Time.ToStringOfSQLiteFieldType()})" +
$" AND ( ID % {request.Interval} = 0)" +
$" ORDER BY ID DESC" +
$" LIMIT {request.Count}");
}
if (dbs.Count() == 0)
return;
//转为 Lc_XXX
List<TLc> lcs = new List<TLc>();
foreach (var db in dbs)
{
lcs.Add(mapDb2Lc(db));
}
//从尾向前排的！！！！
reponse.Values = lcs;
});
asyncDelegate(asyncContext, reponse);
}
}
public class BulkDbSQLite<TDb> : IBulkDbSQLiteService
where TDb : IDbBase, new()
{
DBTable<TDb> dbTable;
SQLiteHelper sqliteHelper;
public long LastId { get; private set; }
public event PropertyChangedEventHandler PropertyChanged;
public BulkDbSQLite()
{
}
public void Init(DBTable<TDb> dbTable)
{
this.dbTable = dbTable;
this.sqliteHelper = dbTable.sqliteHelper;
//获取最后一行数据
LastId = dbTable.MaxID;
}
public void Add(TDb lc)
{
//添加 数据库必要的 field
lc.ID = dbTable.FreeID;
//SQLs
List<string> sqls = new List<string>();
sqls.Add(SQLiteHelper.GetInsertCommandText(lc));
sqliteHelper.QueryTranAsync(sqls);
LastId = lc.ID;
}
public void AddRange(IEnumerable<TDb> lcs)
{
//SQLs
List<string> sqls = new List<string>();
foreach (var lc in lcs)
{
//添加 数据库必要的 field
lc.ID = dbTable.FreeID;
sqls.Add(SQLiteHelper.GetInsertCommandText(lc));
}
sqliteHelper.QueryTranAsync(sqls);
LastId = lcs.Last().ID;
}
public async void GetTrend(Pack_GetTrendRequest request, AsyncCBHandler asyncDelegate, object asyncContext)
{
Pack_GetTrendReponse<TDb> reponse = new Pack_GetTrendReponse<TDb>();
reponse.Request = request;
if (request.Count > 400)//数量限制，避免死机
request.Count = 400;
else if (request.Count < 1)
request.Count = 1;
if (request.Interval < 1)//避免 /0
request.Interval = 1;
await Task.Factory.StartNew(() =>
{
List<TDb> dbs = null;
if (!request.IsSearchByTime)
{
if (request.Id <= 0)
dbs = dbTable.Find(
$"WHERE (ID % {request.Interval} = 0)" +
$" ORDER BY ID DESC" +
$" LIMIT {request.Count} OFFSET {-request.Id}");
else
dbs = dbTable.Find(
$"WHERE (ID <= {request.Id})" +
$" AND (ID % {request.Interval} = 0)" +
$" ORDER BY ID DESC" +
$" LIMIT {request.Count}");
}
else
{
dbs = dbTable.Find(
$"WHERE ( Time <= {request.Time.ToStringOfSQLiteFieldType()})" +
$" AND ( ID % {request.Interval} = 0)" +
$" ORDER BY ID DESC" +
$" LIMIT {request.Count}");
}
if (dbs.Count() == 0)
return;
//从尾向前排的！！！！
reponse.Values = dbs;
});
asyncDelegate(asyncContext, reponse);
}
}
}