//INCLUDE

#include "ClassScheduleDB.h"
#include "ClassSchedule.rsg"

#include <s32file.h>
#include <eikenv.h>

CClassScheduleDB::CClassScheduleDB()
{
    TTime curTime;
    curTime.HomeTime();
    iWeekId = curTime.DayNoInWeek(); //得到白天的時間的數據在當前的星期中

    CArrayFixFlat<TClassScheduleDBStruct>* arrayDay = NULL;
	iArray = new(ELeave) CArrayFixFlat<TInt32>(1);       //構造數組，間隔大小為1

    for(TInt i=EWeek1; i<=EWeek7; i++)
    {
        arrayDay = new(ELeave) CArrayFixFlat<TClassScheduleDBStruct>(1); // 構造數組間隔大小為1
        for(TInt j=ECourse01; j<=ECourse10; j++)	//循環從第一節課到第十節課
        {
            TClassScheduleDBStruct db;					//第一變量，其中包含課程名、上課時間等
            db.iTime = 0;							//初始化時間為0
            arrayDay->AppendL(db);					//在數組中添加db中的項
        }
        iArray->AppendL((TInt32)arrayDay);			//將數組arrayDay中的項添加到數組iArray 中
    }
	TRAPD(r, ReadDBL());							//異常退出處理
    if(r!=KErrNone)
    {
        SaveDBL();									//如果沒有異常退出,就保存數據
    }
}

CClassScheduleDB::~CClassScheduleDB()
{
    CArrayFixFlat<TClassScheduleDBStruct>* arrayDay = NULL;
    for(TInt i=EWeek1; i<=EWeek7; i++)
    {
        arrayDay = (CArrayFixFlat<TClassScheduleDBStruct>*)iArray->At(i);  
        delete arrayDay;
    }
    delete iArray;
}

void CClassScheduleDB::ReadDBL()
{
    RFileReadStream reader;
    reader.PushL();
    User::LeaveIfError(reader.Open(CEikonEnv::Static()->FsSession(), KClassScheduleFileName, EFileRead));  //打開一個文件
    CArrayFixFlat<TClassScheduleDBStruct>* arrayDay = NULL;        //  構造一個數組初始化為空
    TInt32 len = 0;
    for(TInt i=EWeek1; i<=EWeek7; i++)                        //循環從周一到周末
    {
        arrayDay = (CArrayFixFlat<TClassScheduleDBStruct> *)iArray->At(i);	//得到數組中的值(每一天的信息)
        for(TInt j=ECourse01; j<=ECourse10; j++)						//循環從第一節課到第十節課
        {
            TClassScheduleDBStruct &db = arrayDay->At(j);			//得到數組中的信息(每節課的信息)
    
            len = reader.ReadInt32L();
            if(len)
                reader.ReadL((TUint16*)db.iAddr.Ptr(), len);	//讀取上課地點信息

            db.iAddr.SetLength(len);
            len = reader.ReadInt32L();
            if(len)
                reader.ReadL((TUint16*)db.iName.Ptr(), len);	//讀取課程名信息 
            db.iName.SetLength(len);
    
            len = reader.ReadInt32L();
            if(len)
                reader.ReadL((TUint16*)db.iTeacher.Ptr(), len);	//讀取授課教師信息
            db.iTeacher.SetLength(len);

            len = reader.ReadInt32L();
            if(len)
                reader.ReadL((TUint16*)db.iRemark.Ptr(), len);	//讀取備注信息
            db.iRemark.SetLength(len);

            TUint32 high = reader.ReadUint32L();
            TUint32 low = reader.ReadUint32L();
            db.iTime.Set(high, low);							//獲得時間信息
        }
    }
    CleanupStack::PopAndDestroy(); //reader
}

void CClassScheduleDB::SaveDBL()
{
    RFileWriteStream writer;
    writer.PushL();
    User::LeaveIfError(writer.Replace(CEikonEnv::Static()->FsSession(), KClassScheduleFileName, EFileWrite)); //向數據庫中寫數據
    CArrayFixFlat<TClassScheduleDBStruct>* arrayDay = NULL;	//定義一個數組對象,初始化為NULL
    TInt32 len = 0;
    for(TInt i=EWeek1; i<=EWeek7; i++)					//循環從周一到周末
    {
        arrayDay = (CArrayFixFlat<TClassScheduleDBStruct> *)iArray->At(i);	//得到星期的信息
        for(TInt j=ECourse01; j<=ECourse10; j++)			//循環從第一節課到第十節課
        {
            TClassScheduleDBStruct &db = arrayDay->At(j);		//得到課程的信息

            len = db.iAddr.Length();                                   
            writer.WriteInt32L(len);
            if(len)											//寫入上課地點到數據庫
                writer.WriteL(db.iAddr.Ptr(), len);

            len = db.iName.Length();
            writer.WriteInt32L(len);
            if(len)											//寫入課程名到數據庫
                writer.WriteL(db.iName.Ptr(), len);

            len = db.iTeacher.Length();
            writer.WriteInt32L(len);
            if(len)											//寫入授課教師信息到數據庫
                writer.WriteL(db.iTeacher.Ptr(), len);

            len = db.iRemark.Length();             
            writer.WriteInt32L(len);
            if(len)											//寫入備注到數據庫
                writer.WriteL(db.iRemark.Ptr(), len);

            writer.WriteUint32L(db.iTime.High());			//寫時間高位
            writer.WriteUint32L(db.iTime.Low());			//寫時間低位
        }
    }
    writer.CommitL();										//提交        
    CleanupStack::PopAndDestroy(); //writer
}

//----------------------------------------------------
//將時間轉換為字符串的形勢
//----------------------------------------------------

TDesC &GetTimeStringFromTInt64(TInt64 &aInt64)
{
    TBuf<32> timeString;
    _LIT(KDateString,"%-B%:0%J%:1%T%:3%+B");
    TTime time(aInt64);
    time.FormatL(timeString,KDateString);
    return timeString;
}