void BookCopy::Update()
{
if (status_ == BookStatus::LENT)
{
NotifyOverdueIfNeeded();
}
else if (status_ == BookStatus::AT_LOAN_DESK)
{
bool need_nodify = false;
std::time_t today = Today();
while (std::difftime(today, due_date_) > 0.0)
{
// another one missed the book
request_queue_.erase(request_queue_.begin());
if (request_queue_.empty())
{
// all the people missed the book
status_ = BookStatus::ON_SHELF;
return;
}
else // move to next person
{
need_nodify = true;
due_date_ = nDaysLater(due_date_, kReserveDays);
}
}
// nodify the new person
NotifyRequest();
}
}
void NfcSettingsPrivate::InitializeNfcFeatureSupport()
{
TBool nfcAvailable = EFalse;
TRAPD(error, nfcAvailable = CFeatureDiscovery::IsFeatureSupportedL(KFeatureIdNfc));
if ( nfcAvailable )
{
iNfcFeature = NfcSettings::NfcFeatureSupported;
if ( !iRepository )
{
TRAP( error, iRepository = CRepository::NewL(KNfcCentralRepositoryUid) );
}
if ( error == KErrNone )
{
Cancel();
NotifyRequest();
}
else
{
ReportError( NfcSettings::NfcErrorModeRetrieval, error );
}
}
else if ( ProductSupportsNfcViaFirmwareUpdate() )
{
iNfcFeature = NfcSettings::NfcFeatureSupportedViaFirmwareUpdate;
}
}
void NfcSettingsPrivate::RunL()
{
const TInt status( iStatus.Int() );
User::LeaveIfError( status );
// A successfully completed CRepository::NotifyRequest() will set the key
// of the modified repository value as the TRequestStatus value. As the
// repository key is a TUint32, it is explicitly converted to a TInt
// to compare it to the TInt status value. This supresses a GCCE compilation
// warning. The value of KNfcModeSetting is 0x01, so it can be safely
// converted to a TInt without any loss of information.
if ( status == TInt(KNfcModeSetting) )
{
NotifyRequest();
}
}
bool BookCopy::Return(User *user)
{
if (status_ != BookStatus::LENT)
{
std::cout << "只能还回被借出的馆藏\n";
return false;
}
if (!(user->Return(id_))) // error info will be printed inside
return false;
// returned
if (request_queue_.empty()) // no one is waiting
{
status_ = BookStatus::ON_SHELF;
}
else // sb. has requested
{
status_ = BookStatus::AT_LOAN_DESK;
due_date_ = nDaysLater(kReserveDays);
NotifyRequest();
}
return true;
}
