/** User starts a war against a city. If the city is empty now, it's gonna occupy it directly.
* 参战某城市,
* Return: An object of War. If failed to create, return null
*/
/** User starts a war against a city. If the city is empty now, it's gonna occupy it directly.
* 参战某城市,
* Return: An object of War. If failed to create, return null
*/
public static byte[] StartSiege(Credential credential, BigInteger serverId, BigInteger cityId, byte[] cardIds)
{
if (Global.VerifyUser(credential))
{
if (cityId >= Const.numCities)
{
return(NuTP.RespDataWithCode(ErrCate.City, ErrType.NotExist));
}
else
{ //City does exist
City city = RW.FindCity(serverId, cityId);
BigInteger status = RW.GetStatusCity(city);
if (status == StatusCity.Sieging)
{
return(NuTP.RespDataWithCode(ErrCate.City, ErrType.Duplicated));
}
else
{
User user = RW.FindUser(credential.email);
if (user.warID != Op.Void())
{ //User does not allow to participate into multiple wars at the same time
return(NuTP.RespDataWithCode(ErrCate.War, ErrType.Duplicated));
}
else
{
CarryBattleSC.Card[] cards = RW.Table2Cards(cardIds);
if (cards.Length != Const.numCardsSiege)
{ //Format of card array must be wrong
return(NuTP.RespDataWithCode(NuTP.SysDom, NuTP.Code.BadRequest));
}
for (int i = 0; i < Const.numCardsSiege; i++)
{
if (cards[i].ownerEmail != user.email)
{
return(NuTP.RespDataWithCode(ErrCate.Card, ErrType.NotExist));
}
}
Siege siege = RW.CreateSiege(serverId, city, user, cards, Blockchain.GetHeight());
return(NuTP.RespDataSucWithBody(RW.Seige2Bytes(siege)));
}
}
}
}
else
{
return(NuTP.RespDataWithCode(ErrCate.Account, ErrType.AuthFail));
}
}