public async Task LogSettlement(long userId, DaoSettlement daoSettlement)
{
dynamic historyEntry = new ExpandoObject();
// Money settled
historyEntry.Money = daoSettlement.Amount;
// Direction of settlement:
historyEntry.From = daoSettlement.From;
historyEntry.To = daoSettlement.To;
// Log
await LogHistory(userId, daoSettlement.GroupId, new long[] { daoSettlement.From, daoSettlement.To }, DaoLogType.Type.CREATE, DaoLogSubType.Type.SETTLEMENT, historyEntry);
}
public async Task DebtSettlement(long userId, long debtorId, long lenderId, long groupId)
{
if (userId != debtorId && userId != lenderId)
{
throw new ResourceForbiddenException("user_not_in_transaction");
}
if (!(await GroupService.GetGroupOfUser(userId, groupId))
.Members.Any(x => (userId == lenderId && x.UserId == debtorId) ||
(userId == debtorId && x.UserId == lenderId)))
{
throw new ResourceForbiddenException("lender_or_debtor_not_member");
}
var optDeb = Context.OptimizedDebt
.FirstOrDefault(x => x.GroupId == groupId && x.UserOwesId == debtorId && x.UserOwedId == lenderId);
if (optDeb == null)
{
throw new ResourceGoneException("debt");
}
if (optDeb.OweAmount == 0)
{
throw new BusinessException("debt_already_payed");
}
DaoSettlement settlement = new DaoSettlement()
{
GroupId = groupId,
From = debtorId,
To = lenderId,
Amount = optDeb.OweAmount
};
await Context.Settlements.AddAsync(settlement);
await OptimizedService.OptimizeForSettling(groupId, lenderId, debtorId);
await HistoryService.LogSettlement(userId, settlement);
await Context.SaveChangesAsync();
}
public async Task DebtSettlement(long userId, long lenderId, long groupId)
{
var group = _context.Groups.SingleOrDefault(s => s.Id == groupId);
if (group == null)
{
throw new Exceptions.ResourceNotFoundException("group_not_found");
}
if (group.Members == null)
{
group.Members = new List <DaoUsersGroupsMap>();
}
var member = _context.UsersGroupsMap.FirstOrDefault(x => x.UserId == userId && x.GroupId == groupId);
if (member == null)
{
throw new Exceptions.ResourceForbiddenException("debter_not_group_member");
}
member = _context.UsersGroupsMap.FirstOrDefault(x => x.UserId == lenderId && x.GroupId == groupId);
if (member == null)
{
throw new Exceptions.ResourceForbiddenException("lender_not_group_member");
}
using (var transaction = _context.Database.BeginTransaction()) {
try {
// Log the previous spending here
var spendings = await _spendingService.GetSpendingsForGroup(groupId);
await _loggingService.LogForGroup(userId, groupId, spendings);
var optDeb = _context.OptimizedDebt.FirstOrDefault(x => x.GroupId == groupId && x.UserOwesId == userId && x.UserOwedId == lenderId);
if (optDeb == null)
{
throw new Exceptions.ResourceGoneException("debt_gone");
}
if (optDeb.OweAmount == 0)
{
throw new Exceptions.BusinessException("debt_already_payed");
}
DaoSettlement settlement = new DaoSettlement()
{
GroupId = groupId,
From = userId,
To = lenderId,
Amount = optDeb.OweAmount
};
await _context.Settlements.AddAsync(settlement);
if (await _context.SaveChangesAsync() != 1)
{
throw new Exceptions.DatabaseException("debt_not_settled");
}
transaction.Commit();
} catch {
transaction.Rollback();
throw;
}
}
}