343 lines
11 KiB
Markdown
343 lines
11 KiB
Markdown
# Session 9 - Ticket Reservation
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As this order is comming to an end, we are completing the functionality of application with the vital feature of reserving tickets
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## Miscellaneous / Fixes
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- [ ] Fix GUID generation and async handling in ticket creation. (Use `Guid.NewGuid()` instead of `new Guid()`)
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```csharp
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SerialNumber = Guid.NewGuid().ToString("N")
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```
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- [ ] Make `SerialNumber`, `TicketOrderId`, `BaseAmount` publicly settable in DTOs if they're private.
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- [ ] Check `Transaction` and make sure `SerialNumber` is not a required property.
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## Branching
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- [ ] Create the feature/ticket-reservation branch based on develop
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# Ticket Ordering System
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## 🧱 Domain and Infrastructure Setup
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- [ ] Check out new ERD: [Here](https://github.com/TheOrderOfPhoenix/ASP.NET/blob/main/ProjectOrientedSessions/docs/AlibabaERD-Version02.pdf)
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- [ ] Add migrations for the above database changes.
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## 🧑💼 Service Layer
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- [ ] Create DTOs `CreateTravellerTicketDto` and `CreateTicketOrderDto`:
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```csharp
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public class CreateTravellerTicketDto
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{
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public long Id { get; set; }
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public long CreatorId { get; set; }
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[Required(ErrorMessage = "First name is required")]
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public required string FirstName { get; set; }
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[Required(ErrorMessage = "Last name is required")]
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public required string LastName { get; set; }
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[Required(ErrorMessage = "Id number is required")]
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[RegularExpression(@"^\d{10}$", ErrorMessage = "National ID number must be exactly 10 digits")]
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public required string IdNumber { get; set; }
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[Required(ErrorMessage = "Gender should be identified")]
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public required short GenderId { get; set; }
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[Required(ErrorMessage = "Phone number is required")]
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[Phone(ErrorMessage = "Invalid phone number format")]
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public required string PhoneNumber { get; set; }
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[Required(ErrorMessage = "Birth date is required")]
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public DateTime BirthDate { get; set; }
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public long? SeatId { get; set; }
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public bool IsVIP { get; set; }
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public string? Description { get; set; }
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}
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```
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```csharp
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public class CreateTicketOrderDto
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{
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public long TransportationId { get; set; }
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public List<CreateTravellerTicketDto> MyProperty { get; set; }
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}
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```
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Note: If you have the **Coupon** feature in your project, then add a `CouponCode` property in `CreateTicketOrderDto`.
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- [ ] Modify SeatRepository to add method `GetSeatsByVehicleIdAsync`
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```csharp
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public Task<List<Seat>> GetSeatsByVehicleIdAsync(long vehicleId)
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{
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var seats = DbSet
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.Include(s => s.Vehicle)
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.Include(s => s.Tickets).ThenInclude(t => t.Traveler)
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.Where(s => s.VehicleId == vehicleId).ToListAsync();
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return seats;
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}
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```
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- [ ] Add Enum for **TicketStatus**, **VehicleType** and **TransactionType**
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```csharp
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public enum TicketStatusEnum
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{
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Reserved = 1,
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Paid = 2,
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CancelledByUser = 3,
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CancelledBySystem = 4,
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Used = 5,
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Expired = 6
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}
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```
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```csharp
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public enum VehicleTypeEnum
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{
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Airplane = 1,
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Train = 2,
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Bus = 3
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}
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```
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```csharp
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public enum TransactionTypeEnum
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{
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Deposit = 1,
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Withdraw = 2
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}
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```
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- [ ] Add the lock-service to lock the transportation through reservation, then register it:
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```csharp
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public class TransportationLockService : ITransportationLockService
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{
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private readonly ConcurrentDictionary<long, SemaphoreSlim> _locks = new();
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public async Task<IDisposable> AcquireLockAsync(long transportationId)
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{
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var semaphore = _locks.GetOrAdd(transportationId, new SemaphoreSlim(1, 1));
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await semaphore.WaitAsync();
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return new Releaser(() => semaphore.Release());
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}
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private class Releaser : IDisposable
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{
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private readonly Action _release;
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public Releaser(Action release)
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{
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_release = release;
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}
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public void Dispose()
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{
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_release();
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}
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}
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}
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```
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- [ ] Add method `CreateAsync` in `TransportationService`
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```csharp
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public async Task<Result<long>> CreateAsync(long accountId, TransactionDto dto)
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{
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Transaction transaction = new();
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_mapper.Map(dto, transaction);
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transaction.AccountId = accountId;
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await _transactionRepository.InsertAsync(transaction);
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await _unitOfWork.CompleteAsync();
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return Result<long>.Success(transaction.Id);
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}
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```
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- [ ] Add method `PayForTicketOrderAsync` in `AccountService`
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```csharp
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public async Task<Result<long>> PayForTicketOrderAsync(long accountId, long ticketOrderId, decimal baseAmount, decimal finalAmount)
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{
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var account = await _accountRepository.GetByIdAsync(accountId);
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if (account == null)
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{
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return Result<long>.Error(0, "Account not found");
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}
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if (account.Balance < finalAmount)
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{
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return Result<long>.Error(0, "Not enough money");
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}
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account.Withdraw(finalAmount);
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_accountRepository.Update(account);
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await _unitOfWork.CompleteAsync();
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TransactionDto dto = new()
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{
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CreatedAt = DateTime.UtcNow,
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Description = "Payment for ticket order #" + ticketOrderId + " at " + DateTime.UtcNow,
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BaseAmount = baseAmount,
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FinalAmount = finalAmount,
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SerialNumber = Guid.NewGuid().ToString("N"),
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TicketOrderId = ticketOrderId,
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TransactionTypeId = (int)TransactionTypeEnum.Withdraw,
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TransactionType = TransactionTypeEnum.Withdraw.ToString()
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};
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return await _transactionService.CreateAsync(accountId, dto);
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}
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```
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- [ ] Create `ITicketOrderService`, `TicketOrderService` and implement `CreateTicketOrderAsync`
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```csharp
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public async Task<Result<long>> CreateTicketOrderAsync(long accountId, CreateTicketOrderDto dto)
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{
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// get the account
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var account = await _accountRepository.GetByIdAsync(accountId);
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if (account == null)
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{
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return Result<long>.Error(0, "Account not found");
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}
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// get the transportation
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var transportation = await _transportationRepository.GetByIdAsync(dto.TransportationId);
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if (transportation == null)
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{
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return Result<long>.Error(0, "Transportation not found");
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}
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// lock the transportation through reservation
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using (await _transportationLockService.AcquireLockAsync(dto.TransportationId))
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{
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var baseAmount = transportation.BasePrice * dto.Travellers.Count;
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if (account.Balance < baseAmount)
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{
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return Result<long>.Error(0, "Not enough money");
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}
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// check validity of transportation
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var checkSeats = ValidateTransportationAndSeats(transportation, dto.Travellers);
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if (!string.IsNullOrEmpty(checkSeats))
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{
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return Result<long>.Error(0, checkSeats);
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}
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var finalAmount = baseAmount;
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await AssignSeatsIfDynamic(transportation.VehicleId, dto.Travellers);
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await UpsertTravellers(accountId, dto.Travellers);
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// add the ticket order by the info we have
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TicketOrder ticketOrder = new()
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{
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BuyerId = accountId,
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CreatedAt = DateTime.UtcNow,
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Description = "",
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SerialNumber = Guid.NewGuid().ToString("N"),
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TransportationId = dto.TransportationId
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};
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await _ticketOrderRepository.InsertAsync(ticketOrder);
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foreach (var traveller in dto.Travellers)
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{
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if (!traveller.SeatId.HasValue)
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{
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return Result<long>.Error(0, "Seat ID is required for each traveller");
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}
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Ticket ticket = new()
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{
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CreatedAt = DateTime.UtcNow,
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Description = traveller.Description,
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SeatId = traveller.SeatId.Value,
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SerialNumber = Guid.NewGuid().ToString("N"),
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TicketOrder = ticketOrder,
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TicketStatusId = 1,
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TravelerId = traveller.Id,
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};
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await _ticketRepository.InsertAsync(ticket);
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}
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await _unitOfWork.CompleteAsync();
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await _accountService.PayForTicketOrderAsync(account.Id, ticketOrder.Id,
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baseAmount, finalAmount);
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return Result<long>.Success(ticketOrder.Id);
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}
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}
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```
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- [ ] Register `TicketOrderService` in DI container.
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## 🎯 Controller Layer
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- [ ] Create `TicketOrderController` with the following endpoints:
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- [ ] `POST /CreateTicketOrder`
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- [ ] `GET /DownloadPdf`
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## 🔁 DTOs & Mappings
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- [ ] Add `CreateTicketOrderDto`, `CreateTravelerTicketDto`.
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- [ ] Add `TicketOrderSummaryDto`, `TravelerTicketDto`.
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- [ ] Add mappings in `MappingProfile`.
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## 🗃️ Repository Layer
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- [ ] Create `ITicketOrderRepository`, `TicketOrderRepository`.
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- [ ] Implement:
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- [ ] `FindAndLoadAllDetails`
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- [ ] `GetAllByBuyerId`
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---
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# Transportation and Seat Selection
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- [ ] Add `TransportationSeatDto`.
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- [ ] Add method `GetSeatsByVehicleId` in `ISeatRepository` and implement it.
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- [ ] Add mapping from `Seat` to `TransportationSeatDto`.
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- [ ] Add `GetTransportationSeatsAsync` in `ITransportationService` and implement.
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- [ ] Add `GetTransportationSeats` endpoint in `TransportationController`.
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- [ ] Fix vehicle and seat-related mapping issues (e.g., missing `VehicleTypeId`, logic errors).
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- [ ] Ensure `RemainingCapacity` is treated as calculated (ignored in EF, removed from schema).
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---
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# Coupon System
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## 🏗️ Domain & Infrastructure
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- [ ] Add `Coupon` entity with `IsExpired`, `CouponCode` (unique).
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- [ ] Add `ICouponRepository`, `CouponRepository`.
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- [ ] Add `DiscountDto`, `CouponValidationRequestDto`.
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- [ ] Add migrations for new `Coupon` table.
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### 🧑💼 Service & Logic
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- [ ] Create `ICouponService`, implement validation logic.
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- [ ] Add coupon validation in `TicketOrderService`.
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### 🎯 Controller
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- [ ] Add `ValidateCoupon` endpoint in `CouponController`.
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---
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# Payment & Transactions
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- [ ] Add `CouponId` to `PayForTicketOrderAsync` in `IAccountService` & implementation.
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- [ ] Add `CouponId` to `TransactionDto` (adjusted to `CouponCode` later).
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- [ ] Add `TopUpAccount` logic (DTO, Controller, Service).
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- [ ] Add `Transaction` relationship to `TicketOrder` as one-to-one.
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- [ ] Add logic for creating transactions with tickets.
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- [ ] Add endpoint `GetMyTransactions` and DTOs (`TransactionDto`).
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---
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## ✅ Ticket Review & Confirmation
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- [ ] Add `TicketOrderSummaryDto`, map details: from/to city, company, vehicle, time.
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- [ ] Implement `GetTravelOrderDetails` endpoint to fetch ticket summary.
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- [ ] Display number of travelers, per-seat price, and total cost.
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- [ ] Include coupon entry and balance payment option.
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- [ ] Use ticket + person data (via `GetTicketOrderTravelersDetails`).
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---
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## ✅ PDF Generation
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- [ ] Install `QuestPDF` in infrastructure.
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- [ ] Create `IPdfGenerator`, implement with QuestPDF.
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- [ ] Register `IPdfGenerator` service.
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- [ ] Create `PdfGenerator` logic to render ticket PDFs.
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- [ ] Add PDF download endpoint (`DownloadPdf`) in `TicketOrderController`.
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---
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# Merge
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- [ ] Create a PR and merge the current branch with develop
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