public async Task <int> Handle(CreateRideshareCommand request, CancellationToken cancellationToken)
{
// TODO: Split into multiple smaller methods
// Date validation logic
if (request.StartDate.Value >= request.EndDate)
{
throw new InvalidDateException(InvalidDateMessageEnum.StartAfterEnd);
}
// Check if selected car exists
var car = await _context.Cars
.FindAsync(request.Car.Id);
if (car == null)
{
throw new NotFoundException(nameof(Car), request.Car.Id);
}
// Check if specified employees exist
foreach (var e in request.Employees)
{
var employee = await _context.Employees
.FindAsync(e.Id);
if (employee == null)
{
throw new NotFoundException(nameof(Employee), e.Id);
}
}
// Check if car is available during selected time period
var rideshares = await _context.Rideshares
.Include(r => r.Car)
.Where(r => r.Car.Id == request.Car.Id)
.Where(r => r.EndDate > request.StartDate)
.ToListAsync();
foreach (var r in rideshares)
{
if (request.StartDate < r.StartDate)
{
if (request.EndDate > r.StartDate)
{
throw new InvalidDateException(InvalidDateMessageEnum.TravelPeriodTaken);
}
}
else
{
if (request.StartDate < r.EndDate)
{
throw new InvalidDateException(InvalidDateMessageEnum.TravelPeriodTaken);
}
}
}
// Check if employees can fit into select car
var employees = await _context.Employees
.Select(ce => new { ce.Id, ce.IsDriver })
.Where(ce => request.Employees.Select(re => re.Id).Contains(ce.Id))
.ToListAsync();
if (employees.Count > car.NumberOfSeats)
{
throw new TooManyEmployeesException(request.Car.Id);
}
// Check if at least one employee is a driver
if (!employees.Any(e => e.IsDriver))
{
throw new NoDriverException();
}
// Create new Rideshare entity
var entity = new Rideshare
{
StartLocation = request.StartLocation,
EndLocation = request.EndLocation,
StartDate = request.StartDate,
EndDate = request.EndDate,
Car = car
};
foreach (var e in request.Employees)
{
var er = new EmployeeRideshare
{
Employee = await _context.Employees.FindAsync(e.Id),
EmployeeId = e.Id,
Rideshare = entity,
RideshareId = entity.Id
};
entity.EmployeeRideshares.Add(er);
}
_context.Rideshares.Add(entity);
await _context.SaveChangesAsync(cancellationToken);
return(entity.Id);
}
public async Task <Unit> Handle(UpdateRideshareCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Rideshares
.Include(r => r.Car)
.FirstOrDefaultAsync(r => r.Id == request.Id);
if (entity == null)
{
throw new NotFoundException(nameof(Rideshare), request.Id);
}
// TODO: Split into multiple smaller methods
// TODO: optimize this to skip checking unchanged fields
// Date validation logic
if (request.StartDate.Value >= request.EndDate)
{
throw new InvalidDateException(InvalidDateMessageEnum.StartAfterEnd);
}
// Check if selected car exists
var car = await _context.Cars
.FindAsync(request.Car.Id);
if (car == null)
{
throw new NotFoundException(nameof(Car), request.Car.Id);
}
// Check if specified employees exist
foreach (var e in request.Employees)
{
var employee = await _context.Employees
.FindAsync(e.Id);
if (employee == null)
{
throw new NotFoundException(nameof(Employee), e.Id);
}
}
// Check if car is available during selected time period
var rideshares = await _context.Rideshares
.Include(r => r.Car)
.Where(r => r.Car.Id == request.Car.Id)
.Where(r => r.EndDate > request.StartDate)
.Where(r => r.Id != request.Id) // since we want to update this rideshare we skip checking on it
.ToListAsync();
foreach (var r in rideshares)
{
if (request.StartDate < r.StartDate)
{
if (request.EndDate > r.StartDate)
{
throw new InvalidDateException(InvalidDateMessageEnum.TravelPeriodTaken);
}
}
else
{
if (request.StartDate < r.EndDate)
{
throw new InvalidDateException(InvalidDateMessageEnum.TravelPeriodTaken);
}
}
}
// Check if employees can fit into select car
var employees = await _context.Employees
.Select(ce => new { ce.Id, ce.IsDriver })
.Where(ce => request.Employees.Select(re => re.Id).Contains(ce.Id))
.ToListAsync();
if (employees.Count > car.NumberOfSeats)
{
throw new TooManyEmployeesException(request.Car.Id);
}
// Check if at least one employee is a driver
if (!employees.Any(e => e.IsDriver))
{
throw new NoDriverException();
}
entity.StartLocation = request.StartLocation;
entity.EndLocation = request.EndLocation;
entity.StartDate = request.StartDate;
entity.EndDate = request.EndDate;
entity.Car = car;
// Remove old employee-rideshare entities and remake them with new IDs
var erForRemoval = await _context.EmployeeRideshares
.Where(er => er.RideshareId == request.Id)
.ToListAsync();
_context.EmployeeRideshares.RemoveRange(erForRemoval);
entity.EmployeeRideshares.Clear();
foreach (var e in request.Employees)
{
var er = new EmployeeRideshare
{
Employee = await _context.Employees.FindAsync(e.Id),
EmployeeId = e.Id,
Rideshare = entity,
RideshareId = entity.Id
};
entity.EmployeeRideshares.Add(er);
}
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
