public void Insert(MessagesBindingModel model)
{
using (var context = new AdBoardDatabase())
{
context.Messages.Add(CreateModel(model, new Messages()));
context.SaveChanges();
}
}
public void CreateOrUpdate(MessagesBindingModel model)
{
if (model.Id.HasValue)
{
_messageStorage.Update(model);
}
else
{
_messageStorage.Insert(model);
}
}
public void Delete(MessagesBindingModel model)
{
var element = _messageStorage.GetElement(new MessagesBindingModel
{
Id = model.Id
});
if (element == null)
{
throw new Exception("Сообщение не найден");
}
_messageStorage.Delete(model);
}
public void Update(MessagesBindingModel model)
{
using (var context = new AdBoardDatabase())
{
var element = context.Messages.FirstOrDefault(rec => rec.Id ==
model.Id);
if (element == null)
{
throw new Exception("Сообщение не найдено");
}
CreateModel(model, element);
context.SaveChanges();
}
}
public List <MessagesViewModel> Read(MessagesBindingModel model)
{
if (model == null)
{
return(_messageStorage.GetFullList());
}
if (model.Id.HasValue)
{
return(new List <MessagesViewModel> {
_messageStorage.GetElement(model)
});
}
return(_messageStorage.GetFilteredList(model));
}
public void Delete(MessagesBindingModel model)
{
using (var context = new AdBoardDatabase())
{
Messages element = context.Messages.FirstOrDefault(rec => rec.Id ==
model.Id);
if (element != null)
{
context.Messages.Remove(element);
context.SaveChanges();
}
else
{
throw new Exception("Сообщение не найдено");
}
}
}
public MessagesViewModel GetElement(MessagesBindingModel model)
{
if (model == null)
{
return(null);
}
using (var context = new AdBoardDatabase())
{
var message = context.Messages
.FirstOrDefault(rec => rec.Id == model.Id);
return(message != null ?
new MessagesViewModel
{
Id = message.Id,
Username = context.Messages.Include(x => x.User).FirstOrDefault(x => x.UserId == x.UserId).User.Username,
UserId = message.UserId,
Text = message.Text,
Date = message.Date
} :
null);
}
}
public List <MessagesViewModel> GetFilteredList(MessagesBindingModel model)
{
if (model == null)
{
return(null);
}
using (var context = new AdBoardDatabase())
{
return(context.Messages
.Include(rec => rec.User)
.Where(rec => rec.UserId == model.UserId)
.Select(rec => new MessagesViewModel
{
Id = rec.Id,
Username = rec.User.Username,
UserId = rec.UserId,
Text = rec.Text,
Date = rec.Date
})
.ToList());
}
}
private Messages CreateModel(MessagesBindingModel model, Messages message)
{
message.Text = model.Text;
message.Date = model.Date;
return(message);
}
