public async Task <Avatar> Create(int userId, Avatar avatar)
{
using (var context = new TradePMREntities())
{
var user = await context.Users.FindAsync(userId);
if (user == null)
{
throw new ApplicationException($"User with id {userId} not found");
}
if (user.AvatarId != null)
{
throw new ApplicationException("User already has an avatar");
}
avatar.Users.Add(user);
var avatarCreated = context.Avatars.Add(avatar);
var created = await context.SaveChangesAsync();
if (created == 0)
{
return(null);
}
return(avatarCreated);
}
}
public async Task <User> Create(User user)
{
using (var context = new TradePMREntities())
{
var userCreated = context.Users.Add(user);
var created = await context.SaveChangesAsync();
if (created == 0)
{
return(null);
}
return(userCreated);
}
}
public async Task <User> Update(User user)
{
using (var context = new TradePMREntities())
{
var result = await context.Users.FindAsync(user.Id);
if (result == null)
{
return(null);
}
context.Entry(result).CurrentValues.SetValues(user);
context.Entry(result).State = EntityState.Modified;
var updated = await context.SaveChangesAsync();
if (updated == 0)
{
return(null);
}
return(user);
}
}
public async Task <Avatar> Update(int userId, Avatar avatar)
{
using (var context = new TradePMREntities())
{
var user = await context.Users.FindAsync(userId);
if (user == null)
{
throw new ApplicationException($"User with id {userId} not found");
}
if (user.AvatarId == null)
{
avatar.Users.Add(user);
context.Avatars.Add(avatar);
}
else
{
var result = await context.Avatars.FindAsync(user.AvatarId);
if (result == null)
{
return(null);
}
avatar.Id = result.Id;
context.Entry(result).CurrentValues.SetValues(avatar);
context.Entry(result).State = EntityState.Modified;
}
var updated = await context.SaveChangesAsync();
if (updated == 0)
{
return(null);
}
return(avatar);
}
}
public async Task <bool> Delete(User user)
{
using (var context = new TradePMREntities())
{
var result = await context.Users.FindAsync(user.Id);
if (result == null)
{
return(false);
}
if (result.Avatar != null)
{
context.Entry(result.Avatar).State = EntityState.Deleted;
}
context.Entry(result).State = EntityState.Deleted;
var deleted = await context.SaveChangesAsync();
if (deleted == 0)
{
return(false);
}
return(true);
}
}
public async Task <bool> Delete(int avatarId)
{
using (var context = new TradePMREntities())
{
var result = await context.Avatars.FindAsync(avatarId);
if (result == null)
{
return(false);
}
foreach (var user in result.Users)
{
context.Entry(user).Entity.AvatarId = null;
}
context.Entry(result).State = EntityState.Deleted;
var deleted = await context.SaveChangesAsync();
if (deleted == 0)
{
return(false);
}
return(true);
}
}