public CircleGetCandidatesOutputData Handle(CircleGetCandidatesInputData inputData)
{
var circle = context.Circles
.Include(x => x.CircleMembers)
.ThenInclude(cm => cm.Circle)
.FirstOrDefault(c => c.Id == inputData.CircleId);
if (circle == null)
{
throw new CircleNotFoundException(new CircleId(inputData.CircleId));
}
var members = circle.CircleMembers
.Select(m => m.UserId);
if (circle.OwnerId != null)
{
members = members.Concat(new List<string> { circle.OwnerId });
}
var exceptUsers = members.ToHashSet();
var page = inputData.Page;
var size = inputData.Size;
var chunk = context.Users
.Where(u => !exceptUsers.Contains(u.Id))
.Skip((page - 1) * size)
.Take(size)
.ToList();
var candidates = chunk.Select(x => new UserData(x.Id, x.Name)).ToList();
return new CircleGetCandidatesOutputData(candidates);
}
public CircleGetCandidatesResponseModel GetCandidates(string id, [FromQuery] int page, [FromQuery] int size)
{
var command = new CircleGetCandidatesInputData(id, page, size);
var result = bus.Handle(command);
var users = result.Users.Select(x => new UserResponseModel(x)).ToList();
return(new CircleGetCandidatesResponseModel(users));
}
public CircleGetCandidatesOutputData Handle(CircleGetCandidatesInputData inputData)
{
var circleId = new CircleId(inputData.CircleId);
var circle = circleRepository.Find(circleId);
var members = circle.Members.Concat(new[] { circle.Owner }).ToHashSet();
var candidates = userRepository.FindAll()
.Where(x => !members.Contains(x.Id))
.Skip((inputData.Page - 1) * inputData.Size)
.Take(inputData.Size);
var candidatesData = candidates.Select(toUserData).ToList();
return(new CircleGetCandidatesOutputData(candidatesData));
}
public CircleGetCandidatesOutputData Handle(CircleGetCandidatesInputData inputData)
{
var circleId = new CircleId(inputData.CircleId);
var circle = circleRepository.Find(circleId);
if (circle == null)
{
throw new CircleNotFoundException(circleId);
}
using (var sqlCommand = provider.Connection.CreateCommand())
{
var parameterNames = circle.Members.Select((_, i) => "@member" + i).ToList();
var selectQuery = new StringBuilder(@" SELECT * FROM users");
var appendWhere = false;
if (circle.ExistsOwner())
{
selectQuery.Append(" WHERE id <> @ownerId");
appendWhere = true;
}
if (parameterNames.Any())
{
var inParameters = string.Join(",", parameterNames);
var inPhrase = new StringBuilder();
if (appendWhere)
{
inPhrase.Append(" AND");
}
inPhrase.Append($" id NOT IN ({inParameters})");
if (!appendWhere)
{
selectQuery.Append(" WHERE");
appendWhere = true;
}
selectQuery.Append(inPhrase);
}
selectQuery.Append(@"
ORDER BY id
OFFSET @skip ROWS
FETCH NEXT @size ROWS ONLY
");
sqlCommand.CommandText = selectQuery.ToString();
if (circle.ExistsOwner())
{
sqlCommand.Parameters.Add(new SqlParameter("@ownerId", circle.Owner.Value));
}
foreach (var tpl in circle.Members.Zip(parameterNames, (memberId, parameter) => new { memberId, parameter }))
{
sqlCommand.Parameters.Add(new SqlParameter(tpl.parameter, tpl.memberId.Value));
}
var page = inputData.Page;
var size = inputData.Size;
sqlCommand.Parameters.Add(new SqlParameter("@skip", (page - 1) * size));
sqlCommand.Parameters.Add(new SqlParameter("@size", size));
using (var reader = sqlCommand.ExecuteReader())
{
var members = new List <UserData>();
while (reader.Read())
{
var id = (string)reader["id"];
var name = (string)reader["name"];
var data = new UserData(id, name);
members.Add(data);
}
return(new CircleGetCandidatesOutputData(members));
}
}
}