/// <summary>
/// Uploads a number of tips used by a candidate.
/// </summary>
/// <param name="taskId">An id of a task.</param>
/// <param name="usedTipsNumber">A number of used tips.</param>
/// <param name="userId">An id of a candidate.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
public Task UploadTipsNumber(int taskId, int usedTipsNumber, Guid userId)
{
string cadidateCode = string.Empty;
CandidateTaskResult result = CreateCandidateTaskResult(cadidateCode, taskId, userId, usedTipsNumber);
result.Score = 0;
return(UpdateCandidateTaskResultAsync(result));
}
private static void UpdateResult(CandidateTaskResult previousResult, CandidateTaskResult currentTaskResult)
{
previousResult.Code = currentTaskResult.Code;
previousResult.CandidateExerciseId = currentTaskResult.CandidateExerciseId;
previousResult.CreatorId = currentTaskResult.CreatorId;
previousResult.ModifierId = currentTaskResult.ModifierId;
previousResult.UsedTipsNumber = currentTaskResult.UsedTipsNumber;
previousResult.Score = currentTaskResult.Score;
previousResult.IsCompleted = currentTaskResult.IsCompleted;
previousResult.EndDate = currentTaskResult.EndDate;
}
/// <summary>
/// Create task result.
/// </summary>
/// <param name="taskId">An id of a task.</param>
/// <param name="startDate">Task start date.</param>
/// <param name="userId">An id of a candidate.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
public Task CreateCandidateTaskResultAsync(int taskId, DateTime startDate, Guid userId)
{
CandidateTaskResult currentTaskResult = CreateCandidateTaskResult(null, taskId, userId, 0, startDate);
CandidateTaskResult previousResult = _context.CandidateTaskResults.FirstOrDefault(result => result.ModifierId == currentTaskResult.ModifierId && result.CandidateExerciseId == currentTaskResult.CandidateExerciseId);
if (previousResult != null)
{
throw new TaskResultAlreadyExistsException();
}
return(SaveCandidateTaskResultAsync(currentTaskResult));
}
/// <summary>
/// Updates task result.
/// </summary>
/// <param name="currentTaskResult">A candidates' current result.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
public Task UpdateCandidateTaskResultAsync(CandidateTaskResult currentTaskResult)
{
if (currentTaskResult == null)
{
throw new ArgumentNullException(nameof(currentTaskResult));
}
CandidateTaskResult previousResult = _context.CandidateTaskResults.FirstOrDefault(result => result.ModifierId == currentTaskResult.ModifierId && result.CandidateExerciseId == currentTaskResult.CandidateExerciseId);
if (previousResult == null)
{
return(SaveCandidateTaskResultAsync(currentTaskResult));
}
UpdateResult(previousResult, currentTaskResult);
return(_context.SaveChangesAsync());
}
/// <summary>
/// Creates an instance of <see cref="CandidateTaskResult"/>
/// </summary>
/// <param name="candidateCode">A code of a candidate.</param>
/// <param name="taskId">An id of a task made by a candidate.</param>
/// <param name="userId">An id of a candidate.</param>
/// <param name="usedTipsNumber">A number of tips used by a candidate.</param>
/// <param name="startDate">Task start date.</param>
/// <param name="endDate">Task end date.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
private static CandidateTaskResult CreateCandidateTaskResult(
string candidateCode, int taskId, Guid userId, int usedTipsNumber, DateTime?startDate = null, DateTime?endDate = null)
{
var candidatesResult = new CandidateTaskResult
{
Code = candidateCode,
CandidateExerciseId = taskId,
CreatorId = userId,
ModifierId = userId,
UsedTipsNumber = usedTipsNumber,
Score = 0,
IsCompleted = false,
StartDate = startDate,
EndDate = endDate
};
return(candidatesResult);
}
private Task SaveCandidateTaskResultAsync(CandidateTaskResult candidatesResult)
{
_context.CandidateTaskResults.Add(candidatesResult);
return(_context.SaveChangesAsync());
}