public async Task <DbVocabularyExercise> CreateVocabularyExerciseAsync(DbVocabularyExercise vocabularyExercise)
{
if (vocabularyExercise == null || vocabularyExercise.Id != 0)
{
return(null);
}
var test = await _context.Tests
.Where(t => t.Id == vocabularyExercise.TestId)
.SingleOrDefaultAsync();
test.NumberOfQuestions++;
_context.VocabularyExercises.Add(vocabularyExercise);
await _context.SaveChangesAsync();
return(vocabularyExercise);
}
public async Task <DbVocabularyExercise> EditVocabularyExerciseAsync(DbVocabularyExercise vocabularyExercise)
{
var oldExercise = await _context.VocabularyExercises
.Where(e => e.Id == vocabularyExercise.Id)
.SingleOrDefaultAsync();
if (oldExercise == null)
{
return(null);
}
if (oldExercise.Sentence != vocabularyExercise.Sentence)
{
oldExercise.Sentence = vocabularyExercise.Sentence;
}
if (oldExercise.TranslatedSentence != vocabularyExercise.TranslatedSentence)
{
oldExercise.TranslatedSentence = vocabularyExercise.TranslatedSentence;
}
if (oldExercise.CorrectAnswer != vocabularyExercise.CorrectAnswer)
{
oldExercise.CorrectAnswer = vocabularyExercise.CorrectAnswer;
}
if (oldExercise.TranslatedCorrectAnswer != vocabularyExercise.TranslatedCorrectAnswer)
{
oldExercise.TranslatedCorrectAnswer = vocabularyExercise.TranslatedCorrectAnswer;
}
if (oldExercise.Picture != vocabularyExercise.Picture)
{
oldExercise.Picture = vocabularyExercise.Picture;
}
if (oldExercise.WrongAnswer1 != vocabularyExercise.WrongAnswer1)
{
oldExercise.WrongAnswer1 = vocabularyExercise.WrongAnswer1;
}
if (oldExercise.WrongAnswer2 != vocabularyExercise.WrongAnswer2)
{
oldExercise.WrongAnswer2 = vocabularyExercise.WrongAnswer2;
}
if (oldExercise.WrongAnswer3 != vocabularyExercise.WrongAnswer3)
{
oldExercise.WrongAnswer3 = vocabularyExercise.WrongAnswer3;
}
if (oldExercise.TranslatedWrongAnswer1 != vocabularyExercise.TranslatedWrongAnswer1)
{
oldExercise.TranslatedWrongAnswer1 = vocabularyExercise.TranslatedWrongAnswer1;
}
if (oldExercise.TranslatedWrongAnswer2 != vocabularyExercise.TranslatedWrongAnswer2)
{
oldExercise.TranslatedWrongAnswer2 = vocabularyExercise.TranslatedWrongAnswer2;
}
if (oldExercise.TranslatedWrongAnswer3 != vocabularyExercise.TranslatedWrongAnswer3)
{
oldExercise.TranslatedWrongAnswer3 = vocabularyExercise.TranslatedWrongAnswer3;
}
try
{
_context.VocabularyExercises.Update(oldExercise);
await _context.SaveChangesAsync();
}
catch (Exception)
{
return(null);
}
return(vocabularyExercise);
}
