public async Task Execute(PangulDbContext db, UpdateQuestion command)
{
command.Validate();
// Get existing question
var question = await _getQuestion.Execute(db, new GetQuestion()
{
UserContext = command.UserContext,
LightWeightOnly = false,
QuestionId = command.QuestionId,
RowVersion = command.RowVersion,
});
if (question == null)
{
throw new PangulCommandFailedException(CommandFailureType.MissingData, $"No such question ({command.QuestionId}, {command.RowVersion})");
}
// Verify user has permission
await _internalUserPermissionService.RequireWriteAccessFor(question, command.UserContext);
// Get tag lists
var tags = command.Tags ?? new string[0];
var newTags = tags.Where(i => question.Tags.All(j => j.Tag != i) && !string.IsNullOrWhiteSpace(i));
var dropTags = question.Tags.Where(i => tags.All(j => j != i.Tag));
// Update properties
command.ApplyTo(question);
// Drop old tags
foreach (var tag in dropTags)
{
db.QuestionTag.Remove(tag);
}
// Create tags for those not present
await db.QuestionTag.AddRangeAsync(newTags.Select(t => new QuestionTag
{
Tag = t,
QuestionId = question.QuestionId
}));
}
public async Task PurgeExistingAnswer(PangulDbContext db, UserContext user, string answerId, DataBackupConfiguration backupConfiguration)
{
var answer = await _answerService.GetAnswer(db, user, answerId);
if (answer == null)
{
throw new PangulCommandFailedException(CommandFailureType.MissingData, $"No such answer ({answerId})");
}
await _internalUserPermissionService.RequireWriteAccessFor(answer, user);
_backupService.Backup(answer, backupConfiguration);
await _purgeAnswer.Execute(db, new PurgeAnswerData()
{
Answer = answer,
UserContext = user
});
}
public async Task Execute(PangulDbContext db, UpdateAnswer command)
{
command.Validate();
// Fetch the answer
var answer = await _getAnswer.Execute(db, new GetAnswer()
{
UserContext = command.UserContext,
AnswerId = command.AnswerId,
RowVersion = command.RowVersion
});
if (answer == null)
{
throw new PangulCommandFailedException(CommandFailureType.MissingData, $"No such answer ({command.AnswerId}, {command.RowVersion})");
}
// Verify user has permission
await _permissionService.RequireWriteAccessFor(answer, command.UserContext);
// Update the answer
answer.Body = command.NewBody;
}