/// <summary>
/// Add new movie rating
/// </summary>
/// <param name="title">Movie's title</param>
/// <param name="score">Movie's score</param>
/// <returns>Adding score result</returns>
public ValidationResult RateMovie(string title, int score)
{
if (string.IsNullOrEmpty(title))
{
return(new ValidationResult(false, "Movie's title cannot be empty"));
}
if (score <= 0)
{
return(new ValidationResult(false, "Score cannot be lower than 1"));
}
if (score > 10)
{
return(new ValidationResult(false, "Score cannot be greater than 10"));
}
// Note: Caching could be introduced here, not to call external service every time
var movie = _movieExternalService.GetMovie(title);
if (movie == null)
{
return(new ValidationResult(false, $"Movie {title} does not exist"));
}
_movieRepository.AddNewRating(title, score);
return(new ValidationResult(true));
}