/// <summary>
/// Shows all courses by search request and search variant from the database.
/// </summary>
/// <param name="searchRequest"></param>
/// <param name="variant"></param>
/// <returns></returns>
public async Task <IEnumerable <CourseInfo> > GetSearchCourses(string searchRequest, SearchVariant variant)
{
IEnumerable <CourseInfo> coursesInfo = null;
if (variant == SearchVariant.ByName)
{
try
{
var allCourses = await _courseRepository.GetAllAsync();
var courses = allCourses.Where(c => c.Name.Contains(searchRequest));
coursesInfo = _mapper.Map <IEnumerable <CourseDb>, IEnumerable <CourseInfo> >(courses);
}
catch (KeyNotFoundException)
{
coursesInfo = null;
}
}
else if (variant == SearchVariant.ByTag)
{
try
{
var tag = _tegRepository.GetAll().FirstOrDefault(c => c.Content.Equals(searchRequest));
if (tag == null)
{
tag.TagId = Guid.NewGuid().ToString();
tag.Content = searchRequest;
}
var courses = await _tegRepository.GetCoursesAsync(tag);
coursesInfo = _mapper.Map <IEnumerable <CourseDb>, IEnumerable <CourseInfo> >(courses);
}
catch (KeyNotFoundException)
{
coursesInfo = null;
}
}
else if (variant == SearchVariant.ByAuthor)
{
try
{
var author = _authorRepository.GetAllAsync().GetAwaiter().GetResult().FirstOrDefault(c => c.Lastname.Equals(searchRequest));
var courses = await _courseRepository.GetByAuthorAsync(author);
coursesInfo = _mapper.Map <IEnumerable <CourseDb>, IEnumerable <CourseInfo> >(courses);
}
catch (KeyNotFoundException)
{
coursesInfo = null;
}
}
return(coursesInfo);
}
protected string SearchVariantValue(SearchVariant searchVariant)
{
return((searchVariant == SearchVariant.None) ? "" : JsonConvert.SerializeObject(searchVariant).Trim('\"'));
}