public async Task <ActionResult <List <UserDTO> > > GetCourseMembers(Guid id)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
var cachedMembers = await cache.GetCourseMembersAsync(id);
if (!(cachedMembers is null))
{
return(cachedMembers);
}
var course = await _context.Courses.FindAsync(id);
if (course is null)
{
return(NotFound());
}
var courseGroups = await _context.Courses
.Where(c => c.Id == id)
.Select(c => c.Groups.Select(g => g.Group))
.FirstOrDefaultAsync();
var members = new List <UserDTO>();
foreach (var group in courseGroups)
{
var users = await userManager.GetUsersForClaimAsync(new System.Security.Claims.Claim("study_group", group.Code));
members.AddRange(users.Select(user => courseMapper.MapUser(user)));
}
var nonGroupMembers = await _context.Courses
.Where(c => c.Id == id)
.Select(c => c.Students.Select(s => s.Student.User))
.FirstOrDefaultAsync();
members.AddRange(nonGroupMembers.Select(user => courseMapper.MapUser(user)));
members = members.Distinct(ProjectionEqualityComparer <UserDTO> .Create(u => u.Id))
.OrderBy(u => u.FirstName)
.ToList();
await cache.SetCourseMembersAsync(id, members);
return(members);
}
private async Task <IEnumerable <UserDTO> > GetUsersInRole(string role)
{
return((await userManager.GetUsersInRoleAsync(role))
.Select(user => courseMapper.MapUser(user)));
}