public List <MessageViewDTO> GetHashtagFeed(string hashtag, DiscussionSortFields field, CommonEnums.SortDirections dir, out long?hashtagId, out string error)
{
error = string.Empty;
hashtagId = null;
try
{
hashtagId = FindHashtagByName(hashtag);
if (hashtagId == null)
{
error = "Hashtag " + hashtag + " not found";
return(new List <MessageViewDTO>());
}
var messages = DiscussionClassRoomRepository.GetHashtagMessages((long)hashtagId).Select(s => s.Entity2MessageViewDto()).ToList();
return(BuildMessageFeedTree(messages.ToArray(), field, dir));
}
catch (Exception ex)
{
error = Utils.FormatError(ex);
Logger.Error("get hashtag " + hashtag + " feed", null, ex, CommonEnums.LoggerObjectTypes.Discussion);
return(new List <MessageViewDTO>());
}
}
public List <MessageViewDTO> GetRoomMessages(int roomId, DiscussionSortFields field, CommonEnums.SortDirections dir)
{
try
{
var messages = DiscussionClassRoomRepository.GetRoomMessages(roomId).Select(s => s.Entity2MessageViewDto()).ToList();
return(BuildMessageFeedTree(messages.ToArray(), field, dir));
}
catch (Exception ex)
{
Logger.Error("get room feed", roomId, ex, CommonEnums.LoggerObjectTypes.Discussion);
return(new List <MessageViewDTO>());
}
}
private static List <MessageViewDTO> BuildMessageFeedTree(MessageViewDTO[] unsorted, DiscussionSortFields field, CommonEnums.SortDirections dir)
{
var parents = unsorted.Where(x => x.ParentMessageId == null).ToList();
var sortedParents = new List <MessageViewDTO>();
switch (field)
{
case DiscussionSortFields.AddOn:
switch (dir)
{
case CommonEnums.SortDirections.desc:
sortedParents = parents.OrderByDescending(x => x.AddOn).ToList();
break;
case CommonEnums.SortDirections.asc:
sortedParents = parents.OrderBy(x => x.AddOn).ToList();
break;
}
break;
case DiscussionSortFields.CreatorName:
switch (dir)
{
case CommonEnums.SortDirections.desc:
sortedParents = parents.OrderByDescending(x => x.CreatorName).ToList();
break;
case CommonEnums.SortDirections.asc:
sortedParents = parents.OrderBy(x => x.CreatorName).ToList();
break;
}
break;
case DiscussionSortFields.CourseName:
switch (dir)
{
case CommonEnums.SortDirections.desc:
sortedParents = parents.OrderByDescending(x => x.CourseName).ToList();
break;
case CommonEnums.SortDirections.asc:
sortedParents = parents.OrderBy(x => x.CourseName).ToList();
break;
}
break;
}
foreach (var parent in sortedParents)
{
var p = parent;
foreach (var child in unsorted.Where(x => x.ParentMessageId != null && x.ParentMessageId == p.MessageId).OrderByDescending(x => x.PostedOn))
{
p.Replies.Add(child);
}
}
return(sortedParents);
}