/// <summary>
/// Updates the user/forum/thread statistics after a message insert. Also makes sure if the thread isn't in a queue and the forum has a default support
/// queue that the thread is added to that queue
/// </summary>
/// <param name="threadId">The thread ID.</param>
/// <param name="userId">The user ID.</param>
/// <param name="newMessageId">The message id of the new message posted in the thread with threadid. If 0 or lower it's ignored and threadstatistics
/// aren't updated. This is the case for when a new thread: the first message insert already inserted a correct threadstatistics object. </param>
/// <param name="adapter">The adapter to use, which is assumed to have a live transaction active</param>
/// <param name="postingDate">The posting date.</param>
/// <param name="addToQueueIfRequired">if set to true, the thread will be added to the default queue of the forum the thread is in, if the forum
/// has a default support queue and the thread isn't already in a queue.</param>
/// <param name="subscribeToThread">if set to <c>true</c> [subscribe to thread].</param>
/// <remarks>
/// Leaves the passed in transaction open, so it doesn't commit/rollback, it just performs a set of actions inside the
/// passed in transaction.
/// </remarks>
internal static async Task UpdateStatisticsAfterMessageInsert(int threadId, int userId, int newMessageId, IDataAccessAdapter adapter, DateTime postingDate,
bool addToQueueIfRequired, bool subscribeToThread)
{
// user statistics
var userUpdater = new UserEntity();
// set the amountofpostings field to an expression so it will be increased with 1. Update the entity directly in the DB
userUpdater.Fields[(int)UserFieldIndex.AmountOfPostings].ExpressionToApply = (UserFields.AmountOfPostings + 1);
await adapter.UpdateEntitiesDirectlyAsync(userUpdater, new RelationPredicateBucket(UserFields.UserID.Equal(userId)))
.ConfigureAwait(false);
if (newMessageId > 0)
{
// thread statistics. Create a single Update query which updates the messageid and increases the number of messages value with 1
var threadStatisticsUpdater = new ThreadStatisticsEntity {
LastMessageID = newMessageId
};
threadStatisticsUpdater.Fields[(int)ThreadStatisticsFieldIndex.NumberOfMessages].ExpressionToApply = (ThreadStatisticsFields.NumberOfMessages + 1);
await adapter.UpdateEntitiesDirectlyAsync(threadStatisticsUpdater, new RelationPredicateBucket(ThreadStatisticsFields.ThreadID.Equal(threadId)))
.ConfigureAwait(false);
}
// unmark the thread as done if it's done
var threadUpdater = new ThreadEntity()
{
MarkedAsDone = false
};
await adapter.UpdateEntitiesDirectlyAsync(threadUpdater, new RelationPredicateBucket(ThreadFields.ThreadID.Equal(threadId)))
.ConfigureAwait(false);
// forum statistics. Load the forum from the DB, as we need it later on. Use a nested query to fetch the forum as we don't know the
// forumID as we haven't fetched the thread
var qf = new QueryFactory();
var q = qf.Forum
.Where(ForumFields.ForumID.In(qf.Create()
.Select(ThreadFields.ForumID)
.Where(ThreadFields.ThreadID.Equal(threadId))));
var containingForum = await adapter.FetchFirstAsync(q).ConfigureAwait(false);
if (containingForum != null)
{
containingForum.ForumLastPostingDate = postingDate;
// save the forum.
await adapter.SaveEntityAsync(containingForum, true).ConfigureAwait(false);
if (addToQueueIfRequired && containingForum.DefaultSupportQueueID.HasValue)
{
// If the thread involved isn't in a queue, place it in the default queue of the forum (if applicable)
var containingQueue = await SupportQueueGuiHelper.GetQueueOfThreadAsync(threadId, adapter);
if (containingQueue == null)
{
// not in a queue, and the forum has a default queue. Add the thread to the queue of the forum
await SupportQueueManager.AddThreadToQueueAsync(threadId, containingForum.DefaultSupportQueueID.Value, userId, adapter);
}
}
}
//subscribe to thread if indicated
if (subscribeToThread)
{
await UserManager.AddThreadToSubscriptionsAsync(threadId, userId, adapter);
}
}