/// <summary>
/// Returns a DataView object that contains a complete list of threads list for
/// the requested forum and required date & time interval
/// </summary>
/// <param name="forumID">ID of Forum for which the Threadlist is required</param>
/// <param name="limiter">Limits the Threadlist to between now and; last 48 Hrs, Last Week, Last Month, Last Year</param>
/// <param name="minNumberOfThreadsToFetch">The minimum number of threads to fetch if there are less threads available in the limiter interval</param>
/// <param name="minNumberOfNonStickyVisibleThreads">The minimum number of non-sticky visible threads to show. If the # of threads is lower than
/// this number (due to the limiter value), the minNumberOfThreadsToFetch are fetched</param>
/// <param name="canViewNormalThreadsStartedByOthers">If set to true, the user calling the method has the right to view threads started by others.
/// Otherwise only the threads started by the user calling the method are returned.</param>
/// <param name="userID">The userid of the user calling the method.</param>
/// <returns>DataView with all the threads</returns>
public static DataView GetAllThreadsInForumAsDataView(int forumID, ThreadListInterval limiter, short minNumberOfThreadsToFetch,
short minNumberOfNonStickyVisibleThreads, bool canViewNormalThreadsStartedByOthers, int userID)
{
DateTime limiterDate;
// convert the limiter enum to a datetime which we can use in the filters on the thread data, where we'll use the limiter date
// as a filter for the last posting date of a post in a given thread.
switch (limiter)
{
case ThreadListInterval.Last24Hours:
limiterDate = DateTime.Today.AddHours(-24);
break;
case ThreadListInterval.Last48Hours:
limiterDate = DateTime.Today.AddHours(-48);
break;
case ThreadListInterval.LastWeek:
limiterDate = DateTime.Today.AddDays(-7);
break;
case ThreadListInterval.LastMonth:
limiterDate = DateTime.Today.AddMonths(-1);
break;
case ThreadListInterval.LastYear:
limiterDate = DateTime.Today.AddYears(-1);
break;
default:
limiterDate = DateTime.Today.AddHours(-48);
break;
}
var qf = new QueryFactory();
var q = qf.Create();
q.Select(ThreadGuiHelper.BuildQueryProjectionForAllThreadsWithStats(qf));
q.From(ThreadGuiHelper.BuildFromClauseForAllThreadsWithStats(qf));
q.Where(((ThreadFields.IsSticky == true).Or(ThreadFields.ThreadLastPostingDate >= limiterDate)).And(ThreadFields.ForumID == forumID));
// if the user can't view threads started by others, filter out threads started by users different from userID
if (!canViewNormalThreadsStartedByOthers)
{
// caller can't view threads started by others: add a filter so that threads not started by calling user aren't enlisted.
// however sticky threads are always returned so the filter contains a check so the limit is only applied on threads which aren't sticky
// add a filter for sticky threads, add it with 'OR', so sticky threads are always accepted
q.AndWhere((ThreadFields.StartedByUserID == userID).Or(ThreadFields.IsSticky == true));
}
q.OrderBy(ThreadFields.IsSticky.Descending(), ThreadFields.IsClosed.Ascending(), ThreadFields.ThreadLastPostingDate.Descending());
var dao = new TypedListDAO();
var threads = dao.FetchAsDataTable(q);
// count # non-sticky threads. If it's below a given minimum, refetch everything, but now don't fetch on date filtered but at least the
// set minimum. Do this ONLY if the user can view other user's threads. If that's NOT the case, don't refetch anything.
DataView stickyThreads = new DataView(threads, ThreadFieldIndex.IsSticky.ToString() + "=false", "", DataViewRowState.CurrentRows);
if ((stickyThreads.Count < minNumberOfNonStickyVisibleThreads) && canViewNormalThreadsStartedByOthers)
{
// not enough threads available, fetch again,
// first fetch the sticky threads.
q = qf.Create();
q.Select(ThreadGuiHelper.BuildQueryProjectionForAllThreadsWithStats(qf));
q.From(ThreadGuiHelper.BuildFromClauseForAllThreadsWithStats(qf));
q.Where((ThreadFields.IsSticky == true).And(ThreadFields.ForumID == forumID));
q.OrderBy(ThreadFields.ThreadLastPostingDate.Descending());
threads = dao.FetchAsDataTable(q);
// then fetch the rest. Fetch it into the same datatable object to append the rows to the already fetched sticky threads (if any)
q = qf.Create();
q.Select(ThreadGuiHelper.BuildQueryProjectionForAllThreadsWithStats(qf));
q.From(ThreadGuiHelper.BuildFromClauseForAllThreadsWithStats(qf));
q.Where((ThreadFields.IsSticky == false).And(ThreadFields.ForumID == forumID));
q.Limit(minNumberOfThreadsToFetch);
q.OrderBy(ThreadFields.ThreadLastPostingDate.Descending());
dao.FetchAsDataTable(q, threads);
// sort closed threads to the bottom. Do this in-memory as it's a sort operation after projection. Doing it on the server would mean
// a sort operation before projection.
return(new DataView(threads, string.Empty, ThreadFieldIndex.IsClosed.ToString() + " ASC", DataViewRowState.CurrentRows));
}
else
{
return(threads.DefaultView);
}
}
/// <summary>
/// Returns a DataView object that contains a complete list of threads list for
/// the requested forum and required date & time interval
/// </summary>
/// <param name="forumID">ID of Forum for which the Threadlist is required</param>
/// <param name="limiter">Limits the Threadlist to between now and; last 48 Hrs, Last Week, Last Month, Last Year</param>
/// <param name="minNumberOfThreadsToFetch">The minimum number of threads to fetch if there are less threads available in the limiter interval</param>
/// <param name="minNumberOfNonStickyVisibleThreads">The minimum number of non-sticky visible threads to show. If the # of threads is lower than
/// this number (due to the limiter value), the minNumberOfThreadsToFetch are fetched</param>
/// <param name="canViewNormalThreadsStartedByOthers">If set to true, the user calling the method has the right to view threads started by others.
/// Otherwise only the threads started by the user calling the method are returned.</param>
/// <param name="userID">The userid of the user calling the method.</param>
/// <returns>DataView with all the threads</returns>
public static DataView GetAllThreadsInForumAsDataView(int forumID, ThreadListInterval limiter, short minNumberOfThreadsToFetch,
short minNumberOfNonStickyVisibleThreads, bool canViewNormalThreadsStartedByOthers, int userID)
{
DateTime limiterDate;
// convert the limiter enum to a datetime which we can use in the filters on the thread data, where we'll use the limiter date
// as a filter for the last posting date of a post in a given thread.
switch (limiter)
{
case ThreadListInterval.Last24Hours:
limiterDate = DateTime.Today.AddHours(-24);
break;
case ThreadListInterval.Last48Hours:
limiterDate = DateTime.Today.AddHours(-48);
break;
case ThreadListInterval.LastWeek:
limiterDate = DateTime.Today.AddDays(-7);
break;
case ThreadListInterval.LastMonth:
limiterDate = DateTime.Today.AddMonths(-1);
break;
case ThreadListInterval.LastYear:
limiterDate = DateTime.Today.AddYears(-1);
break;
default:
limiterDate = DateTime.Today.AddHours(-48);
break;
}
var qf = new QueryFactory();
var q = qf.Create();
q.Select(ThreadGuiHelper.BuildQueryProjectionForAllThreadsWithStats(qf));
q.From(ThreadGuiHelper.BuildFromClauseForAllThreadsWithStats(qf));
q.Where(((ThreadFields.IsSticky == true).Or(ThreadFields.ThreadLastPostingDate >= limiterDate)).And(ThreadFields.ForumID == forumID));
// if the user can't view threads started by others, filter out threads started by users different from userID
if(!canViewNormalThreadsStartedByOthers)
{
// caller can't view threads started by others: add a filter so that threads not started by calling user aren't enlisted.
// however sticky threads are always returned so the filter contains a check so the limit is only applied on threads which aren't sticky
// add a filter for sticky threads, add it with 'OR', so sticky threads are always accepted
q.AndWhere((ThreadFields.StartedByUserID == userID).Or(ThreadFields.IsSticky == true));
}
q.OrderBy(ThreadFields.IsSticky.Descending(), ThreadFields.IsClosed.Ascending(), ThreadFields.ThreadLastPostingDate.Descending());
var dao = new TypedListDAO();
var threads = dao.FetchAsDataTable(q);
// count # non-sticky threads. If it's below a given minimum, refetch everything, but now don't fetch on date filtered but at least the
// set minimum. Do this ONLY if the user can view other user's threads. If that's NOT the case, don't refetch anything.
DataView stickyThreads = new DataView(threads, ThreadFieldIndex.IsSticky.ToString() + "=false", "", DataViewRowState.CurrentRows);
if((stickyThreads.Count < minNumberOfNonStickyVisibleThreads) && canViewNormalThreadsStartedByOthers)
{
// not enough threads available, fetch again,
// first fetch the sticky threads.
q = qf.Create();
q.Select(ThreadGuiHelper.BuildQueryProjectionForAllThreadsWithStats(qf));
q.From(ThreadGuiHelper.BuildFromClauseForAllThreadsWithStats(qf));
q.Where((ThreadFields.IsSticky == true).And(ThreadFields.ForumID == forumID));
q.OrderBy(ThreadFields.ThreadLastPostingDate.Descending());
threads = dao.FetchAsDataTable(q);
// then fetch the rest. Fetch it into the same datatable object to append the rows to the already fetched sticky threads (if any)
q = qf.Create();
q.Select(ThreadGuiHelper.BuildQueryProjectionForAllThreadsWithStats(qf));
q.From(ThreadGuiHelper.BuildFromClauseForAllThreadsWithStats(qf));
q.Where((ThreadFields.IsSticky == false).And(ThreadFields.ForumID == forumID));
q.Limit(minNumberOfThreadsToFetch);
q.OrderBy(ThreadFields.ThreadLastPostingDate.Descending());
dao.FetchAsDataTable(q, threads);
// sort closed threads to the bottom. Do this in-memory as it's a sort operation after projection. Doing it on the server would mean
// a sort operation before projection.
return new DataView(threads, string.Empty, ThreadFieldIndex.IsClosed.ToString() + " ASC", DataViewRowState.CurrentRows);
}
else
{
return threads.DefaultView;
}
}
