/// <summary>
/// Returns the root CoursePlugg. The root CoursePlugg has CoursePluggId = 0. It has all first level CoursePluggs as children.
/// Navigate up and down hierarchy using children[] and Mother.
/// </summary>
/// <param name="cultureCode"></param>
/// <param name="list"></param>
/// <returns></returns>
public CoursePlugg RootCoursePlugg(int courseId, string cultureCode, IEnumerable<CoursePlugg> list = null)
{
if (list == null)
list = GetPluggsAsFlatList(courseId, cultureCode);
CoursePlugg root = new CoursePlugg();
root.children = new List<CoursePlugg>();
Dictionary<int, CoursePlugg> dict = new Dictionary<int, CoursePlugg>();
foreach (CoursePlugg s in list)
{
dict.Add(s.CoursePluggId, s);
s.children = new List<CoursePlugg>();
}
foreach (CoursePlugg e in list)
{
if (e.MotherId == 0)
{
root.children.Add(e);
e.Mother = root;
}
else
{
dict[e.MotherId].children.Add(e);
e.Mother = dict[e.MotherId];
}
}
return root;
}
/// <summary>
/// Converts a flat list of all CoursePluggs into a hierarchy.
/// Will set Mother as well as Children
/// </summary>
/// <param name="list"></param>
/// <param name="Id"></param>
/// <param name="_isChildren"></param>
/// <returns></returns>
public List<CoursePlugg> FlatToHierarchy(IEnumerable<CoursePlugg> list, int motherId = 0, CoursePlugg mother = null)
{
return (from i in list
where i.MotherId == motherId
select new CoursePlugg
{
CoursePluggId = i.CoursePluggId,
CourseId = i.CourseId,
PluggId = i.PluggId,
CPOrder = i.CPOrder,
MotherId = i.MotherId,
label = i.label,
//Mother = mother,
children = FlatToHierarchy(list, i.CoursePluggId, i),
CreatedOnDate = i.CreatedOnDate,
CreatedByUserId = i.CreatedByUserId
}).ToList();
}
/// <summary>
/// Retrieve next CoursePlugg in hierarchy (Think of an expanded CoursePlugg tree. Will get the "next row")
/// </summary>
/// <param name="current"></param>
/// <param name="_lastCoursePlugg"></param>
/// <param name="previousChildOrder"></param>
/// <returns></returns>
public CoursePlugg NextCoursePlugg(CoursePlugg cp)
{
bool SearchChildren = true;
while (1 == 1)
{
if (cp.CoursePluggId == 0)
return null;
if (SearchChildren && cp.children.Count > 0)
return cp.children[0];
if (cp.Mother.children.Count > cp.CPOrder)
return cp.Mother.children[cp.CPOrder];
cp = cp.Mother;
SearchChildren = false;
}
}
/// <summary>
/// Find a specific CoursePlugg in the hierarchy. Navigate up and down hierarchy using children[] and Mother.
/// </summary>
/// <param name="cultureCode"></param>
/// <param name="coursePluggId"></param>
/// <param name="root"></param>
/// <returns></returns>
public CoursePlugg FindCoursePlugg(string cultureCode, int courseId, int coursePluggId, CoursePlugg root = null)
{
if (root == null)
root = RootCoursePlugg(courseId, cultureCode);
foreach (CoursePlugg cp in root.children)
{
if (cp.CoursePluggId == coursePluggId)
return cp;
if (cp.children.Count > 0)
{
CoursePlugg fcp = FindCoursePlugg(cultureCode, courseId, coursePluggId, cp);
if (fcp != null)
return fcp;
}
}
return null;
}