public CategoryRelationLinkWrapper(CategoryRelationLink link, double percentage,
double maxPercentage, ObservableCollection <CategoryRelationLinkWrapper> wrappers,
ObservableCollection <CategoryRelationLink> links)
{
_percentage = percentage;
Link = link;
_links = links;
_wrappers = wrappers;
_selectedCategory = link.Category;
if (_selectedCategory == null)
{
CanBeDeleted = false;
}
else
{
CanBeDeleted = true;
}
DeleteCommand = new RelayCommand((obj) =>
{
_links.Remove(link);
wrappers.Remove(this);
CalculateNewPercentages(true);
CalculateCategories(true);
});
}
private void ResetCategoriesLinkPercentages(Relation entity)
{
double totalPercentage = entity.CategoryLinks.Sum(b => b.Percentage);
if (totalPercentage < 100)
{
CategoryRelationLink categoryTransactionLink = new CategoryRelationLink();
categoryTransactionLink.Percentage = 100 - totalPercentage;
categoryTransactionLink.Relation = entity;
categoryTransactionLink.RelationID = entity.ID;
categoryTransactionLink.UserId = ServiceResolver.GetService <IUserProvider>().GetUserId();
entity.CategoryLinks.Add(categoryTransactionLink);
}
else if (totalPercentage > 100)
{
double hasToBeLess = totalPercentage - 100;
var link = entity.CategoryLinks.Last();
while (link != null && entity.CategoryLinks.Sum(b => b.Percentage) > 100)
{
if (hasToBeLess > link.Percentage)
{
hasToBeLess -= link.Percentage;
link.Percentage = 0;
}
else
{
link.Percentage -= hasToBeLess;
}
link = entity.CategoryLinks.Skip(entity.CategoryLinks.IndexOf(link) - 1).FirstOrDefault();
}
}
}
private void InitializeLinkWrapperIfNonExists()
{
if (LinkWrappers.Count == 0)
{
Relation relation = EditingItem.Result;
CategoryRelationLink link = new CategoryRelationLink();
link.RelationID = relation.ID;
link.Relation = relation;
link.Category = null;
link.CategoryID = null;
LinkWrappers.Add(new CategoryRelationLinkWrapper(link: link, percentage: 100, maxPercentage: 100, wrappers: LinkWrappers, links: EditingItem.Result.CategoryLinks));
}
}
private void AddCategoryToRelation(object obj)
{
Relation relation = EditingItem.Result as Relation;
CategoryRelationLink link = new CategoryRelationLink();
link.RelationID = relation.ID;
link.Relation = relation;
link.CategoryID = SelectedCategory.ID;
link.Category = SelectedCategory;
relation.CategoryLinks.Add(link);
LinkWrappers.Add(new CategoryRelationLinkWrapper(link: link, percentage: 0, maxPercentage: 100 - EditingItem.Result.CategoryLinks.Where(c => c != link).Sum(c => c.Percentage), wrappers: LinkWrappers, links: relation.CategoryLinks));
}
private void CalculateCategories(bool dontIgnoreSelf = false)
{
if (_wrappers.Where(b => b.SelectedCategory == null).Count() == 0)
{
Relation relation = Link.Relation;
CategoryRelationLink link = new CategoryRelationLink();
link.RelationID = Link.RelationID;
link.Relation = relation;
link.Category = null;
link.CategoryID = null;
link.UserId = ServiceResolver.GetService <IUserProvider>().GetUserId();
_links.Add(link);
_wrappers.Add(new CategoryRelationLinkWrapper(link: link, percentage: 0, maxPercentage: 100 - _links.Where(c => c != link || dontIgnoreSelf).Sum(c => c.Percentage), wrappers: _wrappers, links: _links));
}
}
