public static PropertyFindResult FindExistingElements(this Project project, params string[] names)
{
var result = new PropertyFindResult
{
OtherUnconditionalElements = new List <XElement>(),
OtherConditionalElements = new List <XElement>()
};
foreach (var name in names)
{
var(unconditional, conditional) = project.PropertyAll(name);
foreach (var child in unconditional)
{
Store(child, ref result.LastUnconditionalElement, result.OtherUnconditionalElements);
}
foreach (var(_, child) in conditional)
{
Store(child, ref result.LastConditionalElement, result.OtherConditionalElements);
}
}
return(result);
void Store(XElement child, ref XElement lastElement, IList <XElement> others)
{
if (lastElement != null)
{
if (child.IsAfter(lastElement))
{
others.Add(lastElement);
lastElement = child;
}
else
{
others.Add(child);
}
}
else
{
lastElement = child;
}
}
}
public static IEnumerable <XElement> All(this PropertyFindResult self)
{
return(self.LastElementIsConditional
? self.AllConditional().Concat(self.AllUnconditional())
: self.AllUnconditional().Concat(self.AllConditional()));
}
public static IEnumerable <XElement> AllConditional(this PropertyFindResult self)
{
return(self.LastConditionalElement != null
? self.OtherConditionalElements.Concat(new[] { self.LastConditionalElement })
: Array.Empty <XElement>());
}