public static string?FindParentOfTarget(ref EditableJsonElement current, JsonPointer path)
{
foreach (var segment in path.Segments.Take(path.Segments.Length - 1))
{
if (current.Object != null)
{
if (current.Object.TryGetValue(segment.Value, out current))
{
continue;
}
}
else if (current.Array != null)
{
if (segment.Value == "-")
{
current = current.Array.Last();
continue;
}
if (int.TryParse(segment.Value, out var index) &&
0 <= index && index < current.Array.Count)
{
current = current.Array[index];
continue;
}
}
return($"Path `{path}` could not be reached.");
}
return(null);
}
private static string?RemoveSource(EditableJsonElement fromParent, string lastSegment, JsonPointer path)
{
if (fromParent.Object != null)
{
if (fromParent.Object.TryGetValue(lastSegment, out _))
{
fromParent.Object.Remove(lastSegment);
return(null);
}
}
else if (fromParent.Array != null)
{
if (lastSegment == "-")
{
fromParent.Array.RemoveAt(fromParent.Array.Count - 1);
return(null);
}
if (int.TryParse(lastSegment, out var index) && -1 <= index && index < fromParent.Array.Count)
{
fromParent.Array.RemoveAt(index);
return(null);
}
}
return($"Path `{path}` is not present in the instance.");
}
public static string?FindTarget(ref EditableJsonElement current, JsonPointer path)
{
foreach (var segment in path.Segments)
{
if (current.Object != null)
{
if (current.Object.TryGetValue(segment.Value, out current))
{
continue;
}
}
else if (current.Array != null)
{
if (segment.Value == "-")
{
current = current.Array.Last();
continue;
}
if (int.TryParse(segment.Value, out var index) &&
0 <= index && index < current.Array.Count)
{
if ((index != 0 && segment.Value[0] == '0') ||
(index == 0 && segment.Value.Length > 1))
{
return($"Path `{path}` is not present in the instance.");
}
current = current.Array[index];
continue;
}
}
return($"Path `{path}` could not be reached.");
}
return(null);
}