private static void ClearArray(JObject finalObject, IPath attributePath)
{
JToken array = (JArray)finalObject[attributePath.AttributePath];
List <JToken> arrayItems = array.Children().ToList();
foreach (JToken arItem in arrayItems)
{
if (ColumnsUtility.MatchArrayItem(arItem, attributePath))
{
arItem.Remove();
}
}
}
private static void ClearObject(JToken finalObject, IPath attributePath)
{
//Assume that object allreay exists
JToken token = finalObject[attributePath.AttributePath];
IPath nextLevelAttribute = attributePath.ValuePath;
JToken internalProperty = token[nextLevelAttribute.AttributePath];
if (nextLevelAttribute.ValuePath != null)
{
internalProperty.Remove();
}
else
{
ColumnsUtility.ClearObject(token, nextLevelAttribute);
}
}
private static void AddObject(JObject finalObject, IPath attributePath, JToken itemValue)
{
JObject jobject = (JObject)finalObject[attributePath.AttributePath];
IPath nextlevelAttribe = attributePath.ValuePath;
if (nextlevelAttribe == null)
{
finalObject.Add(attributePath.AttributePath, jobject);
}
else
{
JObject emptyObject = new JObject();
finalObject.Add(attributePath.AttributePath, emptyObject);
JToken item = itemValue[nextlevelAttribe.AttributePath];
ColumnsUtility.AddObject(emptyObject, nextlevelAttribe, item);
}
}
private static T BuildResouce <T>(IEnumerable <string> requestedAttributes, IEnumerable <string> excludedAttributes, string[] allwaysRetuned, T resource)
{
JObject result = new JObject();
Type objectType = resource.GetType();
JObject projectedResrouce = JObject.FromObject(resource);
if (!requestedAttributes.Any() && !excludedAttributes.Any())
{
return(resource);
}
foreach (string requestedAtt in requestedAttributes)
{
if (Path.TryParse(requestedAtt, out IPath attributePath))
{
JToken itemValue = projectedResrouce[attributePath.AttributePath];
if (itemValue != null)
{
switch (itemValue.Type)
{
case JTokenType.Array:
if (!attributePath.SubAttributes.Any())
{
result.Add(attributePath.AttributePath, itemValue);
}
else
{
AddArray(result, attributePath, itemValue);
}
break;
case JTokenType.Object:
ColumnsUtility.AddObject(result, attributePath, itemValue);
break;
default:
result.Add(attributePath.AttributePath, itemValue);
break;
}
}
}
}
foreach (string requestedAtt in allwaysRetuned)
{
if (Path.TryParse(requestedAtt, out IPath attributePath))
{
JToken itemValue = projectedResrouce[attributePath.AttributePath];
if (itemValue != null)
{
switch (itemValue.Type)
{
case JTokenType.Array:
if (!attributePath.SubAttributes.Any())
{
result.Add(attributePath.AttributePath, itemValue);
}
else
{
ColumnsUtility.AddArray(result, attributePath, itemValue);
}
break;
case JTokenType.Object:
ColumnsUtility.AddObject(result, attributePath, itemValue);
break;
default:
result.Add(attributePath.AttributePath, itemValue);
break;
}
}
}
}
if (!requestedAttributes.Any() && excludedAttributes.Any())
{
result = projectedResrouce;
}
foreach (string excluded in excludedAttributes)
{
if (Path.TryParse(excluded, out IPath attributePath))
{
JToken itemValue = projectedResrouce[attributePath.AttributePath];
if (itemValue != null)
{
switch (itemValue.Type)
{
case JTokenType.Array:
if (!attributePath.SubAttributes.Any())
{
result[attributePath.AttributePath].Remove();
}
else
{
ColumnsUtility.ClearArray(result, attributePath);
}
break;
case JTokenType.Object:
if (attributePath.ValuePath == null)
{
result[attributePath.AttributePath].Remove();
}
else
{
ColumnsUtility.ClearObject(result, attributePath);
}
break;
default:
result[attributePath.AttributePath].Remove();
break;
}
}
}
}
return((T)result.ToObject(objectType));
}
public static T FilterAttributes <T>(IEnumerable <string> requestedAttributes, IEnumerable <string> excludedAttributes, T projectedResouce, string[] allwaysRetuned) where T : Resource
{
return(ColumnsUtility.BuildResouce(requestedAttributes, excludedAttributes, allwaysRetuned, projectedResouce));
}
