public static object FromObject(this ProjectionParams projectionParams, ExpandoObject @object)
{
var result = new ExpandoObject();
var resultMap = (IDictionary <string, object>)result;
var objectMap = (IDictionary <string, object>)@object;
foreach (var keyValuePair in objectMap)
{
resultMap.Add(keyValuePair);
}
RemoveKeysFromExpandoObject(result, projectionParams);
ProcessProjectionParams(result, projectionParams);
return(result);
}
private static void ProcessProjectionParams(ExpandoObject expandoObject, ProjectionParams projectionParams, int depth = 0, string parentProjection = "")
{
var expandoObjectMap = (IDictionary <string, object>)expandoObject;
foreach (var projection in projectionParams)
{
var propertyNames = projection.Split('.');
if (propertyNames.Length == 1)
{
continue;
}
var propertyName = propertyNames[0];
if (!expandoObjectMap.ContainsKey(propertyName))
{
continue;
}
var propertyValue = expandoObjectMap[propertyName];
var subPropertyName = projection.Substring(propertyName.Length + 1);
var subProjectionParams = ProjectionParams.FromValues(subPropertyName);
if (propertyValue is ExpandoObject)
{
RemoveKeysFromExpandoObject(propertyValue as ExpandoObject, projectionParams, depth + 1, propertyName);
ProcessProjectionParams(propertyValue as ExpandoObject, subProjectionParams, depth + 1, propertyName);
}
else if (propertyValue is List <object> )
{
foreach (var value in propertyValue as List <object> )
{
if (value is ExpandoObject)
{
RemoveKeysFromExpandoObject(value as ExpandoObject, projectionParams, depth + 1, propertyName);
ProcessProjectionParams(value as ExpandoObject, subProjectionParams, depth + 1, propertyName);
}
}
}
}
}
private static void RemoveKeysFromExpandoObject(IDictionary <string, object> expandoObjectMap, ProjectionParams projectionParams, int depth = 0, string parentProjection = "")
{
var projectionKeys = GetProjectionKeys(projectionParams, depth, parentProjection);
var expandoObjectMapKeys = new List <string>(expandoObjectMap.Keys);
foreach (var key in expandoObjectMapKeys)
{
if (!projectionKeys.Contains(key))
{
expandoObjectMap.Remove(key);
}
}
}
