JsonExtensions.cs

namespaceNamespacePrefixPlaceholder.PowerShell.JsonUtilities
{
usingNewtonsoft.Json.Linq;
usingNewtonsoft.Json;
usingSystem;
usingSystem.Linq;

publicstaticclassJsonExtensions
{
/// <summary>
/// Converts "null" strings to actual null values, replaces empty objects, and cleans up arrays.
/// </summary>
/// <param name="token">The JSON token to process.</param>
/// <returns>A cleaned JSON string with unnecessary null values removed.</returns>
publicstaticstringRemoveDefaultNullProperties(thisJTokentoken)
{
try
{
ProcessToken(token);

returntoken.ToString();
}
catch(Exception)
{
returntoken.ToString();// Return original JSON if an error occurs
}
}

privatestaticJTokenProcessToken(JTokentoken)
{
if(tokenisJObjectjsonObject)
{

// Recursively process remaining properties
foreach(varpropertyinjsonObject.Properties().ToList())
{
JTokencleanedValue=ProcessToken(property.Value);

// Convert explicit "null" strings to actual null
if(property.Value.Type==JTokenType.String&&property.Value.ToString().Equals("null",StringComparison.Ordinal))
{
property.Value=JValue.CreateNull();
}

if(property.Value.ToString().Equals("{\r\n}",StringComparison.Ordinal))
{

property.Value=JObject.Parse("{}");// Convert empty object to {}
}

}

// Remove the object itself if ALL properties are removed (empty object)
returnjsonObject.HasValues?jsonObject:null;
}
elseif(tokenisJArrayjsonArray)
{
for(inti=jsonArray.Count-1;i>=0;i--)
{
JTokenitem=jsonArray[i];

// Process nested objects/arrays inside the array
if(itemisJObject||itemisJArray)
{
if(item.ToString().Equals("{\r\n}",StringComparison.Ordinal))
{
JTokencleanedItem=ProcessToken(item);
jsonArray[i]=JObject.Parse("{}");// Convert empty object to {}
}
else
{
JTokencleanedItem=ProcessToken(item);
jsonArray[i]=cleanedItem;// Update with cleaned version
}

}
elseif(item.Type==JTokenType.String&&item.ToString().Equals("null",StringComparison.Ordinal))
{
jsonArray[i]=JValue.CreateNull();// Convert "null" string to JSON null
}
elseif(item.Type==JTokenType.String&&item.ToString().Equals("nullarray",StringComparison.Ordinal))
{
jsonArray.RemoveAt(i);
i--;
}

}

returnjsonArray.HasValues?jsonArray:null;
}

returntoken;
}
}
}