public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var token = reader.TokenType;
switch (token)
{
case JsonToken.String:
{
AdaptiveFallbackElement adaptiveFallbackElement = new AdaptiveFallbackElement();
string stringValue = (string)reader.Value;
if (stringValue == "drop")
{
adaptiveFallbackElement.Type = AdaptiveFallbackElement.AdaptiveFallbackType.Drop;
}
else
{
throw new AdaptiveSerializationException("The only valid string value for the fallback property is 'drop'.");
}
return(adaptiveFallbackElement);
}
case JsonToken.StartObject:
{
var jObject = JObject.Load(reader);
var typeName = AdaptiveTypedElementConverter.GetElementTypeName(objectType, jObject);
Type type;
if (!AdaptiveTypedElementConverter.TypedElementTypes.Value.TryGetValue(typeName, out type))
{
type = typeof(AdaptiveUnknownElement);
}
IsInFallback = true;
string objectId = jObject.Value <string>("id");
AdaptiveInternalID internalID = AdaptiveInternalID.Next();
// Handle deserializing unknown element
ParseContext.PushElement(objectId, internalID);
var result = (AdaptiveTypedElement)Activator.CreateInstance(type);
serializer.Populate(jObject.CreateReader(), result);
ParseContext.PopElement();
IsInFallback = false;
AdaptiveFallbackElement adaptiveFallbackElement = new AdaptiveFallbackElement();
adaptiveFallbackElement.Type = AdaptiveFallbackElement.AdaptiveFallbackType.Content;
adaptiveFallbackElement.Content = result;
return(adaptiveFallbackElement);
}
default:
{
throw new AdaptiveSerializationException("Invalid value for fallback");
}
}
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var jObject = JObject.Load(reader);
if (jObject.Value <string>("type") != AdaptiveCard.TypeName)
{
throw new AdaptiveSerializationException($"Property 'type' must be '{AdaptiveCard.TypeName}'");
}
var typedElementConverter = new AdaptiveTypedElementConverter(_parseResult);
var card = (AdaptiveCard)typedElementConverter.ReadJson(jObject.CreateReader(), objectType, existingValue, serializer);
// If this is the root AdaptiveCard and missing a version we fail parsing.
// The depth checks that cards within a Action.ShowCard don't require the version
if (reader.Depth == 0 && card.Version == null)
{
throw new AdaptiveSerializationException("Required property 'version' not found on AdaptiveCard");
}
return(card);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var jObject = JObject.Load(reader);
if (jObject.Value <string>("type") != AdaptiveCard.TypeName)
{
throw new AdaptiveSerializationException($"Property 'type' must be '{AdaptiveCard.TypeName}'");
}
if (reader.Depth == 0)
{
AdaptiveTypedElementConverter.BeginCard();
if (jObject.Value <string>("version") == null)
{
throw new AdaptiveSerializationException("Could not parse required key: version. It was not found.");
}
// If this is the root AdaptiveCard and missing a version we fail parsing.
// The depth checks that cards within a Action.ShowCard don't require the version
if (jObject.Value <string>("version") == "")
{
throw new AdaptiveSerializationException("Property is required but was found empty: version");
}
if (new AdaptiveSchemaVersion(jObject.Value <string>("version")) > AdaptiveCard.KnownSchemaVersion)
{
return(MakeFallbackTextCard(jObject));
}
}
var typedElementConverter = serializer.ContractResolver.ResolveContract(typeof(AdaptiveTypedElement)).Converter;
var card = (AdaptiveCard)typedElementConverter.ReadJson(jObject.CreateReader(), objectType, existingValue, serializer);
card.Lang = ValidateLang(jObject.Value <string>("lang"));
return(card);
}