public static void InvokeTaskCallback(string id, string result)
{
var reference = TrackedReference.Get(id);
var function = reference.TrackedInstance as Action <string>;
function(result);
}
public static void Track(string id, object reference)
{
var trackedRef = new TrackedReference(id, reference);
if (References.ContainsKey(id))
{
throw new InvalidOperationException($"An element with id '{id}' is already being tracked.");
}
References.Add(id, trackedRef);
}
public static Task <TResult> InvokeJavaScriptFunctionAsync <TResult>(string identifier, params object[] args)
{
var tcs = new TaskCompletionSource <TResult>();
var argsJson = args.Select(JsonUtil.Serialize);
var successId = Guid.NewGuid().ToString();
var failureId = Guid.NewGuid().ToString();
var asyncProtocol = JsonUtil.Serialize(new
{
Success = successId,
Failure = failureId,
Function = new MethodOptions
{
Type = new TypeInstance
{
Assembly = typeof(JavaScriptInvoke).Assembly.FullName,
TypeName = typeof(JavaScriptInvoke).FullName
},
Method = new MethodInstance
{
Name = nameof(JavaScriptInvoke.InvokeTaskCallback),
ParameterTypes = new[]
{
new TypeInstance
{
Assembly = typeof(string).Assembly.FullName,
TypeName = typeof(string).FullName
},
new TypeInstance
{
Assembly = typeof(string).Assembly.FullName,
TypeName = typeof(string).FullName
}
}
}
}
});
TrackedReference.Track(successId, new Action <string>(r =>
{
var res = JsonUtil.Deserialize <TResult>(r);
tcs.SetResult(res);
}));
TrackedReference.Track(failureId, (new Action <string>(r =>
{
tcs.SetException(new InvalidOperationException(r));
})));
var resultJson = RegisteredFunction.InvokeUnmarshalled <string>(
"invokeWithJsonMarshallingAsync",
argsJson.Prepend(asyncProtocol).Prepend(identifier).ToArray());
return(tcs.Task);
}