private bool TryResolvePath(ContentHint input, [MaybeNullWhen(returnValue: false)] out WebPath path)
{
var resolved = new PathBuilder(Routing.Path.TrailingSlash);
foreach (var segment in Routing.Path.Parts)
{
if (segment.StartsWith(':'))
{
if (input.TryGetValue(segment.Substring(1), out var value))
{
if (value != null)
{
resolved.Append(Convert.ToString(value, CultureInfo.InvariantCulture));
}
else
{
path = default;
return(false);
}
}
else
{
path = default;
return(false);
}
}
else
{
resolved.Append(segment);
}
}
path = resolved.Build();
return(true);
}
private bool TrySimulateArguments(IRequest request, ContentHint input, [MaybeNullWhen(returnValue: false)] out object?[] arguments)
{
var targetParameters = Method.GetParameters();
var targetArguments = new object?[targetParameters.Length];
if (TryResolvePath(input, out var path))
{
request.Properties[$"_{ID}_matchedPath"] = path;
}
else
{
arguments = default;
return(false);
}
for (int i = 0; i < targetParameters.Length; i++)
{
var par = targetParameters[i];
// request
if (par.ParameterType == typeof(IRequest))
{
targetArguments[i] = request;
continue;
}
// handler
if (par.ParameterType == typeof(IHandler))
{
targetArguments[i] = this;
continue;
}
// set from the given input set
if (input.TryGetValue(par.Name, out var value))
{
targetArguments[i] = value;
continue;
}
}
arguments = targetArguments;
return(true);
}
private bool TryGetHandler(IRequest request, ContentHint input, [MaybeNullWhen(returnValue: false)] out IHandler handler)
{
if (Method.ReturnType == typeof(IHandlerBuilder) || Method.ReturnType == typeof(IHandler))
{
if (TrySimulateArguments(request, input, out var arguments))
{
var result = Invoke(arguments);
if (result is IHandlerBuilder builder)
{
handler = builder.Build(this);
return(true);
}
else if (result is IHandler resultHandler)
{
handler = resultHandler;
return(true);
}
}
}
handler = default;
return(false);
}