private static PageResult GetCodePageResult(ScriptContext context, string code, Dictionary <string, object> args)
{
PageResult pageResult = null;
try
{
var page = context.CodeSharpPage(code);
pageResult = new PageResult(page);
args.Each((x, y) => pageResult.Args[x] = y);
return(pageResult);
}
catch (Exception e)
{
if (ScriptContextUtils.ShouldRethrow(e))
{
throw;
}
throw ScriptContextUtils.HandleException(e, pageResult ?? new PageResult(context.EmptyPage));
}
}
public override Task WriteAsync(ScriptScopeContext scope, PageBlockFragment block, CancellationToken token)
{
var invokerCtx = (Tuple <string, MethodInvoker>)scope.Context.CacheMemory.GetOrAdd(block.Argument, key => {
var literal = block.Argument.Span.ParseVarName(out var name);
var strName = name.ToString();
literal = literal.AdvancePastWhitespace();
literal = literal.AdvancePastWhitespace();
var args = TypeConstants.EmptyStringList;
if (!literal.IsEmpty)
{
literal = literal.ParseArgumentsList(out var argIdentifiers);
args = argIdentifiers.Map(x => x.Name);
}
var strFragment = (PageStringFragment)block.Body[0];
var script = ScriptPreprocessors.TransformStatementBody(strFragment.ValueString);
var parsedScript = scope.Context.OneTimePage(script);
MethodInvoker invoker = null;
// Allow recursion by initializing lazy Delegate
object LazyInvoker(object instance, object[] paramValues)
{
if (invoker == null)
{
throw new NotSupportedException($"Uninitialized function '{strName}'");
}
return(invoker(instance, paramValues));
}
invoker = (instance, paramValues) => {
scope.PageResult.StackDepth++;
try
{
var pageResult = new PageResult(parsedScript)
{
Args =
{
[strName] = (MethodInvoker)LazyInvoker
},
StackDepth = scope.PageResult.StackDepth
};
var len = Math.Min(paramValues.Length, args.Count);
for (int i = 0; i < len; i++)
{
var paramValue = paramValues[i];
pageResult.Args[args[i]] = paramValue;
}
var discard = ScriptContextUtils.GetPageResultOutput(pageResult);
if (pageResult.ReturnValue == null)
{
throw new NotSupportedException(ScriptContextUtils.ErrorNoReturn);
}
return(pageResult.ReturnValue.Result);
}
finally
{
scope.PageResult.StackDepth--;
}
};
return(Tuple.Create(strName, invoker));
});
scope.PageResult.Args[invokerCtx.Item1] = invokerCtx.Item2;
return(TypeConstants.EmptyTask);
}