public void RegisterHelper(IHandlebarsHelper helper)
{
if (helper == null)
{
throw new ArgumentNullException(nameof(helper));
}
RegisterHelper(helper.Name, helper.Execute);
}
private void ValidateRegisterHelper(IHandlebarsHelper helper)
{
if (helper == null)
{
throw new ArgumentNullException(nameof(helper));
}
if (string.IsNullOrEmpty(helper.HelperName))
{
throw new ArgumentException(GetMessageOfNullEmpty(nameof(helper.HelperName)), nameof(helper));
}
if (_handlebars.Configuration.Helpers.ContainsKey(helper.HelperName) ||
_handlebars.Configuration.BlockHelpers.ContainsKey(helper.HelperName))
{
throw new InvalidOperationException(string.Format("override not allowed for registered helper {{{{{0}}}}}", helper.HelperName));
}
}
public void RegisterHandlebarsHelper(IHandlebarsHelper helper)
{
ViewEngine.RegisterHelper(helper);
}
//--
public void RegisterHelper(IHandlebarsHelper helper)
{
ValidateRegisterHelper(helper);
_handlebars.RegisterHelper(helper.HelperName, helper.HelperFunction);
}
