private void GetAllUsage(CommandNode <TSource> node, TSource source, List <string> result, string prefix, bool restricted)
{
if (restricted && !node.CanUse(source))
{
return;
}
if (node.Command != null)
{
result.Add(prefix);
}
if (node.Redirect != null)
{
var redirect = node.Redirect == _root ? "..." : "-> " + node.Redirect.UsageText;
result.Add(prefix.Length == 0 ? node.UsageText + ArgumentSeparator + redirect : prefix + ArgumentSeparator + redirect);
}
else if (node.Children.Count > 0)
{
foreach (var child in node.Children)
{
GetAllUsage(child, source, result, prefix.Length == 0 ? child.UsageText : prefix + ArgumentSeparator + child.UsageText, restricted);
}
}
}
private string GetSmartUsage(CommandNode <TSource> node, TSource source, bool optional, bool deep)
{
if (!node.CanUse(source))
{
return(null);
}
var self = optional ? UsageOptionalOpen + node.UsageText + UsageOptionalClose : node.UsageText;
var childOptional = node.Command != null;
var open = childOptional ? UsageOptionalOpen : UsageRequiredOpen;
var close = childOptional ? UsageOptionalClose : UsageRequiredClose;
if (!deep)
{
if (node.Redirect != null)
{
var redirect = node.Redirect == _root ? "..." : "-> " + node.Redirect.UsageText;
return(self + ArgumentSeparator + redirect);
}
else
{
var children = node.Children.Where(c => c.CanUse(source)).ToList();
if (children.Count == 1)
{
var usage = GetSmartUsage(children.Single(), source, childOptional, childOptional);
if (usage != null)
{
return(self + ArgumentSeparator + usage);
}
}
else if (children.Count > 1)
{
ISet <string> childUsage = new HashSet <string>();
foreach (var child in children)
{
var usage = GetSmartUsage(child, source, childOptional, true);
if (usage != null)
{
childUsage.Add(usage);
}
}
if (childUsage.Count == 1)
{
var usage = childUsage.Single();
return(self + ArgumentSeparator + (childOptional ? UsageOptionalOpen + usage + UsageOptionalClose : usage));
}
else if (childUsage.Count > 1)
{
var builder = new StringBuilder(open);
var count = 0;
foreach (var child in children)
{
if (count > 0)
{
builder.Append(UsageOr);
}
builder.Append(child.UsageText);
count++;
}
if (count > 0)
{
builder.Append(close);
return(self + ArgumentSeparator + builder);
}
}
}
}
}
return(self);
}