/// <summary>
/// Generates usage information for a terminal
/// </summary>
public static string HelpOn(ITerminal terminal)
{ //****************************************
var HasCommands = false;
var HasVariables = false;
var HasTypes = false;
var Builder = new StringBuilder();
bool IsFirst;
//****************************************
foreach (var Registry in terminal.Registries)
{
HasCommands |= Registry.Commands.Count > 0;
HasVariables |= Registry.Variables.Count > 0;
HasTypes |= Registry.TypeSets.Count > 0;
}
if (HasCommands)
{
Builder.AppendLine("Available Commands:").Append(" ");
IsFirst = true;
foreach (var Command in
terminal.Registries.SelectMany(registry => registry.Commands)
.Concat(terminal.Registries.SelectMany(registry => registry.DefaultInstances).SelectMany(instance => instance.Type.Commands))
.OrderBy(command => command)
)
{
if (IsFirst)
{
IsFirst = false;
}
else
{
Builder.Append(", ");
}
Builder.Append(Command.ToString());
}
}
if (HasVariables)
{
if (Builder.Length > 0)
{
Builder.AppendLine();
}
Builder.AppendLine("Available Variables:").Append(" ");
IsFirst = true;
foreach (var Variable in
terminal.Registries.SelectMany(registry => registry.Variables)
.Concat(terminal.Registries.SelectMany(registry => registry.DefaultInstances).SelectMany(instance => instance.Type.Variables))
.OrderBy(variable => variable))
{
if (IsFirst)
{
IsFirst = false;
}
else
{
Builder.Append(", ");
}
Builder.Append(Variable.ToString());
}
}
if (HasTypes)
{
if (Builder.Length > 0)
{
Builder.AppendLine();
}
Builder.AppendLine("Available Types:").Append(" ");
IsFirst = true;
foreach (var TypeSet in terminal.Registries.SelectMany(registry => registry.TypeSets).Where(type => type.HasInstance).OrderBy(type => type))
{
if (IsFirst)
{
IsFirst = false;
}
else
{
Builder.Append(", ");
}
Builder.Append(TypeSet.ToString());
}
}
return(Builder.ToString());
}