void ProcessAssembly(Assembly assembly)
{
foreach (var type in assembly.DefinedTypes)
{
foreach (var method in type.DeclaredMethods)
{
CommandAttribute attr = null;
var attrs = method.GetCustomAttributes(typeof(CommandAttribute), false)
.Where(a => a is CommandAttribute);
if (IEnumerableExt.Count(attrs) > 0)
{
attr = attrs.First() as CommandAttribute;
}
if (attr != null)
{
ProcessMethod(method, attr);
}
}
}
}
void ProcessMethod(MethodInfo method, CommandAttribute attr)
{
if (!method.IsStatic)
{
throw new Exception(method.DeclaringType.Name + "." + method.Name +
" is marked as a command, but is not static");
}
else
{
var info = new CommandInfo();
info.Help = attr.Help;
var parameters = method.GetParameters();
var defaults = new object[parameters.Length];
var usage = new string[parameters.Length];
for (var i = 0; i < parameters.Length; i++)
{
var p = parameters[i];
usage[i] = p.Name + ":";
if (p.ParameterType == typeof(string))
{
usage[i] += "string";
}
else if (p.ParameterType == typeof(int))
{
usage[i] += "int";
}
else if (p.ParameterType == typeof(float))
{
usage[i] += "float";
}
else if (p.ParameterType == typeof(bool))
{
usage[i] += "bool";
}
else
{
throw new Exception(method.DeclaringType.Name + "." + method.Name +
" is marked as a command, but has an invalid parameter type. Allowed types are: string, int, float, and bool");
}
// no System.DBNull in PCL so we fake it
if (p.DefaultValue.GetType().FullName == "System.DBNull")
{
defaults[i] = null;
}
else if (p.DefaultValue != null)
{
defaults[i] = p.DefaultValue;
if (p.ParameterType == typeof(string))
{
usage[i] += "=\"" + p.DefaultValue.ToString() + "\"";
}
else
{
usage[i] += "=" + p.DefaultValue.ToString();
}
}
else
{
defaults[i] = null;
}
}
if (usage.Length == 0)
{
info.Usage = "";
}
else
{
info.Usage = "[" + string.Join(" ", usage) + "]";
}
info.Action = args =>
{
if (parameters.Length == 0)
{
method.Invoke(null, null);
}
else
{
var param = (object[])defaults.Clone();
for (var i = 0; i < param.Length && i < args.Length; i++)
{
if (parameters[i].ParameterType == typeof(string))
{
param[i] = ArgString(args[i]);
}
else if (parameters[i].ParameterType == typeof(int))
{
param[i] = ArgInt(args[i]);
}
else if (parameters[i].ParameterType == typeof(float))
{
param[i] = ArgFloat(args[i]);
}
else if (parameters[i].ParameterType == typeof(bool))
{
param[i] = ArgBool(args[i]);
}
}
try
{
method.Invoke(null, param);
}
catch (Exception e)
{
Log(e);
}
}
};
_commands[attr.Name] = info;
}
}
