public static string[] GetHelpText()
{
T obj = new T();
List <string> helpLines = new List <string>();
Dictionary <string, PropArg> propArgs = PropArgMatcher <T> .MatchPropertirsAndArguments(obj);
foreach (var propArg in propArgs)
{
string line = string.Empty;
if (!propArg.Value.Argument.Required)
{
line += "[";
}
line += "-" + propArg.Key + " <";
if (propArg.Value.Property.PropertyType == typeof(int))
{
line += "int";
}
else if (propArg.Value.Property.PropertyType == typeof(float))
{
line += "float";
}
else if (propArg.Value.Property.PropertyType == typeof(decimal))
{
line += "decimal";
}
else if (propArg.Value.Property.PropertyType == typeof(string))
{
line += "string";
}
else if (propArg.Value.Property.PropertyType == typeof(bool))
{
line += "bool";
}
line += ">";
if (propArg.Value.Property.GetValue(obj) != null)
{
line += " (" + propArg.Value.Property.GetValue(obj).ToString() + ")";
}
if (!propArg.Value.Argument.Required)
{
line += "]";
}
line = line.PadRight(40);
line += propArg.Value.Argument.Description;
helpLines.Add(line);
}
return(helpLines.ToArray());
}
public static T Parse(string[] args, string argumentNameSwitch = ArgumentNameSwitch)
{
var obj = new T();
Dictionary <string, PropArg> propArgs = PropArgMatcher <T> .MatchPropertirsAndArguments(obj);
int requiredCount = propArgs.Count(propArg => propArg.Value.Argument.Required);
int foundCounter = 0;
int requiredCounter = 0;
List <string> errors = new List <string>();
for (int i = 0; i < args.Length; i++)
{
if (args[i].StartsWith(argumentNameSwitch)) // named argument
{
string propName = args[i].Substring(1);
if (propArgs.ContainsKey(propName))
{
var prop = propArgs[propName].Property;
if (prop.PropertyType != typeof(bool) && i < args.Length - 1)
{
string argVal = args[i + 1];
if (SetValue(prop, obj, argVal, ref requiredCounter))
{
foundCounter++;
i++;
continue;
}
else
{
errors.Add($"Error assigning value of {argVal} to property {propName}");
}
}
else if (prop.PropertyType == typeof(bool))
{
// peek next entry
string val = (i < args.Length - 1 && !args[i + 1].StartsWith(argumentNameSwitch)) ? args[i + 1] : "true";
if (SetValue(prop, obj, val, ref requiredCounter))
{
foundCounter++;
if (i < args.Length - 1 && !args[i + 1].StartsWith(argumentNameSwitch))
{
i++;
}
}
else
{
errors.Add($"Error assigning value of {val} to property {propName}");
}
continue;
}
}
else
{
errors.Add($"Unknown named property {args[i].Substring(1)}");
}
}
else // position argument
{
var prop = propArgs.ElementAt(foundCounter).Value.Property;
if (SetValue(prop, obj, args[i], ref requiredCounter))
{
foundCounter++;
}
else
{
errors.Add($"Error assigning value of {args[i]} to property {args[i].Substring(1)}");
}
}
}
if (requiredCounter != requiredCount)
{
throw new Exception("Error parsing argument: not all required arguments found.");
}
if (errors.Count() > 0)
{
throw new Exception("Error parsing arguments: not all properties could be set\n" + string.Join("\n", errors));
}
return(obj);
}