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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| using System.Reflection; | ||
|
|
||
| namespace Stenguage | ||
| { | ||
| [AttributeUsage(AttributeTargets.Property, Inherited = false, AllowMultiple = false)] | ||
| sealed class ArgumentAttribute : Attribute | ||
| { | ||
| public string ShortName { get; } | ||
| public string LongName { get; } | ||
| public string Description { get; } | ||
| public bool IsRequired { get; } | ||
| public bool IsPositional { get; } | ||
|
|
||
| public ArgumentAttribute(string shortName, string longName, string description, bool isRequired = false, bool isPositional = false) | ||
| { | ||
| ShortName = shortName; | ||
| LongName = longName; | ||
| Description = description; | ||
| IsRequired = isRequired; | ||
| IsPositional = isPositional; | ||
| } | ||
| } | ||
|
|
||
| class ArgumentParser | ||
| { | ||
| public T Parse<T>(string[] args) where T : new() | ||
| { | ||
| T options = new T(); | ||
| var propertyDictionary = GetArgumentProperties<T>(); | ||
|
|
||
| for (int i = 0; i < args.Length; i++) | ||
| { | ||
| var arg = args[i]; | ||
| if (arg.StartsWith("-")) | ||
| { | ||
| if (arg == "--help" || arg == "-h") | ||
| { | ||
| DisplayHelp(propertyDictionary); | ||
| return options; | ||
| } | ||
|
|
||
| string argName = arg.StartsWith("--") ? arg.Substring(2) : arg.Substring(1); | ||
| if (propertyDictionary.TryGetValue(argName, out PropertyInfo property)) | ||
| { | ||
| if (property.PropertyType == typeof(bool)) | ||
| { | ||
| property.SetValue(options, true); | ||
| } | ||
| else if (i + 1 < args.Length) | ||
| { | ||
| i++; | ||
| property.SetValue(options, Convert.ChangeType(args[i], property.PropertyType)); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine($"Unknown argument: {arg}"); | ||
| Environment.Exit(1); | ||
| return options; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| // Treat the argument as a positional argument | ||
| var positionalProperties = propertyDictionary.Values | ||
| .Where(prop => prop.GetCustomAttribute<ArgumentAttribute>().IsPositional) | ||
| .ToList(); | ||
|
|
||
| if (positionalProperties.Count > 0) | ||
| { | ||
| PropertyInfo property = positionalProperties.First(); | ||
| property.SetValue(options, Convert.ChangeType(arg, property.PropertyType)); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine($"Unknown positional argument: {arg}"); | ||
| Environment.Exit(1); | ||
| return options; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Check if required arguments are missing | ||
| var missingRequiredArguments = propertyDictionary.Values | ||
| .Where(prop => prop.GetCustomAttribute<ArgumentAttribute>().IsRequired && prop.GetValue(options) == null) | ||
| .ToList(); | ||
|
|
||
| if (missingRequiredArguments.Count > 0) | ||
| { | ||
| Console.WriteLine("Required argument(s) missing:"); | ||
| foreach (var missingArg in missingRequiredArguments) | ||
| { | ||
| var attribute = missingArg.GetCustomAttribute<ArgumentAttribute>(); | ||
| Console.WriteLine($" -{attribute.ShortName} or --{attribute.LongName}: {attribute.Description}"); | ||
| } | ||
| Environment.Exit(1); | ||
| } | ||
|
|
||
| return options; | ||
| } | ||
|
|
||
| private void DisplayHelp(Dictionary<string, PropertyInfo> propertyDictionary) | ||
| { | ||
| Console.WriteLine("Available Commands:"); | ||
| foreach (var kvp in propertyDictionary) | ||
| { | ||
| var attribute = kvp.Value.GetCustomAttribute<ArgumentAttribute>(); | ||
| Console.WriteLine($" -{attribute.ShortName}, --{attribute.LongName}: {attribute.Description}"); | ||
| } | ||
| Console.WriteLine(" -h, --help: Show this help message"); | ||
| } | ||
|
|
||
| private Dictionary<string, PropertyInfo> GetArgumentProperties<T>() | ||
| { | ||
| var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance); | ||
| var propertyDictionary = new Dictionary<string, PropertyInfo>(); | ||
|
|
||
| foreach (var property in properties) | ||
| { | ||
| var attribute = property.GetCustomAttribute<ArgumentAttribute>(); | ||
| if (attribute != null) | ||
| { | ||
| propertyDictionary[attribute.ShortName] = property; | ||
| propertyDictionary[attribute.LongName] = property; | ||
| } | ||
| } | ||
|
|
||
| return propertyDictionary; | ||
| } | ||
| } | ||
|
|
||
| } |
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