IO.cs

using System;
using System.Net.NetworkInformation;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Gerbil
{
    namespace IO
    {
        class Out
        {
            /// <summary>
            /// Writes a line of text to the CLI.
            /// </summary>
            /// <param name="input">Text to write.</param>
            public static void writeln(string input)
            {
                write(input + "\n");
            }
            /// <summary>
            /// Writes a string of text to the CLI.
            /// </summary>
            /// <param name="input">Text to write.</param>
            public static void write(string input)
            {
                Console.Write(input);
            }
            /// <summary>
            /// Writes a blank line to the CLI.
            /// </summary>
            public static void blank()
            {
                write("\n");
            }
            /// <summary>
            /// Writes a number of blank lines to the CLI.
            /// </summary>
            /// <param name="iterations">Blank lines to insert.</param>
            public static void blank(int iterations)
            {
                for (int i = 0; i < iterations; i++)
                {
                    blank();
                }
            }
            /// <summary>
            /// Prints a formatted menu to the CLI.
            /// </summary>
            /// <param name="title">Title of menu.</param>
            /// <param name="options">List of options to display.</param>
            public static void printMenu(string title, params string[] options)
            {
                writeln(title);
                for (int i = 0; i < options.Length; i++)
                {
                    writeln(i + " - " + options[i]);
                }
            }
        }
        class In
        {
            /// <summary>
            /// Prompts the user for input using a formatted graphical menu.
            /// </summary>
            /// <param name="title">Title of menu.</param>
            /// <param name="options">List of options to display.</param>
            /// <returns>Zero-indexed choice selected by user. (-1 if none)</returns>
            public static int menu(string title, params string[] options)
            {
                Out.printMenu(title, options);
                Out.writeln("-1 to cancel.");
                int result = 0;
                while (true)
                {
                    result = prompt<int>("Option");
                    if(result >= -1 && result < options.Length)
                    {
                        return result;
                    }
                    Out.writeln("Invalid input, enter a valid menu choice.");
                }
            }
            /// <summary>
            /// Prompts the user for input.
            /// </summary>
            /// <typeparam name="T">Type of variable to return.</typeparam>
            /// <param name="prompt">Prompt to display to user.</param>
            /// <returns>Input value by user.</returns>
            public static T prompt<T>(string prompt)
            {
                return prompt<T>(prompt, ':');
            }
            /// <summary>
            /// Prompts the user for input.
            /// </summary>
            /// <typeparam name="T">Type of variable to return.</typeparam>
            /// <param name="prompt">Prompt to display to user.</param>
            /// <param name="promptKey">Prompt char to display.</param>
            /// <returns>Input value by user.</returns>
            public static T prompt<T>(string prompt, char promptKey)
            {
                while (true)
                {
                    Out.write(prompt + promptKey + " ");
                    string inval = Console.ReadLine();
                    try
                    {
                        T store = (T)Convert.ChangeType(inval, typeof(T));
                        return store;
                    }
                    catch
                    {
                        Out.writeln("Invalid input. Please enter a valid input.");
                    }
                }
            }
            /// <summary>
            /// Prompts the user to perfom a dangerous or uncertain task.
            /// </summary>
            /// <param name="module">Name of module seeking permission.</param>
            /// <param name="action">Action being taken by the module.</param>
            /// <returns>Action allowed.</returns>
            public static bool securePrompt(string module, string action)
            {
                Out.writeln(String.Format("GERBIL SECURITY: Module {0} is attempting to {1}.", module, action));
                int result = menu("Allow action?", "Yes", "No");
                if(result == 0)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }
    }
}