FileUtils.cs

namespace VModLoader
{
    /// <summary>
    /// A static class containing various file utilities.
    /// </summary>
    internal static class FileUtils
    {
        /// <summary>
        /// The path seperator character.
        /// </summary>
        static readonly string C = Path.DirectorySeparatorChar.ToString();

        /// <summary>
        /// The filepath of the main runtime data folder.
        /// </summary>
        static readonly string MAIN_RUNTIME_FOLDER = "data" + C;
        
        /// <summary>
        /// The name referring to the runtime data folder.
        /// </summary>
        public static readonly string MAIN_RUNTIME_FOLDER_NAME = nameof(MAIN_RUNTIME_FOLDER);

        /// <summary>
        /// The mod data file path.
        /// </summary>
        static readonly string MOD_DATA = MAIN_RUNTIME_FOLDER + "moddata.vml";
        
        /// <summary>
        /// The name referring to the mod data file.
        /// </summary>
        public static readonly string MOD_DATA_NAME = nameof(MOD_DATA);

        /// <summary>
        /// Gets the filepath of a required file by name.
        /// </summary>
        /// <param name="name">The name of the file.</param>
        /// <returns>The filepath, or null if none.</returns>
        internal static string? GetRequiredFile(string name)
        {
            REQUIRED_FILENAMES.TryGetValue(name, out string? r);
            return r;
        }

        /// <summary>
        /// A dictionary of required filenames.
        /// </summary>
        static readonly Dictionary<string, string> REQUIRED_FILENAMES = new()
        {
            { MAIN_RUNTIME_FOLDER_NAME, MAIN_RUNTIME_FOLDER },
            { MOD_DATA_NAME, MOD_DATA },
        };

        /// <summary>
        /// Initializes the program with all required filepaths.
        /// </summary>
        internal static void Initialize()
        {
            foreach (KeyValuePair<string, string> file in REQUIRED_FILENAMES)
            {
                string path = file.Value;

                if (Path.EndsInDirectorySeparator(path))
                {
                    // Is directory, treat it as such.
                    Directory.CreateDirectory(path);
                } else
                {
                    // Is file, treat it as such.
                    if (!File.Exists(path))
                        File.Create(path).Close();
                }
            }
        }
    }
}