Notes/Services/FileNoteService.cs

namespace BinaryDad.Notes.Services
{
    public class FileNoteService : INoteService
    {
        private readonly string? filePath;

        public FileNoteService(IConfiguration configuration)
        {
            filePath = configuration["ContentFilePath"];

            // ensure initialized
            if (!File.Exists(filePath))
            {
                Save("Hi! Feel free to start typing. Everything will be saved soon after you are done typing.");
            }
        }

        public string Get() => File.ReadAllText(filePath);

        public void Save(string content) => File.WriteAllText(filePath, content);
    }
}