early work on supporting multiple files

Services/FileNoteService.cs

@@ -2,27 +2,38 @@
 {
     public class FileNoteService : INoteService
     {
-        private readonly string? filePath;
+        private readonly string? defaultFileName;
 
         public FileNoteService(IConfiguration configuration)
         {
-            filePath = configuration["ContentFilePath"];
+            defaultFileName = configuration["ContentFilePath"];
+
+            CheckFile(defaultFileName);
+        }
+
+        public string Get(string? noteName)
+        {
+            CheckFile(noteName);
+
+            return File.ReadAllText(GetFileName(noteName));
+        }
+
+        public void Save(string content, string? noteName)
+        {
+            File.WriteAllText(GetFileName(noteName), content);
+        }
+
+        private void CheckFile(string noteName)
+        {
+            var fileName = GetFileName(noteName);
 
             // ensure initialized
-            if (!File.Exists(filePath))
+            if (!File.Exists(fileName))
             {
-                Save("Hi! Feel free to start typing. Everything will be saved soon after you are done typing.");
+                Save("Hi! Feel free to start typing. Everything will be saved soon after you are done typing.", fileName);
             }
         }
 
-        public string Get()
-        {
-            return File.ReadAllText(filePath);
-        }
-
-        public void Save(string content)
-        {
-            File.WriteAllText(filePath, content);
-        }
+        private string GetFileName(string? noteName) => string.IsNullOrWhiteSpace(noteName) ? defaultFileName : noteName;
     }
 }

Services/INoteService.cs

@@ -2,7 +2,7 @@
 {
     public interface INoteService
     {
-        string Get();
-        void Save(string content);
+        string Get(string? noteName);
+        void Save(string content, string? noteName);
     }
 }