Updated the FileViewer form to populate the listing of files and performs pattern matching based on the folder group's pattern regex.

DataOrganizer/DB.cs

@@ -306,6 +306,47 @@ namespace DataOrganizer
             return conventions;
         }
 
+        public string GetNamingPatternById(int id)
+        {
+            if (id == 0) return string.Empty;
+
+            var query = @"SELECT regex FROM main.naming_pattern WHERE pattern_id = @ID";
+
+            using (var connection = new SqliteConnection(ConnectionString))
+            {
+                using (var command = new SqliteCommand(query, connection))
+                {
+                    command.Parameters.AddWithValue("ID", id);
+                    connection.Open();
+
+                    var reader = command.ExecuteReader();
+
+                    reader.Read();
+
+                    return reader["regex"].ToString();
+                }
+            }
+        }
+
+        public bool UpdateNamingPatterById(int id, string newPattern)
+        {
+            var query = @"UPDATE main.naming_pattern SET regex = @pattern WHERE pattern_id = @ID";
+
+            using (var connection = new SqliteConnection(ConnectionString))
+            {
+                using (var command = new SqliteCommand(query, connection))
+                {
+                    command.Parameters.AddWithValue("pattern", newPattern);
+                    command.Parameters.AddWithValue("ID", id);
+                    connection.Open();
+
+                    command.ExecuteNonQuery();
+                }
+            }
+
+            return true;
+        }
+
         public struct Profile
         {
             public string Name;