ui updates, use services

BinaryDad.AacpsBusAlert.Services/UserService/IUserService.cs

@@ -0,0 +1,8 @@
+namespace BinaryDad.AacpsBusAlert.Services
+{
+    public interface IUserService
+    {
+        ICollection<User> GetUsers();
+        User GetUser(Guid id);
+    }
+}

BinaryDad.AacpsBusAlert.Services/UserService/JsonUserService.cs

@@ -0,0 +1,21 @@
+using Newtonsoft.Json;
+
+namespace BinaryDad.AacpsBusAlert.Services
+{
+    public class JsonUserService : IUserService
+    {
+        public ICollection<User> GetUsers()
+        {
+            var path = Path.Combine(AppContext.BaseDirectory, "users.json");
+
+            var usersJson = File.ReadAllText(path);
+
+            return JsonConvert.DeserializeObject<ICollection<User>>(usersJson);
+        }
+
+        public User GetUser(Guid id)
+        {
+            return GetUsers().First(u => u.Id == id);
+        }
+    }
+}