refactor: ...

1 files changed, 36 insertions, 0 deletions

diff --git a/BackEnd/Timeline/Services/User/IBasicUserService.cs b/BackEnd/Timeline/Services/User/IBasicUserService.cs
new file mode 100644
index 00000000..0e30d733
--- /dev/null
+++ b/BackEnd/Timeline/Services/User/IBasicUserService.cs
@@ -0,0 +1,36 @@
+using System;

+using System.Threading.Tasks;

+

+namespace Timeline.Services.User

+{

+    /// <summary>

+    /// This service provide some basic user features, which should be used internally for other services.

+    /// </summary>

+    public interface IBasicUserService

+    {

+        /// <summary>

+        /// Check if a user exists.

+        /// </summary>

+        /// <param name="id">The id of the user.</param>

+        /// <returns>True if exists. Otherwise false.</returns>

+        Task<bool> CheckUserExistenceAsync(long id);

+

+        /// <summary>

+        /// Get the user id of given username.

+        /// </summary>

+        /// <param name="username">Username of the user.</param>

+        /// <returns>The id of the user.</returns>

+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="username"/> is null.</exception>

+        /// <exception cref="ArgumentException">Thrown when <paramref name="username"/> is of bad format.</exception>

+        /// <exception cref="UserNotExistException">Thrown when the user with given username does not exist.</exception>

+        Task<long> GetUserIdByUsernameAsync(string username);

+

+        /// <summary>

+        /// Get the username modified time of a user.

+        /// </summary>

+        /// <param name="userId">User id.</param>

+        /// <returns>The time.</returns>

+        /// <exception cref="UserNotExistException">Thrown when user does not exist.</exception>

+        Task<DateTime> GetUsernameLastModifiedTimeAsync(long userId);

+    }

+}