From a4a75188bd17e31b39a02511bbd6d628bab5c909 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 25 Apr 2021 21:20:04 +0800
Subject: ...

---
 BackEnd/Timeline/Services/BasicUserService.cs | 95 ---------------------------
 1 file changed, 95 deletions(-)
 delete mode 100644 BackEnd/Timeline/Services/BasicUserService.cs

(limited to 'BackEnd/Timeline/Services/BasicUserService.cs')

diff --git a/BackEnd/Timeline/Services/BasicUserService.cs b/BackEnd/Timeline/Services/BasicUserService.cs
deleted file mode 100644
index de0829ee..00000000
--- a/BackEnd/Timeline/Services/BasicUserService.cs
+++ /dev/null
@@ -1,95 +0,0 @@
-using Microsoft.EntityFrameworkCore;
-using System;
-using System.Linq;
-using System.Threading.Tasks;
-using Timeline.Entities;
-using Timeline.Models.Validation;
-using Timeline.Services.Exceptions;
-
-namespace Timeline.Services
-{
-    /// <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> CheckUserExistence(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> GetUserIdByUsername(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> GetUsernameLastModifiedTime(long userId);
-    }
-
-    public class BasicUserService : IBasicUserService
-    {
-        private readonly DatabaseContext _database;
-
-        private readonly UsernameValidator _usernameValidator = new UsernameValidator();
-
-        public BasicUserService(DatabaseContext database)
-        {
-            _database = database;
-        }
-
-        public async Task<bool> CheckUserExistence(long id)
-        {
-            return await _database.Users.AnyAsync(u => u.Id == id);
-        }
-
-        public async Task<long> GetUserIdByUsername(string username)
-        {
-            if (username == null)
-                throw new ArgumentNullException(nameof(username));
-
-            if (!_usernameValidator.Validate(username, out var message))
-                throw new ArgumentException(message);
-
-            var entity = await _database.Users.Where(user => user.Username == username).Select(u => new { u.Id }).SingleOrDefaultAsync();
-
-            if (entity == null)
-                throw new UserNotExistException(username);
-
-            return entity.Id;
-        }
-
-        public async Task<DateTime> GetUsernameLastModifiedTime(long userId)
-        {
-            var entity = await _database.Users.Where(u => u.Id == userId).Select(u => new { u.UsernameChangeTime }).SingleOrDefaultAsync();
-
-            if (entity is null)
-                throw new UserNotExistException(userId);
-
-            return entity.UsernameChangeTime;
-        }
-    }
-
-    public static class BasicUserServiceExtensions
-    {
-        public static async Task ThrowIfUserNotExist(this IBasicUserService service, long userId)
-        {
-            if (!await service.CheckUserExistence(userId))
-            {
-                throw new UserNotExistException(userId);
-            }
-        }
-    }
-}
-- 
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