Refactoring - split data, logic and model layers; custom network exception

2023-05-12 12:13:11 +02:00
parent 81109f3d6c
commit ee0b063eec
48 changed files with 256 additions and 160 deletions
--- a/StudentHouseDashboard/Data/UserRepository.cs
+++ b/StudentHouseDashboard/Data/UserRepository.cs
@@ -0,0 +1,142 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Data.SqlClient;
+using Models;
+using System.Data;
+using System.Xml.Linq;
+
+namespace Data
+{
+    public class UserRepository
+    {
+        public UserRepository() { }
+        public List<User> GetAllUsers()
+        {
+            var users = new List<User>();
+
+            using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
+            {
+                string sql = "SELECT * FROM Users;";
+                SqlCommand cmd = new SqlCommand(sql, conn);
+                var reader = cmd.ExecuteReader();
+
+                while (reader.Read())
+                {
+                    // ID, Name, Password, Role
+                    users.Add(new User(Convert.ToInt32(reader["ID"]),
+                        reader["Name"].ToString(),
+                        reader["Password"].ToString(),
+                        (UserRole)reader["Role"])
+                        );
+                }
+
+            }
+            return users;
+        }
+        public User GetUserById(int id)
+        {
+            using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
+            {
+                string sql = "SELECT * FROM Users WHERE ID = @id;";
+                SqlCommand cmd = new SqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@id", id);
+                var reader = cmd.ExecuteReader();
+
+                reader.Read();
+
+                // ID, Name, Password, Role
+                return new User(Convert.ToInt32(reader["ID"]),
+                        reader["Name"].ToString(),
+                        reader["Password"].ToString(),
+                        (UserRole)reader["Role"]);
+            }
+        }
+        public List<User> GetUsersByPage(int? p, int? c)
+        {
+            List<User> users = new List<User>();
+            if (c == null || c < 0)
+            {
+                c = 10;
+            }
+            if (p == null || p < 0)
+            {
+                p = 0;
+            }
+            using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
+            {
+                string sql = "SELECT * FROM Users ORDER BY ID OFFSET @start ROWS FETCH NEXT @count ROWS ONLY;";
+                SqlCommand sqlCommand = new SqlCommand(sql, conn);
+                sqlCommand.Parameters.AddWithValue("@start", p * c);
+                sqlCommand.Parameters.AddWithValue("@count", c);
+                var reader = sqlCommand.ExecuteReader();
+                while (reader.Read())
+                {
+                    users.Add(new User(Convert.ToInt32(reader["ID"]), reader["Name"].ToString(),
+                        reader["Password"].ToString(), (UserRole)reader["Role"]));
+                }
+
+            }
+            return users;
+        }
+        public bool CreateUser(string name, string password, UserRole role)
+        {
+            using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
+            {
+                string sql = "INSERT INTO Users (Name, Password, Role) VALUES (@name, @pass, @role);";
+                SqlCommand cmd = new SqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@name", name);
+                cmd.Parameters.AddWithValue("@pass", password);
+                cmd.Parameters.AddWithValue("@role", (int)role);
+                int writer = cmd.ExecuteNonQuery();
+
+                if (writer == 1)
+                {
+                    return true;
+                }
+                else return false;
+            }
+        }
+        public bool UpdateUser(int id, string name, string password, UserRole role)
+        {
+            using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
+            {
+                string sql = "UPDATE Users " +
+                    "SET Name = @name, Password = @pass, Role = @role " +
+                    "WHERE ID = @id;";
+                SqlCommand cmd = new SqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@name", name);
+                cmd.Parameters.AddWithValue("@pass", password);
+                cmd.Parameters.AddWithValue("@role", (int)role);
+                cmd.Parameters.AddWithValue("@id", id);
+                int writer = cmd.ExecuteNonQuery();
+
+                if (writer == 1)
+                {
+                    return true;
+                }
+                else return false;
+            }
+        }
+        public bool DisableUser(int id)
+        {
+            using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
+            {
+                string sql = "UPDATE Users " +
+                    "SET Name = 'Deleted User @id', Password = '0'" +
+                    "WHERE ID = @id;";
+                SqlCommand cmd = new SqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@id", id);
+                int writer = cmd.ExecuteNonQuery();
+
+                if (writer == 1)
+                {
+                    return true;
+                }
+                else return false;
+            }
+        }
+    }
+}