Initial commit

C#/WebApplication/Repositorys/SessionRepository.cs

@@ -0,0 +1,54 @@
+using System;
+using MySqlConnector;
+using WebApplication.Modules;
+using WebApplication.Repositorys.Interfaces;
+
+namespace WebApplication.Repositorys {
+    public class SessionRepository : ISessionRepository {
+        public SessionRepository() {
+            MySQL.Insert("DELETE FROM Sessions");
+        }
+        
+        public Session CreateSession(string customer) {
+            Session session = new Session {Guid = GetFreeId(), CustomerId = customer, CreationDate = DateTime.Now};
+            MySQL.Insert($"INSERT INTO Sessions VALUES (\"{session.Guid}\", \"{session.CustomerId}\", \"{session.CreationDate}\")");
+            return session;
+        }
+
+        public void RemoveSession(Session session) {
+            MySQL.Insert($"DELETE FROM Sessions WHERE Guid = \"{session.Guid}\"");
+        }
+
+        public Session GetSession(string id) {
+            MySqlDataReader reader = MySQL.GetData($"SELECT * FROM Sessions WHERE Guid = \"{id}\"");
+            if (reader.Read()) {
+                Session session = new Session {Guid = id};
+                session.CustomerId = reader.GetString("CustomerId");
+                session.CreationDate = DateTime.Parse(reader.GetString("CreationDate"));
+                reader.Close();
+                return session;
+            }
+            reader.Close();
+            return null;
+        }
+
+        public bool ValidateSession(Session session, string customerToAccess) {
+            if (session == null) return false;
+            if (session.CustomerId != customerToAccess) return false;
+            TimeSpan span = DateTime.Now - session.CreationDate;
+            bool valid = span.Minutes <= 30;
+            if (!valid) RemoveSession(session);
+            return valid;
+        }
+
+        private string GetFreeId() {
+            string guid = Guid.NewGuid().ToString();
+            while (true) {
+                if (GetSession(guid) is not null) guid = Guid.NewGuid().ToString();
+                else break;
+            }
+
+            return guid;
+        }
+    }
+}