1 files changed, 107 insertions, 0 deletions
diff --git a/Libs/VNLib.Plugins.Essentials.Sessions/MemorySession.cs b/Libs/VNLib.Plugins.Essentials.Sessions/MemorySession.cs
new file mode 100644
index 0000000..35e2fea
--- /dev/null
+++ b/Libs/VNLib.Plugins.Essentials.Sessions/MemorySession.cs
@@ -0,0 +1,107 @@
+using System;
+using System.Net;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+
+using VNLib.Net.Http;
+using VNLib.Plugins.Essentials.Extensions;
+
+using static VNLib.Plugins.Essentials.Sessions.ISessionExtensions;
+
+#nullable enable
+
+namespace VNLib.Plugins.Essentials.Sessions.Memory
+{
+    internal class MemorySession : SessionBase
+    {
+        private readonly Dictionary<string, string> DataStorage;
+
+        private readonly MemorySessionStore SessionStore;
+
+        public MemorySession(IPAddress ipAddress, MemorySessionStore SessionStore)
+        {
+            //Set the initial is-new flag
+            DataStorage = new Dictionary<string, string>(10);
+            this.SessionStore = SessionStore;
+            //Get new session id
+            SessionID = SessionStore.NewSessionID;
+            UserIP = ipAddress;
+            SessionType = SessionType.Web;
+            Created = DateTimeOffset.UtcNow;
+            //Init 
+            IsNew = true;
+        }
+        //Store in memory directly
+        public override IPAddress UserIP { get; protected set; }
+
+        //Session type has no backing store, so safe to hard-code it's always web
+
+        public override SessionType SessionType => SessionType.Web;
+
+        protected override ValueTask<Task?> UpdateResource(bool isAsync, IHttpEvent state)
+        {
+            //if invalid is set, invalide the current session
+            if (Flags.IsSet(INVALID_MSK))
+            {
+                //Clear storage, and regenerate the sessionid
+                DataStorage.Clear();
+                RegenId(state);
+                //Reset ip-address
+                UserIP = state.Server.GetTrustedIp();
+                //Update created-time
+                Created = DateTimeOffset.UtcNow;
+                //Re-initialize the session to the state of the current connection
+                this.InitNewSession(state.Server);
+                //Modified flag doesnt matter since there is no write-back
+               
+            }
+            else if (Flags.IsSet(REGEN_ID_MSK))
+            {
+                //Regen id without modifying the data store
+                RegenId(state);
+            }
+            //Clear flags
+            Flags.ClearAll();
+            //Memory session always completes 
+            return ValueTask.FromResult<Task?>(null);
+        }
+
+        private void RegenId(IHttpEvent entity)
+        {
+            //Get a new session-id
+            string newId = SessionStore.NewSessionID;
+            //Update the cache entry
+            SessionStore.UpdateRecord(newId, this);
+            //store new sessionid
+            SessionID = newId;
+            //set cookie
+            SessionStore.SetSessionCookie(entity, this);
+        }       
+
+        protected override Task OnEvictedAsync()
+        {
+            //Clear all session data
+            DataStorage.Clear();
+            return Task.CompletedTask;
+        }
+
+        protected override string IndexerGet(string key)
+        {
+            return DataStorage.GetValueOrDefault(key, string.Empty);
+        }
+
+        protected override void IndexerSet(string key, string value)
+        {
+            //Check for special keys
+            switch (key)
+            {
+                //For tokens/login hashes, we can set the upgrade flag
+                case TOKEN_ENTRY:
+                case LOGIN_TOKEN_ENTRY:
+                    Flags.Set(REGEN_ID_MSK);
+                    break;
+            }
+            DataStorage[key] = value;
+        }
+    }
+}