Initial project import

tools/v/vlib/x/sessions/veb_middleware/veb_middleware.v

@@ -0,0 +1,33 @@
+module veb_middleware
+
+import x.sessions
+import veb
+
+// create can be used to add session middleware to your veb app to ensure
+// a valid session always exists. If a valid session exists the session data will
+// be loaded into `session_data`, else a new session id will be generated.
+// You have to pass the Context type as the generic type.
+pub fn create[T, X](mut s sessions.Sessions[T]) veb.MiddlewareOptions[X] {
+	return veb.MiddlewareOptions[X]{
+		handler: fn [mut s] [T, X](mut ctx X) bool {
+			// a session id is retrieved from the client, so it must be considered
+			// untrusted and has to be verified on every request
+			sid, valid := s.validate_session(ctx)
+
+			if !valid {
+				if s.save_uninitialized {
+					// invalid session id, so create a new one
+					s.set_session_id(mut ctx)
+				}
+				return true
+			}
+
+			ctx.CurrentSession.session_id = sid
+			if data := s.store.get(sid, s.max_age) {
+				ctx.CurrentSession.session_data = data
+			}
+
+			return true
+		}
+	}
+}