refactor, sketch SSE implementation

handlers/session.go

@@ -0,0 +1,26 @@
+package handlers
+
+import (
+	"fmt"
+
+	"github.com/labstack/echo/v4"
+)
+
+type User struct {
+	Id uint
+}
+
+func GetUser(c echo.Context) (User, error) {
+	session, err := store.Get(c.Request(), "session")
+	if err == nil {
+		val, ok := session.Values["user_id"]
+		if ok {
+			return User{Id: val.(uint)}, nil
+		} else {
+			return User{}, fmt.Errorf("user_id not in session")
+		}
+	} else {
+		return User{}, fmt.Errorf("couldn't retureve session from store")
+	}
+
+}