first release of SSO package and more examples

_examples/mvc/websocket-sso/user.go

@@ -0,0 +1,33 @@
+//go:build go1.18
+
+package main
+
+type AccessRole uint16
+
+func (r AccessRole) Is(v AccessRole) bool {
+	return r&v != 0
+}
+
+func (r AccessRole) Allow(v AccessRole) bool {
+	return r&v >= v
+}
+
+const (
+	InvalidAccessRole AccessRole = 1 << iota
+	Read
+	Write
+	Delete
+
+	Owner  = Read | Write | Delete
+	Member = Read | Write
+)
+
+type User struct {
+	ID    string     `json:"id"`
+	Email string     `json:"email"`
+	Role  AccessRole `json:"role"`
+}
+
+func (u User) GetID() string {
+	return u.ID
+}