Function newPostman

store/postman.go:23–25

(user *userDB, friend *friendDB, group *groupDB, notice *util.Notice)

)

func newPostman(user *userDB, friend *friendDB, group *groupDB, notice *util.Notice) *postman {
	return &postman{user: user, friend: friend, group: group, notice: notice}
}

// check 检查发件人是否有权发送这个消息.
func (p *postman) check(msg *meta.Message) error {