ui: only show register button when permission allowed (#679)

packages/ui-default/templates/partials/login_dialog.html

@@ -4,7 +4,9 @@
       <div class="dialog--signin__side">
         <h1>{{ _("Don't have an account?") }}</h1>
         <p>{{ _('By signing up a {0} universal account, you can submit code and join discussions in all online judging services provided by us.').format((handler.domain|default({ui:[]})).ui.name|default(model.system.get('server.name'))) }}</p>
+        {% if handler.user.hasPriv(PRIV.PRIV_REGISTER_USER) %}
         <div><a href="{{ url('user_register') }}" class="inverse rounded button">{{ _('Sign Up Now') }}</a></div>
+        {% endif %}
       </div>
     </div>
     <div class="dialog--signin__main">

packages/ui-default/templates/partials/nav.html

@@ -19,7 +19,9 @@
     <ol class="nav__list nav__list--secondary clearfix">
     {% if not handler.user.hasPriv(PRIV.PRIV_USER_PROFILE) %}
       <li class="nav__list-item"><a href="{{ url('user_login') }}" class="nav__item" name="nav_login">{{ _('Login') }}</a></li>
+      {% if handler.user.hasPriv(PRIV.PRIV_REGISTER_USER) %}
       <li class="nav__list-item"><a href="{{ url('user_register') }}" class="nav__item--round">{{ _('Sign Up') }}</a></li>
+      {% endif %}
       <li class="nav__list-item nojs--hide" data-dropdown-pos="bottom right" data-dropdown-custom-class="nav__dropdown" data-dropdown-target="#menu-nav-user" data-dropdown-disabledconstrainToWindow data-dropdown-trigger-desktop-only>
         <a href="javascript:;" class="nav__item">
           <span class="icon icon-global"></span>Language <span class="icon icon-expand_more"></span>