Add directive for public register message on login.

This removes conditional logic on template linking
process and innecesary scope mutation on login directive.
Also, it has less data bindings, because the new directive
do all work at compile time without adding additional
bindings.

app/coffee/modules/auth.coffee

@@ -145,6 +145,31 @@ module.service("$tgAuth", AuthService)
 ## Login Directive
 #############################################################################
 
+# Directive that manages the visualization of public register
+# message/link on login page.
+
+PublicRegisterMessageDirective = ($config) ->
+    template = _.template("""
+    <p class="login-text">
+        <span>Not registered yet?</span>
+        <a href="<%= url %>" tg-nav="register" title="Register"> create your free account here</a>
+    </p>""")
+
+    templateFn = ->
+        url = $config.get("publicRegisterEnabled")
+        if not url
+            return ""
+        return template({url:url})
+
+    return {
+        restrict: "AE"
+        scope: {}
+        template: templateFn
+    }
+
+
+module.directive("tgPublicRegisterMessage", ["$tgConfig", PublicRegisterMessageDirective])
+
 LoginDirective = ($auth, $confirm, $location, $config, $routeParams, $navUrls) ->
     link = ($scope, $el, $attrs) ->
         $scope.pubblicRegisterEnabled = $config.get("pubblicRegisterEnabled")

app/partials/views/modules/login-form.jade

@@ -13,6 +13,4 @@ div.login-form-container(tg-login)
             a.button.button-login.button-gray(href="", ng-click="ctrl.submit()", title="Sign in") Sign in
             input(type="submit", style="display:none")
 
-    p.login-text(ng-if="pubblicRegisterEnabled")
+    tg-public-register-message
-        span Not registered yet?
-        a(href="", tg-nav="register", title="Register")  create your free account here