Show a header message when current license is a trial

app/helpers/license_helper.rb

@@ -12,39 +12,60 @@ def max_historical_user_count
     HistoricalData.max_historical_user_count
   end
 
-  # in_html is set to false from an initializer, which shouldn't try to render
-  # HTML links.
-  #
-  def license_message(signed_in: signed_in?, is_admin: (current_user && current_user.admin?), in_html: true)
-    @license_message =
-      if License.current
-        yes_license_message(signed_in, is_admin)
-      end
+  def license_message(signed_in: signed_in?, is_admin: (current_user && current_user.admin?))
+    yes_license_message(signed_in, is_admin) if current_license
+  end
+
+  def trial_license_message
+    if signed_in? && current_license&.trial?
+      status = current_license.expired? ? :expired : :active
+
+      message =
+        if current_user.admin?
+          buy_now_link = link_to('Buy now!', '#')
+
+          if status == :active
+            remaining_days = (current_license.expires_at - Date.today).to_i
+
+            "Your GitLab Enterprise Edition trial license remains #{pluralize(remaining_days, 'day')}. #{buy_now_link}".html_safe
+          else
+            "Your GitLab Enterprise Edition trial license expired. #{buy_now_link}".html_safe
+          end
+        elsif status == :expired
+          "Your GitLab Enterprise Edition trial license expired. Please contact your administrator."
+        end
+    end
+
+    message
   end
 
   private
 
-  def yes_license_message(signed_in, is_admin)
-    license = License.current
+  def current_license
+    return @current_license if defined?(@current_license)
 
-    return unless signed_in
+    @current_license = License.current
+  end
 
-    return unless (is_admin && license.notify_admins?) || license.notify_users?
+  def yes_license_message(signed_in, is_admin)
+    return if current_license.trial?
+    return unless signed_in
+    return unless (is_admin && current_license.notify_admins?) || current_license.notify_users?
 
     message = []
 
     message << 'The GitLab Enterprise Edition license'
-    message << (license.expired? ? 'expired' : 'will expire')
-    message << "on #{license.expires_at}."
+    message << (current_license.expired? ? 'expired' : 'will expire')
+    message << "on #{current_license.expires_at}."
 
-    if license.expired? && license.will_block_changes?
+    if current_license.expired? && current_license.will_block_changes?
       message << 'Pushing code and creation of issues and merge requests'
 
       message <<
-        if license.block_changes?
+        if current_license.block_changes?
           'has been disabled.'
         else
-          "will be disabled on #{license.block_changes_at}."
+          "will be disabled on #{current_license.block_changes_at}."
         end
 
       message <<
@@ -55,7 +76,7 @@ def yes_license_message(signed_in, is_admin)
         end
 
       message << 'to'
-      message << (license.block_changes? ? 'restore' : 'ensure uninterrupted')
+      message << (current_license.block_changes? ? 'restore' : 'ensure uninterrupted')
       message << 'service.'
     end
 

app/views/layouts/header/_default.html.haml

@@ -2,6 +2,8 @@
   .navbar-border
   %a.sr-only.gl-accessibility{ href: "#content-body", tabindex: "1" } Skip to content
   .container-fluid
+    - if trial_license_message.present?
+      %p.text-center= trial_license_message
     .header-content
       .dropdown.global-dropdown
         %button.global-dropdown-toggle{ type: 'button', 'data-toggle' => 'dropdown' }