Merge pull request #185 from okriuchykhin/global-notifications-SCI-444

Initial code for system notifications [SCI-444]

app/helpers/notifications_helper.rb

@@ -0,0 +1,16 @@
+module NotificationsHelper
+  def create_system_notification(title, message)
+    notification = Notification.new
+    notification.title = title
+    notification.message = message
+    notification.type_of = :system_message
+    notification.transaction do
+      User.where.not(confirmed_at: nil).find_each do |u|
+        UserNotification
+          .new(user: u, notification: notification, checked: false)
+          .save!
+      end
+      notification.save!
+    end
+  end
+end

lib/tasks/notifications.rake

@@ -0,0 +1,10 @@
+namespace :notifications do
+
+  desc 'Creates new system notification for all active users'
+  task :new_release => :environment do
+    include NotificationsHelper
+    puts 'Creation of system notification for all active users with link to release notes'
+    create_system_notification('New release', 'http://scinote.net/docs/release-notes/')
+  end
+
+end