init push - laying out the project

portal/app/mailers/user_mailer.rb

@@ -0,0 +1,21 @@
+class UserMailer < ApplicationMailer
+  def welcome_email user
+    @user = user
+    subject = I18n.t('welcome_email_subject')
+    deliver_mail(user.email, subject, reply_to = nil, user.fullname)
+  end
+
+  def notify_token_purchase(user, tokens, amount, balance)
+    @user = user
+    subject = I18n.t('token_purchase_confirmation_subject')
+    @body = I18n.t('token_purchase_confirmation_body', tokens: tokens, amount: amount, balance: balance.to_i)
+    deliver_mail(user.email, subject, reply_to = nil, user.fullname)
+  end
+
+  def notify_hourly_unread_activities(user_id, activities_hash)
+    @user = User.find_by(id: user_id)
+    @activities_hash = activities_hash
+
+    deliver_mail(@user.email, '[Helpbuild] Activity Digest Mail', reply_to = nil, @user.fullname)
+  end
+end