Feature: Twilio SMS Channel (#658)

Twilio SMS Channel
Fixes :  #350

app/builders/contact_builder.rb

@@ -0,0 +1,37 @@
+class ContactBuilder
+  pattr_initialize [:source_id!, :inbox!, :contact_attributes!]
+
+  def perform
+    contact_inbox = inbox.contact_inboxes.find_by(source_id: source_id)
+    return contact_inbox if contact_inbox
+
+    build_contact
+  end
+
+  private
+
+  def account
+    @account ||= inbox.account
+  end
+
+  def build_contact
+    ActiveRecord::Base.transaction do
+      contact = account.contacts.create!(
+        name: contact_attributes[:name],
+        phone_number: contact_attributes[:phone_number],
+        email: contact_attributes[:email],
+        identifier: contact_attributes[:identifier],
+        additional_attributes: contact_attributes[:identifier]
+      )
+      contact_inbox = ::ContactInbox.create!(
+        contact_id: contact.id,
+        inbox_id: inbox.id,
+        source_id: source_id
+      )
+      ::ContactAvatarJob.perform_later(contact, contact_attributes[:avatar_url]) if contact_attributes[:avatar_url]
+      contact_inbox
+    rescue StandardError => e
+      Rails.logger e
+    end
+  end
+end