Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/mailers/application_mailer.rb

@@ -0,0 +1,84 @@
+class ApplicationMailer < ActionMailer::Base
+  include ActionView::Helpers::SanitizeHelper
+
+  default from: ENV.fetch('MAILER_SENDER_EMAIL', 'Chatwoot <accounts@chatwoot.com>')
+  before_action { ensure_current_account(params.try(:[], :account)) }
+  around_action :switch_locale
+  layout 'mailer/base'
+  # Fetch template from Database if available
+  # Order: Account Specific > Installation Specific > Fallback to file
+  prepend_view_path ::EmailTemplate.resolver
+  append_view_path Rails.root.join('app/views/mailers')
+  helper :frontend_urls
+  helper do
+    def global_config
+      @global_config ||= GlobalConfig.get('BRAND_NAME', 'BRAND_URL')
+    end
+  end
+
+  rescue_from(*ExceptionList::SMTP_EXCEPTIONS, with: :handle_smtp_exceptions)
+
+  def smtp_config_set_or_development?
+    ENV.fetch('SMTP_ADDRESS', nil).present? || Rails.env.development?
+  end
+
+  private
+
+  def handle_smtp_exceptions(message)
+    Rails.logger.warn 'Failed to send Email'
+    Rails.logger.error "Exception: #{message}"
+  end
+
+  def send_mail_with_liquid(*args)
+    Rails.logger.info "Email sent to #{args[0][:to]} with subject #{args[0][:subject]}"
+    mail(*args) do |format|
+      # explored sending a multipart email containing both text type and html
+      # parsing the html with nokogiri will remove the links as well
+      # might also remove tags like b,li etc. so lets rethink about this later
+      # format.text { Nokogiri::HTML(render(layout: false)).text }
+      format.html { render }
+    end
+  end
+
+  def liquid_droppables
+    # Merge additional objects into this in your mailer
+    # liquid template handler converts these objects into drop objects
+    {
+      account: Current.account,
+      user: @agent,
+      conversation: @conversation,
+      inbox: @conversation&.inbox
+    }
+  end
+
+  def liquid_locals
+    # expose variables you want to be exposed in liquid
+    locals = {
+      global_config: GlobalConfig.get('BRAND_NAME', 'BRAND_URL'),
+      action_url: @action_url
+    }
+
+    locals.merge({ attachment_url: @attachment_url }) if @attachment_url
+    locals.merge({ failed_contacts: @failed_contacts, imported_contacts: @imported_contacts })
+    locals
+  end
+
+  def locale_from_account(account)
+    return unless account
+
+    I18n.available_locales.map(&:to_s).include?(account.locale) ? account.locale : nil
+  end
+
+  def ensure_current_account(account)
+    Current.reset
+    Current.account = account if account.present?
+  end
+
+  def switch_locale(&)
+    locale ||= locale_from_account(Current.account)
+    locale ||= I18n.default_locale
+    # ensure locale won't bleed into other requests
+    # https://guides.rubyonrails.org/i18n.html#managing-the-locale-across-requests
+    I18n.with_locale(locale, &)
+  end
+end