add html escape replace variable option

app/views/submitter_mailer/_custom_content.html.erb

@@ -1 +1 @@
-<%= auto_link(simple_format(h(local_assigns[:content]))) %>
+<%= auto_link(simple_format(h(ReplaceEmailVariables.call(local_assigns[:content], submitter: local_assigns[:submitter], sig: local_assigns[:sig])))) %>

app/views/submitter_mailer/completed_email.html.erb

@@ -1,5 +1,5 @@
 <% if @email_config %>
-  <%= render 'custom_content', content: ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter) %>
+  <%= render 'custom_content', content: @email_config.value['body'], submitter: @submitter %>
 <% else %>
   <p>Hi there,</p>
   <p>"<%= @submitter.submission.template.name %>" form has been completed by <%= @submitter.submission.submitters.order(:completed_at).map { |e| e.name || e.email || e.phone }.join(', ') %>.</p>

app/views/submitter_mailer/documents_copy_email.html.erb

@@ -1,5 +1,5 @@
 <% if @email_config %>
-  <%= render 'custom_content', content: ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter, sig: @sig) %>
+  <%= render 'custom_content', content: @email_config.value['body'], submitter: @submitter, sig: @sig %>
 <% else %>
   <p>Hi there,</p>
   <p>Please check the copy of your "<%= @submitter.submission.template.name %>" submission in the email attachments.</p>

app/views/submitter_mailer/invitation_email.html.erb

@@ -1,6 +1,6 @@
 <% if @email_config || @body.present? %>
   <% body = (@body.presence || @email_config.value['body']).to_s %>
-  <%= render 'custom_content', content: ReplaceEmailVariables.call(body, submitter: @submitter) %>
+  <%= render 'custom_content', content: body, submitter: @submitter %>
   <% if !body.include?(ReplaceEmailVariables::SUBMITTER_LINK) && !body.include?(ReplaceEmailVariables::SUBMITTER_ID) && !body.include?(ReplaceEmailVariables::SUBMISSION_LINK) && !body.include?(ReplaceEmailVariables::TEMPLATE_ID) && !@submitter.submission.source.in?(%w[api embed]) %>
     <p><%= link_to nil, submit_form_url(slug: @submitter.slug, t: SubmissionEvents.build_tracking_param(@submitter, 'click_email')) %></p>
   <% end %>

lib/replace_email_variables.rb

@@ -20,25 +20,25 @@ module ReplaceEmailVariables
   module_function
 
   # rubocop:disable Metrics
-  def call(text, submitter:, tracking_event_type: 'click_email', sig: nil)
-    text = text.gsub(TEMPLATE_NAME) { submitter.template.name }
-    text = text.gsub(TEMPLATE_ID) { submitter.template.id }
-    text = text.gsub(SUBMITTER_ID) { submitter.id }
-    text = text.gsub(SUBMITTER_SLUG) { submitter.slug }
-    text = text.gsub(SUBMISSION_ID) { submitter.submission.id }
-    text = text.gsub(SUBMITTER_EMAIL) { submitter.email }
-    text = text.gsub(SUBMITTER_NAME) { submitter.name || submitter.email || submitter.phone }
-    text = text.gsub(SUBMITTER_LINK) { build_submitter_link(submitter, tracking_event_type) }
-    text = text.gsub(SUBMISSION_LINK) do
+  def call(text, submitter:, tracking_event_type: 'click_email', html_escape: false, sig: nil)
+    text = replace(text, TEMPLATE_NAME, html_escape:) { submitter.template.name }
+    text = replace(text, TEMPLATE_ID, html_escape:) { submitter.template.id }
+    text = replace(text, SUBMITTER_ID, html_escape:) { submitter.id }
+    text = replace(text, SUBMITTER_SLUG, html_escape:) { submitter.slug }
+    text = replace(text, SUBMISSION_ID, html_escape:) { submitter.submission.id }
+    text = replace(text, SUBMITTER_EMAIL, html_escape:) { submitter.email }
+    text = replace(text, SUBMITTER_NAME, html_escape:) { submitter.name || submitter.email || submitter.phone }
+    text = replace(text, SUBMITTER_LINK, html_escape:) { build_submitter_link(submitter, tracking_event_type) }
+    text = replace(text, SUBMISSION_LINK, html_escape:) do
       submitter.submission ? build_submission_link(submitter.submission) : ''
     end
-    text = text.gsub(SUBMISSION_SUBMITTERS) { build_submission_submitters(submitter.submission) }
-    text = text.gsub(DOCUMENTS_LINKS) { build_documents_links_text(submitter, sig) }
-    text = text.gsub(DOCUMENTS_LINK) { build_documents_links_text(submitter, sig) }
-    text = text.gsub(ACCOUNT_NAME) { submitter.submission.account.name }
-    text = text.gsub(SENDER_NAME) { submitter.submission.created_by_user&.full_name }
+    text = replace(text, SUBMISSION_SUBMITTERS, html_escape:) { build_submission_submitters(submitter.submission) }
+    text = replace(text, DOCUMENTS_LINKS, html_escape:) { build_documents_links_text(submitter, sig) }
+    text = replace(text, DOCUMENTS_LINK, html_escape:) { build_documents_links_text(submitter, sig) }
+    text = replace(text, ACCOUNT_NAME, html_escape:) { submitter.submission.account.name }
+    text = replace(text, SENDER_NAME, html_escape:) { submitter.submission.created_by_user&.full_name }
 
-    text.gsub(SENDER_EMAIL) { submitter.submission.created_by_user&.email.to_s.sub(/\+\w+@/, '@') }
+    replace(text, SENDER_EMAIL, html_escape:) { submitter.submission.created_by_user&.email.to_s.sub(/\+\w+@/, '@') }
   end
   # rubocop:enable Metrics
 
@@ -48,6 +48,16 @@ module ReplaceEmailVariables
     )
   end
 
+  def replace(text, var, html_escape: false)
+    text.gsub(var) do
+      if html_escape
+        ERB::Util.html_escape(yield)
+      else
+        yield
+      end
+    end
+  end
+
   def build_submitter_link(submitter, tracking_event_type)
     if tracking_event_type == 'click_email'
       Rails.application.routes.url_helpers.submit_form_url(