prefill signature

lib/submitters/maybe_assign_default_signature.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module Submitters
+  module MaybeAssignDefaultSignature
+    module_function
+
+    def call(submitter, params, attachments_index)
+      return if params[:t].present? && params[:t] != SubmissionEvents.build_tracking_param(submitter, 'click_email')
+      return if params[:t].blank? && !submitter.submission_events.exists?(event_type: :click_email)
+
+      signature_attachment = find_previous_signature(submitter)
+
+      return if signature_attachment.blank?
+
+      existing_attachment = attachments_index.values.find { |a| a.blob_id == signature_attachment.blob_id }
+
+      return existing_attachment if existing_attachment
+
+      attachment = submitter.attachments_attachments.create!(blob_id: signature_attachment.blob_id)
+
+      attachments_index[attachment.uuid] = attachment
+
+      attachment
+    end
+
+    def find_previous_signature(submitter)
+      return if submitter.email.blank?
+
+      submitters_query =
+        Submitter.where(email: submitter.email)
+                 .where.not(completed_at: nil)
+                 .where(SubmissionEvent.where(Submitter.arel_table[:id].eq(SubmissionEvent.arel_table[:submitter_id]))
+                                       .where(event_type: :click_email).limit(1).arel.exists)
+
+      ActiveStorage::Attachment.where(name: :signature, record: submitters_query).order(:id).last
+    end
+  end
+end