add recipient preferences

app/controllers/api/templates_controller.rb

@@ -97,7 +97,7 @@ module Api
         :name,
         :external_id,
         {
-          submitters: [%i[name uuid]],
+          submitters: [%i[name uuid is_requester linked_to_uuid email]],
           fields: [[:uuid, :submitter_uuid, :name, :type,
                     :required, :readonly, :default_value,
                     :title, :description,

app/controllers/templates_controller.rb

@@ -103,7 +103,7 @@ class TemplatesController < ApplicationController
     params.require(:template).permit(
       :name,
       { schema: [%i[attachment_uuid name]],
-        submitters: [%i[name uuid]],
+        submitters: [%i[name uuid is_requester linked_to_uuid email]],
         fields: [[:uuid, :submitter_uuid, :name, :type,
                   :required, :readonly, :default_value,
                   :title, :description,

app/controllers/templates_recipients_controller.rb

@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+class TemplatesRecipientsController < ApplicationController
+  load_and_authorize_resource :template
+
+  def create
+    authorize!(:update, @template)
+
+    @template.submitters =
+      submitters_params.map { |s| s.reject { |_, v| v.is_a?(String) && v.blank? } }
+
+    @template.save!
+
+    render json: { submitters: @template.submitters }
+  end
+
+  private
+
+  def submitters_params
+    params.require(:template).permit(
+      submitters: [%i[name uuid is_requester linked_to_uuid email option]]
+    ).fetch(:submitters, {}).values.filter_map do |s|
+      next if s[:uuid].blank?
+
+      if s[:is_requester] == '1'
+        s[:is_requester] = true
+      else
+        s.delete(:is_requester)
+      end
+
+      option = s.delete(:option)
+
+      if option.present?
+        case option
+        when 'is_requester'
+          s[:is_requester] = true
+        when 'not_set'
+          s.delete(:is_requester)
+          s.delete(:email)
+          s.delete(:linked_to_uuid)
+        when /\Alinked_to_(.*)\z/
+          s[:linked_to_uuid] = ::Regexp.last_match(-1)
+        end
+      end
+
+      s
+    end
+  end
+end