feat: Report email with LIT authorization path

app/mailers/report_mailer.rb

@@ -5,6 +5,13 @@ class ReportMailer < ApplicationMailer
 
   def report_content
     @reported_content = params.fetch(:reported_content)
+    study_group = @reported_content.submission.study_group
+    exercise = @reported_content.exercise
+
+    # NOTE: This implementation assumes the course URL is static and does not vary per user.
+    # This is currently valid for a majority of use cases. However, in dynamic scenarios (such as
+    # content trees in openHPI used in conjunction with A/B/n testing) this assumption may no longer hold true.
+    @course_url = LtiParameter.find_by(study_group:, exercise:)&.lti_parameters&.[]('launch_presentation_return_url')
 
     mail(subject: I18n.t('report_mailer.report_content.subject', content_name: @reported_content.model_name.human))
   end

app/views/report_mailer/report_content.html.slim

@@ -2,3 +2,5 @@ h3 = t('.prolog')
 blockquote style="white-space: pre-wrap;" = @reported_content.question
 p = t('.take_action')
 p = link_to(request_for_comment_url(@reported_content), request_for_comment_url(@reported_content))
+- if @course_url.present?
+  p = link_to(t('.authentication'), @course_url)

app/views/report_mailer/report_content.text.slim

@@ -5,3 +5,8 @@
 == t('.take_action')
 == "\n\n"
 == request_for_comment_url(@reported_content)
+== "\n\n"
+- if @course_url.present?
+  == t('.authentication')
+  == "\n\n"
+  == @course_url

config/locales/de/report.yml

@@ -2,6 +2,7 @@
 de:
   report_mailer:
     report_content:
+      authentication: Kurs-URL für die LTI-Authentifizierung.
       prolog: 'Die folgenden Inhalte wurden als unangemessen gemeldet:'
       subject: 'Spam Report: Ein %{content_name} in CodeOcean wurde als unangemessen markiert.'
       take_action: Bitte ergreifen Sie gegebenenfalls Maßnahmen.

config/locales/en/report.yml

@@ -2,6 +2,7 @@
 en:
   report_mailer:
     report_content:
+      authentication: Course URL for LTI authentication.
       prolog: 'The following content has been reported as inappropriate:'
       subject: 'Spam Report: A %{content_name} on CodeOcean has been marked as inappropriate.'
       take_action: Please take action if required.

spec/mailers/report_mailer_spec.rb

@@ -22,6 +22,15 @@
         expect(mail.text_part.body).to include(question)
         expect(mail.html_part.body).to include(question)
       end
+
+      it 'includes the LTI retrun URL for course authentication' do
+        create(:lti_parameter,
+          exercise: reported_content.exercise,
+          study_group: reported_content.submission.study_group)
+
+        expect(mail.text_part.body).to match(%r{https.+/courses/})
+        expect(mail.html_part.body).to match(%r{https.+/courses/})
+      end
     end
   end
 end