fix: Revert "Email authors" link for an RFC to the draft that it came from

ietf/doc/tests.py

@@ -1,4 +1,4 @@
-# Copyright The IETF Trust 2012-2023, All Rights Reserved
+# Copyright The IETF Trust 2012-2024, All Rights Reserved
 # -*- coding: utf-8 -*-
 
 
@@ -1513,6 +1513,25 @@ def test_draft_group_link(self):
             self.assertEqual(r.status_code, 200)
             self.assert_correct_non_wg_group_link(r, group)
 
+    def test_document_email_authors_button(self):
+        # rfc not from draft
+        rfc = WgRfcFactory()
+        DocEventFactory.create(doc=rfc, type='published_rfc')
+        url = urlreverse("ietf.doc.views_doc.document_main", kwargs=dict(name=rfc.name))
+        r = self.client.get(url)
+        self.assertEqual(r.status_code, 200)
+        q = PyQuery(r.content)
+        self.assertEqual(len(q('a:contains("Email authors")')), 0, 'Did not expect "Email authors" button')
+
+        # rfc from draft
+        draft = WgDraftFactory(group=rfc.group)
+        draft.relateddocument_set.create(relationship_id="became_rfc", target=rfc)
+        draft.set_state(State.objects.get(used=True, type="draft", slug="rfc"))
+        r = self.client.get(url)
+        self.assertEqual(r.status_code, 200)
+        q = PyQuery(r.content)
+        self.assertEqual(len(q('a:contains("Email authors")')), 1, 'Expected "Email authors" button')
+
     def test_document_primary_and_history_views(self):
         IndividualDraftFactory(name='draft-imaginary-independent-submission')
         ConflictReviewFactory(name='conflict-review-imaginary-irtf-submission')

ietf/doc/views_doc.py

@@ -324,6 +324,9 @@ def document_main(request, name, rev=None, document_html=False):
                 submission = group.acronym
             submission = '<a href="%s">%s</a>' % (group.about_url(), submission)
 
+        draft = doc.came_from_draft()
+        mailto_name = draft.name if draft else None
+
         return render(request, "doc/document_rfc.html" if document_html is False else "doc/document_html.html",
                                   dict(doc=doc,
                                        document_html=document_html,
@@ -356,7 +359,8 @@ def document_main(request, name, rev=None, document_html=False):
                                        iana_experts_comment=iana_experts_comment,
                                        presentations=presentations,
                                        diff_revisions=diff_revisions,
-                                       submission=submission
+                                       submission=submission,
+                                       mailto_name=mailto_name,
                                        ))
 
     elif doc.type_id == "draft":

ietf/templates/doc/document_rfc.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{# Copyright The IETF Trust 2016-2023, All Rights Reserved #}
+{# Copyright The IETF Trust 2016-2024, All Rights Reserved #}
 {% load origin %}
 {% load static %}
 {% load ietf_filters %}
@@ -81,12 +81,14 @@
             {% endif %}
         </table>
         <div class="buttonlist">
-            <a class="btn btn-primary btn-sm"
-               href="mailto:{{ doc.name }}@ietf.org?subject=Mail%20regarding%20{{ doc.name }}">
-                <i class="bi bi-envelope">
-                </i>
-                Email authors
-            </a>
+            {% if mailto_name %}
+                <a class="btn btn-primary btn-sm"
+                   href="mailto:{{ mailto_name }}@ietf.org?subject=Mail%20regarding%20{{ doc.name }}">
+                    <i class="bi bi-envelope">
+                    </i>
+                    Email authors
+                </a>
+            {% endif %}
             {% if doc.group.type_id == "wg" or doc.group.type_id == "rg" %}
                 <a class="btn btn-primary btn-sm"
                    href="mailto:{{ doc.group.list_email }}?subject=Mail%20regarding%20{{ doc.name }}">