Add 302 redirect to latest vn of submission pdf for Google Scholar

preprints/urls.py

@@ -6,10 +6,15 @@ from django.conf.urls import url
 
 from . import views
 
-from submissions.constants import SCIPOST_PREPRINT_W_VN_REGEX
+from submissions.constants import SUBMISSIONS_NO_VN_REGEX, SUBMISSIONS_COMPLETE_REGEX
 
 app_name = 'preprints'
 
 urlpatterns = [
-    url(r'^{regex}/$'.format(regex=SCIPOST_PREPRINT_W_VN_REGEX), views.preprint_pdf, name='pdf'),
+    url(r'^{regex}/$'.format(regex=SUBMISSIONS_NO_VN_REGEX),
+        views.preprint_latest_pdf,
+        name='latest_pdf'),
+    url(r'^{regex}/$'.format(regex=SUBMISSIONS_COMPLETE_REGEX),
+        views.preprint_pdf,
+        name='pdf'),
 ]

preprints/views.py

@@ -5,6 +5,7 @@ import os
 
 from django.http import Http404, HttpResponse
 from django.shortcuts import get_object_or_404, redirect
+from django.urls import reverse
 
 from submissions.helpers import check_verified_author
 from submissions.models import Submission
@@ -39,3 +40,12 @@ def preprint_pdf(request, identifier_w_vn_nr):
         filename = '{}{}'.format(preprint.identifier_w_vn_nr, extension)
         response['Content-Disposition'] = ('filename=' + filename)
     return response
+
+
+def preprint_latest_pdf(request, identifier_wo_vn_nr):
+    submission = Submission.objects.filter(
+        preprint__identifier_wo_vn_nr=identifier_wo_vn_nr).first()
+    if not submission:
+        raise Http404
+    return redirect(reverse('preprints:pdf',
+                            args=[submission.get_latest_version().preprint.identifier_w_vn_nr,]))

submissions/constants.py

@@ -277,7 +277,6 @@ scipost_regex_wo_vn = 'scipost_[0-9]{4,}_[0-9]{4,}'
 scipost_regex_w_vn = 'scipost_[0-9]{4,}_[0-9]{4,}v[0-9]{1,2}'
 SUBMISSIONS_NO_VN_REGEX = '(?P<identifier_wo_vn_nr>(%s|%s))' % (arxiv_regex_wo_vn, scipost_regex_wo_vn)
 SUBMISSIONS_COMPLETE_REGEX = '(?P<identifier_w_vn_nr>(%s|%s))' % (arxiv_regex_w_vn, scipost_regex_w_vn)
-SCIPOST_PREPRINT_W_VN_REGEX = '(?P<identifier_w_vn_nr>%s)' % scipost_regex_w_vn
 
 
 # `EXPLICIT_REGEX_MANUSCRIPT_CONSTRAINTS` tracks the regex rules for the manuscripts