Add option to download a published authors CSV from the console (#2279)

This adds another download option on top of what was introduced in #2270
. It gives the option to download all of the published author objects
and related data.

I've included all the base `PublishedAuthor` fields and have linked to a
couple of other relevant fields (`user_id`, `project_id`, etc.). I'm
happy to add / remove fields as desired.

physionet-django/console/templates/console/downloads.html

@@ -29,6 +29,14 @@ <h6>Published projects</h6>
         </a>
       </div>
 
+      <div class="mb-4">
+        <h6>Published authors</h6>
+        <p>Download a complete list of published authors, including their names, email addresses, and affiliations.</p>
+        <a href="{% url 'download_published_authors' %}" class="btn btn-primary">
+          Download published authors
+        </a>
+      </div>
+
     </div>
   </div>
 </div>

physionet-django/console/urls.py

@@ -108,6 +108,7 @@
     path('downloads/', views.downloads, name='downloads'),
     path('download/users/', views.download_users, name='download_users'),
     path('download/projects/', views.download_projects, name='download_projects'),
+    path('download/published_authors/', views.download_published_authors, name='download_published_authors'),
 
     # redirects
     path('redirects/', views.view_redirects, name='redirects'),

physionet-django/console/views.py

@@ -49,6 +49,7 @@
     EditLog,
     License,
     Publication,
+    PublishedAuthor,
     PublishedProject,
     Reference,
     StorageRequest,
@@ -2542,6 +2543,57 @@ def clean_html(html_content):
     return response
 
 
+@console_permission_required('user.change_credentialapplication')
+def download_published_authors(request):
+    """
+    Delivers a CSV file containing data on published authors.
+    """
+    authors = PublishedAuthor.objects.all()
+    response = StreamingHttpResponse(
+        (csv.writer(Echo(), quoting=csv.QUOTE_ALL).writerow(row) for row in get_published_authors(authors)),
+        content_type='text/csv'
+    )
+
+    response['Content-Disposition'] = 'attachment; filename="published_authors.csv"'
+    return response
+
+
+def get_published_authors(authors):
+    """
+    Generates published author data for download
+    """
+    csv_header = ["published_author_id",
+                  "project_id",
+                  "user_id",
+                  "first_names",
+                  "last_name",
+                  "corresponding_email",
+                  "all_emails",
+                  "affiliations",
+                  "approval_datetime",
+                  "is_corresponding",
+                  "is_submitting",
+                  "display_order"
+                  ]
+    yield csv_header
+
+    for author in authors:
+
+        yield [author.id,
+               author.project.id,
+               author.user.id,
+               author.first_names,
+               author.last_name,
+               author.corresponding_email,
+               ', '.join(author.user.get_emails()),
+               '; '.join([a.name for a in author.affiliations.all()]),
+               author.approval_datetime,
+               author.is_corresponding,
+               author.is_submitting,
+               author.display_order
+               ]
+
+
 @console_permission_required('project.can_view_access_logs')
 def download_credentialed_users(request):
     """