Add prior cases information to collection case view template

atlas/templates/atlas/collection_case_view_take.html

@@ -71,8 +71,15 @@
         </div>
     {% endif %}
     {% if show_history %}
-        <div>
-            History: {{casedetail.get_history_pre|linebreaks}}
+        <div class="d-flex justify-content-between align-items-start">
+            <div>
+                History: {{casedetail.get_history_pre|linebreaks}}
+            </div>
+            {% if has_priors %}
+                <div class="ms-2">
+                    <span title="This case has priors available for comparison" class="badge bg-info text-dark small">Priors{% if prior_count %} ({{ prior_count }}){% endif %}</span>
+                </div>
+            {% endif %}
 
         </div>
     {% endif %}

atlas/views.py

@@ -3842,6 +3842,10 @@ def collection_case_view_take(
             case _:
                 continue
 
+    # Determine whether any prior series will be shown to the candidate.
+    has_priors = any(prior_flag for (_, prior_flag, _) in series_to_load)
+    prior_count = prior_cases.count()
+
     return render(
         request,
         "atlas/collection_case_view_take.html",
@@ -3852,6 +3856,8 @@ def collection_case_view_take(
             "casedetail": casedetail,
             "series_list": series_list,
             "series_to_load": series_to_load,
+            "has_priors": has_priors,
+            "prior_count": prior_count,
             "case_number": case_number,
             "previous": previous,
             "next": next,