add 2 years before caves to recent page

core/views/caves.py

@@ -272,6 +272,13 @@ def caves_recent(request):
             caves_previous_year.append(c)
     caves_previous_year.sort(key=caveKey)  
     
+    caves_previous2_year = []
+    for c in allcaves:
+        previous_year = str(int(current_expo()) - 3)
+        if c.unofficial_number.startswith(previous_year):
+            caves_previous2_year.append(c)
+    caves_previous2_year.sort(key=caveKey) 
+    
     return render(
         request,
         "caveindex.html",
@@ -283,6 +290,7 @@ def caves_recent(request):
         "caves_this_year": caves_this_year,
         "caves_last_year": caves_last_year,
         "caves_previous_year": caves_previous_year,
+        "caves_previous2_year": caves_previous2_year,
         "cavepage": True, "year": current_expo()},
     )
 

templates/caveindex.html

@@ -52,6 +52,13 @@ See <em><a href="/caves_undropped">Undropped Caves</a></em> for all unexplored c
 	{% include 'cavelist_columns.html' %}
 {% endfor %}
 </div>
+
+<h3>The year before's caves</h3>
+<div style="column-count: 3;-moz-column-count: 3">
+{% for cave in caves_previous2_year %}
+	{% include 'cavelist_columns.html' %}
+{% endfor %}
+</div>
 <p>
 See <em><a href="/caves">All Caves</a></em> for all the caves in areas 1623, 1626, 1624, 1627