Fix duration change being unknown (fixes #89)

shynet/dashboard/templatetags/helpers.py

@@ -1,3 +1,4 @@
+from datetime import timedelta
 from urllib.parse import urlparse
 
 import flag
@@ -61,7 +62,6 @@ def relative_stat_tone(
 
 @register.simple_tag
 def percent_change_display(start, end):
-    try:
     if start == None or end == None:
         return SafeString("Δ n/a")
     if start == end:
@@ -81,8 +81,6 @@ def percent_change_display(start, end):
             pct_change = str(change) + "%"
 
     return SafeString(direction + pct_change)
-    except: # TODO: filter for specific issues
-        return SafeString("Δ ?")
 
 
 @register.inclusion_tag("dashboard/includes/sidebar_footer.html")
@@ -100,6 +98,12 @@ def compare(
     bad_classes=None,
     neutral_classes=None,
 ):
+    if isinstance(start, timedelta):
+        start = start.seconds
+    
+    if isinstance(end, timedelta):
+        end = end.seconds
+
     return {
         "start": start,
         "end": end,