Add heartbeat frequency setting

shynet/analytics/templates/analytics/scripts/page.js

@@ -23,6 +23,6 @@ window.onload = function () {
       );
     } catch {}
   }
-  setInterval(sendUpdate, 5000);
+  setInterval(sendUpdate, Number("{{heartbeat_frequency}}"));
   sendUpdate();
 };

shynet/analytics/views/ingress.py

@@ -82,10 +82,15 @@ class ScriptView(View):
                 },
             )
         )
+        heartbeat_frequency = settings.SCRIPT_HEARTBEAT_FREQUENCY
         return render(
             self.request,
             "analytics/scripts/page.js",
-            context={"endpoint": endpoint, "protocol": protocol},
+            context={
+                "endpoint": endpoint,
+                "protocol": protocol,
+                "heartbeat_frequency": heartbeat_frequency,
+            },
             content_type="application/javascript",
         )
 

shynet/shynet/settings.py

@@ -256,3 +256,7 @@ ONLY_SUPERUSERS_CREATE = os.getenv("ONLY_SUPERUSERS_CREATE", "True") == "True"
 # Should the script use HTTPS to send the POST requests? The hostname is from
 # the django SITE default. (Edit it using the admin panel.)
 SCRIPT_USE_HTTPS = os.getenv("SCRIPT_USE_HTTPS", "True") == "True"
+
+# How frequently should the tracking script "phone home" with a heartbeat, in
+# milliseconds?
+SCRIPT_HEARTBEAT_FREQUENCY = int(os.getenv("SCRIPT_HEARTBEAT_FREQUENCY", "5000"))