feat: use issue_number as a reference for a weekly ProTip (vas3k#999)

Co-authored-by: Oskar Sharipov <oskaratwork[at]riseup.net>

Author: igoose1

misc/models.py

@@ -24,6 +24,7 @@ def save(self, *args, **kwargs):
         return super().save(*args, **kwargs)
 
     @classmethod
-    def random_tip(cls):
-        return cls.objects.filter(is_visible=True).order_by("?").first()
-
+    def weekly_tip(cls, seed: int):
+        tips = cls.objects.filter(is_visible=True)
+        number = seed % tips.count()
+        return tips[number]

notifications/digests.py

@@ -227,7 +227,7 @@ def generate_weekly_digest(no_footer=False):
     issue_number = (end_date - settings.LAUNCH_DATE).days // 7
 
     # Pro tips
-    pro_tip = ProTip.random_tip()
+    pro_tip = ProTip.weekly_tip(issue_number)
 
     og_params = urlencode({
         **settings.OG_IMAGE_GENERATOR_DEFAULTS,