[widgets] Add date filtering to widgets

vrobbler/apps/scrobbles/views.py

@@ -911,10 +911,28 @@ class BaseEmbeddableWidget(TemplateView):
         return user, profile
 
     def get_date_range(self, user):
-        now = timezone.now()
-        if user.is_authenticated:
-            now = now_user_timezone(user.profile)
-        now = now.date()
+        date_param = self.request.GET.get("date")
+
+        if date_param:
+            try:
+                if "W" in date_param and date_param[4] == "-":
+                    parsed_date = datetime.strptime(date_param, "%Y-W%W").date()
+                elif "-" in date_param and len(date_param) > 4:
+                    parsed_date = datetime.strptime(date_param, "%Y-%m-%d").date()
+                else:
+                    parsed_date = datetime.strptime(date_param, "%Y").date()
+            except ValueError:
+                parsed_date = None
+
+            if parsed_date:
+                now = parsed_date
+            else:
+                now = timezone.now().date()
+        else:
+            now = timezone.now()
+            if user.is_authenticated:
+                now = now_user_timezone(user.profile)
+            now = now.date()
 
         period = self.kwargs.get("period", "week")
         if period == "month":
@@ -925,7 +943,7 @@ class BaseEmbeddableWidget(TemplateView):
             label = now.strftime("%Y")
         else:
             start = now - timedelta(days=now.isoweekday() % 7)
-            label = "This Week"
+            label = f"Week {now.isocalendar()[1]}"
 
         return start, label