stats: add monthly playtimes

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## New
 * Render notes as Markdown
 * Require login by default
-* Add stats for dropped purchases
+* Add stats for dropped purchases, monthly playtimes
 
 ## Improved
 * mark refunded purchases red on game overview

games/templates/stats.html

@@ -73,6 +73,19 @@
                 </tr>
             </tbody>
         </table>
+
+        <h1 class="text-5xl text-center my-6">Playtime per month</h1>
+        <table class="responsive-table">
+            <tbody>
+                {% for month in month_playtimes %}
+                <tr>
+                    <td class="px-2 sm:px-4 md:px-6 md:py-2">{{ month.month | date:"F" }}</td>
+                    <td class="px-2 sm:px-4 md:px-6 md:py-2 font-mono">{{ month.playtime }}</td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+
         <h1 class="text-5xl text-center my-6">Purchases</h1>
         <table class="responsive-table">
             <tbody>

games/views.py

@@ -12,8 +12,9 @@ from django.db.models import (
     Q,
     Sum,
     fields,
+    IntegerField,
 )
-from django.db.models.functions import TruncDate
+from django.db.models.functions import TruncDate, ExtractMonth, TruncMonth
 from django.http import (
     HttpRequest,
     HttpResponse,
@@ -443,6 +444,15 @@ def stats(request, year: int = 0):
         )
         .values("id", "name", "total_playtime")
     )
+    month_playtimes = (
+        this_year_sessions.annotate(month=TruncMonth("timestamp_start"))
+        .values("month")
+        .annotate(playtime=Sum("duration_calculated"))
+        .order_by("month")
+    )
+    for month in month_playtimes:
+        month["playtime"] = format_duration(month["playtime"], "%2.0H")
+
     highest_session_average_game = (
         Game.objects.filter(edition__purchase__session__in=this_year_sessions)
         .annotate(
@@ -574,6 +584,7 @@ def stats(request, year: int = 0):
         "last_play_name": last_play_name,
         "last_play_date": last_play_date,
         "title": f"{year} Stats",
+        "month_playtimes": month_playtimes,
     }
 
     request.session["return_path"] = request.path