[scrobbles] Add timezones to scrobbles for better representation

vrobbler/apps/scrobbles/migrations/0052_scrobble_timezone.py

@@ -0,0 +1,46 @@
+# Generated by Django 4.2.11 on 2024-04-19 13:10
+
+from datetime import datetime
+
+import pytz
+from django.conf import settings
+from django.db import migrations, models
+
+
+def set_default_timezone(apps, schema_editor):
+    Scrobble = apps.get_model("scrobbles", "Scrobble")
+    for s in Scrobble.objects.all():
+        if not s.timezone:
+            s.timezone = settings.TIME_ZONE
+
+            if s.user and s.user.profile:
+                s.timezone = s.user.profile.timezone
+
+            # A shim to adjust for our change to European time for 3 months
+            if (
+                datetime(2023, 10, 15).replace(
+                    tzinfo=pytz.timezone("Europe/Paris")
+                )
+                <= s.timestamp
+                <= datetime(2023, 12, 15).replace(
+                    tzinfo=pytz.timezone("Europe/Paris")
+                )
+            ):
+                s.timezone = "Europe/Paris"
+            s.save(update_fields=["timezone"])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("scrobbles", "0051_alter_scrobble_scrobble_log"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="scrobble",
+            name="timezone",
+            field=models.CharField(blank=True, max_length=50, null=True),
+        ),
+        migrations.RunPython(set_default_timezone),
+    ]