Fix accidental commitfest move

Author: JelteF

pgcommitfest/commitfest/migrations/0018_undo_pg19_final_close.py

@@ -0,0 +1,79 @@
+from django.db import migrations
+
+
+def undo_pg19_final_close(apps, schema_editor):
+    CommitFest = apps.get_model("commitfest", "CommitFest")
+    PatchOnCommitFest = apps.get_model("commitfest", "PatchOnCommitFest")
+    PatchHistory = apps.get_model("commitfest", "PatchHistory")
+
+    STATUS_INPROGRESS = 3
+    STATUS_CLOSED = 4
+    STATUS_MOVED = 5
+
+    try:
+        pg19_final = CommitFest.objects.get(name="PG19-Final")
+    except CommitFest.DoesNotExist:
+        # Not running against a database that has PG19-Final
+        return
+
+    if pg19_final.status != STATUS_CLOSED:
+        return
+
+    # Find patches that were auto-moved by cfbot when the commitfest closed.
+    # These have PatchHistory entries with by_cfbot=True.
+    moved_histories = PatchHistory.objects.filter(
+        by_cfbot=True,
+        what__startswith=f"Moved from CF {pg19_final.name} to CF ",
+    )
+
+    moved_patch_ids = set(moved_histories.values_list("patch_id", flat=True))
+
+    for patch_id in moved_patch_ids:
+        # Get the PatchOnCommitFest in PG19-Final (should be STATUS_MOVED)
+        try:
+            old_poc = PatchOnCommitFest.objects.get(
+                patch_id=patch_id, commitfest=pg19_final
+            )
+        except PatchOnCommitFest.DoesNotExist:
+            continue
+
+        if old_poc.status != STATUS_MOVED:
+            continue
+
+        # Find the new PatchOnCommitFest that was created by the move. The
+        # move preserves the original status, so we can read it from there.
+        new_poc = (
+            PatchOnCommitFest.objects.filter(patch_id=patch_id)
+            .exclude(commitfest=pg19_final)
+            .order_by("-enterdate")
+            .first()
+        )
+
+        if new_poc is None:
+            continue
+
+        # Restore the old poc to its original status
+        old_poc.status = new_poc.status
+        old_poc.leavedate = None
+        old_poc.save()
+
+        # Remove the new poc that was created by the move
+        new_poc.delete()
+
+    # Delete the PatchHistory entries for these moves
+    moved_histories.delete()
+
+    # Reopen the commitfest and fix the end date
+    pg19_final.status = STATUS_INPROGRESS
+    pg19_final.enddate = "2026-04-09"
+    pg19_final.save()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("commitfest", "0017_make_topic_optional"),
+    ]
+
+    operations = [
+        migrations.RunPython(undo_pg19_final_close, migrations.RunPython.noop),
+    ]