[scrobbles] Add json log migration script

vrobbler/apps/scrobbles/management/commands/migrate_page_to_scrobbledpage.py

@@ -1,5 +1,5 @@
 from books.models import Book
-from django.core.management.base import BaseCommand, no_translations
+from django.core.management.base import BaseCommand
 from scrobbles.models import ScrobbledPage
 
 

vrobbler/apps/scrobbles/management/commands/migrate_scrobble_log_to_json.py

@@ -0,0 +1,48 @@
+from django.core.management.base import BaseCommand
+from scrobbles.models import Scrobble
+
+
+class Command(BaseCommand):
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "--commit",
+            action="store_true",
+            help="Actually migrate data",
+        )
+
+    def handle(self, *args, **options):
+        dry_run = True
+        if options["commit"]:
+            dry_run = False
+
+        scrobbles_with_logs = (
+            Scrobble.objects.filter(scrobble_log__isnull=False)
+            .exclude(scrobble_log="")
+            .exclude(scrobble_log="\n")
+        )
+        updated_scrobble_count = 0
+
+        for scrobble in scrobbles_with_logs:
+            if "\n" in scrobble.scrobble_log:
+                lines = scrobble.scrobble_log.split("\n")
+            else:
+                lines = [scrobble.scrobble_log]
+
+            old_data = {}
+            for line_num, line in enumerate(lines):
+                if line_num == 0 or line == "":
+                    continue
+                old_data[str(line_num)] = line
+
+            if old_data:
+                scrobble.scrobble_log = {"legacy_data": old_data}
+                updated_scrobble_count += 1
+
+                if not dry_run:
+                    scrobble.save(update_fields="scrobble_log")
+                else:
+                    print(
+                        f"Scrobble {scrobble} scrobble_log updated to {old_data}"
+                    )
+
+        print(f"Migrated scrobble logs for {updated_scrobble_count} scrobbles")