"""channels.subscriber_count

Revision ID: 0008_channel_subscriber_count
Revises: 0007_drop_access_expiry
Create Date: 2026-09-17

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "0008_channel_subscriber_count"
down_revision: Union[str, None] = "0007_drop_access_expiry"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Subscriber count comes from YouTube channels.list (statistics part);
    # hidden counts stay NULL.
    op.add_column("channels", sa.Column("subscriber_count", sa.BigInteger(), nullable=True))


def downgrade() -> None:
    op.drop_column("channels", "subscriber_count")