"""add avatar url for chats

Revision ID: 0021_chat_avatar_url
Revises: 0020_attachment_waveform_data
Create Date: 2026-03-08
"""

from collections.abc import Sequence

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = "0021_chat_avatar_url"
down_revision: str | None = "0020_attachment_waveform_data"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.add_column("chats", sa.Column("avatar_url", sa.String(length=512), nullable=True))


def downgrade() -> None:
    op.drop_column("chats", "avatar_url")