"""add messages.bcc_addr

The Sent copy of an outgoing message includes a Bcc header (standard client
behavior) so the sender keeps a record of blind recipients; store it structured
alongside to/cc for display.

Revision ID: 0007
Revises: 0006
Create Date: 2026-07-18
"""

from __future__ import annotations

from collections.abc import Sequence

from alembic import op

revision: str = "0007"
down_revision: str | None = "0006"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.execute("ALTER TABLE messages ADD COLUMN bcc_addr jsonb NOT NULL DEFAULT '[]'")


def downgrade() -> None:
    op.execute("ALTER TABLE messages DROP COLUMN IF EXISTS bcc_addr")