"""Add note preview font preference

Revision ID: 4a5b2c7d9e3f
Revises: 275ef106dc91
Create Date: 2024-07-18 13:30:00.000000

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '4a5b2c7d9e3f'
down_revision = '275ef106dc91'
branch_labels = None
depends_on = None


def upgrade():
    # Add note_preview_font column to user_preferences table
    with op.batch_alter_table('user_preferences', schema=None) as batch_op:
        batch_op.add_column(sa.Column('note_preview_font', sa.String(length=50), nullable=True))
    
    # Set default value for existing rows
    op.execute("UPDATE user_preferences SET note_preview_font = 'system' WHERE note_preview_font IS NULL")


def downgrade():
    # Remove note_preview_font column from user_preferences table
    with op.batch_alter_table('user_preferences', schema=None) as batch_op:
        batch_op.drop_column('note_preview_font')