"""reactions

Revision ID: b8d3c85646c3
Revises: 0b60fdc8c114
Create Date: 2024-12-28 01:14:07.729096

"""
from typing import Sequence, Union
from sqlalchemy.dialects import mysql

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'b8d3c85646c3'
down_revision: Union[str, None] = '0b60fdc8c114'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "reactions",
        sa.Column("msgid", mysql.BIGINT(display_width=20, unsigned=True), sa.ForeignKey("history.msgid", ondelete="CASCADE")),
        sa.Column("user", sa.VARCHAR(64), sa.ForeignKey("users.username", ondelete="CASCADE"), index=True),
        sa.Column("react", sa.VARCHAR(128)),
    )

    op.create_unique_constraint("idx_unique_reactions",
                                "reactions",
                                ["msgid", "user", "react"])


def downgrade() -> None:
    op.drop_constraint("idx_unique_reactions", "reactions", "unique")
    op.drop_table("reactions")