Extract enum values as an array from a table's column

import { column, defineDb, defineTable, NOW } from "astro:db";

/** @returns Table definition with common columns. */
function createTable(columns: ColumnsConfig) {
    return defineTable({
        columns: {
            id: column.number({ primaryKey: true }),
            createdAt: column.date({ default: NOW }),
            updatedAt: column.date({
                default: NOW,
                optional: true,
                onUpdate: NOW // @todo Investigate if it works, no type-safety so far.
            }),
            ...columns
        }
    });
}

export const Notification = createTable({
    userId: column.number({ references: () => User.columns.id }),
    message: column.text(),
    variant: column.text({
        optional: true,
        enum: [
            "primary",
            "secondary",
            "error",
            "success",
            "info"
        ]
    }),
    link: column.text({ optional: true }),
    fixed: column.boolean({ optional: true }),
    readAt: column.date({ optional: true })
});