/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.up = function(knex) {
  return knex.schema
    .createTable('scheduledSubscriptions', table => {
      table.string('name').primary();
      table.timestamp('next').defaultTo(knex.fn.now());
    })
    .createTable('subscriptions', table => {
      table.string('key')
        .references('name').inTable('scheduledSubscriptions');
      table.string('channel');
      table.string('guild').nullable();
    });
};

/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.down = function(knex) {
  return knex.schema
    .dropTable('scheduledSubscriptions')
    .dropTable('subscriptions');
};