/**
 * Adds `dumps.custom_thumbnail_mime`, for thumbnails uploaded by the poster.
 *
 * Idempotent: safe to run against a fresh db (already created from schema.sql
 * with this column) or an existing one that predates it.
 *
 * @module
 */

import type { DatabaseSync } from "node:sqlite";

/** Applies this migration to `db`. */
export function up(db: DatabaseSync): void {
  const dumpCols = db.prepare(`PRAGMA table_info(dumps);`).all() as {
    name: string;
  }[];
  if (!dumpCols.some((c) => c.name === "custom_thumbnail_mime")) {
    db.exec(
      `ALTER TABLE dumps ADD COLUMN custom_thumbnail_mime TEXT;`,
    );
  }
}