/**
 * Adds `dumps.custom_thumbnail_mime`, so a poster can upload a thumbnail that
 * replaces the fetched one. It holds the uploaded image's type, and NULL means
 * the dump has none.
 *
 * @module
 */

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

/**
 * Run once by `runMigrations`. Existing dumps keep their fetched thumbnails,
 * and a database made from schema.sql already has the column.
 */
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;`,
    );
  }
}