signal-desktop/ts/sql/migrations/90-delete-story-reply-screenshot.ts

// Copyright 2023 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

import type { Database } from '@signalapp/sqlcipher';

import type { LoggerType } from '../../types/Logging.js';
import { sql } from '../util.js';

export default function updateToSchemaVersion90(
  db: Database,
  logger: LoggerType
): void {
  let numChanges = 0;
  const [updateQuery, updateParams] = sql`
      UPDATE messages
      SET json = json_remove(json, '$.storyReplyContext.attachment.screenshotData')
      WHERE isStory = 0

      /* we want to find all messages with a non-null storyId, but using string 
      comparison (instead of a non-null check) here causes Sqlite to use the 
      storyId index */
      AND storyId > '0' 

      AND json->'$.storyReplyContext.attachment.screenshotData' IS NOT NULL;
  `;

  const info = db.prepare(updateQuery).run(updateParams);
  numChanges = info.changes;

  logger.info(
    `removed screenshotData from ${numChanges} ` +
      `message${numChanges > 1 ? 's' : ''}`
  );
}