export async function store()

in exercises/node-typescript/multi-cmk-complete/src/store.ts [37:62]

• 19 lines of code
• 3 McCabe index (conditional complexity)

export async function store(fileStream: Readable, encryptionContext: EC = {}) {
  /* The encryption context can not step on the Dynamo DB indexing structure. */
  assert(
    !encryptionContext[partition_key] && !encryptionContext[sort_key],
    `Can't use DB key names ${partition_key} or ${sort_key} as Encryption Context keys!`
  );

  const Key = uuid.v4();

  const PointerItem = ddbItem(Key, object_target, encryptionContext);
  const ContextItems = Object.keys(encryptionContext)
    .map(canonicalContextKey)
    .map(canonicalKey => ddbItem(canonicalKey, Key));

  const Body = fileStream.pipe(encryptStream(encryptKeyring));

  const file = await s3
    .upload({ Bucket, Key, Body, Metadata: encryptionContext })
    .promise();

  for (const Item of [PointerItem, ...ContextItems]) {
    await ddb.put({ Item, TableName }).promise();
  }

  return file;
}