Function clonePathForUpdate

packages/db/src/query/live/collection-config-builder.ts:2273–2297

(
  target: T,
  path: Array<string>,
)

}

function clonePathForUpdate<T extends Record<string, any>>(
  target: T,
  path: Array<string>,
): T {
  const root = { ...target }
  let sourceCursor: any = target
  let cloneCursor: any = root

  for (let i = 0; i < path.length - 1; i++) {
    const segment = path[i]!
    const sourceValue = sourceCursor?.[segment]
    if (sourceValue == null || typeof sourceValue !== `object`) {
      return root
    }

    const clonedValue = Array.isArray(sourceValue)
      ? [...sourceValue]
      : { ...sourceValue }
    cloneCursor[segment] = clonedValue
    sourceCursor = sourceValue
    cloneCursor = clonedValue
  }

  return root
}

function accumulateChanges<T>(
  acc: Map<unknown, Changes<T>>,