Function getBlocksByParent

apps/sim/lib/workflows/autolayout/utils.ts:473–494

(blocks: Record<string, BlockState>)

 * Groups blocks by their parent container
 */
export function getBlocksByParent(blocks: Record<string, BlockState>): {
  root: string[]
  children: Map<string, string[]>
} {
  const root: string[] = []
  const children = new Map<string, string[]>()

  for (const [id, block] of Object.entries(blocks)) {
    const parentId = block.data?.parentId

    if (!parentId) {
      root.push(id)
    } else {
      if (!children.has(parentId)) {
        children.set(parentId, [])
      }
      children.get(parentId)!.push(id)
    }
  }

  return { root, children }
}

/**
 * Normalizes node positions to start from a given padding offset.