Function regenerateBlockIds

apps/sim/stores/workflows/utils.ts:449–618

(
  blocks: Record<string, BlockState>,
  edges: Edge[],
  loops: Record<string, Loop>,
  parallels: Record<string, Parallel>,
  subBlockValues: Record<string, Record<string, unknown>>,
  positionOffset: { x: number; y: number },
  existingBlockNames: Record<string, BlockState>,
  uniqueNameFn: (name: string, blocks: Record<string, BlockState>) => string
)

}

export function regenerateBlockIds(
  blocks: Record<string, BlockState>,
  edges: Edge[],
  loops: Record<string, Loop>,
  parallels: Record<string, Parallel>,
  subBlockValues: Record<string, Record<string, unknown>>,
  positionOffset: { x: number; y: number },
  existingBlockNames: Record<string, BlockState>,
  uniqueNameFn: (name: string, blocks: Record<string, BlockState>) => string
): RegeneratedState & { subBlockValues: Record<string, Record<string, unknown>> } {
  const blockIdMap = new Map<string, string>()
  const nameMap = new Map<string, string>()
  const newBlocks: Record<string, BlockState> = {}
  const newSubBlockValues: Record<string, Record<string, unknown>> = {}

  // Track all blocks for name uniqueness (existing + newly processed)
  const allBlocksForNaming = { ...existingBlockNames }

  // First pass: generate new IDs and names for all blocks
  Object.entries(blocks).forEach(([oldId, block]) => {
    const newId = generateId()
    blockIdMap.set(oldId, newId)

    const oldNormalizedName = normalizeName(block.name)
    const nameConflicts = Object.values(allBlocksForNaming).some(
      (existing) => normalizeName(existing.name) === oldNormalizedName
    )
    const newName = nameConflicts ? uniqueNameFn(block.name, allBlocksForNaming) : block.name
    const newNormalizedName = normalizeName(newName)
    nameMap.set(oldNormalizedName, newNormalizedName)

    // Determine position offset based on parent relationship:
    // 1. Parent also being copied: keep exact relative position (parent itself will be offset)
    // 2. Parent exists in existing workflow: use provided offset, but cap large viewport-based
    //    offsets since they don't make sense for relative positions
    // 3. Top-level block (no parent): apply full paste offset
    const hasParentInPasteSet = block.data?.parentId && blocks[block.data.parentId]
    const hasParentInExistingWorkflow =
      block.data?.parentId && existingBlockNames[block.data.parentId]

    let newPosition: Position
    if (hasParentInPasteSet) {
      // Parent also being copied - keep exact relative position
      newPosition = { x: block.position.x, y: block.position.y }
    } else if (hasParentInExistingWorkflow) {
      // Block stays in existing subflow - use provided offset unless it's viewport-based (large)
      const isLargeOffset =
        Math.abs(positionOffset.x) > LARGE_OFFSET_THRESHOLD ||
        Math.abs(positionOffset.y) > LARGE_OFFSET_THRESHOLD
      const effectiveOffset = isLargeOffset ? DEFAULT_DUPLICATE_OFFSET : positionOffset
      newPosition = {
        x: block.position.x + effectiveOffset.x,
        y: block.position.y + effectiveOffset.y,
      }
    } else {
      // Top-level block - apply full paste offset
      newPosition = {
        x: block.position.x + positionOffset.x,