Function buildCanonicalIndex

apps/sim/lib/workflows/subblocks/visibility.ts:98–125

(subBlocks: SubBlockConfig[])

 * Build canonical group indices for a block's subblocks.
 */
export function buildCanonicalIndex(subBlocks: SubBlockConfig[]): CanonicalIndex {
  const groupsById: Record<string, CanonicalGroup> = {}
  const canonicalIdBySubBlockId: Record<string, string> = {}

  subBlocks.forEach((subBlock) => {
    if (!subBlock.canonicalParamId) return
    const canonicalId = subBlock.canonicalParamId
    if (!groupsById[canonicalId]) {
      groupsById[canonicalId] = { canonicalId, advancedIds: [] }
    }
    const group = groupsById[canonicalId]
    if (subBlock.mode === 'advanced' || subBlock.mode === 'trigger-advanced') {
      // Deduplicate: trigger spreads may repeat the same advanced ID as the regular block
      if (!group.advancedIds.includes(subBlock.id)) {
        group.advancedIds.push(subBlock.id)
      }
    } else {
      // A trigger-mode subblock must not overwrite a basicId already claimed by a non-trigger subblock.
      // Blocks spread their trigger's subBlocks after their own, so the regular subblock always wins.
      if (!group.basicId || subBlock.mode !== 'trigger') {
        group.basicId = subBlock.id
      }
    }
    canonicalIdBySubBlockId[subBlock.id] = canonicalId
  })

  return { groupsById, canonicalIdBySubBlockId }
}

/**
 * Resolve if a canonical group is a swap pair (basic + advanced).