Method serializeBlock

apps/sim/serializer/index.ts:195–310

(
    block: BlockState,
    options: {
      validateRequired: boolean
      allBlocks: Record<string, BlockState>
    }
  )

  }

  private serializeBlock(
    block: BlockState,
    options: {
      validateRequired: boolean
      allBlocks: Record<string, BlockState>
    }
  ): SerializedBlock {
    // Special handling for subflow blocks (loops, parallels, etc.)
    if (block.type === 'loop' || block.type === 'parallel') {
      return {
        id: block.id,
        position: block.position,
        config: {
          tool: '', // Loop blocks don't have tools
          params: (block.data || {}) as Record<string, unknown>, // Preserve the block data (parallelType, count, etc.)
        },
        inputs: {},
        outputs: block.outputs,
        metadata: {
          id: block.type,
          name: block.name,
          description: block.type === 'loop' ? 'Loop container' : 'Parallel container',
          category: 'subflow',
          color: block.type === 'loop' ? '#3b82f6' : '#8b5cf6',
        },
        enabled: block.enabled,
      }
    }

    const blockConfig = getBlock(block.type)
    if (!blockConfig) {
      throw new Error(`Invalid block type: ${block.type}`)
    }

    // Extract parameters from UI state
    const params = extractBlockParams(block)

    const isTriggerCategory = blockConfig.category === 'triggers'
    if (block.triggerMode === true || isTriggerCategory) {
      params.triggerMode = true
    }
    if (block.advancedMode === true) {
      params.advancedMode = true
    }

    // Validate required fields that only users can provide (before execution starts)
    if (options.validateRequired) {
      const { missingRequiredFields } = collectBlockFieldIssues(block, blockConfig, params)
      if (missingRequiredFields.length > 0) {
        const blockName = block.name || blockConfig.name || 'Block'
        throw new Error(
          `${blockName} is missing required fields: ${missingRequiredFields.join(', ')}`
        )
      }
    }

    let toolId = ''