Function parseOptionalJsonInput

apps/sim/blocks/utils.ts:444–463

(value: unknown, label: string)

 * Returns `undefined` for empty values and throws a helpful error for invalid JSON strings.
 */
export function parseOptionalJsonInput<T = unknown>(value: unknown, label: string): T | undefined {
  if (value === undefined || value === null || value === '') {
    return undefined
  }

  if (typeof value === 'string') {
    const trimmed = value.trim()
    if (trimmed.length === 0) {
      return undefined
    }

    try {
      return JSON.parse(trimmed) as T
    } catch (error) {
      throw new Error(`Invalid JSON for ${label}: ${toError(error).message}`)
    }
  }

  return value as T
}

/**
 * Parses an optional numeric block input value.