content.json

[
  {
    "descricao": "PAC",
    "itens": [
      {
        "freteinvalido": true,
        "sku": "2358878.7412.73973",
        "valor": 5
      },
      {
        "freteinvalido": false,
        "sku": "2390933.7658.92431",
        "valor": 5
      },
      {
        "freteinvalido": false,
        "sku": "2390937.51608.280362",
        "valor": 5
      }
    ],
    "prazo": "15 dias úteis"
  },
  {
    "descricao": "SEDEX",
    "itens": [
      {
        "freteinvalido": false,
        "sku": "2358878.7412.73973",
        "valor": 15
      },
      {
        "freteinvalido": false,
        "sku": "2390933.7658.92431",
        "valor": 15
      },
      {
        "freteinvalido": false,
        "sku": "2390937.51608.280362",
        "valor": 15
      }
    ],
    "prazo": "5 dias úteis"
  },
  {
    "descricao": "TRANSPORTADORA TRANSPORTES LTDA",
    "itens": [
      {
        "freteinvalido": false,
        "sku": "2358878.7412.73973",
        "valor": 637.7
      },
      {
        "freteinvalido": true,
        "sku": "2390933.7658.92431",
        "valor": 0
      },
      {
        "freteinvalido": true,
        "sku": "2390937.51608.280362",
        "valor": 0
      }
    ],
    "prazo": "10 dias úteis"
  }
]

index.js

const getGroupValidSKUs = (group) => {
  const isValid = (item) => !item.freteinvalido
  const toSKU = (item) => item.sku
  const SKUs = group.itens.filter(isValid).map(toSKU)
  return SKUs
}

const isValidGroup = (group, groups) => {
  const SKUs = getGroupValidSKUs(group)

  if (!SKUs.length) // Um short-circuit pra eliminar grupos onde
    return false    // nenhum dos items é um frete válido.

  const OSKUs = [].concat(...groups.map(getGroupValidSKUs))

  if (!OSKUs.length) // Outro short-circuit pra eliminar grupos
    return false     // em que não há SKUs válidos pra comparar.

  const isRepeated = SKUs.some((SKU) => OSKUs.includes(SKU))
  return isRepeated
}

const getValidGroups = ([group, ...groups]) => {
  if (!group || !groups.length)
    return []

  const isValid = isValidGroup(group, groups)
  if (isValid)
    return [ group, ...getValidGroups(groups) ]
  return getValidGroups(groups)
}

export default getValidGroups