carget/src/app/API-fetch/currency.js

optimization js code for carget website

// API курсы валют

async function fetchCurrencyRates() {
  try {
    const storedData = localStorage.getItem('currencyRates')
    if (!storedData) {
      const responseCNY = await fetch('https://open.er-api.com/v6/latest/CNY')
      const dataCNY = await responseCNY.json()
      const responseUSD = await fetch('https://open.er-api.com/v6/latest/USD')
      const dataUSD = await responseUSD.json()
      const rates = { CNY: dataCNY.rates.RUB, USD: dataUSD.rates.RUB }
      await saveCurrencyRatesToLocalStorage(rates)
    } else {
      const currencyRates = JSON.parse(storedData)
      const lastUpdated = new Date(currencyRates.lastUpdated)
      const currentDate = new Date()
      const currentDateString = `${currentDate.getDate()}-${
        currentDate.getMonth() + 1
      }-${currentDate.getFullYear()}`
      const lastUpdatedString = `${lastUpdated.getDate()}-${
        lastUpdated.getMonth() + 1
      }-${lastUpdated.getFullYear()}`

      if (currentDateString !== lastUpdatedString) {
        const responseCNY = await fetch('https://open.er-api.com/v6/latest/CNY')
        const dataCNY = await responseCNY.json()
        const responseUSD = await fetch('https://open.er-api.com/v6/latest/USD')
        const dataUSD = await responseUSD.json()
        const rates = { CNY: dataCNY.rates.RUB, USD: dataUSD.rates.RUB }

        await saveCurrencyRatesToLocalStorage(rates)
      }
    }
  } catch (error) {
    console.error('Ошибка при загрузке курсов валют:', error)
    throw error // Обработка ошибки
  }
}
async function saveCurrencyRatesToLocalStorage(data) {
  const currentDate = new Date().toISOString() // Получить текущую дату и время
  const currencyRates = { rates: data, lastUpdated: currentDate }
  await localStorage.setItem('currencyRates', JSON.stringify(currencyRates))
  return data
}

function convertCarState(carState) {
  const storedData = localStorage.getItem('currencyRates')
  const currencyRates = JSON.parse(storedData)

  const usdToRubExchangeRate = currencyRates.rates.USD
  const cnyToRubExchangeRate = currencyRates.rates.CNY
  console.log('carrensy', usdToRubExchangeRate, cnyToRubExchangeRate)
  // Конвертация МОДЕЛЕЙ в рубли
  const priceInRub = {}
  modelNames.forEach((modelName) => {
    const modelPrice = carState.models.find((model) => model[modelName])
    const modelPriceCNY = modelPrice ? modelPrice[modelName].price : 0
    priceInRub[modelName] = modelPriceCNY * cnyToRubExchangeRate
  })

  // Обновление объекта состояния с новыми значениями в рублях
  const updatedCarState = {
    ...carState,
    models: carState.models.map((model) => {
      const modelName = Object.keys(model)[0]
      const priceInRub = model[modelName].price * cnyToRubExchangeRate
      return { [modelName]: priceInRub }
    }),
    delivery: {
      ...carState.delivery,
      fromTurgartToBishkek:
        carState.delivery.fromTurgartToBishkek * usdToRubExchangeRate,
      customs: carState.delivery.customs * usdToRubExchangeRate,
      otherExpenses: carState.delivery.otherExpenses * usdToRubExchangeRate,
      fromBishkekToRussia:
        carState.delivery.fromBishkekToRussia * usdToRubExchangeRate,
    },
    labFees: carState.labFees,
    recyclingFee: carState.recyclingFee,
    carLocalization: carState.carLocalization,
  }

  return updatedCarState
}

function sumCarModelsPrices(carState) {
  // Получение всех цен из объекта состояния БЕЗ ДОП ОПЦИЙ
  const {
    models,
    delivery: {
      fromTurgartToBishkek,
      customs,
      otherExpenses,
      fromBishkekToRussia,
    },
    labFees,
    recyclingFee,
    carLocalization,
    marga,
  } = carState

  // Суммирование всех цен
  const totalPrices = modelNames.map((modelName) => {
    const modelPriceCNY =
      models.find((model) => model[modelName])?.[modelName] || 0

    const total =
      modelPriceCNY +
      fromTurgartToBishkek +
      customs +
      otherExpenses +
      fromBishkekToRussia +
      labFees +
      recyclingFee +
      carLocalization

    const totalWithMarga = total + total * (marga / 100)

    return roundNumberToNChars(totalWithMarga, 4)
  })

  return totalPrices
}

function sumCarPrices(carState, myPriceModels) {
  // Получение всех цен из объекта состояния БЕЗ ДОП ОПЦИЙ
  const {
    options: { color, wheels, interiorColor, runningBoards },
  } = carState
  const selectedModel = carState.model[1]
  const modelIndex = modelNames.indexOf(selectedModel)

  // Добавим консольные логи для отслеживания

  // Проверим, что modelIndex не равен -1
  if (modelIndex === -1) {
    console.error('Выбранная модель не найдена в modelNames.')
    return // Возвращаем undefined в случае ошибки
  }

  const modelPrice = myPriceModels[modelIndex]

  let total =
    modelPrice +
    color[0] +
    wheels[0] +
    interiorColor[0] /* - saleAll если нужно делать вычет */

  if (carState.options.runningBoards[1]) {
    const options = carState.options.runningBoards[0]
    options.forEach((option) => {
      if (option.show) {
        total += option.price
      }
    })
  }
  totalPrice = total
  return total
}

export { convertCarState, sumCarModelsPrices, sumCarPrices }