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calculate-shipping.js
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calculate-shipping.js
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const logger = require('firebase-functions/logger')
const { calculate } = require('../../../lib/correios-calculate')
exports.post = async ({ appSdk }, req, res) => {
const { params, application } = req.body
const { storeId } = req
// setup basic required response object
const response = {
shipping_services: []
}
// merge all app options configured by merchant
const appData = Object.assign({}, application.data, application.hidden_data)
if (appData.free_shipping_from_value >= 0) {
response.free_shipping_from_value = appData.free_shipping_from_value
}
if (!params.to) {
// just a free shipping preview with no shipping address received
// respond only with free shipping option
res.send(response)
return
}
const cepDestino = params.to ? params.to.zip.replace(/\D/g, '') : ''
const cepOrigem = params.from
? params.from.zip.replace(/\D/g, '')
: appData.zip ? appData.zip.replace(/\D/g, '') : ''
if (!cepOrigem) {
// must have configured origin zip code to continue
return res.status(409).send({
error: 'CALCULATE_ERR',
message: 'Zip code is unset on app hidden data (merchant must configure the app)'
})
}
if (!params.items) {
return res.status(400).send({
error: 'CALCULATE_EMPTY_CART',
message: 'Cannot calculate shipping without cart items'
})
}
const checkZipCode = rule => {
// validate rule zip range
if (cepDestino && rule.zip_range) {
const { min, max } = rule.zip_range
return Boolean((!min || cepDestino >= min) && (!max || cepDestino <= max))
}
return true
}
// search for configured free shipping rule
if (Array.isArray(appData.shipping_rules)) {
for (let i = 0; i < appData.shipping_rules.length; i++) {
const rule = appData.shipping_rules[i]
if (rule.free_shipping && checkZipCode(rule)) {
if (!rule.min_amount) {
response.free_shipping_from_value = 0
break
} else if (!(response.free_shipping_from_value <= rule.min_amount)) {
response.free_shipping_from_value = rule.min_amount
}
}
}
}
// optinal predefined or configured service codes
let serviceCodes
if (params.service_code) {
serviceCodes = [params.service_code]
} else if (appData.services?.[0]?.service_code) {
serviceCodes = appData.services.map((service) => service.service_code)
}
// optional params to Correios services
let vlDeclarado = 0
const servicosAdicionais = []
if (params.subtotal && !appData.no_declare_value) {
vlDeclarado = params.subtotal
}
// https://api.correios.com.br/preco/v1/servicos-adicionais/03220
if (params.own_hand) {
servicosAdicionais.push('002')
}
if (params.receipt) {
servicosAdicionais.push('001')
}
// calculate weight and pkg value from items list
let nextDimensionToSum = 'length'
const pkg = {
dimensions: {
width: {
value: 0,
unit: 'cm'
},
height: {
value: 0,
unit: 'cm'
},
length: {
value: 0,
unit: 'cm'
}
},
weight: {
value: 0,
unit: 'g'
}
}
params.items.forEach(({ price, quantity, dimensions, weight }) => {
if (!params.subtotal && !appData.no_declare_value) {
vlDeclarado += price * quantity
}
// sum physical weight
if (weight && weight.value) {
let weightValue
switch (weight.unit) {
case 'kg':
weightValue = weight.value * 1000
break
case 'g':
weightValue = weight.value
break
case 'mg':
weightValue = weight.value / 1000000
default:
weightValue = weight.value
}
if (weightValue) {
pkg.weight.value += weightValue * quantity
}
}
// sum total items dimensions to calculate cubic weight
if (dimensions) {
for (const side in dimensions) {
const dimension = dimensions[side]
if (dimension && dimension.value) {
let dimensionValue
switch (dimension.unit) {
case 'cm':
dimensionValue = dimension.value
break
case 'm':
dimensionValue = dimension.value * 100
break
case 'mm':
dimensionValue = dimension.value / 10
default:
dimensionValue = dimension.value
}
// add/sum current side to final dimensions object
if (dimensionValue) {
const pkgDimension = pkg.dimensions[side]
if (appData.use_bigger_box === true) {
if (!pkgDimension.value || pkgDimension.value < dimensionValue) {
pkgDimension.value = dimensionValue
}
} else {
for (let i = 0; i < quantity; i++) {
if (!pkgDimension.value) {
pkgDimension.value = dimensionValue
} else if (nextDimensionToSum === side) {
pkgDimension.value += dimensionValue
nextDimensionToSum = nextDimensionToSum === 'length'
? 'width'
: nextDimensionToSum === 'width' ? 'height' : 'length'
} else if (pkgDimension.value < dimensionValue) {
pkgDimension.value = dimensionValue
}
}
}
}
}
}
}
})
let correiosResult
try {
const { data } = await calculate({
correiosParams: {
cepOrigem,
cepDestino,
psObjeto: pkg.weight.value || 500,
comprimento: pkg.dimensions.length.value || 16,
altura: pkg.dimensions.height.value || 2,
largura: pkg.dimensions.width.value || 11,
vlDeclarado,
servicosAdicionais
},
serviceCodes,
storeId
})
correiosResult = data
} catch (err) {
const { response } = err
return res.status(409).send({
error: 'CALCULATE_FAILED',
message: response?.data?.[0]?.txErro || err.message
})
}
correiosResult.forEach(({
coProduto,
// psCobrado
// peAdValorem
pcProduto,
pcTotalServicosAdicionais,
pcFinal,
prazoEntrega,
entregaSabado,
txErro
}) => {
if (txErro) {
logger.warn(`[calculate] alert/error with #${storeId} ${coProduto}`, {
pcFinal,
prazoEntrega,
txErro
})
}
if (!pcFinal || !(prazoEntrega >= 0)) {
return
}
// find respective configured service label
let serviceName
switch (coProduto) {
case '04014':
case '03220':
case '03204':
serviceName = 'SEDEX'
break
case '04510':
case '03298':
serviceName = 'PAC'
}
let label = serviceName || `Correios ${coProduto}`
if (Array.isArray(appData.services)) {
for (let i = 0; i < appData.services.length; i++) {
const service = appData.services[i]
if (service && service.service_code === coProduto && service.label) {
label = service.label
}
}
}
// parse to E-Com Plus shipping line object
const parseMoney = (str) => (Number(str.replace(',', '.') || 0))
const shippingLine = {
from: {
...params.from,
zip: cepOrigem
},
to: params.to,
package: pkg,
price: parseMoney(pcProduto || pcFinal),
declared_value: pcTotalServicosAdicionais ? vlDeclarado : 0,
declared_value_price: pcTotalServicosAdicionais ? parseMoney(pcTotalServicosAdicionais) : 0,
own_hand: Boolean(params.own_hand),
receipt: Boolean(params.receipt),
discount: 0,
total_price: parseMoney(pcFinal),
delivery_time: {
days: Number(prazoEntrega),
working_days: entregaSabado !== 'S'
},
posting_deadline: {
days: 3,
...appData.posting_deadline
},
flags: ['correios-api']
}
// check for default configured additional/discount price
if (typeof appData.additional_price === 'number' && appData.additional_price) {
if (appData.additional_price > 0) {
shippingLine.other_additionals = [{
tag: 'additional_price',
label: 'Adicional padrão',
price: appData.additional_price
}]
} else {
// negative additional price to apply discount
shippingLine.discount -= appData.additional_price
}
// update total price
shippingLine.total_price += appData.additional_price
}
// search for discount by shipping rule
if (Array.isArray(appData.shipping_rules)) {
for (let i = 0; i < appData.shipping_rules.length; i++) {
const rule = appData.shipping_rules[i]
if (
rule &&
(!rule.service_code || rule.service_code === coProduto) &&
checkZipCode(rule) &&
!(rule.min_amount > params.subtotal)
) {
// valid shipping rule
if (rule.free_shipping) {
shippingLine.discount += shippingLine.total_price
shippingLine.total_price = 0
break
} else if (rule.discount) {
let discountValue = rule.discount.value
if (rule.discount.percentage) {
discountValue *= (shippingLine.total_price / 100)
}
if (discountValue) {
shippingLine.discount += discountValue
shippingLine.total_price -= discountValue
if (shippingLine.total_price < 0) {
shippingLine.total_price = 0
}
}
break
}
}
}
}
// push shipping service object to response
response.shipping_services.push({
label,
carrier: 'Correios',
// https://informederendimentos.com/consulta/cnpj-correios/
carrier_doc_number: '34028316000103',
service_code: coProduto,
service_name: serviceName || label,
shipping_line: shippingLine
})
})
res.send(response)
}