cielo-qrcode-parser.js

gistfile1.txt

function getAdditionalData(subTags, value) {
    let additionalData = {}

    let subPosition = 0
    let subTotalStep = 2
    let subSize = 0

    subTags.map(subTag => {
        additionalData[subTag] = { name: subTag }
        additionalData[subTag].id = value.slice(subPosition, subTotalStep)
        subPosition = subTotalStep
        subTotalStep += 2

        subSize = parseInt(value.slice(subPosition, subTotalStep))
        subPosition = subTotalStep
        subTotalStep += subSize
        additionalData[subTag].value = value.slice(subPosition, subTotalStep)
        subPosition = subTotalStep
        subTotalStep += 2
    })

    return additionalData
}

export function cieloQrcodeParse(data) {    
    const tags = [
        'payloadFormatIndicator',
        'pointInitiationMethod',
        'merchantAccountInformation',
        'merchantCategoryCode',
        'transactionCurrency',
        'transactionAmount',
        'countryCode',
        'merchantName',
        'merchantCity',
        'transactionInformations',
        'crc'
    ]

    let payload = {}
    let position = 0
    let totalStep = 2
    let size = 0

    tags.map(tag => {
        payload[tag] = { name: tag }
        
        // Get ID - Always 2 positions (0, 2)
        payload[tag].id = data.slice(position, totalStep)
        position = totalStep
        
        if(payload[tag].id == "80") {
            totalStep += 3
        }
        else {
            totalStep += 2
        }

        // Get Size - Always 2 positions (2, 4)
        size = parseInt(data.slice(position, totalStep))
        position = totalStep
        totalStep += size
        // Get Value (4, +size)
        payload[tag].value = data.slice(position, totalStep)

        if(payload[tag].id == "26") {
            const subTags = [
                'globallyUniqueIdentifier',
                'merchantAccountInformation',
                'logicNumber'
            ]
            payload[tag].additionalData = getAdditionalData(subTags, payload[tag].value)
        }

        else if(payload[tag].id == "80") {
            const subTags = [
                'globallyUniqueIdentifier',
                'transactionId',
                'transactionDate',
                'mainProduct',
                'subProduct',
                'paymentInstallments',
                'transactionType'
            ]
            payload[tag].additionalData = getAdditionalData(subTags, payload[tag].value)
        }

        position = totalStep
        totalStep += 2
    })

    return payload
}