gmail.js

const colorFormat = value => {
    if (parseFloat(value) > 0) return "green"
    if (parseFloat(value) < 0) return "maroon"
    return "black"
}

const htmlify = data => {
    const message = [
        `<html>
            <table>
                <tr><th width="80px">Data</th><th>Nazwa</th><th>Wartość</th><th>Zmiana</th></tr>`,
        ...data.map(row => `<tr>
                                <td>${row[0]}</td>
                                <td>${row[1]}</td>
                                <td style="text-align: right; width: 60px;">${row[2]}</td>
                                <td style="text-align: right; width: 60px; color:${colorFormat(row[3])}">${row[3]}</td>
                            </tr>`),
            `</table>
        </html>`
    ].join('')
    return message
}

const send = (auth, config, data) => {
    const gmail = require('googleapis').gmail('v1')
    const date = new Date
    const formattedDate = `${require('./utils').dateFormat(date)} ${require('./utils').timeFormat(date)}`
    const mime = [
        'Content-Type: text/html; charset="UTF-8"\n',
        'MIME-Version: 1.0\n',
        'Content-Transfer-Encoding: 7bit\n',
        `to: ${config.gmail.to}\n`,
        `from: ${config.gmail.from}\n`,
        `subject: ${config.gmail.subject} ${formattedDate}\n\n`,
        htmlify(data)
    ].join('')

    const raw = new Buffer(mime).toString('base64').replace(/\+/g, '-').replace(/\//g, '_')

    return new Promise((resolve, reject) => {
        gmail.users.messages.send({
            auth,
            userId: 'me',
            resource: {
                raw
            }
        }, reject)

        resolve(true)
    })

}

module.exports = {
    send
}