initial commit

.gitattributes

@@ -0,0 +1 @@
+credentials.json filter=git-crypt diff=git-crypt

.gitignore

@@ -0,0 +1,4 @@
+*.pdf
+node_modules/
+payslips/
+token.json

fix-readline.js

@@ -0,0 +1,12 @@
+const readline = require('readline');
+const {promisify} = require('util');
+
+readline.Interface.prototype.question[promisify.custom] = function(prompt) {
+  return new Promise(resolve =>
+    readline.Interface.prototype.question.call(this, prompt, resolve),
+  );
+};
+readline.Interface.prototype.questionAsync = promisify(
+  readline.Interface.prototype.question,
+);
+module.exports = readline

index.js

@@ -0,0 +1,274 @@
+const readline = require('./fix-readline.js')
+const nodemailer = require('nodemailer')
+const fs = require('fs');
+const {google} = require('googleapis');
+const r2 = require('r2')
+const qs = require('querystring')
+const {promisify} = require('util')
+const readFile = promisify(fs.readFile)
+const base64url = require('base64url')
+const process = require('process')
+
+// If modifying these scopes, delete token.json.
+const SCOPES = ['https://www.googleapis.com/auth/drive','https://www.googleapis.com/auth/gmail.compose'];
+const USER = process.env['USER']
+
+const UserCapitalized = USER.charAt(0).toUpperCase() + USER.slice(1)
+
+const config = {
+    tokenPath: 'token.json',
+    fileId: "1CqUglyFNoEWL0lx-e7arqUGOOZEYW__JjcwBmNaXE6E",
+    template: `${UserCapitalized} ${(new Date()).getFullYear()} Template`,
+    to: "billing@serokell.io",
+    destdir: "payslips"
+}
+
+async function authAll() {
+    const content = await readFile('credentials.json')
+    return authorize(JSON.parse(content))
+}
+
+async function authorize(credentials) {
+    const {client_secret, client_id, redirect_uris} = credentials.installed;
+    const oAuth2Client = new google.auth.OAuth2(
+        client_id, client_secret, redirect_uris[0]);
+
+    // Check if we have previously stored a token.
+    let token
+    try {
+        token = await readFile(config.tokenPath)
+    } catch(e) {
+        return getAccessToken(oAuth2Client)
+    }
+    oAuth2Client.setCredentials(JSON.parse(token));
+    return oAuth2Client
+}
+
+async function ask(question) {
+    const rl = readline.createInterface({
+      input: process.stdin,
+      output: process.stdout,
+    });
+    const answer = await rl.questionAsync(question)
+    rl.close()
+    return answer
+}
+
+async function getAccessToken(oAuth2Client) {
+    const authUrl = oAuth2Client.generateAuthUrl({
+      access_type: 'offline',
+      scope: SCOPES,
+    });
+    console.log('Authorize this app by visiting this url:', authUrl);
+    const code = await ask('Enter the code from that page here: ')
+    const token = (await oAuth2Client.getToken(code)).tokens
+    oAuth2Client.setCredentials(token);
+    await promisify(fs.writeFile)(config.tokenPath, JSON.stringify(token))
+    console.log('Token stored to', config.tokenPath);
+    return oAuth2Client
+}
+class InvoiceDocument {
+    constructor(auth, fileId) {
+        Object.assign(this, {
+            auth, fileId,
+            sheets: google.sheets({version: 'v4', auth}),
+        })
+    }
+    async sheetByName(sheetname) {
+        const {sheets} = (await this.sheets.spreadsheets.get({
+            spreadsheetId: this.fileId,
+            includeGridData: false
+        })).data
+        const r = sheets.find(({properties: {title}}) => title == sheetname)
+        return r ? r.properties.sheetId : r
+    }
+    async sheetAsPdf(destFile, gid) {
+        const params = {
+            format: 'pdf', size: 7, fzr: true,
+            portrait: true, fitw: false, gridlines: false,
+            printtitle: false, sheetnames: false, pagenum: "UNDEFINED",
+            attachment: false, gid, printnotes: false
+        }
+        const token = this.auth.credentials.access_token
+        const dest = fs.createWriteStream(destFile)
+        // thanks, https://gist.github.com/Spencer-Easton/78f9867a691e549c9c70#gistcomment-2622947 
+        const res = await r2(`https://docs.google.com/spreadsheets/d/${this.fileId}/export?${qs.stringify(params)}`,
+                             {headers: {"Authorization": `Bearer ${token}`}}).response
+        res.body.pipe(dest)
+        return new Promise((resolve, reject) => {
+            res.body.on('end', resolve)
+                .on('error', reject)
+        })
+    }
+    async copyTo(src, dest) {
+        const templateId = await this.sheetByName(src)
+        if (!templateId) throw "template sheet not found"
+        const res = await this.sheets.spreadsheets.sheets.copyTo({
+            spreadsheetId: this.fileId,
+            sheetId: templateId,
+            resource: {
+                destinationSpreadsheetId: this.fileId
+            }
+        })
+        const updres = await this.sheets.spreadsheets.batchUpdate({
+            spreadsheetId: this.fileId,
+            resource: {
+                requests: [{
+                    updateSheetProperties: {
+                        fields: "title",
+                        properties: { sheetId: res.data.sheetId, title: dest }
+                    }
+                }]
+            }
+        })
+    }
+    async set(sheetname, vals) {
+        await this.sheets.spreadsheets.values.batchUpdate({
+            spreadsheetId: this.fileId,
+            resource: {
+                valueInputOption: "USER_ENTERED",
+                data: Object.keys(vals).map(range => ({range: `'${sheetname}'!${range}`, values: [[vals[range]]]}))
+            }
+        })
+    }
+    async get(sheetname, cell) {
+        const res = await this.sheets.spreadsheets.values.get({
+            spreadsheetId: this.fileId,
+            range: `'${sheetname}'!${cell}`
+        })
+        return res.data.values
+    }
+}
+async function composeDraft(title, iban, total, pdf, auth) {
+    const gmail = google.gmail({version: 'v1', auth})
+    const user = await gmail.users.getProfile({userId: 'me'})
+    const email = user.data.emailAddress
+    const transporter = nodemailer.createTransport({
+        streamTransport: true, newline: 'unix'
+    })
+    const body = `Hi!
+
+The total is ${total} to ${iban} (same as always). Thanks!`
+    // TODO: check if same as always
+    const msg = {
+        from: email,
+        to: config.to,
+        subject: `payslip - ${title}`,
+        text: body,
+        attachments: [{
+            filename: `payslip - ${title}.pdf`,
+            path: pdf
+        }]
+    }
+    transporter.sendMailAsync = promisify(transporter.sendMail)
+    const info = await transporter.sendMailAsync(msg)
+    const pdfStream = fs.createReadStream(pdf)
+    const draft = await gmail.users.drafts.create({
+        userId: 'me',
+        media: {mimeType: 'message/rfc822', body: info.message}
+    })
+    console.log(`Draft created, please review and send: https://mail.google.com/mail/u/${email}/#drafts?compose=${draft.data.message.id}`)
+}
+const datefmt = date =>
+      `${date.getFullYear()}-${(""+(date.getMonth()+1)).padStart(2, '0')}-${(""+date.getDate()).padStart(2, '0')}`
+const methods = {
+    async export(sheetname, pdfOut) { // save sheet as pdf
+        console.log("Exporting", sheetname, "to", pdfOut)
+        const sheetId = await this.doc.sheetByName(sheetname)
+        return this.doc.sheetAsPdf(pdfOut, sheetId)
+    },
+    async create(sheetname, template=config.template) { // copy sheet from template
+        console.log("Creating", sheetname, "from", template)
+        return this.doc.copyTo(template, sheetname)
+    },
+    async update(sheetname, startDate, endDate, hours) { // set values in sheet
+        console.log("Setting data in", sheetname)
+        hours = +hours
+        const values = {
+            regular: Math.min(hours, 80),
+            overwork: Math.max(0, hours-80),
+            startDate, endDate
+        }
+        console.log(values)
+        this.doc.set(sheetname, {
+            D16: values.regular, D17: values.overwork,
+            B9: values.startDate, D9: values.endDate
+        })
+    },
+    async draft(sheetname) { // export pdf+create gmail draft
+        const pdfname = `${config.destdir}/${sheetname}.pdf`
+        try {
+            await promisify(fs.mkdir)(config.destdir, {recursive: true})
+        } catch(e) {
+            if (e.code != 'EEXIST') throw e
+        }
+        await this.export(sheetname, pdfname)
+        const [[paid,,,, total]] = await this.doc.get(sheetname, "B33:F33")
+        const iban = paid.replace(/^Paid to /, '')
+        console.log(paid, total)
+        composeDraft(sheetname, iban, total, pdfname, this.auth)
+    },
+    async auto(hours) { // just do everything
+        const date = new Date()
+        const day = date.getDate()
+        let part = 'B'
+        if (day >= 10 && day < 28) {
+            part = 'A'
+        } else if (day < 10) {
+            // talking about last month
+            date.setMonth(date.getMonth()-1)
+        }
+        const month = date.toLocaleString('en-us', {month: 'short'})
+        const sheetname = `${UserCapitalized} ${date.getFullYear()} ${month} ${part}`
+        let startDate, endDate
+        if (part == 'A') {
+            date.setDate(1)
+            startDate = datefmt(date)
+            date.setDate(15)
+            endDate = datefmt(date)
+        } else {
+            date.setDate(16)
+            startDate = datefmt(date)
+            date.setMonth(date.getMonth()+1, 0)
+            endDate = datefmt(date)
+        }
+        const sheetId = await this.doc.sheetByName(sheetname)
+        if (!sheetId) {
+            await this.create(sheetname)
+        } else {
+            const answer = await ask(`Overwrite '${sheetname}'? [yN]: `)
+            if (answer.trim().toLowerCase()[0] != 'y') {
+                console.log("Aborting!")
+                return null
+            }
+        }
+        await this.update(sheetname, startDate, endDate, hours)
+        await this.draft(sheetname)
+    },
+    async authenticate() { // just auth
+    }
+}
+        
+const sig = fn =>
+      fn.toString().split('\n')[0].replace(/^async /, '').replace(/ \{/, '')
+
+// poor man's CLI
+const [,, method, ...args] = process.argv
+if (method in methods) {
+    if (args.length < methods[method].length) {
+        console.error("not enough arguments for method", sig(methods[method]))
+    } else {
+        authAll().then((auth) => {
+            methods.auth = auth
+            methods.doc = new InvoiceDocument(auth, config.fileId)
+            methods[method](...args)
+        })
+    }
+} else {
+    if (method && method != 'help') console.log("unknown subcall", method)
+    console.log("valid methods:")
+    for(const realMethod in methods) {
+        console.log(" ", sig(methods[realMethod]))
+    }
+    process.exit(1)
+}

package-lock.json

@@ -0,0 +1,299 @@
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+  "name": "skl-auto-payslip",
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+}

package.json

@@ -0,0 +1,17 @@
+{
+  "name": "skl-auto-payslip",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "base64url": "^3.0.1",
+    "googleapis": "^39.2.0",
+    "nodemailer": "^6.1.1",
+    "r2": "^2.0.1"
+  }
+}