sample-nodejs/ais-connect.js at master · Fintecture/sample-nodejs · GitHub

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const { FintectureClient } = require("fintecture-client");
const app = require("express")();
const path = require("path");
const dotenv = require("dotenv");
var bodyParser = require("body-parser");

app.set("view engine", "ejs");
app.set("views", __dirname + "/views/ais-connect");
app.use(bodyParser.urlencoded({ extended: false }));

dotenv.config({ path: path.join(__dirname, ".env") });

require("dotenv").config();

// Create the fintecture client instance
let client = new FintectureClient({
  app_id: process.env.APP_ID,
  app_secret: process.env.APP_SECRET,
  private_key: process.env.APP_PRIV_KEY,
  env: process.env.FINTECTURE_ENV,
});

// Define accessToken and CustomerID global variables
let accessToken;
let customerId;

// initial screen
app.get("/", async (_req, res) => {
  res.render("index", {
    country: "fr",
  });
});

// Redirect to connect
app.get("/connect", async (req, res, next) => {
  const psuType = req.query.psu_type || "all";
  const country = req.query.country || "fr";

  const config = {
    redirect_uri: process.env.APP_REDIRECT_URI,
    state: "bob",
    psu_type: psuType,
    country: country,
  };

  try {
    const connect = await client.getAisConnect(null, config);

    res.writeHead(301, { Location: connect.url });
    res.end();
  } catch (err) {
    next(err);
  }
});

app.get("/error_page", async (req, res) => {
  res.writeHead(200, { "Content-Type": "text/html; charset=utf-8" });
  res.write("<html><body>");
  res.end("<h1>Error page</h1>");
  res.end("</html></body>");
});

// Get 'code' querystring parameter and hit data api
app.get("/callback", async (req, res) => {
  const code = req.query.code;
  customerId = req.query.customer_id;
  accessToken = req.query.access_token;

  res.writeHead(200, { "Content-Type": "text/html; charset=utf-8" });
  res.write("<html><body>");

  if (code || accessToken) {
    try {
      // get the Fintecture access token to request the AIS APIs
      if (code) {
        const tokens = await client.getAccessToken(code);
        accessToken = tokens.access_token;
      }
      let accountholders = null;
      try {
        accountholders = await client.getAccountHolders(
          accessToken,
          customerId
        );
      } catch (e) {
        accountholders = {data: [{ attributes: { fullname: "NOT IMPLEMENTED" } }]};
      }
      const accounts = await client.getAccounts(accessToken, customerId);
      let page = _prettyDisplayAccountHolders(accountholders);
      page = page + "<br><br>" + _prettyDisplayAccounts(accounts);

      res.write(page);
    } catch (err) {
      console.log("error:", err);
      res.write(err.response ? JSON.stringify(err.response.data) : "error");
    }
  }
  res.write("</html></body>");
  res.end();
});

app.get("/transactions/:account", async (req, res) => {
  const account = req.params.account;

  res.writeHead(200, { "Content-Type": "text/html; charset=utf-8" });
  res.write("</html></body>");

  try {
    // get the Transaction details from the PSU
    let transactions = await client.getTransactions(
      accessToken,
      customerId,
      account,
      { "filter[date_from]": "max" }
    );
    res.write(_prettyDisplayTransactions(transactions));
    while (transactions.links.next) {
      transactions = await client.getTransactions(
        accessToken,
        customerId,
        account,
        { "filter[date_from]": "max" },
        null,
        transactions.links.next
      );
      res.write(_prettyDisplayTransactions(transactions));
    }
  } catch (err) {
    res.write(err.response ? JSON.stringify(err.response.data) : "error");
  }
  res.end("</html></body>");
});

app.get("/provider/:provider", async (req, res) => {
  try {
    // Authenticate to a bank for AIS connections
    let providerAuth = await client.getRedirectAuthUrl(
      null,
      req.params.provider,
      process.env.APP_REDIRECT_URI
    );
    res.redirect(providerAuth.url);
  } catch (err) {
    res.writeHead(200, { "Content-Type": "text/html; charset=utf-8" });
    res.write("<html><body>");
    res.write(err.response ? JSON.stringify(err.response.data) : "error");
    res.end("</html></body>");
  }
});

var _prettyDisplayAccountHolders = function (ahs) {
  let headers = "<tr><th>Account Holders</th></tr>";
  let rows = "";
  ahs.data.forEach((ah) => {
    rows = rows + "<tr><td>" + ah.attributes.full_name + "</td><tr>";
  });
  return (
    '<table style="border:1px black;padding: 10px;">' +
    headers +
    rows +
    "</table>"
  );
};

var _prettyDisplayAccounts = function (accounts) {
  let headers =
    "<tr><th>account_id</th><th>IBAN</th><th>Name</th><th>balance</th><th>currency</th></tr>";
  let rows = "";
  accounts.data.forEach((account) => {
    rows =
      rows +
      '<tr><td><a href="../transactions/' +
      account.id +
      '">' +
      account.attributes.account_id +
      "</a></td><td>" +
      account.attributes.iban +
      "</td><td>" +
      account.attributes.account_name +
      "</td><td>" +
      account.attributes.balance +
      "</td><td>" +
      account.attributes.currency +
      "</td><tr>";
  });
  return (
    '<table style="border:1px black;padding: 10px;">' +
    headers +
    rows +
    "</table>"
  );
};

var _prettyDisplayTransactions = function (transactions) {
  let headers =
    "<tr><th>date</th><th>communication</th><th>amount</th><th>currency</th></tr>";
  let rows = "";
  transactions.data.forEach((txn) => {
    rows =
      rows +
      "<tr><td>" +
      txn.attributes.booking_date +
      "</td><td>" +
      txn.attributes.communication +
      "</td><td>" +
      txn.attributes.amount +
      "</td><td>" +
      txn.attributes.currency +
      "</td><tr>";
  });
  return (
    '<table style="border:1px black;padding: 10px;">' +
    headers +
    rows +
    "</table><br>"
  );
};

app.listen(process.env.PORT || 1236, () =>
  console.log("Fintecture App listening on port 1236...")
);