Appscript to record purchases with credit card

extract_expenses_from_email.js

function extractBankEmailData() {
  const subjectKeyword = "emailLabel"; // Replace with your Gmail label
  const sheetName = "sheetName"; // Replace with your sheet name

  // Calculate dates for filtering emails
  const today = new Date();
  const yesterday = new Date(today);
  yesterday.setDate(today.getDate() - 1);

  // Format dates as YYYY/MM/DD for Gmail search
  const formattedToday = formatDate(today);
  const formattedYesterday = formatDate(yesterday);

  // Search for emails with the specified subject
  // const searchQuery = `subject:${subjectKeyword} after:${formattedYesterday}`;
  const searchQuery = `subject:${subjectKeyword} after:${formattedYesterday} before:${formattedToday}`;
  const threads = GmailApp.search(searchQuery, 0, 10); // Get the latest 10 threads matching the subject
  const sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetName);

  // Get the current exchange rate from COP to EUR
  const exchangeRate = getExchangeRate("COP", "EUR");

  if (threads.length === 0) {
    Logger.log("No emails found with the specified subject.");
    return;
  }

  // Find the last non-empty row in columns A to F
  let currentRow = findLastNonEmptyRow(sheet, 1, 6) + 1; // Start at the next available row

  threads.forEach((thread) => {
    const messages = thread.getMessages();
    messages.forEach((email) => {
      const body = email.getPlainBody();

      // Regular expression to extract data
      const amountMatch = body.match(/(?:COP|\$)([\d.,]+)/);
      const date = email.getDate();
      const merchantMatch = body.match(/en (.+?) con tu T\.Cred/);

      if (amountMatch && date && merchantMatch) {
        const amount = amountMatch[1].replace(".", "").replace(",", ".");
        const formattedDate = formatDateMDY(date)
        const amountEUR = exchangeRate ? (amount * exchangeRate).toFixed(2) : null;   
        const merchant = merchantMatch ? merchantMatch[1] : "Unknown";           
        const category = categorizeMerchant(merchant);

        // Append to the spreadsheet
        sheet.getRange(currentRow, 1, 1, 6).setValues([[formattedDate, amount, amountEUR, null, category, merchant]]);
        currentRow++;
      }
    });
  });
}


function formatDate(date) {
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, "0");
  const day = String(date.getDate()).padStart(2, "0");
  return `${year}/${month}/${day}`;
}

function formatDateMDY(date) {
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, "0");
  const day = String(date.getDate()).padStart(2, "0");
  return `${month}/${day}/${year}`;
}

// Utility function to find the last non-empty row in a specific column range
function findLastNonEmptyRow(sheet, startCol, endCol) {
  const range = sheet.getRange(2, startCol, sheet.getLastRow(), endCol - startCol + 1);
  const values = range.getValues();
  for (let row = values.length - 1; row >= 0; row--) {
    if (values[row].some((cell) => cell !== "")) {
      return row + 2; // Adjust for row index starting from 2
    }
  }
  return 1; // Return 1 if no non-empty rows are found
}

// Fetch the exchange rate using a public API
function getExchangeRate(base, target) {
  const url = `https://api.exchangerate-api.com/v4/latest/${base}`;
  try {
    const response = UrlFetchApp.fetch(url);
    const data = JSON.parse(response.getContentText());
    return data.rates[target];
  } catch (error) {
    Logger.log(`Error fetching exchange rate: ${error}`);
    return null;
  }
}

function categorizeMerchant(merchant) {
  if (/Mercado/i.test(merchant)) {
    return "Comida";
  }
  if (/salud/i.test(merchant)) {
    return "Salud";
  }
  // Add more categories as needed
  return "Salida"; // Default category
}