added exchange-rate endpoint, modified some other stuff
This commit is contained in:
Xargana
parent
8979cf12f0
commit
7cc5ea85e0
8 changed files with 539 additions and 2140 deletions
351
api/exchange-rate/exchange-rate.js
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351
api/exchange-rate/exchange-rate.js
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const express = require('express');
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const axios = require('axios');
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const fs = require('fs');
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const path = require('path');
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const router = express.Router();
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// Get API key from environment variables
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const API_KEY = process.env.EXCHANGE_RATE_API_KEY;
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if (!API_KEY) {
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console.error('WARNING: EXCHANGE_RATE_API_KEY environment variable is not set!');
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console.error('Exchange rate functionality will not work correctly.');
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}
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const BASE_URL = 'https://v6.exchangerate-api.com/v6';
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// We'll use USD as our single base currency
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const BASE_CURRENCY = 'USD';
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// Path to the cache file
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const CACHE_FILE_PATH = path.join(__dirname, 'exchange-rates-cache.json');
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// In-memory storage for cached exchange rates
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let exchangeRatesCache = {
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USD: {
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lastUpdated: null,
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rates: {},
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nextUpdateTime: null
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}
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};
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// one day in milliseconds
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const UPDATE_INTERVAL = 1 * 24 * 60 * 60 * 1000;
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// Load cached exchange rates from file
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function loadCachedRates() {
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try {
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if (fs.existsSync(CACHE_FILE_PATH)) {
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const data = fs.readFileSync(CACHE_FILE_PATH, 'utf8');
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const parsedData = JSON.parse(data);
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// Convert string dates back to Date objects
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if (parsedData.USD) {
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if (parsedData.USD.lastUpdated) {
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parsedData.USD.lastUpdated = new Date(parsedData.USD.lastUpdated);
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}
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if (parsedData.USD.nextUpdateTime) {
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parsedData.USD.nextUpdateTime = new Date(parsedData.USD.nextUpdateTime);
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}
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}
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exchangeRatesCache = parsedData;
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console.log('Loaded exchange rates from cache file');
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} else {
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console.log('No cache file found, will create one when rates are fetched');
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}
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} catch (error) {
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console.error('Error loading cached exchange rates:', error.message);
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// Continue with default cache if file can't be loaded
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}
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}
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// Save exchange rates to cache file
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function saveCachedRates() {
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try {
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fs.writeFileSync(CACHE_FILE_PATH, JSON.stringify(exchangeRatesCache, null, 2));
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console.log('Exchange rates saved to cache file');
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} catch (error) {
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console.error('Error saving exchange rates to cache file:', error.message);
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}
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}
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// Function to fetch and update exchange rates using USD as base
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async function updateExchangeRates() {
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if (!API_KEY) {
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console.error('Cannot update exchange rates: API key is not set');
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return false;
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}
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try {
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console.log(`Fetching latest exchange rates using ${BASE_CURRENCY} as base...`);
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const response = await axios.get(`${BASE_URL}/${API_KEY}/latest/${BASE_CURRENCY}`);
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if (response.data && response.data.result === 'success') {
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exchangeRatesCache.USD = {
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lastUpdated: new Date(),
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rates: response.data.conversion_rates,
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nextUpdateTime: new Date(Date.now() + UPDATE_INTERVAL)
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};
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// Save to file after updating
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saveCachedRates();
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console.log('Exchange rates updated successfully');
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return true;
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}
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return false;
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} catch (error) {
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console.error('Failed to update exchange rates:', error.message);
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return false;
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}
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}
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// Check if rates need updating and update if necessary
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async function ensureRatesUpdated() {
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if (!exchangeRatesCache.USD.lastUpdated ||
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Date.now() > exchangeRatesCache.USD.nextUpdateTime.getTime()) {
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return await updateExchangeRates();
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}
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console.log(`Using cached rates, next update: ${exchangeRatesCache.USD.nextUpdateTime}`);
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return true;
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}
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// Calculate conversion rate between any two currencies using USD as base
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function calculateRate(from, to) {
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const rates = exchangeRatesCache.USD.rates;
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// If either currency is USD, we can use the rate directly
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if (from === 'USD') return rates[to];
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if (to === 'USD') return 1 / rates[from];
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// Otherwise, calculate cross rate: from -> USD -> to
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return rates[to] / rates[from];
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}
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// Load cached rates when the module is loaded
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loadCachedRates();
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// Initialize rates if needed
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ensureRatesUpdated();
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// Root endpoint
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router.get('/', (req, res) => {
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const availableCurrencies = exchangeRatesCache.USD.rates ?
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Object.keys(exchangeRatesCache.USD.rates) : [];
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res.json({
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message: 'Exchange Rate API is running',
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baseCurrency: BASE_CURRENCY,
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availableCurrencies,
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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nextUpdate: exchangeRatesCache.USD.nextUpdateTime,
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updateInterval: '3 days',
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endpoints: {
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latest: '/latest',
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convert: '/convert/:from/:to/:amount',
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currencies: '/currencies'
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}
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});
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});
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// Get all cached exchange rates
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router.get('/latest', async (req, res) => {
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await ensureRatesUpdated();
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if (!exchangeRatesCache.USD.rates) {
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return res.status(503).json({ error: 'Exchange rate data not yet available' });
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}
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res.json({
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result: 'success',
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base: BASE_CURRENCY,
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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nextUpdate: exchangeRatesCache.USD.nextUpdateTime,
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rates: exchangeRatesCache.USD.rates
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});
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});
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// Get rates for a specific currency as base
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router.get('/latest/:currency', async (req, res) => {
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const { currency } = req.params;
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const currencyCode = currency.toUpperCase();
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await ensureRatesUpdated();
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if (!exchangeRatesCache.USD.rates) {
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return res.status(503).json({ error: 'Exchange rate data not yet available' });
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}
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// Check if the currency is supported
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if (!exchangeRatesCache.USD.rates[currencyCode] && currencyCode !== 'USD') {
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return res.status(400).json({ error: `Currency '${currencyCode}' not supported` });
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}
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// Calculate rates with the requested currency as base
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const rates = {};
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const usdRates = exchangeRatesCache.USD.rates;
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// If the requested base is USD, return rates directly
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if (currencyCode === 'USD') {
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res.json({
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result: 'success',
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base: currencyCode,
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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nextUpdate: exchangeRatesCache.USD.nextUpdateTime,
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rates: usdRates
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});
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return;
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}
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// Otherwise, calculate rates for all currencies with the requested currency as base
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const baseRate = usdRates[currencyCode]; // Rate of 1 USD in the requested currency
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// Add USD rate
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rates['USD'] = 1 / baseRate;
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// Add rates for all other currencies
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for (const toCurrency in usdRates) {
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if (toCurrency !== currencyCode) {
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// Convert through USD: from -> USD -> to
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rates[toCurrency] = usdRates[toCurrency] / baseRate;
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}
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}
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// Add rate for the base currency itself
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rates[currencyCode] = 1;
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res.json({
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result: 'success',
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base: currencyCode,
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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nextUpdate: exchangeRatesCache.USD.nextUpdateTime,
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rates: rates
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});
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});
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// Get list of available currencies
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router.get('/currencies', async (req, res) => {
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await ensureRatesUpdated();
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const availableCurrencies = exchangeRatesCache.USD.rates ?
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Object.keys(exchangeRatesCache.USD.rates) : [];
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res.json({
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result: 'success',
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baseCurrency: BASE_CURRENCY,
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availableCurrencies,
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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nextUpdate: exchangeRatesCache.USD.nextUpdateTime
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});
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});
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// Convert between currencies using cached rates
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router.get('/convert/:from/:to/:amount', async (req, res) => {
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const { from, to, amount } = req.params;
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const fromCurrency = from.toUpperCase();
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const toCurrency = to.toUpperCase();
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await ensureRatesUpdated();
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if (!exchangeRatesCache.USD.rates) {
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return res.status(503).json({ error: 'Exchange rate data not yet available' });
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}
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// Check if currencies are supported
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if (fromCurrency !== 'USD' && !exchangeRatesCache.USD.rates[fromCurrency]) {
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return res.status(400).json({ error: `Currency '${fromCurrency}' not supported` });
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}
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if (toCurrency !== 'USD' && !exchangeRatesCache.USD.rates[toCurrency]) {
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return res.status(400).json({ error: `Currency '${toCurrency}' not supported` });
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}
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try {
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const numericAmount = parseFloat(amount);
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if (isNaN(numericAmount)) {
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return res.status(400).json({ error: 'Invalid amount' });
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}
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// Calculate conversion rate
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const rate = calculateRate(fromCurrency, toCurrency);
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const convertedAmount = numericAmount * rate;
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res.json({
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result: 'success',
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from: fromCurrency,
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to: toCurrency,
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amount: numericAmount,
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rate,
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convertedAmount: parseFloat(convertedAmount.toFixed(4)),
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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nextUpdate: exchangeRatesCache.USD.nextUpdateTime
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});
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} catch (error) {
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console.error('Conversion error:', error);
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res.status(500).json({ error: 'Failed to convert currency' });
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}
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});
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// Direct pair conversion (fallback to API if needed)
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router.get('/pair/:from/:to/:amount', async (req, res) => {
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const { from, to, amount } = req.params;
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const fromCurrency = from.toUpperCase();
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const toCurrency = to.toUpperCase();
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// First try to use our cached rates
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await ensureRatesUpdated();
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if (exchangeRatesCache.USD.rates &&
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(fromCurrency === 'USD' || exchangeRatesCache.USD.rates[fromCurrency]) &&
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(toCurrency === 'USD' || exchangeRatesCache.USD.rates[toCurrency])) {
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try {
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const numericAmount = parseFloat(amount);
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if (isNaN(numericAmount)) {
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return res.status(400).json({ error: 'Invalid amount' });
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}
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// Calculate conversion rate
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const rate = calculateRate(fromCurrency, toCurrency);
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const convertedAmount = numericAmount * rate;
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res.json({
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result: 'success',
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from: fromCurrency,
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to: toCurrency,
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amount: numericAmount,
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rate,
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convertedAmount: parseFloat(convertedAmount.toFixed(4)),
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lastUpdated: exchangeRatesCache.USD.lastUpdated,
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source: 'cache'
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});
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return;
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} catch (error) {
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console.error('Error using cached rates:', error);
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// Fall through to API call
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}
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}
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// If we can't use cached rates, call the API directly
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if (!API_KEY) {
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return res.status(503).json({ error: 'Exchange rate API key is not configured' });
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}
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try {
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const response = await axios.get(`${BASE_URL}/${API_KEY}/pair/${fromCurrency}/${toCurrency}/${amount}`);
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// Update our cache with the latest USD rates if it's time
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ensureRatesUpdated();
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res.json({
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...response.data,
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source: 'api'
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});
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} catch (error) {
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res.status(500).json({ error: 'Failed to convert currency' });
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}
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});
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module.exports = router;
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171
api/exchange-rate/exchange-rates-cache.json
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171
api/exchange-rate/exchange-rates-cache.json
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{
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"USD": {
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"lastUpdated": "2025-04-07T18:49:41.384Z",
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"rates": {
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"USD": 1,
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"AED": 3.6725,
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"AFN": 71.3562,
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"ALL": 90.1377,
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"AMD": 391.1786,
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"ANG": 1.79,
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"AOA": 918.5748,
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"ARS": 1075.88,
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"AUD": 1.662,
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"AWG": 1.79,
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"AZN": 1.6999,
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"BAM": 1.7805,
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"BBD": 2,
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"BDT": 121.3674,
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"BGN": 1.7804,
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"BHD": 0.376,
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"BIF": 2960.3407,
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"BMD": 1,
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"BND": 1.3404,
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"BOB": 6.8885,
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"BRL": 5.7194,
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"BSD": 1,
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"BTN": 85.5708,
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"BWP": 13.8733,
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"BYN": 3.1354,
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"BZD": 2,
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"CAD": 1.423,
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"CDF": 2899.0345,
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"CHF": 0.8524,
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"CLP": 960.6602,
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"CNY": 7.2857,
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"COP": 4203.747,
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"CRC": 502.4294,
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"CUP": 24,
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"CVE": 100.3829,
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"CZK": 22.9524,
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"DJF": 177.721,
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"DKK": 6.7905,
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"DOP": 62.8304,
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"DZD": 132.995,
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"EGP": 50.8068,
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"ERN": 15,
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"ETB": 131.8684,
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"EUR": 0.9102,
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"FJD": 2.3154,
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"FKP": 0.7757,
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"FOK": 6.7935,
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"GBP": 0.7751,
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"GEL": 2.7559,
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"GGP": 0.7757,
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"GHS": 15.5067,
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"GIP": 0.7757,
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"GMD": 72.6441,
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"GNF": 8570.968,
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"GTQ": 7.6902,
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"GYD": 209.8017,
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"HKD": 7.7734,
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"HNL": 25.5147,
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"HRK": 6.8592,
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"HTG": 130.7844,
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"HUF": 369.6088,
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"IDR": 16757.5574,
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"ILS": 3.7448,
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"IMP": 0.7757,
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"INR": 85.5703,
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"IQD": 1309.7144,
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"IRR": 42008.9149,
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"ISK": 131.125,
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"JEP": 0.7757,
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"JMD": 157.719,
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"JOD": 0.709,
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"JPY": 145.2473,
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"KES": 129.2338,
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"KGS": 86.8492,
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"KHR": 3997.3556,
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"KID": 1.6621,
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"KMF": 447.8769,
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"KRW": 1457.9608,
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"KWD": 0.307,
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"KYD": 0.8333,
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"KZT": 510.3326,
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"LAK": 21751.6772,
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"LBP": 89500,
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"LKR": 295.3817,
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"LRD": 199.3433,
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"LSL": 19.1915,
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"LYD": 4.8358,
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"MAD": 9.5166,
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"MDL": 17.6443,
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"MGA": 4654.3433,
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"MKD": 55.9208,
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"MMK": 2090.2388,
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"MNT": 3479.6583,
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"MOP": 8.0068,
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"MRU": 39.8843,
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"MUR": 44.5309,
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"MVR": 15.4592,
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"MWK": 1740.2553,
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"MXN": 20.5515,
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"MYR": 4.437,
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"MZN": 63.6781,
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"NAD": 19.1915,
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"NGN": 1529.0612,
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"NIO": 36.6793,
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"NOK": 10.7699,
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"NPR": 136.9132,
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"NZD": 1.7956,
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"OMR": 0.3845,
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"PAB": 1,
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"PEN": 3.6809,
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"PGK": 4.0959,
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"PHP": 57.3644,
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"PKR": 280.7358,
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"PLN": 3.8787,
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"PYG": 8001.2022,
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"QAR": 3.64,
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"RON": 4.5185,
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"RSD": 106.3911,
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"RUB": 84.4536,
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"RWF": 1422.8596,
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"SAR": 3.75,
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"SBD": 8.3385,
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"SCR": 14.8196,
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"SDG": 458.3047,
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"SEK": 10.0072,
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"SGD": 1.3405,
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"SHP": 0.7757,
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"SLE": 22.7181,
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"SLL": 22718.051,
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"SOS": 571.0444,
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"SRD": 36.8241,
|
||||
"SSP": 4519.748,
|
||||
"STN": 22.3043,
|
||||
"SYP": 12873.9497,
|
||||
"SZL": 19.1915,
|
||||
"THB": 34.3823,
|
||||
"TJS": 10.9221,
|
||||
"TMT": 3.4983,
|
||||
"TND": 3.0571,
|
||||
"TOP": 2.3833,
|
||||
"TRY": 38.0295,
|
||||
"TTD": 6.7342,
|
||||
"TVD": 1.6621,
|
||||
"TWD": 33.1309,
|
||||
"TZS": 2647.2453,
|
||||
"UAH": 41.1747,
|
||||
"UGX": 3662.2001,
|
||||
"UYU": 42.042,
|
||||
"UZS": 12937.493,
|
||||
"VES": 72.1856,
|
||||
"VND": 25642.7185,
|
||||
"VUV": 121.865,
|
||||
"WST": 2.8015,
|
||||
"XAF": 597.1692,
|
||||
"XCD": 2.7,
|
||||
"XCG": 1.79,
|
||||
"XDR": 0.751,
|
||||
"XOF": 597.1692,
|
||||
"XPF": 108.6373,
|
||||
"YER": 244.8828,
|
||||
"ZAR": 19.2142,
|
||||
"ZMW": 27.9801,
|
||||
"ZWL": 6.7864
|
||||
},
|
||||
"nextUpdateTime": "2025-04-10T18:49:41.384Z"
|
||||
}
|
||||
}
|
||||
|
|
@ -3,18 +3,24 @@ const cors = require("cors");
|
|||
const fs = require("fs");
|
||||
const https = require("https");
|
||||
const http = require("http");
|
||||
const status = require("./status/server")
|
||||
const path = require("path");
|
||||
// load environment variables from .env file
|
||||
require('dotenv').config({ path: path.join(__dirname, '../.env') });
|
||||
|
||||
const status = require("./status/status");
|
||||
const exchangeRate = require("./exchange-rate/exchange-rate");
|
||||
|
||||
const app = express();
|
||||
const PORT = 2589;
|
||||
const PORT = process.env.PORT || 2589;
|
||||
|
||||
const key = "/etc/letsencrypt/live/blahaj.tr/privkey.pem"
|
||||
const cert = "/etc/letsencrypt/live/blahaj.tr/fullchain.pem"
|
||||
const key = process.env.SSL_KEY_PATH || "/etc/letsencrypt/live/blahaj.tr/privkey.pem";
|
||||
const cert = process.env.SSL_CERT_PATH || "/etc/letsencrypt/live/blahaj.tr/fullchain.pem";
|
||||
|
||||
app.use(cors());
|
||||
app.use("/status", status);
|
||||
app.use("/exchange-rate", exchangeRate);
|
||||
|
||||
// Try to load certificates
|
||||
// try to load certificates
|
||||
try {
|
||||
const sslOptions = {
|
||||
key: fs.readFileSync(key),
|
||||
|
|
@ -33,7 +39,7 @@ try {
|
|||
|
||||
console.log("Starting server without SSL...");
|
||||
|
||||
// Start http server as fallback
|
||||
// start http server as fallback
|
||||
http.createServer(app).listen(PORT, () => {
|
||||
console.log(`API running at http://localhost:${PORT}`);
|
||||
});
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue