Virtual accounts with test cases (#13)

* added virtual accounts api

* Virtual Accounts unit tests

* Added promise polyfill

* Updated readme and wiki

* Bumped the version to 1.4.0

README.md

@@ -79,6 +79,7 @@ instance.payments.all({
 
 - [Transfers](https://github.com/razorpay/razorpay-node/wiki#transfers)
 
+- [Virtual Accounts](https://github.com/razorpay/razorpay-node/wiki#virtual-accounts)
 ---
 
 

lib/razorpay.js

@@ -31,11 +31,12 @@ class Razorpay {
 
   addResources() {
     Object.assign(this, {
-      payments: require('./resources/payments')(this.api),
-      refunds: require('./resources/refunds')(this.api),
-      orders: require('./resources/orders')(this.api),
-      customers: require('./resources/customers')(this.api),
-      transfers: require('./resources/transfers')(this.api)
+      payments       : require('./resources/payments')(this.api),
+      refunds        : require('./resources/refunds')(this.api),
+      orders         : require('./resources/orders')(this.api),
+      customers      : require('./resources/customers')(this.api),
+      transfers      : require('./resources/transfers')(this.api),
+      virtualAccounts: require('./resources/virtualAccounts')(this.api),
     })
   }
 }

lib/resources/virtualAccounts.js

@@ -0,0 +1,75 @@
+"use strict";
+
+const Promise = require("promise");
+const { normalizeDate, normalizeNotes } = require('../utils/razorpay-utils');
+
+module.exports = function (api) {
+  return {
+    all(params = {}, callback) {
+      let { from, to, count, skip } = params
+      let url = '/virtual_accounts'
+
+      if (from) {
+        from = normalizeDate(from)
+      }
+
+      if (to) {
+        to = normalizeDate(to)
+      }
+
+      count = Number(count) || 10
+      skip = Number(skip) || 0
+
+      return api.get({
+        url,
+        data: {
+          from,
+          to,
+          count,
+          skip
+        }
+      }, callback)
+    },
+
+    fetch(virtualAccountId, callback) {
+
+      if (!virtualAccountId) {
+
+        return Promise.reject('`virtual_account_id` is mandatory');
+      }
+
+      let url = `/virtual_accounts/${virtualAccountId}`
+
+      return api.get({
+        url
+      }, callback)
+    },
+
+    create(params, callback) {
+      let { notes, ...rest } = params
+      let data = Object.assign(rest, normalizeNotes(notes))
+
+      return api.post({
+        url: '/virtual_accounts',
+        data
+      }, callback)
+    },
+
+    close(virtualAccountId, callback) {
+
+      if (!virtualAccountId) {
+
+        return Promise.reject('`virtual_account_id` is mandatory');
+      } 
+
+      let data = {
+        status: 'closed'
+      }
+
+      return api.patch({
+        url: `/virtual_accounts/${virtualAccountId}`,
+        data
+      }, callback)
+    },
+  }
+}