normalizing subscriptions to mrr

Author: n2parko

History.md

@@ -1,3 +1,6 @@
+0.0.3 - February 26, 2014
+-------------------------
+Normalizing subscriptions for MRR
 
 0.0.1 - February 26, 2014
 -------------------------

lib/subscriptions.js

@@ -1,4 +1,3 @@
-
 var util = require('util');
 
 /**
@@ -169,7 +168,7 @@ Subscriptions.prototype.print = function () {
 
 Subscriptions.prototype.mrr = function (start, end) {
   var mrr = this.started(start, end).subscriptions.reduce(function (memo, subscription) {
-    return memo + amount(subscription);
+    return memo + amountMrr(subscription);
   }, 0.00);
 
   return Math.round(mrr * 100) / 100.0; // to two decimal points
@@ -183,8 +182,9 @@ Subscriptions.prototype.mrr = function (start, end) {
  * @return {Number}
  */
 
-function amount (subscription) {
+function amountMrr (subscription) {
   var res = (subscription.plan.amount / 100.0);
+  res = normalizeMonths(subscription, res);
   if (res > 0.0) {
     var discount = subscription.customer.discount;
     if (discount && discount.coupon) {
@@ -197,4 +197,22 @@ function amount (subscription) {
     res *= (1.00 - 0.029); // Stripe fees
   }
   return res;
-}
+}
+
+//
+function normalizeMonths (subscription, res) {
+  var interval = subscription.plan.interval;
+  var count = subscription.plan.interval_count;
+  if (interval === 'day')
+    res *= 30 / count;
+  else if (interval === 'week')
+    res *= 4 / count;
+  else if (interval === 'month')
+    res *= 1 / count;
+  else if (interval === 'year'){
+    res = res / 12 / count;
+  }
+  else
+    throw new Error('Unexpected interval ' + interval);
+  return res;
+}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "stripe-cohort",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "main": "./lib",
   "repository": "git://github.com/segmentio/stripe-cohort.git",
   "license": "MIT",