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prorate

v0.2.2

Published

Subscription payment calculations. Calculates upgrades, downgrades, and prorated amounts.

Downloads

109

Readme

prorate

Compute billing subscription upgrades, downgrades and prorated amounts. Uses Big.js to ensure accuracy of calculations.

Installation

npm install prorate --save

Usage

When starting a subscription use the signup method to comute the amount to bill the user.

var prorate = require('prorate');
var percent = prorate.monthPercentage(); //between 0 and 1
var planPrice = 1.00;
var amount = prorate.signup(percent, planPrice);

The usage for a subscription plan upgrade or downgrade is handled by the change method.

var prorate = require('prorate');
var percent = prorate.monthPercentage(); //between 0 and 1
var planPrice1 = 1.00;
var planPrice2 = 2.00;
var amount = prorate.change(percent, planPrice1, planPrice2);

The usage for a subscription plan cancellation is handled by the cancel method.

var prorate = require('prorate');
var percent = prorate.monthPercentage(); //between 0 and 1
var planPrice = 1.00;
var amount = prorate.cancel(percent, planPrice);

There is a convience method monthPercentage to aid in calculating the percentage of time.

var prorate = require('prorate');

// using current time
var percentNow = prorate.monthPercentage();

// using a date
var date = new Date('December 17, 1995 03:24:00');
var percentDate = prorate.monthPercentage(date);

Tests

npm install -g mocha
npm install -g chai
mocha test

Code Quality

npm install -g eslint
eslint .

People

The current maintainer is Dan Hollenbeck.

LICENSE

MIT