Expiry Calculator

A ruby library that determines how much time left till certain date and time.

Installation

Install the gem and add to the application's Gemfile by executing:

bundle add expiry_calculator

If bundler is not being used to manage dependencies, install the gem by executing:

gem install expiry_calculator

Usage

Add the library if gem auto loading is not available.

require "expiry_calculator"

You can use the the extendable module method:

ExpiryCalculator.calculate(2025, 10, 10)
# => 201

Or mix in to use the calcuate function directly:

include ExpiryCalculator

calculate Date.new(2025, 10, 10)
# => 201

calculate "2025-01-10"
# => 0

Active record models and be called with the date field needed to calculate:

user = User.first
calculate user, :birth_day
# => 15

The supported objects:

• Date
• DateTime
• string: attempted to be parsed as datetime object.
• ActiveRecord: given an attribute of of the model to read as date object.

API Docs

The gem specs can be found at RubyDocs.

Contributing

Bug reports and pull requests are welcome on GitHub.