Expiry Calculator

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

Extracted from license manager app.

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

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.

The gem specs can be found at RubyDocs.

Bug reports and pull requests are welcome on GitHub.