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# `SuperGood::SolidusTaxjar` [![Build Status](https://travis-ci.com/SuperGoodSoft/solidus_taxjar.svg?token=rc5QTgHvLLF7cpqkmyfd&branch=master)](https://travis-ci.com/SuperGoodSoft/solidus_taxjar)

`SuperGood::SolidusTaxjar` is a [Solidus](https://github.com/solidusio/solidus)
extension that allows Solidus stores to use [TaxJar](https://www.taxjar.com/)
for tax calculations.

This is not a fork of [spree_taxjar](https://github.com/vinsol-spree-contrib/spree_taxjar),
like [solidus_taxjar](https://github.com/boomerdigital/solidus_taxjar). Instead
of using a custom calculator, `SuperGood::SolidusTaxjar` uses the new
configurable tax system [by @adammathys](https://github.com/solidusio/solidus/pull/1892)
introduced in Solidus v2.4. This maps better to how the TaxJar API itself works.

## Installation

1. Add this line to your application's Gemfile:

    ```ruby
    gem 'super_good-solidus_taxjar'
    ```

    And then execute:

    ```sh
    bundle
    ```

1. Next, configure Solidus to use this gem by running the install generator:

    ```sh
    bundle exec rails generate super_good:solidus_taxjar:install
    ```

1. Also, configure your error handling:

    ```ruby
    # Put this in config/initializers/taxjar.rb

    SuperGood::SolidusTaxjar.exception_handler = ->(e) {
      # Report exceptions in here. For example, if you were using the Sentry's
      # raven-ruby gem to report errors, you might do this:
      Raven.capture_exception(e)
    }
    ```

1. Finally, make sure that the `TAXJAR_API_KEY` environment variable is set to
  your TaxJar API key and make sure that you have a `Spree::TaxRate` with the name
  "Sales Tax". This will be used as the source for the tax adjustments that
  Solidus creates.

## Project Status

This extension is under active development and not yet at a v1.0 release, but
it's currently being used in production by multiple Solidus stores.

Requirements for TaxJar integrations vary as some stores also need reporting,
which isn't provided out of the box by this extension. This is because
individual stores will be using different background job frameworks or runners
(Sidekiq, delayed_job, ActiveJob, etc.) and a reliable integration will rely on
one of these. Because this part of the integration is small, we've chosen to
provide the transaction reporting functionality, but have skipped directly
integrating it.

If you're having trouble integrating this extension with your store and would
like some assistance, please reach out to Jared via e-mail at [jared@super.gd](mailto:jared@super.gd)
or on the official Solidus Slack as `@Jared Norman`.

## Features

The extension provides currently two high level `calculator` classes that wrap
the low-level Ruby taxjar gem API calls:

* tax calculator
* tax rate calculator

The extension requires the `order_recalculated` event which is not supported on
Solidus < 2.11, so this extension provides a [compatibility layer](app/decorators/super_good/solidus_taxjar/spree/order_updater/fire_recalculated_event.rb).

### TaxCalculator

`SuperGood::SolidusTaxjar::TaxCalculator` allows calculating the full tax
breakdown for a given `Spree::Order`. The breakdown includes separate line items
taxes and shipment taxes.

### TaxRateCalculator

`SuperGood::SolidusTaxjar::TaxRateCalculator` allows calculating the tax rate
for a given `Spree::Address`. It relies on the same low-level Ruby TaxJar API
endpoint of the tax calculator in order to provide the most coherent and
reliable results. TaxJar support recommends using this endpoint for live
calculations.

## Development

Before installing dependencies, make sure your environment variables are setup.
Our CI uses something like this:
`SOLIDUS_BRANCH=v2.10 DB=postgresql RAILS_VERSION="~> 5.2.0"`.

**NOTE: These environment variables need to be set when installing dependencies
and running specs, so set them before each command like this:**

```sh
SOLIDUS_BRANCH=v2.10 DB=postgresql RAILS_VERSION="~> 5.2.0" bin/setup
```

Run `bin/setup` to install dependencies. Then, run `bundle exec rake` to run the
tests. You can also run `bin/console` for an interactive prompt that will allow
you to experiment.

To install this gem onto your local machine, run `bundle exec rake install`.
To release a new version, update the version number in `version.rb`, and then
run `bundle exec rake release`, which will create a git tag for the version,
push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).

## Contributing

Bug reports and pull requests are welcome on GitHub at [https://github.com/SuperGoodSoft/solidus_taxjar](https://github.com/SuperGoodSoft/solidus_taxjar).
This project is intended to be a safe, welcoming space for collaboration, and
contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org)
code of conduct.

## License

The gem is available as open source under the terms of the
[MIT License](https://opensource.org/licenses/MIT).

## Code of Conduct

Everyone interacting in the `SuperGood::SolidusTaxjar` project’s codebases,
issue trackers, chat rooms and mailing lists is expected to follow the
[code of conduct](https://github.com/SuperGoodSoft/solidus_taxjar/blob/master/CODE_OF_CONDUCT.md).