Bloomberg Currency provides an easy-to-use API to pull currency exchange rates from the Bloomberg site. If you would like to test out this gem before including it into your project, feel free to clone it, bundle it and run bin/console for an interactive prompt.
Add this line to your application's Gemfile:
gem 'bloomberg_currency'And then execute:
$ bundle
Or install it yourself as:
$ gem install bloomberg_currency
NOTE: From version 0.1.0 to 1.0.0 there are mayor breaking changes. Please make sure you read the docs before installing/upgrading to the newest version.
The gem usability has been improved in version 1.0.0. Now you only need to create an instance of the class BC::Quote, passing the two currencies you'd like to get information about, like this:
quote = BC::Quote.new('USD', 'EUR')
=> #<BC::Quote:0x00007fd5858f1620 @price=0.8303, @datetime="", @detail=#<BC::QuoteDetail:0x00007fd583330238 @open=0.8307, @day_range=0.8299..0.8307, @previous_close=0.8306, @last_52_weeks_range=0.8098..0.94, @ytd_return=1.43>, @available=true>
quote.detail
=> #<BC::QuoteDetail:0x00007fd583330238 @open=0.8307, @day_range=0.8299..0.8307, @previous_close=0.8306, @last_52_weeks_range=0.8098..0.94, @ytd_return=1.43>
Then the quote object offers a few accessor methods:
price: Returns a float pricedatetime: Returns the date time when the price was captureddetail: Returns an object of the class BC::QuoteDetail which encapsulate the details of the quote. Will be explained later on.available?: Return true or false if the exchange is available or not.
The BC::QuoteDetail class offers the following methods:
open: Returns the value in which the currency opened.day_range: Returns the day range up until the moment the quote is generated.previous_close: Returns the value where the exchange closed last day.last_52_weeks_range: Returns the range od the last 52 weeks.ytd_return: Returns the YTD percentage.
NOTE: When the some of the markets close, the open and day_range attributes on the Bloomberg site aren't displayed. So those attributes may not be present if the market is closed. But the quote may still be available.
Getting information about the USD and EUR exchange:
quote = BC::Quote.new('USD', 'EUR')
quote.price
=> 0.8147
quote.datetime
=> #<DateTime: 2018-01-16T14:35:00-05:00 ((2458135j,70500s,0n),-18000s,2299161j)>
quote.detail
=> #<BC::QuoteDetail:0x007faadd9fb868 @open=0.8154, @day_range=0.8143..0.8199, @previous_close=0.8154, @last_52_weeks_range=0.8133..0.9529, @ytd_return=-1.91>
quote.available?
=> true
After checking out the repo, run bin/setup to install dependencies. Then, run rspec spec 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.
If you would like to contribute please fork the repository, make your changes and create a PR.
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.
Bug reports and pull requests are welcome on GitHub at https://github.com/sebasjimenez10/bloomberg_currency. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
The gem is available as open source under the terms of the MIT License.