Smartcar Ruby SDK

Ruby gem library to quickly get started with the Smartcar API.

Overview

The Smartcar API lets you read vehicle data (location, odometer) and send commands to vehicles (lock, unlock) using HTTP requests.

To make requests to a vehicle from a web or mobile application, the end user must connect their vehicle using Smartcar Connect. This flow follows the OAuth spec and will return a code which can be used to obtain an access token from Smartcar.

The Smartcar Ruby Gem provides methods to:

1. Generate the link to redirect to Connect.
2. Make a request to Smartcar with the code obtained from Connect to obtain an access and refresh token
3. Make requests to the Smartcar API to read vehicle data and send commands to vehicles using the access token obtained in step 2.

Before integrating with Smartcar's SDK, you'll need to register an application in the Smartcar Developer portal. If you do not have access to the dashboard, please request access.

Flow

• Create a new AuthClient object with your clientId, clientSecret, redirectUri, and required scope.
• Redirect the user to Smartcar Connect using getAuthUrl or one of our frontend SDKs.
• The user will login, and then accept or deny your scope's permissions.
• Handle the get request to redirectUri.
  • If the user accepted your permissions, req.query.code will contain an authorization code.
    • Use exchangeCode with this code to obtain an access object containing an access token (lasting 2 hours) and a refresh token (lasting 60 days).
      • Save this access object.
    • If the user denied your permissions, req.query.error will be set to "access_denied".
    • If you passed a state parameter to getAuthUrl, req.query.state will contain the state value.
• Get the user's vehicles with getVehicleIds.
• Create a new Vehicle object using a vehicleId from the previous response, and the access_token.
• Make requests to the Smartcar API.
• Use exchangeRefreshToken on your saved refreshToken to retrieve a new token when your accessToken expires.

Installation

Add this line to your application's Gemfile:

gem 'smartcar'

And then execute:

$ bundle

Or install it yourself as:

$ gem install smartcar

Usage

Setup the environment variables for CLIENT_ID and CLIENT_SECRET.

# Get your API keys from https://dashboard.smartcar.com/signup
export CLIENT_ID=<client id>
export CLIENT_SECRET=<client secret>

Example Usage for calling the reports API with oAuth token

2.5.7 :001 > require 'smartcar'
 => true
2.5.7 :003 > ids =  Smartcar::Vehicle.all_vehicle_ids(token: token)
 => ["4bb777b2-bde7-4305-8952-25956f8c0868"]
2.5.7 :004 > vehicle = Smartcar::Vehicle.new(token: token, id: ids.first)
 => #<Smartcar::Vehicle:0x00005564211a7c48 @token="5ae77cb0-7c1a-486a-ac20-00c76d2fd1aa", @id="4bb777b2-bde7-4305-8952-25956f8c0868", @unit_system="imperial">
2.5.7 :006 > vehicle.odometer
 => #<Smartcar::Odometer:0x00005564211330f0 @distance=17966.94802354251, @meta={"date"=>"Fri, 12 Jun 2020 06:04:32 GMT", "content-type"=>"application/json; charset=utf-8", "content-length"=>"30", "connection"=>"keep-alive", "access-control-allow-origin"=>"*", "sc-data-age"=>"2020-06-12T06:04:28.843Z", "sc-unit-system"=>"imperial", "sc-request-id"=>"3c447e9e-4cf7-43cb-b688-fba8db3d3582"}>
2.5.7 :007 > vehicle.battery
 => #<Smartcar::Battery:0x00005564210fcb18 @range=105.63, @percentRemaining=0.98, @meta={"date"=>"Fri, 12 Jun 2020 06:04:44 GMT", "content-type"=>"application/json; charset=utf-8", "content-length"=>"40", "connection"=>"keep-alive", "access-control-allow-origin"=>"*", "sc-data-age"=>"2020-06-12T06:04:28.843Z", "sc-unit-system"=>"imperial", "sc-request-id"=>"455ed4b0-b768-4961-86d7-436ad71cf0fa"}>
2.5.7 :009 > vehicle.lock!
 => true
2.5.7 :010 > vehicle.batch(["charge","battery"])
=> {:charge=>#<Smartcar::Charge:0x000055853d1fd7c8 @state="NOT_CHARGING", @isPluggedIn=false, @meta={"sc-data-age"=>"2020-06-12T06:18:50.581Z"}>, :battery=>#<Smartcar::Battery:0x000055853d1fd638 @range=105.63, @percentRemaining=0.98, @meta={"sc-data-age"=>"2020-06-12T06:18:50.581Z", "sc-unit-system"=>"imperial"}>}
2.5.7 :011 > vehicle.start_charge!
Traceback (most recent call last):
        5: from /usr/share/rvm/rubies/ruby-2.5.7/bin/irb:11:in `<main>'
        4: from (irb):5
        3: from /home/st-2vgpnn2/.rvm/gems/ruby-2.5.7/gems/smartcar-1.0.0/lib/smartcar/vehicle.rb:118:in `start_charge!'
        2: from /home/st-2vgpnn2/.rvm/gems/ruby-2.5.7/gems/smartcar-1.0.0/lib/smartcar/vehicle.rb:290:in `start_or_stop_charge!'
        1: from /home/st-2vgpnn2/.rvm/gems/ruby-2.5.7/gems/smartcar-1.0.0/lib/smartcar/base.rb:39:in `block (2 levels) in <class:Base>'
Smartcar::ExternalServiceError (API error - {"error":"vehicle_state_error","message":"Charging plug is not connected to the vehicle.","code":"VS_004"})

Example Usage for oAuth -

# To get the redirect URL :
2.5.5 :002 > options = {test_mode: true,scope: ["read_battery","read_charge","read_fuel","read_location","control_security","read_odometer","read_tires","read_vin","read_vehicle_info"],flags: ["country:DE"]}
2.5.5 :003 > require 'smartcar'
2.5.5 :004 > client = Smartcar::Oauth.new(options)
2.5.5 :005 > url = client.authorization_url
 => "https://connect.smartcar.com/oauth/authorize?approval_prompt=auto&client_id=<client id>&mode=test&redirect_uri=http%3A%2F%2Flocalhost%3A8000%2Fcallback&response_type=code&scope=read_battery+read_charge+read_fuel+read_location+control_security+read_odometer+read_tires+read_vin+read_vehicle_info&flags=country%3ADE"
# Redirect user to the above URL.
# After authentication user control reaches the callback URL with code.
# Use the code from the parameters and request a token
2.5.5 :006 > token_hash = client.get_token(code)
 => {"token_type"=>"Bearer", :access_token=>"56801a5e-6a0b-4d05-a43e-52a4d5e6648f", :refresh_token=>"4f46e7e4-28c5-47b3-ba8d-7dcef73d05dd", :expires_at=>1577875279}
# This access_token can be used to call the Smartcar APIs as given above.
# Store this hash and if it expired refresh the token OR use the code again to
# get a new token or use .

Development

To install this gem onto your local machine, run bundle exec rake install.

To run tests, make sure you have the env variables setup for client id and secret.

export INTEGRATION_CLIENT_ID=<client id>
export INTEGRATION_CLIENT_SECRET=<client secret>

Tests can be run using either default rake command OR specific rspec command.

bundle exec rake spec

NOTE : Do not forget to update the version number in version.rb.

Release

Deployments to Rubgygems is automated through Travis. After merging to master, create a tag on the latest commit on master and push it. That would trigger a CI job which will build, test and deploy to Rubygems. As a convention we use the version number of the gem for the release tag.

# After merging to master, checkout to master and pull code locally, then run the following
git tag v1.2.3
# now push the tags
git push origin --tags
Total 0 (delta 0), reused 0 (delta 0)
To github.com:smartcar/ruby-sdk.git
 * [new tag]         v1.2.3 -> v1.2.3

Contributing

To contribute, please:

1. Open an issue for the feature (or bug) you would like to resolve.
2. Resolve the issue and add tests in your feature branch.
3. Open a PR from your feature branch into master that tags the issue.