[![Gem Version](https://badge.fury.io/rb/omniauth-google-oauth2.svg)](https://badge.fury.io/rb/omniauth-google-oauth2)
[![Build Status](https://travis-ci.org/zquestz/omniauth-google-oauth2.svg)](https://travis-ci.org/zquestz/omniauth-google-oauth2)


# OmniAuth PayPal OAuth2 Strategy

Strategy to authenticate with PayPal via OmniAuth.

Get your API key at: https://developer.paypal.com/developer/applications/ in the section **RESTApps**. Note the Client ID and the Client Secret.

**Note**: You generate separate keys for development (sandbox) and production (live) with each application you register.
Use the [config Gem](https://rubygems.org/gems/config) to organize your keys and keep them save.

For more details, read the PayPal docs: https://developer.paypal.com/docs/integration/direct/identity/


## Installation

Add to your `Gemfile`:

```ruby
gem "omniauth-paypal-oauth2"
```

And then execute:

    $ bundle

Or install it yourself as:

    $ gem install omniauth-paypal-oauth2


## PayPal API Setup

* Go to 'https://developer.paypal.com/developer/applications/'
* Select your project.
* Scroll down to 'APP SETTINGS' for each 'SANDBOX' and 'LIVE'.
* Set `<YOURDOMAIN>/users/auth/paypal_oauth2/callback` as Return URL.
* Make sure "Log In with PayPal" is enabled and Save.
* Go to Credentials, then select the "OAuth consent screen" tab on top, and provide an 'EMAIL ADDRESS' and a 'PRODUCT NAME'
* Wait 10 minutes for changes to take effect.


## Usage

Here's an example for adding the middleware to a Rails app in `config/initializers/omniauth.rb`:

```ruby
Rails.application.config.middleware.use OmniAuth::Builder do
    provider :paypal_oauth2, ENV["PAYPAL_CLIENT_ID"], ENV["PAYPAL_CLIENT_SECRET"]
end
```

You can now access the OmniAuth PayPal OAuth2 URL: `/auth/paypal_oauth2`

**Note**: While developing your application, if you change the scope in the initializer you will need to restart your app server. Remember that either the 'email' or 'profile' scope is required!


## Configuration

If you click from your [Applications Dashboard](https://developer.paypal.com/developer/applications/) in your Application on "Advanced Options" in the "APP SETTINGS" section and "Log In with PayPal" subsection, you can configure several options:

* `Basic authentication`: The unique identifier PPID (PayPal ID) is provided. No additional customer information. **Not customizale**.

* `Personal Information`:
    * `Full name`: Permits the Name of the customer.
    * `Date of birth`: Permits the date of birth of the customer.
    * `Age range`: Permits an approximate age range of the customer.

* `Address Information`:
    * `Email address`: Permits the email address of the customer.
    * `Street address`: Permits the street address of the customer (Street name, House number).
    * `City`: Permits the city name where the customer resides.
    * `State`: Permits the state in which the city is located.
    * `Country`: Permits the country in which both state and city are located.
    * `Zip code`: Permits the Zip code of the customer.
    * `Phone`: Permits the phone number of the customer.

* `Account Information`:
    * `Account status (verified)`: Permits a boolean which indicates whether the customer is verified by PayPal or not.
    * `Account type`: Permits a string which indicates the account type of the PayPal customer (e.g.: PERSONAL, BUSINESS).
    * `Account creation date`: Permits the date on which the PayPal account got created.
    * `Time zone`: Permits the time zone in which the PayPal customer is located.
    * `Locale`: Permits a locale string which indicates where the PayPal customer is.
    * `Language`: Permits the language the customer uses on PayPal.


## Auth Hash

Here's an example of an authentication hash available in the callback by accessing `request.env["omniauth.auth"]`:

```ruby
{
    provider: "paypal",
    uid: "bathjJwvdhKjgfgh8Jd745J7dh5Qkgflbnczd65dfnw",
    info: {
        name: "John Smith",
        email: "example@example.com",
        first_name: "John",
        last_name: "Smith",
        given_name: "John",
        family_name: "Smith",
        location: "Moscow",
        phone: "71234567890"
    },
    credentials: {
        token: "token",
        refresh_token: "refresh_token",
        expires_at: 1355082790,
        expires: true
    },
    extra: {
        account_creation_date: "2008-04-21",
        account_type: "PERSONAL",
        user_id: "https://www.paypal.com/webapps/auth/identity/user/bathjJwvdhKjgfgh8Jd745J7dh5Qkgflbnczd65dfnw",
        address: {
            country: "US",
            locality: "San Jose",
            postal_code: "95131",
            region: "CA",
            street_address: "1 Main St"
        },
        language: "en_US",
        locale: "en_US",
        verified_account: true,
        zoneinfo: "America/Los_Angeles",
        age_range: "31-35",
        birthday: "1982-01-01"
    }
}
```

For more details see the PayPal [List Of Attributes](https://developer.paypal.com/webapps/developer/docs/integration/direct/log-in-with-paypal/detailed/#attributes).


### Devise

First define your application id and secret in `config/initializers/devise.rb`. Do not use the snippet mentioned in the [Usage](https://github.com/jonhue/omniauth-paypal-oauth2#usage) section.

Configuration options can be passed as the last parameter here as key/value pairs.

```ruby
config.omniauth :paypal_oauth2, "PAYPAL_CLIENT_ID", "PAYPAL_CLIENT_SECRET", { }
```

Then add the following to 'config/routes.rb' so the callback routes are defined.

```ruby
devise_for :users, :controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }
```

Make sure your model is omniauthable. Generally this is "/app/models/user.rb"

```ruby
devise :omniauthable, :omniauth_providers => [:paypal_oauth2]
```

Then make sure your callbacks controller is setup.

```ruby
class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def paypal_oauth2
      # You need to implement the method below in your model (e.g. app/models/user.rb)
      @user = User.from_omniauth(request.env["omniauth.auth"])

      if @user.persisted?
        flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "PayPal"
        sign_in_and_redirect @user, :event => :authentication
      else
        session["devise.paypal_data"] = request.env["omniauth.auth"]
        redirect_to new_user_registration_url
      end
  end
end
```

and bind to or create the user

```ruby
def self.from_omniauth(access_token)
    data = access_token.info
    user = User.where(:email => data["email"]).first

    # Uncomment the section below if you want users to be created if they don't exist
    # unless user
    #     user = User.create(name: data["name"],
    #        email: data["email"],
    #        password: Devise.friendly_token[0,20]
    #     )
    # end
    user
end
```

For your views you can login using:

```erb
<%= link_to "Sign in with PayPal", user_paypal_oauth2_omniauth_authorize_path %>

<%# Devise prior 4.1.0: %>
<%= link_to "Sign in with PayPal", user_omniauth_authorize_path(:paypal_oauth2) %>
```

An overview is available at https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview


## License

MIT License

Copyright (c) 2017 Jonas Hübotter

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

<i>Original PayPal Omniauth Strategy: Copyright (c) 2011 by veloGraf Systems</i>