# Copied from https://github.com/raysrashmi/omniauth-foursquare
#
# Dependencies on the gem are old but the strategy still works fine
# on its own
#
# License: MIT

require 'omniauth-oauth2'

module OmniAuth
  module Strategies
    class Foursquare < OmniAuth::Strategies::OAuth2
      option :client_options, {
        site: 'https://foursquare.com',
        authorize_url: '/oauth2/authenticate',
        token_url: '/oauth2/access_token'
      }

      uid { raw_info['id'] }

      info do
        {
          first_name: raw_info['firstName'],
          last_name: raw_info['lastName'],
          name: "#{raw_info['firstName']} #{raw_info['lastName']}",
          email: (raw_info['contact'] || {})['email'],
          phone: (raw_info['contact'] || {})['phone'],
          image: raw_info['photo'],
          location: raw_info['homeCity'],
          description: raw_info['bio']
        }
      end

      extra do
        { raw_info: raw_info }
      end

      def request_phase
        options[:authorize_params] = client_params.merge(options[:authorize_params])
        super
      end

      def auth_hash
        OmniAuth::Utils.deep_merge(super,
          client_params.merge(
            {
              grant_type: 'authorization_code'
            }
          ))
      end

      def raw_info
        access_token.options[:mode] = :query
        access_token.options[:param_name] = :oauth_token
        @raw_info ||= access_token.get('https://api.foursquare.com/v2/users/self?v=20140128').parsed['response']['user']
      end

      private

      def client_params
        { client_id: options[:client_id], redirect_uri: callback_url, response_type: 'code' }
      end
    end
  end
end