PushTokensHelper module - utility for storing data for sending mobile pushes and for sending push notifications. Sending them should be performed on a separate thread.

facebook_login_helper.rb

require 'net/http'
module PushTokensHelper

  def send_pushes(user, data)
    PushToken.where(user: user).to_a.each do |push_token|
      send_push_to_device(push_token, data)
    end
  end


  private
  def send_push_to_device(push_token, data)
    case push_token.platform.downcase
      when 'android'
        send_push_android(push_token.push_token, data)
      when 'ios'
        # Not implemented yet
      when 'windowsphone'
        # Not implemented yet
    end
  end


  def send_push_android(gcm_token, data)
    params = create_data_android(gcm_token, data)
    uri = URI.parse('https://gcm-http.googleapis.com/gcm/send')

    json_headers = {'Authorization' => "key=#{ENV['ANDROID_PUSH_SECRET']}",
                    'Content-Type' => 'application/json'}

    http = Net::HTTP.new(uri.host, uri.port)
    http.use_ssl = true

    http.post(uri.path, params.to_json, json_headers)
  end


  def store_push_token(params, user_id)
    if params[:push_token] && params[:platform] && user_id
      PushToken.store_token(push_token: params[:push_token], platform: params[:platform], user_id: user_id)
    end
  end


  private
  def create_data_android(gcm_token, data)
    {to: gcm_token, data: data}
  end

end

push_token.rb

class PushToken < ActiveRecord::Base

  belongs_to :user


  def self.store_token(push_token:, platform:, user_id:)
    PushToken.find_or_initialize_by(
        platform: platform,
        push_token: push_token
    )
        .update(
            user_id: user_id
        )
  end
end