API endpoints setup

01_update_push_subscription_api.rb

# In your api call endpoint for update_push_subscription
# I use Grape, but the logic is similar in RailsAPI

resource :update_push_subscription do
  desc "Update the user mobil push notification registration on Amazon SNS"
  params do
    requires :push_platform, type: String, desc: "Push Service Platform", values: %w(apns gcm)
    requires :device_token, type: String, desc: "Device Token for Mobile Push Notification"
  end
  post do
    # you'll need to do some pre processing to get the valid @user before getting into here
    authenticate!

    existed_amazon_sns_infos = AmazonSnsInfo.where(device_token: params[:device_token], platform: params[:push_platform])

    existed_amazon_sns_infos.destroy_all

    amazon_sns_info = AmazonSnsInfo.create(user: @user, device_token: params[:device_token], platform: params[:push_platform])

    error!("Update Amazon SNS Subscription Failed", 403) unless amazon_sns_info.update_topic_subscription

    # delete parse installation with provided device_token
    ParseInstallationWrapper.check_and_unregister(device_token: amazon_sns_info.device_token, email: @user.email)

    present :amazon_sns_info, amazon_sns_info.reload, with: API::V2::Entities::EntityAmazonSnsInfo
  end
end

02_logout_api.rb

# In your api call endpoint for logout
# I use Grape, but the logic is similar in RailsAPI

resource :logout do
  desc "Logout user and unsubscribe the push notification"
  params do
    requires :push_platform, type: String, desc: "Push Service Platform", values: %w(apns gcm)
    requires :device_token, type: String, desc: "Device Token for Mobile Push Notification"
  end
  post do
    # you'll need to do some pre processing to get the valid @user before getting into here
    authenticate!

    amazon_sns_info = AmazonSnsInfo.where(user: @user, device_token: params[:device_token], platform: params[:push_platform]).last

    if amazon_sns_info.present?
      error!("Update Amazon SNS Subscription Failed", 403) unless amazon_sns_info.unsubscribe_topic_subscriptions

      present :amazon_sns_info, amazon_sns_info.reload, with: API::V2::Entities::EntityAmazonSnsInfo
    end
  end
end