application.rb

# frozen_string_literal: true

require_relative "boot"

require "rails/all"
require "csv"

# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)

ENV["FAILBOT_BACKEND"] ||= "memory"

# report exceptions using Failbot
require "failbot_rails"
FailbotRails.setup("classroom#{'-staging' if Rails.env.staging?}")

module GitHubClassroom
  class Application < Rails::Application
    # Initialize configuration defaults for originally generated Rails version.
    config.load_defaults 5.1

    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.

    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
    config.i18n.load_path += Dir[Rails.root.join("config", "locales", "**", "*.{rb,yml}")]

    # Available locales
    I18n.available_locales = [:en]

    # Append directories to autoload paths
    config.eager_load_paths += %w[lib].map { |path| Rails.root.join(path).to_s }

    # Configure the generators
    config.generators do |g|
      g.test_framework :rspec, fixture: false
    end

    # GC Profiler for analytics
    GC::Profiler.enable

    # Use SideKiq for background jobs
    config.active_job.queue_adapter = :sidekiq

    # Health checks endpoint for monitoring
    if ENV["PINGLISH_ENABLED"] == "true"

      # rubocop:disable Metrics/BlockLength
      config.middleware.use Pinglish do |ping|
        ping.check :db do
          ActiveRecord::Base.connection.tables.size
          "ok"
        end

        ping.check :memcached do
          Rails.cache.dalli.checkout.alive!
          "ok"
        end

        ping.check :redis do
          Sidekiq.redis(&:ping)
          "ok"
        end

        ping.check :github, timeout: 5 do
          uri = URI("https://www.githubstatus.com/api/v2/components.json")
          status_components = JSON.parse(Net::HTTP.get(uri))["components"]
          raise "GitHub status format is invalid!" if status_components.blank?

          github_status_api_id = "brv1bkgrwx7q"
          api_component = status_components.find do |component|
            component["id"] == github_status_api_id
          end
          raise "GitHub API status ID (#{github_status_api_id}) cannot be found!" if api_component.blank?

          api_status = api_component["status"]
          raise "GitHub API status is #{status}" if api_status != "operational"

          "ok"
        end

        ping.check :github_api, timeout: 5 do
          client = GitHubClassroom.github_client
          rate_limit = client.rate_limit
          status = client.last_response.status
          raise "GitHub API status is #{status}" if status != 200

          if rate_limit.remaining < 10
            raise "Low rate limit. #{rate_limit.remaining} remaining, resets in #{rate_limit.resets_in}"
          end

          "ok"
        end
      end
      # rubocop:enable Metrics/BlockLength
    end
  end
end