jfederico / greenlight

# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.

#

# Copyright (c) 2018 BigBlueButton Inc. and by respective authors (see below).

#

# This program is free software; you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free Software

# Foundation; either version 3.0 of the License, or (at your option) any later

# version.

#

# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY

# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A

# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.

class HealthCheckController < ApplicationController

  skip_before_action :redirect_to_https, :set_user_domain, :set_user_settings, :maintenance_mode?, :migration_error?,

  :user_locale, :check_admin_password, :check_user_role

  # GET /health_check

  def all

    response = "success"

    @cache_expire = 10.seconds

    begin

      cache_check

      database_check

      email_check

    rescue => e

      response = "Health Check Failure: #{e}"

    end

    render plain: response

  end

  private

  def cache_check

    if Rails.cache.write("__health_check_cache_write__", "true", expires_in: @cache_expire)

      raise "Unable to read from cache" unless Rails.cache.read("__health_check_cache_write__") == "true"

    else

      raise "Unable to write to cache"

    end

  end

  def database_check

    if defined?(ActiveRecord)

      raise "Database not responding" unless ActiveRecord::Migrator.current_version

    end

    raise "Pending migrations" unless ActiveRecord::Migration.check_pending!.nil?

  end

  def email_check

    test_smtp if Rails.configuration.action_mailer.delivery_method == :smtp

  end