discourse-chat-integration/lib/discourse_chat/provider.rb

module DiscourseChat
  class ProviderError < StandardError
    attr_accessor :info

    def initialize(message = nil, info: nil)
      super(message)
      self.info = info.nil? ? {} : info
    end
  end

  module Provider
    def self.providers
      constants.select do |constant|
        constant.to_s =~ /Provider$/
      end.map(&method(:const_get))
    end

    def self.enabled_providers
      self.providers.select do |provider|
        self.is_enabled(provider)
      end
    end

    def self.get_by_name(name)
      self.providers.find{|p| p::PROVIDER_NAME == name}
    end

    def self.is_enabled(provider)
      if defined? provider::PROVIDER_ENABLED_SETTING 
        SiteSetting.send(provider::PROVIDER_ENABLED_SETTING)
      else
        false
      end
    end

  end
end

require_relative "provider/slack/slack_provider.rb"
require_relative "provider/telegram/telegram_provider.rb"