Slack Notification in ruby

slack.rb

require 'net/http'

class Slack
  attr_accessor :message, :channel, :status

  BASE_URL = 'your base url goes here'

  HEX_COLORS = {
    success: '#7CD197',
    error: '#BB0000',
    warning: '#9F6000',
    info: '#428bca'
  }

  def initialize(message, channel, status)
    self.message = message
    self.channel = channel
    self.status = status
  end

  def self.notify(message: nil, channel: 'notification', status: :success)
    @slack = self.new(message, channel, status)
    uri = URI(@slack.send("#{channel}_url"))
    https = Net::HTTP.new uri.host, uri.port
    https.use_ssl = true
    https.post2 uri.path, @slack.send(:payload), 'Content-Type' => 'application/json'
  end

  private

  def payload
    {
      attachments: [
        {
          author_name: author,
          color: HEX_COLORS[status],
          title: @message,
          ts: Time.now.to_i
        }
      ]
    }.to_json
  end

  def author
    ENV['GIT_AUTHOR_NAME'] || `git config user.name`.chomp
  end

  # channels url
  def notification_url
    "#{BASE_URL}channel_key goes here"
  end
end