slack_mattermost_emoji/lib/slack_mattermost_emoji/slack_client.rb

require 'selenium-webdriver'

module SlackMattermostEmoji
  class SlackClient
    def initialize(username:, password:, domain:)
      @username = username
      @password = password
      @domain = domain
      @authenticated = false

      options = Selenium::WebDriver::Chrome::Options.new
      options.headless!
      @driver = Selenium::WebDriver.for :chrome, options: options


      if [@username, @password, @domain].any? { |el| el.nil? || el.empty? }
        raise 'Slack username, password, and domain are all required'
      end
    end

    def authenticate
      @driver.navigate.to "https://#{@domain}"
      @driver.find_element(name: 'email').send_keys(@username)
      @driver.find_element(name: 'password').send_keys(@password)
      @driver.find_element(id: 'signin_btn').click

      begin
        @driver.find_element(css: 'p.alert.alert_error')
        raise 'Invalid credentials'
      rescue Selenium::WebDriver::Error::NoSuchElementError
        nil
      end

      @authenticated = true
    end

    def authenticated?
      @authenticated
    end
  end
end