slack_mattermost_emoji/lib/slack_mattermost_emoji/mattermost_client.rb

require 'dotenv/load'
require 'httparty'
require 'json'

module SlackMattermostEmoji
  class MattermostClient
    def initialize(username:, password:, domain:, download_path: nil, headless: true, log: true)
      @username = username
      @password = password
      @domain = domain
      @download_path = File.expand_path(download_path || './slack-emojis')
      @token = nil

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

    def authenticate
      url = "https://#{@domain}/api/v4/users/login"
      response = HTTParty.post(url, {
        body: JSON.generate({
          login_id: @username,
          password: @password,
        }),
        headers: {
          'Content-Type' => 'application/json'
        }
      })

      if response.code == 401
        raise 'Invalid Mattermost credentials'
      end

      @token = response.headers['token']
    end

    def authenticated?
      !@token.nil?
    end
  end
end