index.rb

# frozen_string_literal: true

require 'sinatra'
require 'oauth2'
require 'json'
require 'httparty'
require 'mini_magick'

$client = OAuth2::Client.new(ENV['CLIENT_ID'],
                              ENV['CLIENT_SECRET'],
                              site: 'https://us.battle.net')
$token = nil

def token
  $token = $client.client_credentials.get_token if !$token || $token.expired?

  $token.token
end

def classes
  HTTParty.get('https://us.api.blizzard.com/wow/data/character/classes',
               query: { "locale": 'en_US' },
               headers: { "Authorization": "Bearer #{token}" })['classes']
          .each_with_object({}) do |c, h|
    h[c['id']] = c['name']
  end
end

def get_character(name, realm)
  HTTParty.get("https://us.api.blizzard.com/wow/character/#{realm.downcase}/#{name.downcase}",
               query: { "fields": 'guild,items',
                        "locale": 'en_US' },
               headers: { "Authorization": "Bearer #{token}" })
end

def get_image(character)
  url = "https://render-us.worldofwarcraft.com/character/#{character['thumbnail'].sub('-avatar.jpg', '-inset.jpg')}"
  avatar = MiniMagick::Image.open(url)
  bg = MiniMagick::Image.open("./images/background-#{character['faction']}.png")
  empty = MiniMagick::Image.open('./empty.png')

  sig = empty.composite(avatar) do |c|
    c.geometry('+2+2')
  end.composite(bg)

  sig.combine_options do |i|
    i.font('./fonts/merriweather/Merriweather-Bold.ttf')
    i.pointsize(30)
    i.fill('#deaa00')
    i.draw("text 220,40 '#{character['name']}'")
    i.font('./fonts/merriweather/Merriweather-Regular.ttf')
    i.pointsize(12)
    i.fill('#888888')
    i.draw("text 220,65  'Level #{character['level']} #{character['class_name']} #{character['guild'] ? 'of <' + character['guild']['name'] + '> ' : ''}on #{character['realm']}'")
    i.draw("text 220,85  'Item Level: #{character['items']['averageItemLevel']} (#{character['items']['averageItemLevelEquipped']})'")
    i.draw("text 220,105 'Achievement Points: #{character['achievementPoints']}'")
  end.to_blob
end

def get_signature(name, realm)
  character = get_character(name, realm)
  character['class_name'] = classes[character['class']]
  get_image(character)
end

get '/signature' do
  content_type 'image/png'
  get_signature(params[:characterName], params[:realmName])
end