app.rb

require 'sinatra'
require 'json'
require 'httparty'
require 'uri'

set protection: [:json_csrf]
set except: [:json_csrf]

################################################
# Constants and global vars
################################################

COMMAND_IMAGE_MAPPING = {
  'nobody-exists-on-purpose' => 'http://cdn.smosh.com/sites/default/files/2015/12/rickmorty15.jpg',
  'wriggety-wriggety-wrecked-son' => 'http://www.reactiongifs.us/wp-content/uploads/2016/02/riggity_wrecked_son_rick_morty.gif',
  'planning-for-failure' => 'http://2.media.dorkly.cvcdn.com/78/27/5e7374300a84037f2bdbc061f2e69211.jpg',
  'where-are-my-testicles-summer' => 'http://i.imgur.com/xOcpvUM.png',
  'you-pass-butter' => 'https://media.giphy.com/media/Fsn4WJcqwlbtS/giphy.gif',
  'the-answer-is-dont-think-about-it' => 'http://i.imgur.com/L88mBul.jpg',
  'its-getting-weird' => 'https://i.imgur.com/bBLnvGu.jpg',
  'i-just-wanna-die' => 'http://i.imgur.com/CkmvRq8.jpg',
  'wubalubadubdub' => 'http://i.imgur.com/fub72FV.png',
  'im-mr-meseeks-look-at-me' => 'https://ih1.redbubble.net/image.23643868.0357/sticker,375x360.png',
  'peace-among-worlds' => 'https://ih0.redbubble.net/image.92099583.8371/pp,550x550.u1.jpg',
  'theyre-bureaucrats-morty' => 'https://s-media-cache-ak0.pinimg.com/600x315/eb/f5/f1/ebf5f1171db822953076ef15355b17f5.jpg',
  'my-man' => 'https://media.giphy.com/media/qPVzemjFi150Q/giphy.gif',
  'snap-yes' => 'http://i.imgur.com/gd9zPgB.gif',
  'ants-in-my-eyes' => 'http://cdn.smosh.com/sites/default/files/2016/02/rick-morty-ants.jpg',
  'ooh-yeah-can-do' => 'https://media.giphy.com/media/DgLsbUL7SG3kI/giphy.gif',
  'lick-lick-lick-my-balls' => 'https://s-media-cache-ak0.pinimg.com/736x/35/6a/09/356a09cdbd08a2da289e7e1fdd2ae995.jpg',
  'time-to-get-schwifty' => 'https://media.giphy.com/media/bcWtZEuGZhDZm/giphy.gif',
  'dont-hate-the-player' => 'https://media.giphy.com/media/x9DVHBmO750Ji/giphy.gif',
  'im-tiny-rick' => 'https://media.giphy.com/media/2s0ouek7HJmWQ/giphy.gif',
  'i-asked-you-to-do-one-thing' => 'https://media.giphy.com/media/vV5g3lCOzqAhO/giphy.gif',
  'hardest-working-liver' => 'https://media.giphy.com/media/xTiTnkjij69A2S06WY/giphy.gif',
  'dont-even-trip-dawg' => 'https://media.giphy.com/media/ayQ99hp01HFN6/giphy.gif',
  'being-nice' => 'https://media.giphy.com/media/FJovzGlbuoEXm/giphy.gif',
  'not-today' => 'http://i.imgur.com/kxHrcC5.gif'
}.freeze

COMMAND_MEME_MAPPING = {
  'tiny-rick' => {
    'generatorID': 5200542,
    'displayName': 'Tiny Rick'
  },
  'get-schwifty' => {
    'generatorID': 5841203,
    'displayName': 'Rick Sanchez Schwifty'
  },
  'rick-shrug' => {
    'generatorID': 5733231,
    'displayName': 'Rick Sanchez123'
  },
  'rick-scolding-morty' => {
    'generatorID': 6223262,
    'displayName': 'Rick Sanchezzz'
  },
  'way-up-your-butt' => {
    'generatorID': 6063115,
    'displayName': 'Rick Sanchez 2'
  },
  'get-your-shit-together' => {
    'generatorID': 6168409,
    'displayName': 'mortygetyourshittogether'
  },
  'rick-and-morty-couch' => {
    'generatorID': 4875756,
    'displayName': 'Rick and Morty Couch'
  },
  'i-just-got-bored' => {
    'generatorID': 4229669,
    'displayName': 'Rick and Morty - I\'m bored'
  },
  'show-me-what-you-got' => {
    'generatorID': 6873210,
    'displayName': 'Show Me What You GotT'
  },
  'bird-person' => {
    'generatorID': 3687578,
    'displayName': 'Bird Person Rick and Morty'
  },
  'look-morty' => {
    'generatorID': 5932800,
    'displayName': 'Grandpa Rick'
  }
}.freeze

################################################
# Generic routes
################################################

get '/' do
  string_as_json_response 'hello world'
end

get '/oauth' do
  response = HTTParty.post('https://slack.com/api/oauth.access?client_id=' \
    "#{ENV['SLACK_CLIENT_ID']}&client_secret=#{ENV['SLACK_CLIENT_SECRET']}" \
    "&code=#{params['code']}")
  print(response)
  response_body = JSON.parse(response.body)
  if response_body['ok'] == true
    '<h1>You\'ve just installed the YouPassButter Slack bot! Let\'s get riggety
    wrecked!!!</h1>'
  else
    response.body
  end
end

################################################
# Image related routes
################################################

post '/images' do
  if COMMAND_IMAGE_MAPPING.key?(params['text'])
    image_response COMMAND_IMAGE_MAPPING[params['text']]
  else
    images = COMMAND_IMAGE_MAPPING.keys.sort.join(",\n  ")
    string_as_json_response "Cannot find that image #{params['text']}. Full " \
    "list of images:\n  #{images}"
  end
end

post '/images/all' do
  images = COMMAND_IMAGE_MAPPING.keys.sort.join(",\n  ")
  string_as_json_response "Full list of images:\n  #{images}"
end

################################################
# Meme related routes
################################################

post '/memes' do
  text_params = params['text'].split('; ')
  response_url = params['response_url']

  if COMMAND_MEME_MAPPING.key?(text_params[0])
    generator_id = COMMAND_MEME_MAPPING[text_params[0]][:generatorID]
    text0 = URI.encode(text_params[1])
    text1 = URI.encode(text_params[2])
    # generate memes
    puts "I'm about to GET this URL:"
    puts 'http://version1.api.memegenerator.net/' \
      "Instance_Create?username=#{ENV['MEME_GENERATOR_USERNAME']}" \
      "&password=#{ENV['MEME_GENERATOR_PASSWORD']}&languageCode=en&" \
      "generatorID=#{generator_id}&text0=#{text0}&text1=#{text1}"
    response = HTTParty.get('http://version1.api.memegenerator.net/' \
      "Instance_Create?username=#{ENV['MEME_GENERATOR_USERNAME']}" \
      "&password=#{ENV['MEME_GENERATOR_PASSWORD']}&languageCode=en&" \
      "generatorID=#{generator_id}&text0=#{text0}&text1=#{text1}")
    if response['success']
      puts "I'm about to POST to this response_url: #{response_url}"
      puts "I'm going to send this instanceUrl: #{response['result']['instanceUrl']}"
      post_image_to_response_url response_url, \
                                 response['result']['instanceUrl']
      status 200
    else
      string_as_json_response 'Error generating meme'
    end
  else
    memes = COMMAND_MEME_MAPPING.keys.sort.join(",\n  ")
    string_as_json_response "Cannot find that meme #{text_params[0]}. Full " \
    "list of available memes:\n  #{memes}"
  end
end

post '/memes/all' do
  memes = COMMAND_MEME_MAPPING.keys.sort.join(",\n  ")
  string_as_json_response "Full list of memes:\n  #{memes}"
end

################################################
# Utility functions
################################################

def post_image_to_response_url(response_url, image_url)
  message = { attachments: [{ image_url: image_url, fallback: 'Required ' \
    'plain-text summary of the attachment.' }] }
  message = message.to_json
  HTTParty.post(
    response_url,
    body: message,
    headers: { 'Content-Type' => 'application/json' }
  )
end

def image_response(url)
  message = {
    response_type: 'in_channel',
    attachments: [
      { image_url: url }
    ]
  }
  hash_as_json_response(message)
end

def hash_as_json_response(message)
  content_type :json
  message.to_json
end

def string_as_json_response(message)
  content_type :json
  { text: message }.to_json
end