app.rb

require 'sinatra'
require 'json'
require 'fuzzy_match'

class RequestHandler

  attr_reader :params

  def initialize(params)
    @params = params
  end

  def get_emojis
    words = params['text'].split(' ')
    matcher = FuzzyMatch.new(EMOJIS)
    emojis = words.map do |word|
      ":#{matcher.find(word)}:"
    end
    emojis.join(' ')
  end

end

post '/' do
  raise unless params['token'] == ENV['SLACK_AUTH_TOKEN']
  content_type :json
  {
    response_type: 'in_channel',
    text: RequestHandler.new(params).get_emojis
  }.to_json
end

EMOJIS = %w(
  bowtie
  smile
  simple_smile
  laughing
  blush
  smiley
  relaxed
  smirk
  heart_eyes
  kissing_heart
  kissing_closed_eyes
  flushed
  relieved
  satisfied
  grin
  wink
  stuck_out_tongue_winking_eye
  stuck_out_tongue_closed_eyes
  grinning
  kissing
  kissing_smiling_eyes
  stuck_out_tongue
  sleeping
  worried
  frowning
  anguished
  open_mouth
  grimacing
  confused
  hushed
  expressionless
  unamused
  sweat_smile
  sweat
  disappointed_relieved
  weary
  pensive
  disappointed
  confounded
  fearful
  cold_sweat
  persevere
  cry
  sob
  joy
  astonished
  scream
  neckbeard
  tired_face
  angry
  rage
  triumph
  sleepy
  yum
  mask
  sunglasses
  dizzy_face
  imp
  smiling_imp
  neutral_face
  no_mouth
  innocent
  alien
  yellow_heart
  blue_heart
  purple_heart
  heart
  green_heart
  broken_heart
  heartbeat
  heartpulse
  two_hearts
  revolving_hearts
  cupid
  sparkling_heart
  sparkles
  star
  star2
  dizzy
  boom
  collision
  anger
  exclamation
  question
  grey_exclamation
  grey_question
  zzz
  dash
  sweat_drops
  notes
  musical_note
  fire
  hankey
  poop
  shit
  +1
  thumbsup
  -1
  thumbsdown
  ok_hand
  punch
  facepunch
  fist
  v
  wave
  hand
  raised_hand
  open_hands
  point_up
  point_down
  point_left
  point_right
  raised_hands
  pray
  point_up_2
  clap
  muscle
  metal
  fu
  runner
  running
  couple
  family
  two_men_holding_hands
  two_women_holding_hands
  dancer
  dancers
  ok_woman
  no_good
  information_desk_person
  raising_hand
  bride_with_veil
  person_with_pouting_face
  person_frowning
  bow
  couplekiss
  couple_with_heart
  massage
  haircut
  nail_care
  boy
  girl
  woman
  man
  baby
  older_woman
  older_man
  person_with_blond_hair
  man_with_gua_pi_mao
  man_with_turban
  construction_worker
  cop
  angel
  princess
  smiley_cat
  smile_cat
  heart_eyes_cat
  kissing_cat
  smirk_cat
  scream_cat
  crying_cat_face
  joy_cat
  pouting_cat
  japanese_ogre
  japanese_goblin
  see_no_evil
  hear_no_evil
  speak_no_evil
  guardsman
  skull
  feet
  lips
  kiss
  droplet
  ear
  eyes
  nose
  tongue
  love_letter
  bust_in_silhouette
  busts_in_silhouette
  speech_balloon
  thought_balloon
  feelsgood
  finnadie
  goberserk
  godmode
  hurtrealbad
  rage1
  rage2
  rage3
  rage4
  suspect
  trollface
  sunny
  umbrella
  cloud
  snowflake
  snowman
  zap
  cyclone
  foggy
  ocean
  cat
  dog
  mouse
  hamster
  rabbit
  wolf
  frog
  tiger
  koala
  bear
  pig
  pig_nose
  cow
  boar
  monkey_face
  monkey
  horse
  racehorse
  camel
  sheep
  elephant
  panda_face
  snake
  bird
  baby_chick
  hatched_chick
  hatching_chick
  chicken
  penguin
  turtle
  bug
  honeybee
  ant
  beetle
  snail
  octopus
  tropical_fish
  fish
  whale
  whale2
  dolphin
  cow2
  ram
  rat
  water_buffalo
  tiger2
  rabbit2
  dragon
  goat
  rooster
  dog2
  pig2
  mouse2
  ox
  dragon_face
  blowfish
  crocodile
  dromedary_camel
  leopard
  cat2
  poodle
  paw_prints
  bouquet
  cherry_blossom
  tulip
  four_leaf_clover
  rose
  sunflower
  hibiscus
  maple_leaf
  leaves
  fallen_leaf
  herb
  mushroom
  cactus
  palm_tree
  evergreen_tree
  deciduous_tree
  chestnut
  seedling
  blossom
  ear_of_rice
  shell
  globe_with_meridians
  sun_with_face
  full_moon_with_face
  new_moon_with_face
  new_moon
  waxing_crescent_moon
  first_quarter_moon
  waxing_gibbous_moon
  full_moon
  waning_gibbous_moon
  last_quarter_moon
  waning_crescent_moon
  last_quarter_moon_with_face
  first_quarter_moon_with_face
  crescent_moon
  earth_africa
  earth_americas
  earth_asia
  volcano
  milky_way
  partly_sunny
  octocat
  squirrel
  bamboo
  gift_heart
  dolls
  school_satchel
  mortar_board
  flags
  fireworks
  sparkler
  wind_chime
  rice_scene
  jack_o_lantern
  ghost
  santa
  christmas_tree
  gift
  bell
  no_bell
  tanabata_tree
  tada
  confetti_ball
  balloon
  crystal_ball
  cd
  dvd
  floppy_disk
  camera
  video_camera
  movie_camera
  computer
  tv
  iphone
  phone
  telephone
  telephone_receiver
  pager
  fax
  minidisc
  vhs
  sound
  speaker
  mute
  loudspeaker
  mega
  hourglass
  hourglass_flowing_sand
  alarm_clock
  watch
  radio
  satellite
  loop
  mag
  mag_right
  unlock
  lock
  lock_with_ink_pen
  closed_lock_with_key
  key
  bulb
  flashlight
  high_brightness
  low_brightness
  electric_plug
  battery
  calling
  email
  mailbox
  postbox
  bath
  bathtub
  shower
  toilet
  wrench
  nut_and_bolt
  hammer
  seat
  moneybag
  yen
  dollar
  pound
  euro
  credit_card
  money_with_wings
  e-mail
  inbox_tray
  outbox_tray
  envelope
  incoming_envelope
  postal_horn
  mailbox_closed
  mailbox_with_mail
  mailbox_with_no_mail
  package
  door
  smoking
  bomb
  gun
  hocho
  pill
  syringe
  page_facing_up
  page_with_curl
  bookmark_tabs
  bar_chart
  chart_with_upwards_trend
  chart_with_downwards_trend
  scroll
  clipboard
  calendar
  date
  card_index
  file_folder
  open_file_folder
  scissors
  pushpin
  paperclip
  black_nib
  pencil2
  straight_ruler
  triangular_ruler
  closed_book
  green_book
  blue_book
  orange_book
  notebook
  notebook_with_decorative_cover
  ledger
  books
  bookmark
  name_badge
  microscope
  telescope
  newspaper
  football
  basketball
  soccer
  baseball
  tennis
  8ball
  rugby_football
  bowling
  golf
  mountain_bicyclist
  bicyclist
  horse_racing
  snowboarder
  swimmer
  surfer
  ski
  spades
  hearts
  clubs
  diamonds
  gem
  ring
  trophy
  musical_score
  musical_keyboard
  violin
  space_invader
  video_game
  black_joker
  flower_playing_cards
  game_die
  dart
  mahjong
  clapper
  memo
  pencil
  book
  art
  microphone
  headphones
  trumpet
  saxophone
  guitar
  shoe
  sandal
  high_heel
  lipstick
  boot
  shirt
  tshirt
  necktie
  womans_clothes
  dress
  running_shirt_with_sash
  jeans
  kimono
  bikini
  ribbon
  tophat
  crown
  womans_hat
  mans_shoe
  closed_umbrella
  briefcase
  handbag
  pouch
  purse
  eyeglasses
  fishing_pole_and_fish
  coffee
  tea
  sake
  baby_bottle
  beer
  beers
  cocktail
  tropical_drink
  wine_glass
  fork_and_knife
  pizza
  hamburger
  fries
  poultry_leg
  meat_on_bone
  spaghetti
  curry
  fried_shrimp
  bento
  sushi
  fish_cake
  rice_ball
  rice_cracker
  rice
  ramen
  stew
  oden
  dango
  egg
  bread
  doughnut
  custard
  icecream
  ice_cream
  shaved_ice
  birthday
  cake
  cookie
  chocolate_bar
  candy
  lollipop
  honey_pot
  apple
  green_apple
  tangerine
  lemon
  cherries
  grapes
  watermelon
  strawberry
  peach
  melon
  banana
  pear
  pineapple
  sweet_potato
  eggplant
  tomato
  corn
  house
  house_with_garden
  school
  office
  post_office
  hospital
  bank
  convenience_store
  love_hotel
  hotel
  wedding
  church
  department_store
  european_post_office
  city_sunrise
  city_sunset
  japanese_castle
  european_castle
  tent
  factory
  tokyo_tower
  japan
  mount_fuji
  sunrise_over_mountains
  sunrise
  stars
  statue_of_liberty
  bridge_at_night
  carousel_horse
  rainbow
  ferris_wheel
  fountain
  roller_coaster
  ship
  speedboat
  boat
  sailboat
  rowboat
  anchor
  rocket
  airplane
  helicopter
  steam_locomotive
  tram
  mountain_railway
  bike
  aerial_tramway
  suspension_railway
  mountain_cableway
  tractor
  blue_car
  oncoming_automobile
  car
  red_car
  taxi
  oncoming_taxi
  articulated_lorry
  bus
  oncoming_bus
  rotating_light
  police_car
  oncoming_police_car
  fire_engine
  ambulance
  minibus
  truck
  train
  station
  train2
  bullettrain_front
  bullettrain_side
  light_rail
  monorail
  railway_car
  trolleybus
  ticket
  fuelpump
  vertical_traffic_light
  traffic_light
  warning
  construction
  beginner
  atm
  slot_machine
  busstop
  barber
  hotsprings
  checkered_flag
  crossed_flags
  izakaya_lantern
  moyai
  circus_tent
  performing_arts
  round_pushpin
  triangular_flag_on_post
  jp
  kr
  cn
  us
  fr
  es
  it
  ru
  gb
  uk
  de
  one
  two
  three
  four
  five
  six
  seven
  eight
  nine
  keycap_ten
  1234
  zero
  hash
  symbols
  arrow_backward
  arrow_down
  arrow_forward
  arrow_left
  capital_abcd
  abcd
  abc
  arrow_lower_left
  arrow_lower_right
  arrow_right
  arrow_up
  arrow_upper_left
  arrow_upper_right
  arrow_double_down
  arrow_double_up
  arrow_down_small
  arrow_heading_down
  arrow_heading_up
  leftwards_arrow_with_hook
  arrow_right_hook
  left_right_arrow
  arrow_up_down
  arrow_up_small
  arrows_clockwise
  arrows_counterclockwise
  rewind
  fast_forward
  information_source
  ok
  twisted_rightwards_arrows
  repeat
  repeat_one
  new
  top
  up
  cool
  free
  ng
  cinema
  koko
  signal_strength
  u5272
  u5408
  u55b6
  u6307
  u6708
  u6709
  u6e80
  u7121
  u7533
  u7a7a
  u7981
  sa
  restroom
  mens
  womens
  baby_symbol
  no_smoking
  parking
  wheelchair
  metro
  baggage_claim
  accept
  wc
  potable_water
  put_litter_in_its_place
  secret
  congratulations
  m
  passport_control
  left_luggage
  customs
  ideograph_advantage
  cl
  sos
  id
  no_entry_sign
  underage
  no_mobile_phones
  do_not_litter
  non-potable_water
  no_bicycles
  no_pedestrians
  children_crossing
  no_entry
  eight_spoked_asterisk
  sparkle
  eight_pointed_black_star
  heart_decoration
  vs
  vibration_mode
  mobile_phone_off
  chart
  currency_exchange
  aries
  taurus
  gemini
  cancer
  leo
  virgo
  libra
  scorpius
  sagittarius
  capricorn
  aquarius
  pisces
  ophiuchus
  six_pointed_star
  negative_squared_cross_mark
  a
  b
  ab
  o2
  diamond_shape_with_a_dot_inside
  recycle
  end
  back
  on
  soon
  clock1
  clock130
  clock10
  clock1030
  clock11
  clock1130
  clock12
  clock1230
  clock2
  clock230
  clock3
  clock330
  clock4
  clock430
  clock5
  clock530
  clock6
  clock630
  clock7
  clock730
  clock8
  clock830
  clock9
  clock930
  heavy_dollar_sign
  copyright
  registered
  tm
  x
  heavy_exclamation_mark
  bangbang
  interrobang
  o
  heavy_multiplication_x
  heavy_plus_sign
  heavy_minus_sign
  heavy_division_sign
  white_flower
  100
  heavy_check_mark
  ballot_box_with_check
  radio_button
  link
  curly_loop
  wavy_dash
  part_alternation_mark
  trident
  black_small_square
  white_small_square
  black_medium_small_square
  white_medium_small_square
  black_medium_square
  white_medium_square
  black_large_square
  white_large_square
  white_check_mark
  black_square_button
  white_square_button
  black_circle
  white_circle
  red_circle
  large_blue_circle
  large_blue_diamond
  large_orange_diamond
  small_blue_diamond
  small_orange_diamond
  small_red_triangle
  small_red_triangle_down
  shipit
)