#
# Notice: This file was extracted from https://github.com/elm-city-craftworks/md_emoji
#
##
## Copyright (c) 2011 Jordan Byron
##
## Permission is hereby granted, free of charge, to any person obtaining a copy of this software
## and associated documentation files (the "Software"), to deal in the Software without restriction,
## including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
## and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
## subject to the following conditions:
##
## The above copyright notice and this permission notice shall be included in all copies or substantial
## portions of the Software.
##
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
## NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
## IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
## WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH
## THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

module MdEmoji
  EMOJI = %w{+1 -1 0 1 100 109 1234 2 3 4 5 6 7 8 8ball 9 a ab
  abc abcd accept aerial_tramway airplane alarm_clock alien ambulance
  anchor angel anger angry anguished ant apple aquarius aries arrow_backward
  arrow_double_down arrow_double_up arrow_down arrow_down_small arrow_forward
  arrow_heading_down arrow_heading_up arrow_left arrow_lower_left arrow_lower_right
  arrow_right arrow_right_hook arrow_up arrow_up_down arrow_up_small arrow_upper_left
  arrow_upper_right arrows_clockwise arrows_counterclockwise art articulated_lorry
  astonished atm b baby baby_bottle baby_chick baby_symbol baggage_claim balloon
  ballot_box_with_check bamboo banana bangbang bank bar_chart barber baseball
  basketball bath bathtub battery bear beer beers beetle beginner bell bento
  bicyclist bike bikini bird birthday black_circle black_joker black_nib black_square
  black_square_button blossom blowfish blue_book blue_car blue_heart blush boar
  boat bomb book bookmark bookmark_tabs books boom boot bouquet bow bowling bowtie
  boy bread bride_with_veil bridge_at_night briefcase broken_heart bug bulb bullettrain_front
  bullettrain_side bus busstop bust_in_silhouette busts_in_silhouette cactus cake calendar
  calling camel camera cancer candy capital_abcd capricorn car card_index carousel_horse
  cat cat2 cd chart chart_with_downwards_trend chart_with_upwards_trend checkered_flag
  cherries cherry_blossom chestnut chicken children_crossing chocolate_bar christmas_tree
  church cinema circus_tent city_sunrise city_sunset cl clap clapper clipboard clock1 clock10
  clock1030 clock11 clock1130 clock12 clock1230 clock130 clock2 clock230 clock3 clock330
  clock4 clock430 clock5 clock530 clock6 clock630 clock7 clock730 clock8 clock830 clock9
  clock930 closed_book closed_lock_with_key closed_umbrella cloud clubs cn cocktail coffee
  cold_sweat collision computer confetti_ball confounded confused congratulations construction
  construction_worker convenience_store cookie cool cop copyright corn couple couple_with_heart
  couplekiss cow cow2 credit_card crocodile crossed_flags crown cry crying_cat_face crystal_ball
  cupid curly_loop currency_exchange curry custard customs cyclone dancer dancers dango dart dash
  date de deciduous_tree department_store diamond_shape_with_a_dot_inside diamonds disappointed
  disappointed_relieved dizzy dizzy_face do_not_litter dog dog2 dollar dolls dolphin door doughnut
  dragon dragon_face dress dromedary_camel droplet dvd e-mail ear ear_of_rice earth_africa
  earth_americas earth_asia egg eggplant egplant eight eight_pointed_black_star eight_spoked_asterisk
  electric_plug elephant email end envelope es euro european_castle european_post_office
  evergreen_tree exclamation expressionless eyeglasses eyes facepunch factory fallen_leaf family
  fast_forward fax fearful feelsgood feet ferris_wheel file_folder finnadie fire fire_engine
  fireworks first_quarter_moon first_quarter_moon_with_face fish fish_cake
  fishing_pole_and_fish fist five flags flashlight floppy_disk flower_playing_cards
  flushed foggy football fork_and_knife fountain four four_leaf_clover fr free fried_shrimp
  fries frog frowning fu fuelpump full_moon full_moon_with_face game_die gb gem gemini ghost
  gift gift_heart girl globe_with_meridians goat goberserk godmode golf grapes green_apple
  green_book green_heart grey_exclamation grey_question grimacing grin grinning guardsman
  guitar gun haircut hamburger hammer hamster hand handbag hankey hash hatched_chick hatching_chick
  headphones hear_no_evil heart heart_decoration heart_eyes heart_eyes_cat heartbeat heartpulse
  hearts heavy_check_mark heavy_division_sign heavy_dollar_sign heavy_exclamation_mark
  heavy_minus_sign heavy_multiplication_x heavy_plus_sign helicopter herb hibiscus high_brightness
  high_heel hocho honey_pot honeybee horse horse_racing hospital hotel hotsprings hourglass
  hourglass_flowing_sand house house_with_garden hurtrealbad hushed ice_cream icecream id ideograph_advantage imp
  inbox_tray incoming_envelope information_desk_person information_source innocent interrobang
  iphone it izakaya_lantern jack_o_lantern japan japanese_castle japanese_goblin japanese_ogre
  jeans joy joy_cat jp key keycap_ten kimono kiss kissing kissing_cat kissing_closed_eyes kissing_face
  kissing_heart kissing_smiling_eyes koala koko kr large_blue_circle large_blue_diamond
  large_orange_diamond last_quarter_moon last_quarter_moon_with_face laughing leaves ledger
  left_luggage left_right_arrow leftwards_arrow_with_hook lemon leo leopard libra light_rail
  link lips lipstick lock lock_with_ink_pen lollipop loop loudspeaker love_hotel love_letter
  low_brightness m mag mag_right mahjong mailbox mailbox_closed mailbox_with_mail mailbox_with_no_mail
  man man_with_gua_pi_mao man_with_turban mans_shoe maple_leaf mask massage meat_on_bone mega melon
  memo mens metal metro microphone microscope milky_way minibus minidisc mobile_phone_off money_with_wings
  moneybag monkey monkey_face monorail moon mortar_board mount_fuji mountain_bicyclist mountain_cableway
  mountain_railway mouse mouse2 movie_camera moyai muscle mushroom musical_keyboard musical_note
  musical_score mute nail_care name_badge neckbeard necktie negative_squared_cross_mark neutral_face
  new new_moon new_moon_with_face newspaper ng nine no_bell no_bicycles no_entry no_entry_sign no_good
  no_mobile_phones no_mouth no_pedestrians no_smoking non-potable_water nose notebook
  notebook_with_decorative_cover notes nut_and_bolt o o2 ocean octocat octopus oden office ok ok_hand
  ok_woman older_man older_woman on oncoming_automobile oncoming_bus oncoming_police_car oncoming_taxi
  one open_file_folder open_hands open_mouth ophiuchus orange_book outbox_tray ox page_facing_up
  page_with_curl pager palm_tree panda_face paperclip parking part_alternation_mark partly_sunny
  passport_control paw_prints peach pear pencil pencil2 penguin pensive performing_arts persevere
  person_frowning person_with_blond_hair person_with_pouting_face phone pig pig2 pig_nose pill
  pineapple pisces pizza plus1 point_down point_left point_right point_up point_up_2 police_car
  poodle poop post_office postal_horn postbox potable_water pouch poultry_leg pound pouting_cat
  pray princess punch purple_heart purse pushpin put_litter_in_its_place question rabbit rabbit2
  racehorse radio radio_button rage rage1 rage2 rage3 rage4 railway_car rainbow raised_hand raised_hands
  raising_hand ram ramen rat recycle red_car red_circle registered relaxed relieved repeat repeat_one
  restroom revolving_hearts rewind ribbon rice rice_ball rice_cracker rice_scene ring rocket
  roller_coaster rooster rose rotating_light round_pushpin rowboat ru rugby_football runner running
  running_shirt_with_sash sa sagittarius sailboat sake sandal santa satellite satisfied saxophone
  school school_satchel scissors scorpius scream scream_cat scroll seat secret see_no_evil
  seedling seven shaved_ice sheep shell ship shipit shirt shit shoe shower signal_strength six
  six_pointed_star ski skull sleeping sleepy slot_machine small_blue_diamond small_orange_diamond
  small_red_triangle small_red_triangle_down smile smile_cat smiley smiley_cat smiling_imp smirk
  smirk_cat smoking snail snake snowboarder snowflake snowman sob soccer soon sos sound space_invader
  spades spaghetti sparkler sparkles sparkling_heart speak_no_evil speaker speech_balloon speedboat
  squirrel star star2 stars station statue_of_liberty steam_locomotive stew straight_ruler strawberry
  stuck_out_tongue stuck_out_tongue_closed_eyes stuck_out_tongue_winking_eye sun_with_face sunflower
  sunglasses sunny sunrise sunrise_over_mountains surfer sushi suspect suspension_railway sweat
  sweat_drops sweat_smile sweet_potato swimmer symbols syringe tada tanabata_tree tangerine taurus
  taxi tea telephone telephone_receiver telescope tennis tent thought_balloon three thumbsdown
  thumbsup ticket tiger tiger2 tired_face tm toilet tokyo_tower tomato tongue tongue2 top tophat
  tractor traffic_light train train2 tram triangular_flag_on_post triangular_ruler trident triumph
  trolleybus trollface trophy tropical_drink tropical_fish truck trumpet tshirt tulip turtle tv
  twisted_rightwards_arrows two two_hearts two_men_holding_hands two_women_holding_hands
  u5272 u5408 u55b6 u6307 u6708 u6709 u6e80 u7121 u7533 u7981 u7a7a uk umbrella unamused
  underage unlock up us v vertical_traffic_light vhs vibration_mode video_camera video_game
  violin virgo volcano vs walking waning_crescent_moon waning_gibbous_moon warning watch
  water_buffalo watermelon wave wavy_dash waxing_crescent_moon waxing_gibbous_moon wc weary
  wedding whale whale2 wheelchair white_check_mark white_circle white_flower white_square
  white_square_button wind_chime wine_glass wink wink2 wolf woman womans_clothes womans_hat
  womens worried wrench x yellow_heart yen yum zap zero zzz}
end


module MdEmoji
  class Render < Redcarpet::Render::HTML
    def initialize(options={})
      @options = options.merge(:no_intra_emphasis => true)
      super @options
    end

    def paragraph(text)
      text.gsub!("\n", "<br>\n") if @options[:hard_wrap]

      "<p>#{replace_emoji(text)}</p>\n"
    end

    def list_item(text, list_type)
      "<li>#{replace_emoji(text)}</li>"
    end

    # Replaces valid emoji characters, ie :smile:, with img tags
    #
    # Valid emoji charaters are listed in +MdEmoji::EMOJI+
    def replace_emoji(text)
      text.gsub(/:([^\s:])+:/) do |emoji|

        emoji_code = emoji #.gsub("|", "_")
        emoji      = emoji_code.gsub(":", "")

        if MdEmoji::EMOJI.include?(emoji)
          file_name    = "#{emoji.gsub('+', 'plus')}.png"
          default_size = %{height="20" width="20"}

          %{<img src="/assets/emojis/#{file_name}" class="emoji" } +
            %{title="#{emoji_code}" alt="#{emoji_code}" #{default_size}>}
        else
          emoji_code
        end
      end
    end

    private

    # Returns +true+ if emoji are present in +text+, otherwise returns +false+
    def include_emoji?(text)
      text && text[/:\S+:/]
    end
  end
end