/*
 * Copyright (c) 2010-2016, b3log.org & hacpai.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.b3log.solo.util;

import com.vdurmont.emoji.EmojiParser;
import java.util.regex.Pattern;
import org.b3log.latke.Latkes;

/**
 * Emotions utilities.
 *
 * @author <a href="http://88250.b3log.org">Liang Ding</a>
 * @version 1.0.0.0, May 10, 2016
 * @since 1.4.0
 */
public final class Emotions {

    /**
     * Emoji pattern.
     */
    public static final Pattern EMOJI_PATTERN = Pattern.compile(":.+:");

    /**
     * Emoji list.
     */
    private static final String[] EMOJIS = {
        "+1",
        "-1",
        "100",
        "1234",
        "8ball",
        "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",
        "back",
        "baggage_claim",
        "balloon",
        "ballot_box_with_check",
        "bamboo",
        "banana",
        "bangbang",
        "bank",
        "bar_chart",
        "barber",
        "baseball",
        "basketball",
        "bath",
        "bathtub",
        "battery",
        "bear",
        "bee",
        "beer",
        "beers",
        "beetle",
        "beginner",
        "bell",
        "bento",
        "bicyclist",
        "bike",
        "bikini",
        "bird",
        "birthday",
        "black_circle",
        "black_joker",
        "black_medium_small_square",
        "black_medium_square",
        "black_nib",
        "black_small_square",
        "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",
        "crescent_moon",
        "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",
        "donut",
        "door",
        "doughnut",
        "dragon",
        "dragon_face",
        "dress",
        "dromedary_camel",
        "droplet",
        "dvd",
        "e-mail",
        "ear",
        "ear_of_rice",
        "earth_africa",
        "earth_americas",
        "earth_asia",
        "egg",
        "eggplant",
        "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",
        "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",
        "package",
        "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",
        "sparkle",
        "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",
        "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_large_square",
        "white_medium_small_square",
        "white_medium_square",
        "white_small_square",
        "white_square_button",
        "wind_chime",
        "wine_glass",
        "wink",
        "wolf",
        "woman",
        "womans_clothes",
        "womans_hat",
        "womens",
        "worried",
        "wrench",
        "x",
        "yellow_heart",
        "yen",
        "yum",
        "zap",
        "zero",
        "zzz"
    };

    /**
     * Replaces the emoji's unicode occurrences by one of their alias (between 2 ':'). Example: "😄" gives ":smile:".
     *
     * @param content the string to parse
     * @return the string with the emojis replaced by their alias.
     */
    public static String toAliases(final String content) {
        return EmojiParser.parseToAliases(content, EmojiParser.FitzpatrickAction.IGNORE);
    }

    /**
     * Converts the specified content with emotions.
     *
     * <ol>
     * <li>Emoji: http://www.emoji-cheat-sheet.com</li>
     * </ol>
     *
     * @param content the specified content
     * @return converted content
     */
    public static String convert(final String content) {
        final String staticServePath = Latkes.getStaticServePath();

        String ret = content;

        if (!EMOJI_PATTERN.matcher(ret).find()) {
            return ret;
        }

        for (final String emojiCode : EMOJIS) {
            final String emoji = ":" + emojiCode + ":";
            ret = ret.replace(emoji, "<img align=\"absmiddle\" alt=\"" + emoji + "\" class=\"emoji\" src=\""
                    + staticServePath + "/js/lib/emojify.js/images/basic/" + emojiCode
                    + ".png\" title=\"" + emoji + "\" width=\"20px\" height=\"20px\"></img>");
        }

        return ret;
    }

    /**
     * Private constructor.
     */
    private Emotions() {
    }
}
