#!/usr/bin/env bash
#
#   Use rofi to pick emoji because that's what this
#   century is about apparently...
#
#   Requirements:
#     rofi, xclip, xdotool, curl, xmllint
#
#   Usage:
#     1. Download all emoji
#        $ rofi-emoji --download
#
#     2. Run it!
#        $ rofi-emoji
#
#   Notes:
#     * You'll need a emoji font like "Noto Emoji" or "EmojiOne".
#     * Confirming an item will automatically paste it WITHOUT
#       writing it to your clipboard.
#     * Ctrl+C will copy it to your clipboard WITHOUT pasting it.
#

# Where to save the emojis file.
EMOJI_FILE="${XDG_CACHE_DIR:-$HOME/.cache}/emojis.txt"

# Urls of emoji to download.
URLS=(
    'https://emojipedia.org/people/'
    'https://emojipedia.org/nature/'
    'https://emojipedia.org/food-drink/'
    'https://emojipedia.org/activity/'
    'https://emojipedia.org/travel-places/'
    'https://emojipedia.org/objects/'
    'https://emojipedia.org/symbols/'
    'https://emojipedia.org/flags/'
    'https://emojipedia.org/modifiers/'
)


function download() {
    notify "$(basename "$0")" 'Downloading all emoji for your pleasure'

    echo -n > "$EMOJI_FILE"

    for url in "${URLS[@]}"; do
        echo "Downloading: $url"

        # Download the list of emoji and remove all the junk around it
        emojis=$(curl -s "$url" | \
                 xmllint --html \
                         --xpath '//ul[@class="emoji-list"]' - 2>/dev/null)

        # Get rid of starting/closing ul tags
        emojis=$(echo "$emojis" | head -n -1 | tail -n +1)

        # Extract the emoji and its description
        emojis=$(echo "$emojis" | \
                 sed -rn 's/.*<span class="emoji">(.*)<\/span> (.*)<\/a><\/li>/\1 \2/p')

        echo "$emojis" >> "$EMOJI_FILE"
    done

    notify "$(basename "$0")" "We're all set!"
}

function toclip() {
    xclip -i -selection primary
    xclip -o -selection primary | xclip -i -selection clipboard
}

function repeat() {
    local rplc str="$1" count="$2"
    rplc="$(printf "%${count}s")"
    echo "${rplc// /"$str"}"
}

function notify() {
   if which notify-send 1>/dev/null 2>/dev/null; then
        notify-send "$1" "$2"
    fi
}

function display() {
    emoji=$(cat "$EMOJI_FILE" | grep -v '#' | grep -v '^[[:space:]]*$')
    update="⏫ Update emoji cache"
    emoji=$(printf "$emoji\n$update")
    line=$(echo "$emoji" | rofi -dmenu -i -p emoji -normal-window -kb-custom-1 Ctrl+c -kb-row-tab '' -kb-row-select Tab $@)
    exit_code=$?

    if [ "${line[@]}" == "$update" ]; then
        download
        display
        return
    fi

    line=($line)
    last=${line[${#line[@]}-1]}

    quantifier="${last:${#last}-1:1}"
    echo "$quantifier" | egrep -q '^[0-9]+$' || quantifier=1
    emojis="$(repeat "${line[0]}" "$quantifier")"

    if [ $exit_code == 0 ]; then
        xdotool type --clearmodifiers "$emojis"
        echo -n "$emojis" | xclip -i
    elif [ $exit_code == 10 ]; then
        echo -n "$emojis" | xclip -i
    fi
}


if [[ "$1" =~ -D|--download ]]; then
    download
    exit 0
elif [[ "$1" =~ -h|--help ]]; then
    echo "usage: $0 [-D|--download]"
    exit 0
fi

display