#!/bin/bash
# Quick grep for emojis from the terminal.
# You first have to download the UCD archive. It's only a few MB compressed.
# I use ripgrep for its speed but you can replace GREP by what you see fit.
# Bonus! Use this bash function to copy the first result in your X clipboard:
# mj() { emoji -u "$1" | xclip ; echo "$(xclip -o)" }
# Made with 💖 by dece. s/o to mon loulou, the bash samurai. License: WTFPLv2.

UCD_URL="https://www.unicode.org/Public/UCD/latest/ucdxml/ucd.all.flat.zip"
UCD="$HOME/.local/share/emoji/ucd.all.flat.zip"
GREP="rg"

usage() {
    echo "usage: $0 [-n] [-l LIMIT] FILTER"
    echo "Display emojis based on the name filter provided."
    echo "  -h        show usage"
    echo "  -n        hide emoji name"
    echo "  -l LIMIT  limit number of output lines"
    echo "  -u        unique result (equals -n and -l 1), no new line"
    echo "  -c        show code point"
    echo "  -d        download UCD zip (requires curl)"
}

[ $# -eq 0 ] && usage && exit

download_ucdxml() {
    directory="$(dirname "$UCD")"
    [ ! -d "$directory" ] && mkdir -p "$directory"
    curl -L -o "$UCD" "$UCD_URL"
}

HIDE_NAME=
LIMIT=
NO_NEW_LINE=
SHOW_CP=
while getopts "hdnl:uc" OPTION; do
    case $OPTION in
        h) usage; exit 0 ;;
        d) download_ucdxml; exit $? ;;
        n) HIDE_NAME=true ;;
        l) LIMIT=$OPTARG ;;
        u) HIDE_NAME=true; LIMIT=1; NO_NEW_LINE=true ;;
        c) SHOW_CP=true ;;
        *) usage; exit 1 ;;
    esac
done
shift $(( OPTIND - 1 ))
FILTER="$*"

if [ ! -f "$UCD" ]; then
    echo "Can't find UCD archive at $UCD. Use -d to download it!"
    exit 1
fi

search_chars() {
    zcat "$UCD" | "$GREP" 'Emoji="Y"' | "$GREP" -i "na.?=\"[^\"]*$1[^\"]*\""
}

line_id=0
search_chars "$FILTER" | while read -r line; do
    [ -n "$LIMIT" ] && (( line_id >= LIMIT )) && break
    codepoint="$(echo "$line" | sed -E 's/.* cp="([0-9A-F]+)".*/\1/g')"
    result="$(echo -e "\\U$codepoint")"
    if [ "$HIDE_NAME" != true ]; then
        name="$(echo "$line" | sed -E 's/.* na="([^"]+)".*/\1/g')"
        result="$result $(echo "$name" | tr '[:upper:]' '[:lower:]')"
    fi
    if [ "$SHOW_CP" = true ]; then
        result="$result (U+$codepoint)"
    fi
    [ "$NO_NEW_LINE" = true ] && echo_opt="-n" || echo_opt=""
    echo "$echo_opt" "$result"
    line_id=$(( line_id + 1 ))
done