Dump Moldovan emojis from https://www.pinterest.com/fruitware/moldavian-emoji/ in a Slack compatible format

moldovan_emojis.sh

#!/usr/bin/env bash

_emoji_dir="$1"
_tmp_dir=$(mktemp -d)
_suffix=".emoji.png"
_script="_emoji.js"
_url="https://www.pinterest.com/fruitware/moldavian-emoji/"
_lib="pinterest-api"

die()
{
  echo "$1" 1>&2
  exit 1
}

spinner()
{
  local pid=$!
  local delay=0.025
  local spinstr='|/-\'
    
  while [ "$(ps a | awk '{print $1}' | grep $pid)" ]; do
    local temp=${spinstr#?}
    printf "\e[?25l%c" "$spinstr" 1>&2
    local spinstr=$temp${spinstr%"$temp"}
    sleep $delay
    printf "\e[?25l\r" 1>&2
  done
    
  printf "\e[?25h" 1>&2
}

emojify()
{
  local source="$1"
  local dest="${source%.*}$_suffix"
  
  convert -monitor -quality 100 -trim +repage -fuzz 30% -flatten "$source" "$dest" || die "Error trimming $source"
  convert -monitor -quality 100 -fuzz 20% -transparent white "$dest" "$dest" || die "Error removing background from $dest"
  convert -monitor -quality 100 -resize 128x128 "$dest" "$dest" || die "Error resizing $dest"
}

download()
{
  local emoji_url="$1"
  local emoji_path="$2"
  
  curl -XGET "$emoji_url" --fail --progress -o "$emoji_path" || die "Error fetching image from $emoji_url"
}

if [ ! -d "$_emoji_dir" ]; then
  die "Missing output directory $_emoji_dir"
elif [ -z `which npm` ] || [ -z `which node` ] || [ -z `which curl` ] || [ -z `which convert` ] || [ -z `which base64` ]; then
  die "You should have the following binaries available: npm, node, curl, convert, base64"
fi

echo "Ensure $_lib installed"

ls $(npm -g root)"/$_lib" &>/dev/null || npm install -g "$_lib" --silent || die "Error installing $_lib dependency"

echo "Dumping Moldovan emoji's from $_url"

echo "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" | base64 --decode > "$_tmp_dir/$_script"

for emoji_url in $(node "$_tmp_dir/$_script" & spinner || die "Error fetching emojis metadata from $_url")
do
  emoji_name=${emoji_url##*/}
  emoji_path="$_tmp_dir/$emoji_name"
  
  download "$emoji_url" "$emoji_path"
  emojify "$emoji_path"
  cp "${emoji_path%.*}$_suffix" "$_emoji_dir/$emoji_name" || die "Error copying emoji to $_emoji_dir/$emoji_name"
done

rm -rf "$_tmp_dir"