#!/usr/bin/env bash

declare -A emoji
emoji[smile]=😃
emoji[bear]=🐻
emoji[hamburger]=🍔
emoji[lightbulb]=💡
emoji[idea]=💡
emoji[comment]=💬
emoji[chat]=💬
emoji[pomo]=🍅
emoji[stop]=🛑
emoji[warning]=⚠️
emoji[rant]=🤬
emoji[tv]=📺
emoji[update]=📰
emoji[tux]=🐧
emoji[tux]=🐧
emoji[poop]=💩
emoji[yoga]=🧘
emoji[facepalm]=🤦

toemoji() {
  local in=/dev/stdin
  local out=/dev/stdout
  local file="$1"
  if [[ -n $file ]];then
    in="$file"
    out="$(mktemp)"
  fi
  IFS=$'\n'
  while read -r line; do 
    for k in ${!emoji[@]}; do 
      line=${line//:$k:/${emoji[$k]}}
    done
    echo "$line" >> $out
  done < "$in"
  if [[ -n $file ]]; then
    cp "$out" "$file"
    rm "$out"
  fi
}

toemoji "$@"