#!/usr/bin/env bash
set -eu

# Get mastodon instance from MASTODON_INSTANCE
if [ -z ${MASTODON_INSTANCE+x} ]; then
  # set from $1 if available
  if [ -z ${1+x} ]; then
    echo "You need to provide a Mastodon instance."
    exit 1
  else
    mastodon_instance="$1"
  fi
else
  mastodon_instance="$MASTODON_INSTANCE"
fi

echo "Mastodon instance: $mastodon_instance"

# Get emoji folder
emojiFolder="$(readlink -f "$(dirname $0)/../frontend/emojis/")"

echo "Downloading emojis to $emojiFolder"

echo "Creating $emojiFolder if it doesn't exist"

mkdir -p "$emojiFolder"

# load $mastodon_instance/api/v1/custom_emojis with curl into a variable

customEmojisJson=$(curl -s "$mastodon_instance/api/v1/custom_emojis")


shortcodes=$(echo "$customEmojisJson" | jq -r '.[].shortcode')
readarray -t shortcodesArray <<< "$shortcodes"
urls=$(echo "$customEmojisJson" | jq -r '.[].url')
readarray -t urlsArray <<< "$urls"
visible_in_pickers=$(echo "$customEmojisJson" | jq -r '.[].visible_in_picker')
readarray -t visible_in_pickersArray <<< "$visible_in_pickers"

# read through the urls and download the emojis
for ((i=0; i<${#shortcodesArray[@]}; i++)); do
  # if not visible_in_pickers, continue
  if [ "${visible_in_pickersArray[$i]}" != "true" ]; then
    echo "Skipping ${shortcodesArray[$i]} because it is not visible in the picker"
    continue
  fi
  url="${urlsArray[$i]}"
  # get only extension from the url
  fileext=$(echo "$url" | sed 's/.*\///' | sed 's/.*\.//')
  # filename is shortcode + extension
  filename="${shortcodesArray[$i]}.$fileext"
  # download the emoji
  # if file already exists, skip
  if [ -f "$emojiFolder/$filename" ]; then
    echo "Skipping $filename because it already exists"
    continue
  fi
  curl -s "$url" -o "$emojiFolder/$filename" &
done