Grub all emoji from a misskey server and outputs its width and height.

list-aspect-ratio.sh

#!/bin/bash

# SPDX-FileCopyrightText: 2023 Kisaragi Marine <kisaragi.marine@gmail.com>
# SPDX-License-Identifier: MIT OR Apache-2.0

set +x

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

if ! command -v curl &> /dev/null; then
  die "This script requires curl."
fi

if ! command -v jq &> /dev/null; then
  die "This script requires curl."
fi

if ! command -v convert &> /dev/null; then
  die "This script requires ImageMagick."
fi

readonly UA='User-Agent: KisaragiEffective/list-aspect-ratio/0.1'
readonly MISSKEY_HOST='https://dummy.local'
readonly emojis="$(curl -sSL -H "$UA" "$MISSKEY_HOST/api/emojis" | jq -r '.emojis | map([.name, .url]) | .[] | @csv')"

for emoji in $emojis; do
  readonly emoji_url="$(echo "$emoji" | awk -F, '{ print $2 }' | sed -E 's/^"(.*)"$/\1/')"
  readonly emoji_name="$(echo "$emoji" | awk -F, '{ print $1 }' | sed -E 's/^"(.*)"$/\1/')"
  # echo "processing $emoji_url"
  readonly image_path="$(mktemp)"
  curl -sSL -H "$UA" "$emoji_url" > "$image_path"
  readonly tmp_err="$(mktemp)"
  (convert "$image_path" -print '{"result": "ok", "width": %w, "height": %h}' /dev/null 2>"$tmp_err" || jq '{"result": "error", "reason": .}' < "$tmp_err") | \
    jq --arg name "$emoji_name" '. + {"name": $name}'
done