add mastodon emoji getter

scripts/get_emojis_mastodon.sh

@@ -0,0 +1,60 @@
+#!/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
+  echo "Downloading $filename"
+  curl -s "$url" -o "$emojiFolder/$filename"
+done