foo.sh

#!/usr/bin/env bash

set -x
CLIENT_ID=<REDACTED>
LOG_FILE=~/.image_uploader.log

touch $LOG_FILE

# folder to watch
SCREENSHOT_FOLDER=/home/user/Pictures/screenshots

created_file() {
    inotifywait -e create $SCREENSHOT_FOLDER --format "%f"
}

upload_to_imgur() {
    curl -vvv --fail --request POST --header "authorization: Client-ID ${CLIENT_ID}"  \
         --header 'content-type: multipart/form-data;' \
         -F "image=@${1}" "https://api.imgur.com/3/image" | jq '.data.link'
}

dialog() {
    zenity --info --text="$1"
}

while true; do
    screenshot_file=$(created_file)
    if [[ $screenshot_file =~ "png" ]]; then
        image_link=$(upload_to_imgur "${SCREENSHOT_FOLDER}/${screenshot_file}")
        if [ $? -eq 0 ]; then
            dialog "Screenshot upload: $image_link saved to clipboard"
            echo $image_link | xsel --clipboard
        else
            dialog "Something went wrong $(tail -1 $LOG_FILE)"
        fi
    fi
done