Check for download availability on Mac

check_race_dl.sh

#!/bin/bash
# MacOS torrent availbility notification and start download
# use gnu sed (/usr/local/bin/gsed) provided by brew instead of macos sed

NAME='Monaco'
EXCLUDE='Qualifying|Show|Notebook|SD'
URL='https://www.ettv.to/user/smcgill1969'
DOM='https://www.ettv.to'
HOST='localhost'
PORT='9091'
PEERS='1024'
OPTS='--stop --start-paused --peers ${PEERS}'
#OPTS='--start --no-start-paused --peers ${PEERS}'


if ! [ -x "$(command -v gsed)" ]; then
    echo 'Error: gnu sed is not installed. Exiting.' >&2
    exit 1
fi

clear

while [[ true ]]; do
    curl -fs ${URL} | grep Formula.1 | grep ${NAME} | egrep -v "${EXCLUDE}"
           if [[ $? -eq 0 ]]; then
       	    `say -v Daniel "Jason please start downloading the "${NAME}" Formula one race now. Thank you."`
       	    echo "Download the $NAME race now."
            DL=$(curl -fs ${URL} | grep Formula.1 | grep ${NAME} | egrep -v "${EXCLUDE}" | awk 'BEGIN{
            RS="</a>"
            IGNORECASE=1
            }
                {
                	for(o=1;o<=NF;o++){
                        if ( $o ~ /href/){
                            gsub(/.*href=\042/,"",$o)
                            gsub(/\042.*/,"",$o)
                            print $(o)
                        }
                }
                }')
	        echo -e "Checking ${DOM}${DL} ...\n"
	        MAG=$(curl -fs ${DOM}${DL} | gsed -rn '/magnet/{s/.*(magnet:[^"]*).*/\1/g;p}')
	        echo Magnet link is \"${MAG}\"
#	        size=${#MAG}
#	        echo $size
	            if [[ -n "${MAG}" ]]; then
	            	echo "Got magnet link"
	            	/usr/local/bin/transmission-remote ${HOST}:${PORT} --add ${MAG} ${OPTS}
	            	exit 0
	            	else
	            		echo magnet link not found.
	            	exit 2
	            fi
       	        else
       	    	    echo -ne "\r Last checked: $(/bin/date)"
       	    	    for i in {30..01}
                        do
                            tput cup 1 $l
                            echo -n " $i seconds until next check..."
                            sleep 1
                        done
                        echo "checking now..."
                        clear
	    fi
#    sleep 60
done

# to do
# get download URL from page ... DONE
# get magnet link from download page ... DONE
# check for null var string ... test still returning null
# add magnet to transmission start downloading ... DONE
# set per torrent settings on torrent in transmission ... DONE
# notify via audio ... DONE
# notify via email ... 

exit 0