shell script news reader

news-reader.sh

#!/bin/sh
reader(){
	if [ -z "$1" ];then
		RSS_URL="https://www.khabaronline.ir/rss"
	else
		RSS_URL=$1
	fi

	curl --silent "$RSS_URL" | \

	grep -E '(title>|description>|link>)' | \

	tail -n +4 | \

	sed -e 's/^[ \t]*//' | \
	
	if [[ $2 == "w" ]];then
		sed -e 's/<title>//' -e 's/<\/title>//' -e 's/<description>/  /' -e 's/<\/description>//' -e 's/<link>//' -e 's/<\/link>//' > news.txt ; gedit news.txt &
	else
		sed -e 's/<title>//' -e 's/<\/title>//' -e 's/<description>/  /' -e 's/<\/description>//' -e 's/<link>//' -e 's/<\/link>//'
	fi
	
}
###############################	
starter(){
	PS3='Please enter your choice: '
	options=("read news and show in terminal"  "read news and save into file and open file" "select news source" "Quit")
	select opt in "${options[@]}"
	do
	    case $opt in
		"read news and show in terminal")
		    reader
		    break
		    ;;
		"read news and save into file and open file")
		    reader "https://www.khabaronline.ir/rss" w
		    break
		    ;;
		"select news source")
		    echo 'Select site: '
		    echo '0) khabaronline.ir'
		    echo '1) mehrnews.com'
		    sites=("https://www.khabaronline.ir/rss" "https://www.mehrnews.com/rss")
		    read site
		    reader ${sites[$site]}
		    ;;
		"Quit")
		    break
		    ;;
		*) echo "invalid option $REPLY";;
	    esac
	done
}
if [ $# -gt 0 ];then
	case $1 in
		1)
			reader 
			;;
		2)
			reader "https://www.khabaronline.ir/rss" w
			;;
	esac	
else
	starter
fi