#!/bin/bash
#                       /usr/local/bin/qyou
# https://crystalfaeries.net/posix/bin/qyou
# celeste:crystalfaery QYOU 2017-12-05 23:20:16+00:00
# if invoked without arguments, display the existing youtubedownload queue
# if invoked with ususal version or help arguments, deliver that info		and quit
# if invoked with argument -p,		display any running youtube-dl processes		and quit
# if invoked with argument -l,		display the tail	 of the youtubedownload log	and quit
# if invoked with argument -l n,	display the tail n lines of the youtubedownload log	and quit
# if invoked with argument -F, Follow  the tail of the youtubedownload log
# if invoked with argument -i, interactively receive  URLs to add to	the queue
# if invoked with argument -e, interactively edit the URLs	in	the queue
# if invoked with any other arguments, add those URLs to the youtubedownload queue
help=12	# this line number -1

case	$# in
0)	# if invoked without arguments, display the existing youtubedownload queue
	echo "youtubedownload queue:"				>& 2
	sort -u /home/downloads/youtube.com/.youtube.txt
	;;
*)
	# if invoked with ususal version or help arguments, deliver that info	and quit
	case "${1}" in
	-h)		head -n ${help} $0
			;;
	--help)		head -n ${help} $0
			;;
	-v)		head -n 4 $0 | tail -n 1
			;;
	--version)	head -n 4 $0 | tail -n 1
			;;
	-p)		ps -ef --forest | grep "python /usr/local/bin/youtube-dl" | grep -v grep
			;;
	-l)		shift	# consume the -l and check for a line count for tail:
			if [ $# -ne 0 ]
			then
				tail -n ${1}	/home/downloads/youtube.com/.youlog.txt
			else
				tail		/home/downloads/youtube.com/.youlog.txt
			fi
			;;
	-F)		tail -F	/home/downloads/youtube.com/.youlog.txt
			;;
	-i)	# if invoked with argument -i, interactively receive URLs to add to the queue
		while read URL
		do
			echo "${URL}"	>> /home/downloads/youtube.com/.youtube.txt	# append new URL
		done
		;;
	-e)	# if invoked with argument -e, interactively edit the URLs	in	the queue
			sort -u		   /home/downloads/youtube.com/.youtube.txt	\
			>	/tmp/.$$.youtube.txt
			vi	/tmp/.$$.youtube.txt
			sort -u	/tmp/.$$.youtube.txt					\
			>		   /home/downloads/youtube.com/.youtube.txt
			exit	$?
		;;
	*)	# if invoked with any other arguments, add those URLs to the youtubedownload queue
		while [ $# -gt 0 ]
		do
			echo "${1}"	>> /home/downloads/youtube.com/.youtube.txt	# append new URL
			shift	# consume the argument
		done
		;;
	esac
	;;
esac
exit	$?