updateytsubs

#! /bin/bash
# Run this in cron
# First parameter is path your subscription_manager file downloadable from 
# Youtube https://www.youtube.com/subscription_manager (Bottom of the page)
# It updates ~/.youtubesubs

# test network connectivity
ping -q -w 1 -c 1 youtube.com > /dev/null || exit 1

# test that the file given as a parameter is atleast somewhat correct
if [ "$(grep 'opml' $1 | wc -l)" -eq 0 ]; then
	echo "invalid parameter"
	exit 1
fi

fetched="$(cat $1 \
	| sed -e 's/\"/\n/g' -e 's/;//g'  \
	| grep https \
	| sed -e 's/^/curl -s /' | sh \
	| grep -A 16 "<entry>" \
	| grep  "<name>\|<title>\|<yt:videoId>\|<published>" \
	| paste - - - - \
	| sed \
		-e "s/\(.*\)<published>\(.*\)<\/published>\(.*\)/\1\3\t\2/" \
		-e "s/\(.*\)<name>\(.*\)<\/name>\(.*\)/\1\3\t\2/" \
		-e "s/\(.*\)<title>\(.*\)<\/title>\(.*\)/\1\3\t\2/" \
		-e "s/\(.*\)<yt:videoId>\(.*\)<\/yt:videoId>\(.*\)/\1\3\t\2/" \
		-e "s/^\s*//" \
		-e 's/\&quot;/"/g' -e 's/\&amp;/\&/g' \
	)"

combined="$(echo -e "$fetched" | cat - ~/.youtubesubs \
       | sort -t$'\t' -u -k4,4 \
       | sort -rn)"
echo "$combined" > ~/.youtubesubs