#!/bin/sh

duplicate_processes=$(pgrep -x "cnuk_rss_update" | grep -v $$ | grep -v $(($$+1)))
kill $duplicate_processes

while true; do
	if pgrep -x "CNUKTUBE" > /dev/null
	then
		while IFS= read -r line; do
	
			curl -s $line > ./rss/1.temp
	
			channel_name=$(grep -m 1 "<name>" ./rss/1.temp | sed 's/<name>//' | sed 's/<\/name>//' | sed 's/  //g' | tr -dc '[:print:]\n' | sed 's/;//g; s/|//g; s/\[//g; s/\]//g')

	
			grep 'published\|media:title\|media:content' ./rss/1.temp > ./rss/2.temp
	
			sed -i 1d ./rss/2.temp
			sed -i 's/  <published>//g' ./rss/2.temp
			sed -i 's/<\/published>//g' ./rss/2.temp
			sed -i 's/   <media:title>/    /g' ./rss/2.temp
			sed -i 's/<\/media:title>//g' ./rss/2.temp
			sed -i 's/   <media:content url="/    /g' ./rss/2.temp
			tr -d '\n' < ./rss/2.temp > ./rss/3.temp
			sed -i "s/\" type=\"application\/x-shockwave-flash\" width=\"640\" height=\"390\"\/>/\n/g" ./rss/3.temp
			sed -i 's/T..:..:..+00:00//g' ./rss/3.temp
	
			if [ ! -f ./rss/feeds/"$channel_name" ]; then
				touch ./rss/feeds/"$channel_name"
			fi
	
			while IFS= read -r line; do
				escaped_line_1=$(tr -dc '[:print:]\n' <<< "$line")
				escaped_line_2=$(sed 's/;//g; s/|//g; s/\[//g; s/\]//g; s/&quot//g' <<< "$escaped_line_1")
				if grep -q -F "$escaped_line_2" ./rss/feeds/"$channel_name"
				then
					break
				else
					echo "new video: "$escaped_line_2
					echo "NEW    $escaped_line_2" >> ./rss/4.temp
				fi
			done < ./rss/3.temp

			if [ -f ./rss/4.temp ]; then
				cat ./rss/feeds/"$channel_name" >> ./rss/4.temp
				mv ./rss/4.temp ./rss/feeds/"$channel_name"
			fi
	
			rm ./rss/1.temp
			rm ./rss/2.temp
			rm ./rss/3.temp
	
		done < ./rss/channels.txt
		sleep 360
	else
		break
	fi
done