#!/usr/bin/env bash

# I do not endorce using this for piracy, only use it if you want to download content that is uploaded as creative commons or other legal uses.

urlencode() {
	# urlencode <string>
	old_lc_collate=$LC_COLLATE
	LC_COLLATE=C
	local length="${#1}"
	for (( i = 0; i < length; i++ )); do
		local c="${1:i:1}"
		case $c in
			[a-zA-Z0-9.~_-]) printf "$c" ;;
			*) printf '%%%02X' "'$c" ;;
		esac
	done
	LC_COLLATE=$old_lc_collate
}

url="$1"

[ -z "$url" ] && echo "You need to enter a url"

content="$(curl "$url")"

trackers="$(echo "$content" | pup '.torrent_info tr' 'text{}' | sed '/^$/d' |
	grep '^Tracker:$' -A 1 | sed -n 'n;p' | awk '{print "&tr=" $0}' | tr -d '\n' )"
hash="$(echo "$content" | pup '.torrent_info tr' 'text{}' | sed '/^$/d' | grep '^Info Hash:$' -A 1 | sed -n 'n;p' )"
title="$(echo "$content" | pup '.postTitle h1' 'text{}')"


echo "magnet:?xt=urn:btih:${hash}&dn=$( urlencode "$title" )${trackers}"