#!/bin/bash
# Simple slideshare downloader
# By Daniil Gentili (https://daniil.it)
# Licensed under GPLv3
# Copyright 2016 Daniil Gentili

#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.

#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.

#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

echo "Simple slideshare downloader   Copyright (C) 2016  Daniil Gentili.
This program comes with ABSOLUTELY NO WARRANTY; for details see 
https://github.com/danog/git-reset-repo/blob/master/LICENSE.
This is free software, and you are welcome to redistribute it
under certain conditions: see https://github.com/danog/simple-slideshare-downloader/blob/master/LICENSE.
"

usage() {
	echo "Usage: $0 URL"
	exit
}
[ -z "$*" ] && usage

for f in $*;do
	TOCONV=""
	echo "Downloading $f..."
	PAGE="$(curl -s "$f")"
	URLS=$(echo "$PAGE" | sed '/data-normal/!d;s/.*data-normal="//;s/\s.*//g' | tr -s '\n' ' ')
	TITLE=$(echo "$PAGE" | sed '/[<]title[>]/!d;s/.*[<]title[>]//g;s/[<]\/title[>].*//g')
	SAFETITLE="${TITLE//[^a-zA-Z0-9 ]/}"
	SAFETITLE=$(echo "$SAFETITLE" | sed 's/^\s*//g;s/\s*$//g')
	SAFETITLE="${SAFETITLE// /_}"
	mkdir "$SAFETITLE"
	for URL in $URLS;do
		FNAME="$SAFETITLE/"$(echo "$URL" | sed 's/\?.*//g;s/.*\///g')
		curl -sL "$URL" -o "$FNAME"
		TOCONV="$TOCONV $FNAME"
	done
	convert $TOCONV -gravity South -annotate 0 '%f' "$TITLE".pdf
	mv "$SAFETITLE" "$TITLE"
	echo "Saved in $TITLE.pdf, source images are in $TITLE/."
done

echo "Bye!"
exit