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#!/bin/sh
#----------------------------------------------------
# Author:       Florian "Bluewind" Pritz <flo@xssn.at>
# Contributor:  Moritz Wilhelmy
#
# Licensed under GPLv3
#   (see COPYING for full license text)
#
#----------------------------------------------------
# Optional dependency: xclip
#----------------------------------------------------

VERSION="@VERSION@"

DELETE=
EXTENSION=""
GET=
TAR=
COMPRESS=0
DISPLAYHISTORY=
PASTEBIN="http://paste.xinu.at"
WARNSIZE=10485760
CLIPBOARD=""
EXITCODE=0
LIBDIR="@LIBDIR@"

require_executable() {
	if ! type $1 >/dev/null; then
		echo "Error: $1 not found. Please install." >&2
		exit 1
	fi
}

is_url() {
	if echo "$i" | grep -qE "^(f|ht)tp(s)?://.+"; then
		return 0
	fi
	return 1
}

do_tar_upload() {
	if [ "$COMPRESS" = "1" ]; then
		file="$TMPDIR/upload.tar.gz"
		tar -cf - -- "$@" | gzip -c > "$file" || return 1
	elif [ "$COMPRESS" = "2" ]; then
		file="$TMPDIR/upload.tar.xz"
		tar -cf - -- "$@" | xz -c > "$file" || return 1
	else
		file="$TMPDIR/upload.tar"
		tar -cf "$file" -- "$@" || return 1
	fi
	COMPRESS=0
	do_upload "$file" || return 1
}

do_upload() {
	local EXTRA=""
	file="$1"
	basefilename="`basename -- "$file"`"
	basedirname="`dirname -- "$file"`"

	if [ ! -e "$file" ]; then
		echo "Error: File \"$file\" doesn't exist" >&2
		return 1
	fi

	if [ -d "$file" ]; then
		cd "$basedirname"
		if [ "$COMPRESS" = "1" ]; then
			file="$TMPDIR/$basefilename.tar.gz"
			tar -cf - -- "$basefilename" | gzip -c > "$file" || return 1
		elif [ "$COMPRESS" = "2" ]; then
			file="$TMPDIR/$basefilename.tar.xz"
			tar -cf - -- "$basefilename" | xz -c > "$file" || return 1
		else
			file="$TMPDIR/$basefilename.tar"
			tar -cf "$file" -- "$basefilename" || return 1
		fi
	else
		if [ "$COMPRESS" = "1" ]; then
			gzip -c -- "$file" > "$TMPDIR/$basefilename.gz" || return 1
			file="$TMPDIR/$basefilename.gz"
		elif [ "$COMPRESS" = "2" ]; then
			xz -c -- "$file" > "$TMPDIR/$basefilename.xz" || return 1
			file="$TMPDIR/$basefilename.xz"
		fi
	fi

	TMPFILE=`mktemp "$TMPDIR/data.XXXXXX"`
	if [ `stat -c %s -- "$file"` -gt "$WARNSIZE" ]; then
		WARNSIZE=`$LIBDIR/fb-helper d "$PASTEBIN/file/get_max_size"`
		if [ `stat -c %s -- "$file"` -gt "$WARNSIZE" ]; then
			echo "Warning: Your upload is too big and would be rejected. Maximum size is: $WARNSIZE bytes. Skipping..." >&2
			return 1
		fi
	fi

	$LIBDIR/fb-helper u "$PASTEBIN/file/do_upload" "$file" > $TMPFILE || return 1

	sed '$d' $TMPFILE >&2
	URL=`tail -1 $TMPFILE`"$EXTENSION"
	echo $URL
	if echo $URL | grep -qE "^https?://"; then
		CLIPBOARD="$CLIPBOARD $URL"
	fi
}

read_stdin() {
	if tty -s; then
		echo "^C to exit, ^D to send"
	fi
	cat > "$1"
}

id_from_arg() {
	if echo "$1" | grep -qE "^https?://"; then
		echo "$1" | sed -r 's/https?:\/\/[^\/]+\/([^\/]+).*/\1/'
	else
		echo "$1"
	fi
}

help() {
	cat <<!
fb-client version $VERSION
usage: [cat |] `basename "$0"` [switches] [options] [<file(s)|ID(s)|folder(s)>]

  Upload/nopaste file(s)/stdin to paste.xinu.at and copy URL(s) to clipboard.
  ~/.netrc: machine paste.xinu.at password PASSWORD

  Switches:
    -d <ID(s)>     delete the IDs
    -g <ID(s)>     download the IDs and output on stdout (use with care!)
    -h             this help
    -v             show the client version
    -H             display an upload history

  Options:
    -e <extension>   extension for default highlighting (e.g. "diff")
    -t               upload a tar file containing all files (and directories)
    -c               compress the file being uploaded with gz or xz if used 2 times
                     When used in conjunction with -g this decompresses the download
!
}

while getopts "e:gdhHtcv" OPTION; do
	case $OPTION in
		e) EXTENSION="$OPTARG";;
		g) GET=1;;
		c) COMPRESS=`expr $COMPRESS + 1`;;
		t) TAR=1;;
		d) DELETE=1;;
		H) DISPLAYHISTORY=1;;
		v) echo "$VERSION"; exit 0;;
		h|\?) help; exit 0;;
	esac
done

shift `expr $OPTIND - 1`

if [ "$COMPRESS" = "1" ]; then
	require_executable gzip
elif [ "$COMPRESS" = "2" ]; then
	require_executable xz
fi

TMPDIR="`mktemp -dt "fb.XXXXXX"`"
trap "rm -rf '${TMPDIR}'" EXIT TERM

if [ "$DELETE" ] || [ "$GET" ]; then
	if [ $# -eq 0 ]; then
		echo "Error: no ID specified" >&2
		exit 1
	fi
	for i in "$@"; do
		i=$(id_from_arg "$i")
		if [ "$DELETE" ]; then
			$LIBDIR/fb-helper d "$PASTEBIN/file/delete/$i" || EXITCODE=1

		elif [ "$GET" ]; then
			if [ "$COMPRESS" = "1" ]; then
				$LIBDIR/fb-helper d "$PASTEBIN/$i" | gzip -cd || EXITCODE=1
			elif [ "$COMPRESS" = "2" ]; then
				$LIBDIR/fb-helper d "$PASTEBIN/$i" | xz -cd || EXITCODE=1
			else
				$LIBDIR/fb-helper d "$PASTEBIN/$i" || EXITCODE=1
			fi
		fi
	done
elif [ "$DISPLAYHISTORY" ]; then
	$LIBDIR/fb-helper d "$PASTEBIN/file/upload_history" || EXITCODE=1

elif [ $# -eq 0 ]; then
	if [ "$TAR" ]; then
		echo "Error: -t is not supported when operating on stdin" >&2
		exit 1
	fi
	read_stdin "$TMPDIR/stdin"
	do_upload "$TMPDIR/stdin" || EXITCODE=1
else
	if [ "$TAR" ]; then
		HAVE_URL=
		for i in "$@"; do
			if is_url "$i"; then
				HAVE_URL=1
			fi
		done
		if [ "$HAVE_URL" ]; then
			# TODO: support -t when passing URLs as arguments
			echo "Error: -t is not yet supported when operating on a URL" >&2
			exit 1
		else
			do_tar_upload "$@" || EXITCODE=1
		fi
	else
		for i in "$@"; do
			if is_url "$i"; then
				cd $TMPDIR
				if ! $LIBDIR/fb-helper d "$i" > "`basename "$i"`"; then
					EXITCODE=1
					continue
				fi
				for f in *; do
					if ! do_upload "$f"; then
						EXITCODE=1
					fi
					rm -f -- "$f"
				done
			else
				do_upload "$i" || EXITCODE=1
			fi
		done
	fi
fi

if [ "$CLIPBOARD" != "" ]; then
	type xclip >/dev/null 2>&1 && echo -n $CLIPBOARD | nohup xclip >/dev/null 2>&1
fi

exit $EXITCODE

#vim: set noet: