#!/bin/sh
#    Copyright © 2011 Pau Escrich
#    Contributors Jo-Philipp Wich <xm@subsignal.org>
#		 Roger Pueyo Centelles <roger.pueyo@guifi.net>
#
#    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 2 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, write to the Free Software Foundation, Inc.,
#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#    The full GNU General Public License is included in this distribution in
#    the file called "COPYING".
#
#    This script gives information about bmx7
#    Can be executed from a linux shell: ./bmx7-info -s links
#    Or from web interfae (with cgi enabled): http://host/cgi-bin/bmx7-info?links
#    If you ask for a directory you wil get the directory contents in JSON forman

BMX7_DIR="$(uci get bmx7.general.runtimeDir 2>/dev/null)" || BMX7_DIR="/var/run/bmx7/json"

#Checking if shell mode or cgi-bin mode
if [ "$1" == "-s" ]; then
	QUERY="$2"
else
	QUERY="${QUERY_STRING%%=*}"
	echo "Content-type: application/json"
	echo ""
fi

check_path() {
	[ -d "$1" ] && path=$(cd $1; pwd)
	[ -f "$1" ] && path=$(cd $1/..; pwd)
	[ $(echo "$path" | grep -c "^$BMX7_DIR") -ne 1 ] && exit 1
}

print_mem() {
	echo -n '{ "memory": { "bmx7": "'
	cat /proc/$(cat /var/run/bmx7/pid)/status |grep -i VmSize | tr -s " " | cut -d " " -f 2,3 | tr -d "\n"
	echo '"}}'
}

print_query() {
	# If the query is a directory
	[ -d "$BMX7_DIR/$1" ] &&
	{
	# If /all has not been specified
		[ -z "$QALL" ] &&
		{
		total=$(ls $BMX7_DIR/$1 | wc -w)
		i=1
		echo -n "{ \"$1\": [ "
		for f in $(ls $BMX7_DIR/$1); do
			echo -n "{ \"name\": \"$f\" }"
			[ $i -lt $total ]  && echo -n ','
			i=$(( $i + 1 ))
		done
		echo -n " ] }"

	# If /all has been specified, printing all the files together
		} || {
		comma=""
		echo -n "[ "
		for entry in "$BMX7_DIR/$1/"*; do
			[ -f "$entry" ] &&
			{
				${comma:+echo "$comma"}
				tr -d '\n' < "$entry"
				comma=","
			}
		done
		echo -n " ]"
		}
	}

	# If the query is a file, just printing the file
	[ -f "$BMX7_DIR/$1" ] && [ -s "$BMX7_DIR/$1" ] && cat "$BMX7_DIR/$1" && return 0 || return 1
}

if [ "${QUERY##*/}" == "all" ]; then
	QUERY="${QUERY%/all}"
	QALL=1
fi

if [ "$QUERY" == '$info' ]; then
	echo '{ "info": [ '
	print_query status
	echo -n ","
	print_query interfaces && echo -n "," || echo -n '{ "interfaces": "" },'
	print_query links && echo -n "," || echo -n '{ "links": "" },'
	print_mem
	echo "] }"
fi

if [ "$QUERY" == '$neighbours' ]; then
	QALL=1
	echo '{ "neighbours": [ '
	echo '{ "originators": '
	print_query originators
	echo '}, '
	echo '{ "descriptions": '
	print_query descriptions
	echo "} ] }"
	exit 0

else if [ "$QUERY" == '$tunnels' ]; then
	bmx7 -c --jshow tunnels /r=0
	exit 0

	else if [ "$QUERY" == '$originators' ]; then
		bmx7 -c --jshow originators /r=0
		exit 0

		else
		check_path "$BMX7_DIR/$QUERY"
		print_query $QUERY
		exit 0
		fi
	fi
fi
fi

ls -1F "$BMX7_DIR"
exit 0