#!/bin/ash

##################
# Remote logging #
##################
#
# Usage: slxlog [-e | --echo] "logtype" "Human readable string" ["file name which's contents should be sent too"]
# -e or --echo will echo message to stdout too
#

export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/openslx/sbin:/opt/openslx/bin"

. /opt/openslx/config
[ -z "$SLX_REMOTE_LOG" ] && exit 3

LOGCHECK="/tmp/remote_log_check"
NOW=$(date +%s)

if [ "x$1" = "x-e" -o "x$1" = "x--echo" ]; then
	shift
	echo "$@"
fi

[ $# -eq 0 ] && exit 0

TYPE="$1"

# Simple spamcheck. Not very tamper-proof, but if you'd want to spam the server
# you could do it anyways. This is to protect from accidental loops calling this.
if [ -r "$LOGCHECK" ]; then
	# Allow max 150 messages in total
	LINES=$(cat "$LOGCHECK" | wc -l)
	[ "$LINES" -gt "150" ] && exit 1
	# Allow max 5 of same type messages in 30 seconds
	LINES=$(grep "$TYPE" "$LOGCHECK" | wc -l)
	if [ "$LINES" -ge "5" ]; then
		LAST=$(grep "$TYPE" "$LOGCHECK" | tail -n 5 | head -n 1 | awk '{print $1}')
		if [ -n "$LAST" ]; then
			DIFF="$(( $NOW - $LAST ))"
			[ "$DIFF" -lt "30" ] && exit 2
		fi
	fi
fi
echo "$NOW $TYPE" >> "$LOGCHECK"
chmod 0666 "$LOGCHECK" 2>/dev/null

if [ $# -lt 2 ]; then
	MSG="Missing text for $@"
else
	MSG="$2"
fi
USER=$(whoami)
MSG="[$USER] $MSG"

if [ $# -gt 2 ]; then
	EXTRA="$3"
fi

if [ -n "$SLX_DEBUG" ]; then
	CURLLOG="/tmp/slxlog.$USER"
else
	CURLLOG="/dev/null"
fi

if [ -n "$EXTRA" ] && [ -r "$EXTRA" -a -s "$EXTRA" ] && [ "$(stat -c %s "$EXTRA")" -lt "10000" ]; then # valid file attachment
	curl --data-urlencode "type=$TYPE" --data-urlencode "description=$MSG" --data-urlencode "longdesc@$EXTRA" "$SLX_REMOTE_LOG" >> "$CURLLOG" 2>&1 &
elif [ -z "$EXTRA" ]; then # no attachment
	curl --data-urlencode "type=$TYPE" --data-urlencode "description=$MSG" "$SLX_REMOTE_LOG" >> "$CURLLOG" 2>&1 &
elif [ -s "$EXTRA" ]; then # empty attachment file (or missing)
	curl --data-urlencode "type=$TYPE" --data-urlencode "description=$MSG" --data-urlencode "longdesc=Attachment too large: $EXTRA" "$SLX_REMOTE_LOG" >> "$CURLLOG" 2>&1 &
else # attachment file to big (more than 10k)
	curl --data-urlencode "type=$TYPE" --data-urlencode "description=$MSG" --data-urlencode "longdesc=Attachment missing/empty: $EXTRA" "$SLX_REMOTE_LOG" >> "$CURLLOG" 2>&1 &
fi

exit 0