#!/bin/sh
#
# Manage apache webdav
#	- after mounting: add the new webdav share
#	- before umounting: disable and remove the webdav share
#
# This script assumes, that you added the apache2_dav.conf file
# (/usr/share/doc/cryptobox/conf-examples/) to your apache configuration directory
# (e.g. /etc/apache2/conf.d)
#
#
# Params:	$event $volume_name $volume_type $mount_dir
#
#	event:	premount | postmount | preumount | postumount
#	device:	name of the device
#	volume_name:	name of the volume
#	volume_type:	plain | luks
#	mount_dir:	mount directory
#

set -eu

APACHE_SCRIPT=/etc/init.d/apache2
APACHE_CONF_DIR=/var/cache/cryptobox/apache2_dav.conf.d
TEMPLATE_CONF_FILE=/etc/cryptobox/apache2_dav-share.conf-template
MAIN_APACHE_CONF_FILE=/etc/cryptobox/apache2-include.conf

# exit if apache2 is not installed
test -e "$APACHE_SCRIPT" || exit 0

# create include-file directory
mkdir -p "$APACHE_CONF_DIR"

# check event argument
if test "$#" -eq 0
  then	echo "Syntax: $(basename $0) EVENT [EVENT_INFORMATION]" >&2
	exit 1
 fi

event=$1


# ------------=-=-=- some functions -=-=-=-----------------

update_include_conf_file()
{
	(	echo "# this file was automatically generated by the CryptoBox"
		echo "# DO NOT EDIT - all changes will get lost!"
		find "$APACHE_CONF_DIR" -type f -name "*.conf" | while read fname
		  do	echo "Include '$fname'"
		 done ) >"$MAIN_APACHE_CONF_FILE"
}

send_reload_command()
{
	# reload config files
	"$APACHE_SCRIPT" reload
}

# -----------------=-=-=- main -=-=-=----------------------

case "$event" in
	premount|postumount )
		;;
	postmount )
		vol_name=$3
		mount_dir=$5
		sed "s#_SHARE_DIR_#$mount_dir#g; s#_VOLUME_NAME_#$vol_name#g" "$TEMPLATE_CONF_FILE" >"$APACHE_CONF_DIR/${vol_name}.conf"
		update_include_conf_file
		send_reload_command
		;;
	preumount )
		vol_name=$3
		rm "$APACHE_CONF_DIR/${vol_name}.conf" || true
		update_include_conf_file
		send_reload_command
		;;
	* )
		# ignore all events that we do not support
		exit 0
		;;
  esac

exit 0