#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2019, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to export an image to qcow2 file
###############################################################################

# ------------ Set up the environment to source common tools ------------

if [ -z "${ONE_LOCATION}" ]; then
    LIB_LOCATION=/usr/lib/one
else
    LIB_LOCATION=$ONE_LOCATION/lib
fi

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
UTILS_PATH="${DRIVER_PATH}/.."

source ${DRIVER_PATH}/../libfs.sh
source ${DRIVER_PATH}/../../etc/datastore/linstor_un/linstor_un.conf
source ${DRIVER_PATH}/linstor_utils.sh

# -------- Get rm and datastore arguments from OpenNebula core ------------

if [ -n "$2" ]; then
    DRV_ACTION=$1
    ID=$2
else
    DRV_ACTION=$(cat -)
    ID=$1
fi

XPATH="${UTILS_PATH}/xpath.rb -b $DRV_ACTION"

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <($XPATH     /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/SIZE \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LS_CONTROLLERS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LS_CERTFILE \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LS_KEYFILE \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LS_CAFILE)

SRC="${XPATH_ELEMENTS[j++]}"
SIZE="${XPATH_ELEMENTS[j++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[j++]}"
LS_CONTROLLERS="${XPATH_ELEMENTS[j++]}"
LS_CERTFILE="${XPATH_ELEMENTS[j++]}"
LS_KEYFILE="${XPATH_ELEMENTS[j++]}"
LS_CAFILE="${XPATH_ELEMENTS[j++]}"

SRC_DEV="$SRC"
SRC_RES="$(echo "$SRC_DEV" | $AWK -F/ '{print $(NF-1)}')"

#-------------------------------------------------------------------------------
# Output image source and format
#-------------------------------------------------------------------------------

INFO_SCRIPT=$(cat <<EOF
CHECKSUM=\$(${MD5SUM} ${SRC} | cut -f1 -d' ')

if [ -z "\$CHECKSUM" ]; then
    exit 1
fi

echo "<MD5><![CDATA[\$CHECKSUM]]></MD5>"
echo "<SIZE><![CDATA[${SIZE}]]></SIZE>"
echo "<FORMAT><![CDATA[raw]]></FORMAT>"
EOF
)

SRC_HOST=`linstor_get_bridge_host "$SRC_RES" 1`
if [ -z "$SRC_HOST" ]; then
    exit -1
fi

linstor_load_keys

SRC="ssh://$SRC_HOST:$SRC_DEV"
INFO=$(ssh_monitor_and_log "$SRC_HOST" "$INFO_SCRIPT" "Image info script" 2>&1)

INFO_STATUS=$?

if [ "$INFO_STATUS" != "0" ]; then
    echo "$INFO"
    exit $INFO_STATUS
fi

echo "<IMPORT_INFO><IMPORT_SOURCE><![CDATA[$SRC]]></IMPORT_SOURCE> \
      $INFO \
      <DISPOSE>NO</DISPOSE></IMPORT_INFO>"

