#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2015, OpenNebula Project (OpenNebula.org), C12G Labs        #
#                                                                            #
# 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.                                             #
#--------------------------------------------------------------------------- #

# ------------------------------------------------------------------------------
#  Set up Environment and transfer arguments
# ------------------------------------------------------------------------------
#
#  vmfs.conf: includes default TMP_DIR
#  libfs.sh a& scripts_common.sh: includes tools and lib calls
# ------------------------------------------------------------------------------

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

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
source ${DRIVER_PATH}/../libfs.sh
source ${DRIVER_PATH}/vmfs.conf

# -------- cp and datastore arguments from OpenNebula core ------------

DRV_ACTION=$1
ID=$2

UTILS_PATH="${DRIVER_PATH}/.."

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/DATASTORE/BASE_PATH \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/ID \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/RESTRICTED_DIRS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/SAFE_DIRS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/DS_TMP_DIR \
                    /DS_DRIVER_ACTION_DATA/IMAGE/PATH \
                    /DS_DRIVER_ACTION_DATA/IMAGE/TEMPLATE/MD5 \
                    /DS_DRIVER_ACTION_DATA/IMAGE/TEMPLATE/SHA1 \
                    /DS_DRIVER_ACTION_DATA/IMAGE/TYPE \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NO_DECOMPRESS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LIMIT_TRANSFER_BW)

BASE_PATH="${XPATH_ELEMENTS[j++]}"
DS_ID="${XPATH_ELEMENTS[j++]}"
RESTRICTED_DIRS="${XPATH_ELEMENTS[j++]}"
SAFE_DIRS="${XPATH_ELEMENTS[j++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[j++]}"
TMP_DIR="${XPATH_ELEMENTS[j++]:-$DS_TMP_DIR}"
SRC="${XPATH_ELEMENTS[j++]}"
MD5="${XPATH_ELEMENTS[j++]}"
SHA1="${XPATH_ELEMENTS[j++]}"
IMAGE_TYPE="${XPATH_ELEMENTS[j++]}"
NO_DECOMPRESS="${XPATH_ELEMENTS[j++]}"
LIMIT_TRANSFER_BW="${XPATH_ELEMENTS[j++]}"

# ------------------------------------------------------------------------------
#  Set up datastore & transfer folder
# ------------------------------------------------------------------------------
#
#  DST is the final generated image SOURCE, e.g. /vmfs/volumes/104/834efd1/
#  DST_FOLDER is the image folder name, e.g. 834efd1
#  DST_HOST is the host to make the transfers (from BRIDGE_LIST)
#  TMP_FOLDER tmp folder to download images, e.g. /var/tmp/834efd1/
# ------------------------------------------------------------------------------

DST=`generate_image_path`

DST_FOLDER=`basename $DST`
DST_HOST=`get_destination_host $ID`

if [ -z "$DST_HOST" ]; then
    error_message "Datastore template missing 'BRIDGE_LIST' attribute."
    exit -1
fi

set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"

TMP_FOLDER="$TMP_DIR/$DST_FOLDER"

if [ ! -d $TMP_DIR ]; then
    mkdir -p $TMP_DIR
fi

# ------------------------------------------------------------------------------
#  Download Image to front-end
# ------------------------------------------------------------------------------

DOWNLOADER_ARGS=`set_downloader_args "$MD5" "$SHA1" "$NO_DECOMPRESS" "$LIMIT_TRANSFER_BW" "$SRC" "$TMP_FOLDER"`

COPY_COMMAND="$UTILS_PATH/downloader.sh $DOWNLOADER_ARGS"

case $SRC in
http://*|https://* )
    log "Downloading $SRC to the image repository"

    exec_and_log "$COPY_COMMAND" "Error copying $SRC to $TMP_FOLDER"
    SRC="$TMP_FOLDER"
    ;;

*)
    if [ `check_restricted $SRC` -eq 1 ]; then
        log_error "Not allowed to copy images from $RESTRICTED_DIRS"
        error_message "Not allowed to copy image file $SRC"
        exit -1
    fi

    if is_cdrom; then
        log "Copying local CD-ROM $SRC to the image repository"
    elif [ -d $SRC ]; then
        log "Copying local disk folder $SRC to the image repository"
    else
        exec_and_log "$COPY_COMMAND" "Error copying $SRC to $TMP_FOLDER"
        SRC="$TMP_FOLDER"
    fi
    ;;
esac

# ------------------------------------------------------------------------------
#  Make the final hop, front-end -> VMFS Datastore
# ------------------------------------------------------------------------------

if [ -d "$SRC" -a ! -f "$SRC/disk.vmdk" ]; then
    BASE_DISK_FILE=`ls $SRC | grep '\.vmdk$' | grep -v '\-\(flat\|delta\|s[0-9]*\)\.vmdk$'`

    exec_and_log "mv -f $SRC/$BASE_DISK_FILE $SRC/disk.vmdk" \
                 "Error renaming file $SRC/$BASE_DISK_FILE to $SRC/disk.vmdk"
fi

if ! is_cdrom; then
    exec_and_log  "ssh_make_path $DST_HOST $DST" \
                  "Cannot create $DST in $DST_HOST"

    exec_and_log "$SCP -r $SRC/* $DST_HOST:$DST" \
                 "Error copying $SRC to $DST through SCP"
else
    exec_and_log "$SCP $SRC $DST_HOST:$DST" \
                 "Error copying $SRC to $DST through SCP"
fi

if [ -d "$TMP_FOLDER" -a -n "$DST_FOLDER" ]; then
    rm -rf "$TMP_FOLDER" > /dev/null 2>&1
fi

# ------------------------------------------------------------------------------
#  Send SOURCE to OpenNebula core
# ------------------------------------------------------------------------------

echo "$DST"
