#! /bin/bash
#
# Copyright (C) 2019 Laurent Poujoulat <lpoujoulat@april.org>
#
# This file is part of valise.chapril.org
#
# This script is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# ============================================
# This scripts reads the nextcloud state, extract the main status variables
# and writes a plain text report on stdout
# ============================================

# Configuration data
CURL_CREDENTIAL="/etc/valise.chapril.org/curl_credential"
VALISE_STATS_DIR="/var/lib/valise.chapril.org"
VALISE_STATS_FILE="${VALISE_STATS_DIR}/stats"
VALISE_BASE_DIR="/var/www/valise.chapril.org"
VALISE_UPDATER_DIR="${VALISE_BASE_DIR}/data/updater-oc30zo96k0y3"

# Extract a json value by path (given as argument)
# The global JSON state is expected to be in NEXTCLOUD_STATE
# Only give the path part within the ocs.data  section
getNcState()
{
	echo ${NEXTCLOUD_STATE} | jq ".ocs.data.$1"
}

# Format statistic value for the report
writeStatValue()
{
	local LABEL=$1
        local UNIT=$2
        local CUR_VALUE=$3
	local PREV_VALUE=$4
	local VARIATION=$(( ${CUR_VALUE}-${PREV_VALUE} ))

	if [ ${VARIATION} -gt 0 ]
	then 
		VARIATION="+"${VARIATION}
	fi

	if [ "${UNIT}" == "" ]
	then
		echo ${LABEL}": "${CUR_VALUE}" ("${VARIATION}")"
	else
		echo ${LABEL}": "${CUR_VALUE}" "${UNIT}" ("${VARIATION}")"
	fi
}


# Read and store the current service state
NEXTCLOUD_STATE=`curl --silent --netrc-file ${CURL_CREDENTIAL} http://localhost/ocs/v2.php/apps/serverinfo/api/v1/info?format=json`

# Extraction of Nextcloud important values
NB_OF_USERS=$(getNcState "nextcloud.storage.num_users")
NB_OF_FILES=$(getNcState "nextcloud.storage.num_files")
NB_OF_UPDATER_FILES=$(find ${VALISE_UPDATER_DIR} -type f|wc -l)
NB_OF_USER_FILES=$(( (${NB_OF_FILES}) - (${NB_OF_UPDATER_FILES}) - 4 ))
NB_OF_SHARES=$(getNcState "nextcloud.shares.num_shares")
USED_DISK_BYTES=$(du -sb "${VALISE_BASE_DIR}/data"|cut -f 1)
USED_DISK_GB=$(( (${USED_DISK_BYTES}) / (1024*1024*1024) ))
USED_DISK_USER_BYTES=$(du -sb --exclude="${VALISE_UPDATER_DIR}" --exclude="${VALISE_BASE_DIR}/data/*.log"  "${VALISE_BASE_DIR}/data"|cut -f 1)
USED_DISK_USER_GB=$(( (${USED_DISK_USER_BYTES}) / (1024*1024*1024) ))
FREE_DISK_GB=$(( $(getNcState "nextcloud.system.freespace") / (1024*1024*1024) ))
DATABASE_SIZE_MB=$(( $(getNcState "server.database.size") / (1024*1024) ))


# Get previous values
NB_OF_USERS_P=0
NB_OF_FILES_P=0
NB_OF_USER_FILES_P=0
NB_OF_SHARES_P=0
USED_DISK_GB_P=0
USED_DISK_USER_GB_P=0
FREE_DISK_GB_P=0
DATABASE_SIZE_MB_P=0

if [ -e ${VALISE_STATS_FILE} ]
then
	source ${VALISE_STATS_FILE}
fi

# Save current values for the next run
mkdir -p ${VALISE_STATS_DIR}
echo "NB_OF_USERS_P="${NB_OF_USERS} >> ${VALISE_STATS_FILE}
echo "NB_OF_FILES_P="${NB_OF_FILES} >> ${VALISE_STATS_FILE}
echo "NB_OF_USER_FILES_P="${NB_OF_USER_FILES} >> ${VALISE_STATS_FILE}
echo "NB_OF_SHARES_P="${NB_OF_SHARES} >> ${VALISE_STATS_FILE}
echo "USED_DISK_GB_P="${USED_DISK_GB} >> ${VALISE_STATS_FILE}
echo "USED_DISK_USER_GB_P="${USED_DISK_USER_GB} >> ${VALISE_STATS_FILE}
echo "FREE_DISK_GB_P="${FREE_DISK_GB} >> ${VALISE_STATS_FILE}
echo "DATABASE_SIZE_MB_P="${DATABASE_SIZE_MB} >> ${VALISE_STATS_FILE}


# Generate report
echo "Rapport d'activité du service valise.chapril.org au "`date "+%-d %B %Y"`
echo
echo "================================================================="
echo
writeStatValue "Nombre d'utilisateurs" "" ${NB_OF_USERS} ${NB_OF_USERS_P}
writeStatValue "Nombre total de fichiers" "" ${NB_OF_FILES} ${NB_OF_FILES_P}
writeStatValue "Nombre de fichiers utilisateurs" "" ${NB_OF_USER_FILES} ${NB_OF_USER_FILES_P}
writeStatValue "Nombre de partages" "" ${NB_OF_SHARES} ${NB_OF_SHARES_P}
writeStatValue "Espace disque occupé total" "Go" ${USED_DISK_GB} ${USED_DISK_GB_P}
writeStatValue "Espace disque occupé par les utilisateurs" "Go" ${USED_DISK_USER_GB} ${USED_DISK_USER_GB_P}
writeStatValue "Espace disque disponible" "Go" ${FREE_DISK_GB} ${FREE_DISK_GB_P}
writeStatValue "Espace occupé par la base de données" "Mo" ${DATABASE_SIZE_MB} ${DATABASE_SIZE_MB_P}

# Addition des infos HTTP
/srv/valise.chapril.org/tools/rapports_activites/rapport_activites_http.sh -p