#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

#Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
source ../settings/scripts/_common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

ynh_clean_setup () {
	### Remove this function if there's nothing to clean before calling the remove script.
	true
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info --message="Loading installation settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)

#=================================================
# STANDARD BACKUP STEPS
#=================================================

ynh_print_info --message="Declaring files to be backed up..."

# N.B.: the following 'ynh_backup' calls are only a *declaration* of what needs
# to be backuped and not an actual copy of any file. The actual backup that
# creates and fill the archive with the files happens in the core after this
# script is called. Hence ynh_backups calls takes basically 0 seconds to run.

#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_print_info --message="Stopping a systemd service..."

ynh_systemd_action --service_name="grafana-server" --action="stop" --log_path="/var/log/grafana/grafana.log"

#=================================================
# BACKUP THE APP MAIN DIR
#=================================================
ynh_print_info --message="Backing up configuration directories..."

ynh_backup --src_path="/etc/influxdb"
ynh_backup --src_path="/etc/grafana"
ynh_backup --src_path="/var/lib/grafana/plugins"

#=================================================
# BACKUP THE NGINX CONFIGURATION
#=================================================
ynh_print_info --message="Backing up nginx web server configuration..."

ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"

#=================================================
# BACKUP THE MYSQL DATABASE
#=================================================
ynh_print_info --message="Backing up the MySQL database..."

# (However, things like mysql dumps *do* take some time to run, though the
# copy of the generated dump to the archive still happens later)
ynh_mysql_dump_db --database="$db_name" > db.sql

#=================================================
# SPECIFIC BACKUP
#=================================================

ynh_print_info --message="Backing up the InfluxDB database..."
# Backup InfluxDB data
# Source: http://stackoverflow.com/questions/39501416/how-to-restore-data-base-using-influxd
mkdir influxdb_data
# Backup only if database exists
# That happens when passing automated tests (NetData not present)
if [ -d "/var/lib/influxdb/data/opentsdb" ]; then
	influxd backup -database opentsdb influxdb_data
fi

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_print_info --message="Starting a systemd service..."

ynh_systemd_action --service_name="grafana-server" --action="start" --log_path="/var/log/grafana/grafana.log"

#=================================================
# END OF SCRIPT
#=================================================

ynh_print_info --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."