#!/bin/bash

#
## Installation and maintenance for LibreNMS
## Using buster repositories for php 7.3 installation

toolName="librenms"
phpVersion=

libreDeps="acl curl composer fping git graphviz imagemagick mtr-tiny nmap rrdtool snmp snmpd whois python3-dotenv python3-pymysql python3-redis python3-setuptools"

librePhpDeps='php${phpVersion}-cli php${phpVersion}-curl php${phpVersion}-fpm php${phpVersion}-gd php${phpVersion}-json php${phpVersion}-mbstring php${phpVersion}-mysql php${phpVersion}-snmp php${phpVersion}-xml php${phpVersion}-zip'

#librePhpDeps="composer php-cli-prompt php-composer-ca-bundle php-composer-semver php-composer-spdx-licenses php-json-schema php-psr-log php-symfony-console php-symfony-filesystem php-symfony-finder php-symfony-polyfill-mbstring php-symfony-process"
#librePackages="fping git graphviz imagemagick mtr-tiny nmap python-memcache python-mysqldb rrdtool snmp snmpd whoisi nagios-plugins"

# Get script working directory
# (when called from a different directory)
WDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >>/dev/null 2>&1 && pwd )"
CONFIG=0
SCRIPT_NAME=$(basename -- "$0")
SCRIPT_NAME=${SCRIPT_NAME%%.*}
CONFIG_FILE_NAME="${SCRIPT_NAME}.cfg"
CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"

step_config() {
  initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
  if [ $? -eq 0 ] ; then
    CONFIG=1
    echo "     Install: $LNMS_DIR"
    echo "      Backup: $LNMS_BU_DIR"
  else
    exit 1
  fi
}

step_1_info() { echo "Updating apt"; }
step_1_alias() { ALIAS="install"; }
step_1() {
  exe apt update
}

step_2_info() { 
  echo "Installing $toolname dependencies:"
  echoinfo "$libreDeps"
}
step_2() {
  exe apt install $librePackages
  endReturn -o $? "Failed to install $toolName dependencies"
}

step_3_info() {
  echo "Installing PHP related packages:"
  fetchPhpVersion
  echoinfo `eval echo "$librePhpDeps"`
}
step_3() {
  fetchPhpVersion
  exe apt install `eval echo "$librePhpDeps"`
  endReturn -o $? "Failed to install $toolName php dependencies"
}

step_4_info() { echo "Adding $toolName user (librenms:librenms)"; }
step_4() {
  exe useradd librenms -d /opt/librenms -M -r
  saveReturn $?
  exe usermod -a -G librenms www-data
  saveReturn $?
  endReturn "Failed to create $toolName user"
}

step_5_info() { echo "Installing $toolName using composer"; }
step_5() {
  cd /opt
  exe composer create-project --no-dev --keep-vcs librenms/librenms librenms dev-master
  endReturn -o $? "Failed to install php dependencies"
}

step_10_info() { echo "Create mysql database for $toolName"; }
step_10() {
  ${WDIR}/mysql.sh -q createdb
  endReturn -o $? "Failed to create mysql database $LNMS_DB_NAME"
}

step_11_info() { echo "MariaDB configuration"; }
step_11() {
  echo
  echo "Edit or create /etc/mysql/mariadb.conf.d/90-myconfig.cnf and add:"
  echo
  echo "------------------------"
  echo "[mysqld]"
  echo "innodb_file_per_table=1"
  echo "lower_case_table_names=0"
  echo "------------------------"
  echo
  echo "Restart mysql afterwards:"
  echo "service mysql restart"
}

step_12_info() { echo "PHP fpm/cli configuration"; }
step_12() {
  echo
  echo "Ensure date.timezone is set in php.ini to your preferred time zone. See http://php.net/manual/en/timezones.php for a list of supported timezones. Valid examples are: \"America/New_York\", \"Europe/Berlin\", \"Etc/UTC\"."
  echo
  echo "vi /etc/php/7.3/fpm/conf.d/90-custom_pi.ini"
  echo "vi /etc/php/7.3/cli/conf.d/90-custom_pi.ini"
  echo
  echo "-------------------------------------------"
  echo "date.timezone = Europe/Berlin"
  echo "-------------------------------------------"
  echo
  echo "Restart php-fpm afterwards:"
  echo "service php7.3-fpm restart"
}

step_30_info() { echo "Backup ${toolName} web direcotry"; }
step_30_alias() { ALIAS="backup"; }
step_30() {
  [ $QUIET -ne 2 ] && echo " [I] Backup install directory ${LNMS_DIR}..."
  exep "cd \"${LNMS_DIR}\"/.. && tar czf \"${LNMS_BU_DIR}/\`date +%Y%m%d\`_${toolName}_web.tar.gz\" \"$(basename "$LNMS_DIR")\""
}

step_31_info() { echo "Backup ${toolName} database [daily|monthly(default)]"; }
step_31_alias() { ALIAS="backupdb"; }
step_31() {
  case "$2" in
    daily|Daily|DAILY)
      [ $QUIET -ne 2 ] && echo " [I] Daily backup..."
      exep "mysqldump --single-transaction -u root ${LNMS_DB_NAME} | bzip2 -c > \"${LNMS_BU_DIR}/${toolName}_daily.sql.bz2\""
      ;;
    *)
      [ $QUIET -ne 2 ] && echo " [I] Monthly backup..."
      exep "mysqldump --single-transaction -u root ${LNMS_DB_NAME} | bzip2 -c > \"${LNMS_BU_DIR}/monthly/\`date +%Y%m%d\`_${toolName}.sql.bz2\""
      ;;
  esac
}

step_40_info() { echo "Switch $toolName installation to monthly stable"; }
step_40() {
  echo
  echo "Add following to /opt/librenms/config.php"
  echo
  echo "--------------------------------------"
  echo "\$config['update_channel'] = 'release';"
  echo "--------------------------------------"
  echo
  echo "Execute following command afterwards:"
  echo "cd /opt/librenms && git fetch --tags && git checkout \$(git describe --tags \$(git rev-list --tags --max-count=1))"
}

step_42_info() { echo "Fix librenms permission"; }
step_42_alias() { ALIAS="repair"; }
step_42() {
  exe chown -R librenms:librenms /opt/librenms
  exe setfacl -d -m g::rwx /opt/librenms/bootstrap/cache /opt/librenms/storage /opt/librenms/logs /opt/librenms/rrd
  exe chmod -R ug=rwX /opt/librenms/bootstrap/cache /opt/librenms/storage /opt/librenms/logs /opt/librenms/rrd
}

fetchPhpVersion() { 
  if [ ! -z $phpVersion ] ; then 
    return 0 
  fi 

  phpVersion="$(php -r 'echo PHP_MAJOR_VERSION.".".PHP_MINOR_VERSION;')" 
}

# Sequence Revision
VERSION_SEQREV=12
. /usr/local/bin/sequencer.sh