#!/bin/bash

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

toolName="LibreNMS"
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"


step_1_info() { echo "Updating apt"; }
step_1() {
  apt update
}

step_2_info() { echo -e "Installing $toolname dependencies: $librePackages\n"; }
step_2() {
  apt install $librePackages
  saveReturn $?
  endReturn 
}

step_3_info() { echo -e "Installing -t buster PHP related packages\n$librePhpDeps\n"; }
step_3() {
  apt -t buster install $librePhpDeps
  saveReturn $?
  endReturn 
}

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

step_5_info() { echo "Installing $toolName using composer"; }
step_5() {
  cd /opt
  composer create-project --no-dev --keep-vcs librenms/librenms librenms dev-master
  saveReturn $?
  endReturn 
}

step_10_info() { echo "Create mysql database for $toolName"; }
step_10() {
  local mysqlDatabase
  local mysqlUser
  local mysqlPass

  echo "Existing mysql databases:"
  mysql -u root -e 'SHOW DATABASES;'

  echo -en "Enter database name: " 
  read mysqlDatabase
  endCheckEmpty mysqlDatabase "database name"
  mysql -u root -e 'CREATE DATABASE '$mysqlDatabase' CHARACTER SET utf8 COLLATE utf8_unicode_ci;'
  saveReturn $?
  endReturn 

  echo "Existing mysql user:"
  mysql -u root -e 'SELECT User, Host FROM mysql.user;' 
  echo -en "Enter mysql user name: " 
  read mysqlUser
  endCheckEmpty mysqlDatabase "user name"

  echo -en "Enter mysql user password: " 
  read mysqlPass
  endCheckEmpty mysqlPass "password"
  mysql -u root -e 'CREATE USER '"'"$mysqlUser"'"'@'"'"'localhost'"'"' IDENTIFIED BY '"'"$mysqlPass"'"';'
  saveReturn $?
  endReturn 

  mysql -u root -e 'GRANT ALL PRIVILEGES ON '$mysqlDatabase'.* TO '"'"$mysqlUser"'"'@'"'"'localhost'"'"';'
  saveReturn $?
  endReturn 

  mysql -u root -e 'FLUSH PRIVILEGES;'
}

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/php.ini"
  echo
  echo "-------------------------------------------"
  echo "date.timezone = Europe/Berlin"
  echo "-------------------------------------------"
  echo
  echo "Restart php-fpm afterwards:"
  echo "service php7.3-fpm restart"
}

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() {
  chown -R librenms:librenms /opt/librenms
  setfacl -d -m g::rwx /opt/librenms/bootstrap/cache /opt/librenms/storage /opt/librenms/logs /opt/librenms/rrd
  chmod -R ug=rwX /opt/librenms/bootstrap/cache /opt/librenms/storage /opt/librenms/logs /opt/librenms/rrd
}

# Sequence Revision
VERSION_SEQREV=1

# Workaround when called from different directory
# Not needed when path to sequencer is absolut
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >>/dev/null 2>&1 && pwd )"
# Path to sequencer
. ${DIR}/../sequencer/sequencer.sh