#!/bin/bash

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

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"


function step_1 {
  echo -e "Updating apt\n"
  #apt update
}

function step_2 {
  echo -e "Installing: $librePackages\n"
  apt install $librePackages
  saveReturn $?
  endReturn 
}

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

function step_4 {
  echo -e "Adding librenms user"
  useradd librenms -d /opt/librenms -M -r
  saveReturn $?
  usermod -a -G librenms www-data
  saveReturn $?
  endReturn 
}

function step_5 {
  echo -e "Installing librenms using composer"
  cd /opt
  composer create-project --no-dev --keep-vcs librenms/librenms librenms dev-master
  saveReturn $?
  endReturn 
}

function step_10 {
  local mysqlDatabase
  local mysqlUser
  local mysqlPass

  echo "Setup mysql database"
  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;'
}

function step_11 {
  echo "MariaDB configuration"
  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"
}

function step_12 {
  echo "PHP fpm/cli configuration"
  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"
}

function step_40 {
  echo "Switch Librenms installation to monthly stable"
  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))"
}

function step_42 {
  echo "Fix librenms permission"
  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
}

help() {
  echo    "  Step Documentation"
  echo    "    1: Updating apt"
  echo -e "    2: Install packages:\n\t$librePackages"
  echo -e "    3: Installing -t buster PHP related packages:\n\t$librePhpDeps" 
  echo    "    4: Adding librenms user"
  echo    "    5: Installing librenms using composer"
  echo
  echo    "   10: Setup mysql database" 
  echo    "   11: MariaDB configuration"
  echo    "   12: PHP fpm/cli configuration"
  echo
  echo    "   40: Switch Librenms installation to monthly stable"
  echo    "   42: Fix librenms permission"
}

#
## Path to sequencer
. ../sequencer/sequencer.sh