#!/bin/bash
############################################################
# Decription: manage user in directory
#             
# Author: Gilles Mouchet (gilles.mouchet@gmail.com)
# Creation Date: 27-Dec-2024
# Version: 1.0
# Install: 
#   see README.md
# Usage: ./manage_user.sh --help
# Changelog:
#    V1.0 - 28-Dec-2024 - GMo
#      Added
#      - Creation of script from scratch
#
############################################################ 

# debug
#set -x

#------------------------------------------------------------------------------
# printUsge
function printUsage {
    /bin/cat << EOF

Usage: $progName [options]

Options:
  -a <user_cn>,--add <user_cn> Add user in the directory
                               IMPORTANT: The first and last name are separated by a space. 
                               Spaces in the first and last name must be replaced by hyphens. 
                               Examples: Von Doe becomes Van-Doe
  -d <user_cn>,--del=<user_cn> Deleted user from directory                 
  -h,--help                    Show this help
  -v,--version                 Show version

Examples:
  Add user
    $progName -a "Yvan Descloux"
    $progName --add="John Von-Doe"

  Delete user John Von-Doe
    $progName -d "John Von-Doe"

 Delete user Yvan Descloux   
    $progName --del="Yvan Descloux"

EOF
}

#------------------------------------------------------------------------------
# addUser
function addUser {
# check if the format is coorect
  if [ $(echo $user_to_add | grep -o " " | wc -l) != "1" ]; then
      echo "'$user_to_add' format is not correct"
      echo "The first name and last name must be separated by at least one space"
      exit 1
  fi
# parse cn 
  first_name=$(echo $user_to_add | cut -d' ' -f1)
  last_name=$(echo $user_to_add | cut -d' ' -f2)
# get next uidNumber
  getNextUidNumber
# set password (lastname)  
  user_pass=$(slappasswd -s $last_name)
# set home dir
  home_dir=${first_name:0:3}${last_name}
  lhome_dir=$(echo "${home_dir,,}") #,, set lowercase
# set mail address
  email="${first_name,,}"."${last_name,,}"@$LDAP_USER_MAIL_DOMAIN
# add user in directory
  ldapadd -x -H $LDAP_SRV -D "$LDAP_MANAGER_USER" -w $LDAP_MANAGER_PASS <<EOF
dn: cn=$first_name $last_name,ou=people,$LDAP_BASE
cn: $first_name $last_name
displayName: $first_name $last_name
givenName: $first_name
sn: $last_name
objectClass: posixAccount
objectClass: inetOrgPerson
objectClass: shadowAccount
uid:  $first_name.$last_name
uidNumber: $next_uidNumber
gidNumber: $next_uidNumber
userPassword: $user_pass
mail: $email
homeDirectory: /home/$lhome_dir
EOF
}
#------------------------------------------------------------------------------
# delUser
function delUser {
    #echo $user_to_del
    # request confirmation
    echo -e "\nYou will DELETE 'cn=$user_to_del,ou=people,$LDAP_BASE' from the directory"
    read -p "Are you sure? " -n 1 -r
    echo -e "\n"
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        ldapdelete -x -H $LDAP_SRV -D "$LDAP_MANAGER_USER" -w $LDAP_MANAGER_PASS \
            "cn=$user_to_del,ou=people,$LDAP_BASE"
        if [ "$?" == "0" ]; then
            echo "$user_to_del successfully deleted from directory"
        fi
    fi    
}
#------------------------------------------------------------------------------
# main
# version
version="v1.0.0"
# script name
progName="./$(/bin/basename $0)"
# read all functios
source functions.sh
# read config
readConfig
# check that a parameter exists
if [ -z "$1" ]; then
    printUsage
    exit 1
fi 

while test $# -gt 0
do
  case "$1" in
    -a|--add*)
      # --add parameter    
      if [[ $1 =~ add= ]]; then
          user_to_add="$(echo $1 | cut -f2 -d=)"
          if [ -z "${user_to_add}" ]; then
              printUsage
              exit 1
          fi
          addUser
          shift
      # -a parameter
      else
          # check if argument from -a exist
          if [ -z "$2" ]; then
              printUsage
              exit 1
          fi 
          user_to_add="$2"
          addUser
          shift 2
      fi
    ;;
    -d|--del*)
      # --del parameter    
      if [[ $1 =~ del= ]]; then
          user_to_del="$(echo $1 | cut -f2 -d=)"
          if [ -z "${user_to_del}" ]; then
              printUsage
              exit 1
          fi
          delUser
          shift
      # -d parameter
      else
          # check if argument from -d exist
          if [ -z "$2" ]; then
              printUsage
              exit 1
           fi 
          user_to_del="$2"
          delUser
          shift 2
      fi
    ;;
    -h|--help|help)
      printUsage
      exit 0
    ;;
    -v|--version)
      echo "2022-$(date +Y) $progName $version"
      exit
    ;; 
    *)
      echo "${progName}: invalid option -- '$1'!"
      echo -e "Try '$progName --help' for more information.\n"
      exit 1
    ;;
  esac
done