#!/bin/bash

function chandir {
    echo 'Please enter the name of directory you want to change to: '
    read nameofd
    cd $nameofd 2>> error_log
    if [ "$?" = "0" ]; then
        echo 'OK'
    else
        echo 'No such directory'
    fi
}

function createdir {
    echo 'Please enter the name of directory which you want to create: '
    read nameofcd
    mkdir $nameofcd
}

function removedir {
    echo 'Please enter the name of directory which you want to delete: '
    read nameofrd
    if [ -d $nameofrd ]; then
        echo "Are you sure that you want to remove $nameofrd (y/yes - if yes)"
        read cond
        if  [ $cond = "y" ] || [ $cond = "yes" ]; then
            rm -r $nameofrd
        else
            echo "Directory wasn't removed"
        fi
    else
        rm -r $nameofrd 2>> error_log
        echo 'No such directory'
    fi
}

while true
do
    echo '
Select menu option:
1. current directory
2. change directory
3. print content of current directory
4. create directory
5. remove directory
6. exit
    '
    read menu
    case $menu in
        1)
        pwd
        ;;
        2)
        chandir
        ;;
        3)
        ls -la
        ;;
        4)
        createdir
        ;;
        5)
        removedir
        ;;
        6)
        exit 0
        ;;
        *)
        echo 'Invalid input'
        ;;
    esac
done