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Assignment: File Manager

Description

Your task is to implement File Manager using Node.js APIs.

The file manager should be able to do the following:

  • Work using CLI
  • Perform basic file operations (copy, move, delete, rename, etc.)
  • Utilize Streams API
  • Get information about the host machine operating system
  • Perform hash calculations
  • Compress and decompress files

Technical requirements

  • No external dependencies should be required
  • The program is started by npm-script start in following way:
npm run start -- --username=your_username
  • After starting the program displays the following text in the console
    Welcome to the File Manager, Username!
  • After program work finished the program displays the following text in the console
    Thank you for using File Manager, Username!
  • At the start and after each end of input/operation current working directory should be printed in following way:
    You are currently in path_to_working_directory
  • Starting working directory is current user's home directory (for example, on Windows it's something like system_drive/Users/username)
  • By default program should prompt user in console to print commands and wait for results
  • In case of unknown operation or invalid input Invalid input message should be shown and user should be able to enter another command
  • In case of error during execution of operation Operation failed message should be shown and user user should be able to enter another command
  • Attempt to perform an operation on a non-existent file or work on a non-existent path should result in the operation fail

List of operations and their syntax:

  • Navigation & working directory (nwd)
    • Go upper from current directory (when you are in the root folder this operation shouldn't change working directory)
    up
    • Go to dedicated folder from current directory (path_to_directory can be relative or absolute)
    cd path_to_directory
    • List all files and folder in current directory and print it to console
    ls
  • Basic operations with files
    • Read file and print it's content in console:
    cat path_to_file
    • Create empty file in current working directory:
    add new_file_name
    • Rename file:
    rn path_to_file new_filename
    • Copy file:
    cp path_to_file path_to_new_directory
    • Move file (same as copy but initial file is deleted):
    mv path_to_file path_to_new_directory
    • Delete file:
    rm path_to_file
  • Operating system info (prints following information in console)
    • Get EOL (default system End-Of-Line)
    os --EOL
    • Get host machine CPUs info (overall amount of CPUS plus model and clock rate (in GHz) for each of them)
    os --cpus
    • Get home directory:
    os --homedir
    • Get current system user name (Do not confuse with the username that is set when the application starts)
    os --username
    • Get CPU architecture for which Node.js binary has compiled
    os --architecture
  • Hash calculation
    • Calculate hash for file and print it into console
    hash path_to_file
  • Compress and decompress operations
    • Compress file (using Brotli algorytm)
    compress path_to_file path_to_destination
    • Decompress file (using Brotli algorytm)
    decompress path_to_file path_to_destination