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Scoring: Data Processing CLI

Max total score: 250

Basic Scope

  • +6 Application starts with npm run start and displays welcome message
  • +10 Application exits gracefully with .exit command or Ctrl+C and displays goodbye message
  • +6 Current working directory is printed at startup and after each successful operation
  • +10 Unknown or invalid commands display Invalid input and application continues running
  • +10 Operations that fail display Operation failed and application continues running

Navigation Commands

  • +8 up command moves up one directory level correctly
  • +8 cd command navigates to specified directory (both relative and absolute paths)
  • +12 ls command lists files and folders with proper sorting (folders first, then files, alphabetically)

Data Processing Commands

  • +20 csv-to-json command works correctly (headers parsed, rows converted to objects, output is valid JSON array, uses Streams)
  • +20 json-to-csv command works correctly (headers from object keys, values as rows, uses Streams)
  • +12 count command works correctly (lines, words, characters counted via Streams, output format matches specification)
  • +12 hash command works correctly (SHA256 by default, supports md5 and sha512 via --algorithm option, uses Streams, supports --save to write hash file next to input)
  • +8 encrypt command works correctly (AES-256-GCM, key derivation from password+salt, Streams, output format matches spec)
  • +8 decrypt command works correctly (AES-256-GCM, key derivation from password+salt, Streams, authTag verified, result matches original)

Path Resolution

  • +16 All file paths in commands are correctly resolved relative to current working directory
  • +10 All file operations properly handle errors (non-existent files, invalid paths, permission errors)

Advanced Scope

  • +28 log-stats command works correctly:
    • +6 File is split into chunks equal to the number of CPU cores (line boundaries preserved)
    • +10 Each chunk is processed in a separate Worker Thread
    • +6 Partial stats are merged correctly (counters, maps, totals)
    • +6 Final output JSON matches the specification
  • +16 Project structure follows the specification (separate files for navigation, commands, utilities, worker)
  • +20 Interactive REPL implementation:
    • +10 Maintains application state (current working directory) across commands
    • +10 Properly handles readline for continuous command input
  • +10 hash-compare command works correctly (reads expected hash from file, computes current hash with selected algorithm, returns OK / MISMATCH)

Forfeits

  • -95% of total task score Any external tools/libraries are used
  • -30% of total task score Commits after deadline (except commits that affect only Readme.md, .gitignore, etc.)
  • -20 Missing PR or its description is incorrect
  • -20 No separate development branch
  • -20 Less than 3 commits in the development branch, not including commits that make changes only to Readme.md or similar files (tsconfig.json, .gitignore, .prettierrc.json, etc.)