Advent of Code: Neovim Christmas Elf who fetches puzzle input

Intro

If you're like me and you don't want to copy and paste puzzle input from the web page every single time, this could be something you might find handy.

There are other CLI tools that accomplish the same task, none I could see for Neovim. Inspirations include:

• CLI written in Rust
• CLI written in Python

I'd like to stay within Neovim for as long as I could possibly get away with doing so. Hence, this plugin.

In the true developer fashion, I started with one task to solve Advent of Code puzzles, I ended up talking myself into "Let's spend a day or two to write a tool that saves me ... 5s of copy and paste task". Here we are.

Other features in the work

There are a number of features I'd like to add in the coming days/weeks to get to v1.0.0

• :AocSubmitAnswer to submit your answer.
• :AocGetSampleInput to write puzzle's sample input to file.
• :AocYankSampleInput to yank a puzzle's sample input to a register.

I am always open to any feedbacks and suggestions.

Requirements

This plugin requires a session token to communicate with adventofcode.com.

This is how you generate one:

1. Login to adventofcode.com.
2. Open Inspect panel, navigate to Storage tab.
3. Select cookies and copy session value.
4. Save to somewhere, e.g. /var/tmp/aoc.txt. Remeber to set appropriate permission, e.g chmod 600 or whatever you deem acceptable.
5. Update plugin config to set session_filepath attribute with the filepath above.

Installation

Let your favourite package manager (lazy.nvim) do the work:

-- lazy.nvim
return {
    "csessh/aoc.nvim",
    dependencies = { "nvim-lua/plenary.nvim" },
    opts = {}
},

Should you want to lazy load this plugin, you could add a condition check in its config:

cond = vim.fn.getcwd() == vim.fn.expand("your AOC directory path"),

Default configuration

--- Default configuration
---@type table
local default_opts = {
   session_filepath = "/var/tmp/aoc.txt", -- Default filepath to your AOC session token
   puzzle_input = { 
      filename = "puzzle.txt",            -- Default puzzle input filename
      save_to_current_dir = true,         -- Save puzzle input file to your current buffer's cwd() using {filename} attribute above
      alternative_filepath = nil,         -- This option is ONLY used when save_to_current_dir is set to false
                                          -- This option allows you to set a generic filepath for your puzzle input
                                          -- For example: ~/aoc/input.txt or ~/aoc/puzzle ...
   },
}

User command

This plugin provides the following user commands:

:AocGetPuzzleInput
:AocGetTodayPuzzleInput
:AocClearCache
:AocInspectConfig

AocGetPuzzleInput

This command takes two input from you: day and year.

It will then check cache to see if the puzzle input was previously downloaded to avoid unnecessasry requests to adventofcode.com

:AocGetPuzzleInput
Day: 8
Year: 2024
Successfully downloaded puzzle for input for Day 8 (2024)

AocGetTodayPuzzleInput

This command doesn't take any input from you. It simply gets the input for today's puzzle if it's unlocked.

It checks cache to see if the puzzle input was previously downloaded to avoid unnecessasry requests to adventofcode.com

:AocGetTodayPuzzleInput
Successfully downloaded puzzle for input for Day 11 (2024)

AocClearCache

This command wipes out all cached puzzle input files. In such case you decide to switch between accounts, your puzzle inputs will be different and cached input will be invalid.

:AocClearCache
Cache cleared

AocInspectConfig

This command allows you to quickly inspect the current plugin configuration.

:AocInspectConfig
{
   session_filepath = "/var/tmp/aoc.txt",
   puzzle_input = {
      filename = "puzzle.txt",
      save_to_current_dir = true,
      alternative_filepath = nil,
   },
}

Contribution

All contributions are most welcome! Please open a PR or create an issue.

Coding Style

• Follow the coding style of LuaRocks.
• Make sure you format the code with StyLua before PR.