Games: Supervised Score Tracker

Mix.install([
  {:jason, "~> 1.4"},
  {:kino, "~> 0.8.0", override: true},
  {:youtube, github: "brooklinjazz/youtube"},
  {:hidden_cell, github: "brooklinjazz/hidden_cell"}
])

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Setup

Ensure you type the ea keyboard shortcut to evaluate all Elixir cells before starting. Alternatively you can evaluate the Elixir cells as you read.

Games: Supervised Score Tracker

Refactor your existing Games: Score Tracker module to be a named process and configure it with your Games Supervisor. Ensure your existing Games: Score Tracker test suite continue to pass. You may need to alter it slightly now that Games.ScoreTracker is a named process.

If you don’t already have a ScoreTracker module you can use the one below.

defmodule ScoreTracker do
  use GenServer

  def start_link(opts) do
    name = Keyword.get(opts, :name, __MODULE__)
    GenServer.start_link(__MODULE__, [], name: name)
  end

  def add(pid \\ __MODULE__, points) do
    GenServer.call(pid, {:add, points})
  end

  def get(pid \\ __MODULE__) do
    GenServer.call(pid, :get)
  end

  @impl true
  def init(_opts) do
    {:ok, 0}
  end

  @impl true
  def handle_call(:get, _from, state) do
    {:reply, state, state}
  end

  @impl true
  def handle_call({:add, points}, _from, state) do
    {:reply, state + points, state + points}
  end
end

Bonus: Track Scores

Whenever a player wins a round of Guessing Game, RockPaperScissors, or Wordle, increase the player’s score.

(Optional) Consider printing the current score every time you increment it to make debugging and visual display easier. (Optional) Each game can be worth the same amount of points, or you might vary the points depending on the game.

Bonus: Score Menu

In the previously implemented Games.Menu module, implement a Total Score option which prints the current total score. It should use the Games.ScoreTracker module to get the current score.

$ ./games
Select a game:
1. Guessing Game
2. Rock Paper Scissors
3. Wordle
4. Total Score
Select: 4
Your current session score: 3

Mark As Completed

file_name = Path.basename(Regex.replace(~r/#.+/, __ENV__.file, ""), ".livemd")

save_name =
  case Path.basename(__DIR__) do
    "reading" -> "games_supervised_score_tracker_reading"
    "exercises" -> "games_supervised_score_tracker_exercise"
  end

progress_path = __DIR__ <> "/../progress.json"
existing_progress = File.read!(progress_path) |> Jason.decode!()

default = Map.get(existing_progress, save_name, false)

form =
  Kino.Control.form(
    [
      completed: input = Kino.Input.checkbox("Mark As Completed", default: default)
    ],
    report_changes: true
  )

Task.async(fn ->
  for %{data: %{completed: completed}} <- Kino.Control.stream(form) do
    File.write!(
      progress_path,
      Jason.encode!(Map.put(existing_progress, save_name, completed), pretty: true)
    )
  end
end)

form

Commit Your Progress

Run the following in your command line from the curriculum folder to track and save your progress in a Git commit. Ensure that you do not already have undesired or unrelated changes by running git status or by checking the source control tab in Visual Studio Code.

$ git checkout -b games-supervised-score-tracker-exercise
$ git add .
$ git commit -m "finish games supervised score tracker exercise"
$ git push origin games-supervised-score-tracker-exercise

Create a pull request from your games-supervised-score-tracker-exercise branch to your solutions branch. Please do not create a pull request to the DockYard Academy repository as this will spam our PR tracker.

DockYard Academy Students Only:

Notify your teacher by including @BrooklinJazz in your PR description to get feedback. You (or your teacher) may merge your PR into your solutions branch after review.

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