Scoring

# vibe: 0.4

def score_user(user)
  user[:score] * user[:weight]
end

def score_users(users)
  Tasks.map(users, max: 2, with: :score_user)
end

def summarize_users(users)
  scores = score_users(users)
  {
    scores: scores,
    total: scores.sum
  }
end

def prepare_user(user)
  "prepared:" + user[:id]
end

def prepare_pair(first, second)
  Tasks.run(max: 2) do |tasks|
    left = tasks.spawn(:prepare_user, first)
    right = tasks.spawn(:prepare_user, second)
    tasks.wait
    left_result = left.value
    right_result = right.value
    return [left_result, right_result]
  end
end

def run
  users = [
    { id: "u1", score: 10, weight: 2 },
    { id: "u2", score: 7, weight: 3 }
  ]

  {
    summary: summarize_users(users),
    prepared: prepare_pair(users[0], users[1])
  }
end