randomblueprint.lua

function init()
  self.duplicateChance = config.getParameter("allowDuplicateChance")
  self.recipes = config.getParameter("recipes")
  self.swingTime = config.getParameter("swingTime")
  activeItem.setArmAngle(-math.pi / 2)
end

function update(dt, fireMode, shiftHeld)
  updateAim()

  if not self.swingTimer and fireMode == "primary" and player then
    self.swingTimer = self.swingTime
  end

  if self.swingTimer then
    self.swingTimer = math.max(0, self.swingTimer - dt)

    activeItem.setArmAngle((-math.pi / 2) * (self.swingTimer / self.swingTime))

    if self.swingTimer == 0 then
      learnBlueprint()
    end
  end
end

function learnBlueprint()
  local itemName = chooseRecipe(self.recipes)
  local i = 0
  if player.blueprintKnown(itemName) and math.random() > self.duplicateChance then
    while player.blueprintKnown(itemName) and i < 20 do
      itemName = chooseRecipe(self.recipes)
      i = i + 1
    end
  end

  if player.blueprintKnown(itemName) then
    player.giveItem(itemName .. "-recipe")
  else
    player.giveBlueprint(itemName)
  end

  animator.playSound("learnBlueprint")

  item.consume(1)
end

function chooseRecipe(recipeOrRecipes)
  if type(recipeOrRecipes) == "table" then
    local choice = recipeOrRecipes[math.random(1, #recipeOrRecipes)]
    return chooseRecipe(choice)
  else
    return recipeOrRecipes
  end
end

function updateAim()
  self.aimAngle, self.aimDirection = activeItem.aimAngleAndDirection(0, activeItem.ownerAimPosition())
  activeItem.setFacingDirection(self.aimDirection)
end