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local Recipe = require "Recipe"
local
function raw_materials_needed (quantity)
local recipe = Recipe[quantity.material]
if not recipe then
return {[quantity.material]=quantity.amount}
end
local total = {}
for _, input in pairs(recipe.input) do
local subtotal = raw_materials_needed(input)
for material, amount in pairs(subtotal) do
total[material] = (total[material] or 0) + amount * quantity.amount
end
end
return total
end
local
function pretty_print (acc)
for material, amount in pairs(acc) do
print(("%d\t%q"):format(amount, material))
end
end
return {
raw_materials_needed=raw_materials_needed,
pretty_print=pretty_print,
}
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