local db = {}

--#data_transform
function db.getMaterials()
    local materials = {}
    for k,_ in pairs(data.materials or {}) do
        materials[#materials+1] = k
    end
    return materials
end


--#data_transform
function db.getPrice(mat)
    return (data.materials or {})[mat]
end

--#data_transform
function db.getCurrencies()
    local currencies = {}
    for k,_ in pairs(data.currencies or {}) do
        currencies[#currencies+1] = k
    end
    return currencies
end

--#data_transform
function db.getCurrencyWorth(cur)
    return (data.currencies or {})[cur]
end

--#data_transform
function db.setPrice(mat,price)
    if not data.materials then data.materials = {} end
    data.materials[mat] = price
end

--#data_transform
function db.setWorth(cur,worth)
    if not data.currencies then data.currencies = {} end
    data.currencies[cur] = worth
end

--#data_transform
function db.getCurrencyUnit()
    return data.currency_unit or "cr"
end

--#data_transform
function db.setCurrencyUnit(unit)
    data.currency_unit = unit
end

return db