Module:Mmgtable2

Documentation for this module may be created at Module:Mmgtable2/doc

local p = {}

-- Maximum allowed entries
local MAX_INPUTS = 75
local MAX_OUTPUTS = 75

-- Main function to return only the profit as a number
function p.profit(frame)
    local args = frame:getParent().args

    local inputs = calculateTotal(args, 'Input', MAX_INPUTS)
    local outputs = calculateTotal(args, 'Output', MAX_OUTPUTS)

    local profit = outputs - inputs
    return tostring(profit)
end

-- Calculates total value from prefixed args (Input/Output)
function calculateTotal(args, prefix, max)
    local total = 0

    for i = 1, max do
        local name = args[prefix .. i]
        if not name or name == '' then break end

        local qty = tonumber(args[prefix .. i .. 'num']) or 1
        local value = tonumber(args[prefix .. i .. 'value']) or 0

        total = total + (qty * value)
    end

    return total
end

return p