refuel function

-- A replacement refuelling function, it can be passed two arguments.
-- "silentVar" is boolean to determine if you want it to tell you what it is doing default true.
-- "check" can be any non nil/false value that will have it only check fuel without actually refuelling.
-- All iterations will set global fuel level variable, working on making it turtle specific.
function refuel(silentVar, check)
    local limit = 1000
    local level = tonumber(turtle.getFuelLevel())
    local doCheck = check
    local silent = silentVar
    local fuelNeeded = math.ceil((limit - turtle.getFuelLevel()) / 80) -- Does some math to determine number of fuel items it needs, expects fuel value of 80 gained via mining.
    if (silent == "false") then silent = false; else silent = true; end

    if (doCheck) then -- If you are just checking fuel level wont refuel
        if (not silent) then print("Fuel Level : "..level) end
        fuelLevel = turtle.getFuelLevel() --first set of global fuelLevel variable
        return
    else
        if (level >= limit) then -- If you are already over the limit of fuel will not attempt to get more.
            if (not silent) then print("Fuel level : "..level) end
            fuelLevel = turtle.getFuelLevel()
            return true
        end
        if (not silent) then print("Standby : Beginning refuelling process.") end -- Begins refuelling process.
        for i=1, 16 do
            turtle.select(i)
            if (turtle.refuel(0)) then -- Determines if item in slot is fuel.
                local slotCount = tonumber(turtle.getItemCount(i)) -- If it is fuel counts how many there are.
                if (fuelNeeded > slotCount) then -- If it needs more fuel than is in that slot will just consume all fuel available
                    turtle.refuel()
                    if (not silent) then print("Consuming "..slotCount.." fuel.") end
                    fuelNeeded = math.ceil((limit - turtle.getFuelLevel()) / 80)
                    level = turtle.getFuelLevel()
                elseif (fuelNeeded < slotCount) then -- If there is more fuel in the slot than is needed will only consume needed ammount
                    turtle.refuel(fuelNeeded)
                    if (not silent) then print("Consuming "..fuelNeeded.." fuel.") end
                    level = turtle.getFuelLevel()
                end
            end
            if (level >= limit) then -- Checks to see if it has reached its limit if so breaks for loop
                turtle.select(1)
                if (not silent) then print("Refuelling finished.") end
                if (not silent) then print("Fuel level : "..level) end
                fuelLevel = turtle.getFuelLevel()
                return true
            end
            if (i == 16 and level < limit and not turtle.refuel(0)) then
                if (not silent) then print("Not enough fuel available.") end
                if (not silent) then print("Fuel level : "..level) end
                turtle.select(1)
                return false
            end
        end
    end
end

local args = {...};
refuel(args[1],args[2])