loaderMulticart

Computer = {
    rednetSide = "back"
}

CartDetector = {
}
CartDetecter_mt = {__index = CartDetector}
function CartDetector:create()--{{{
    local new_cartDetector = {}
    setmetatable(new_cartDetector, CartDetector_mt)
    return new_cartDetector
end--}}}

CartHolder = {
}

function CartHolder:holdCart()--{{{
    rs.setOutput(self.side, false)
end--}}}
function CartHolder:releaseCart()--{{{
    rs.setOutput(self.side, true)
end--}}}

CartHolder_mt = {__index = CartHolder}
function CartHolder:create()--{{{
    local new_cartHolder = {}
    setmetatable(new_cartHolder, CartHolder_mt)
    return new_cartHolder
end--}}}

comp = Computer
rs.setBundledOutput(comp.rednetSide, 0)
cartDetLoader = CartDetector:create()--{{{
cartDetLoader.side = 'right'--}}}
cartDetLoaderLeave = CartDetector:create()--{{{
cartDetLoaderLeave.side = 'left'--}}}
cartHolderQueue1 = CartHolder:create()--{{{
cartHolderQueue1.side = "back"
cartHolderQueue1:releaseCart()--}}}
cartLoading = true

while true do
    event, param1, param2, param3 = os.pullEvent("redstone")
    print("arrive: " .. textutils.serialize(rs.getInput(cartDetLoaderLeave.side)))
    print("leave: " .. textutils.serialize(rs.getInput(cartDetLoaderLeave.side)))
    if rs.getInput(cartDetLoader.side) then -- on to loader
        print("Received cart arrive event")
        cartHolderQueue1:holdCart()
    end
    if rs.getInput(cartDetLoaderLeave.side) then
        print("Received cart leave event")
        cartHolderQueue1:releaseCart()
    end
end