Minecraft Modem Send

--Work in Progress
--Desc: A Modem program which attempts to send items from a connected inventory in the network to a different connected inventory in the network

--By: hornedcommando

function input()
    while true do
        write("from?\n")
        fromInv = peripheral.wrap(read())
        write("to?\n")
        toInv = peripheral.wrap(read())
        write("item? (Press Enter to specify none, if no item is specified all types will be sent)\n")
        --TODO: probably needs an item map, don't want to have to type out the full item name, should be colloquial like "coal" or "iron"
        item = read()
        write("amount? (Press Enter to specify none, if no amount is specified all will be sent\n")
        amount = tonumber(read())
        break
    end
end

function send(from, to, item, amount)
    --Check if from and to are valid peripherals
    if not peripheral.isPresent(from) then
        print("Error: No peripheral found on side " .. from)
        return
    end
    if not peripheral.isPresent(to) then
        print("Error: No peripheral found on side " .. to)
        return
    end
    --Check if from has an inventory
    local fromInv = peripheral.wrap(from)
    if not fromInv or not fromInv.list then
        print("Error: No inventory found on side " .. from)
        return
    end
    --Check if to has an inventory
    local toInv = peripheral.wrap(to)
    if not toInv or not toInv.list then
        print("Error: No inventory found on side " .. to)
        return
    end
    --Check if the item exists in from
    local itemSlot
    for slot, itemData in pairs(fromInv.list()) do
        if itemData.name == item then
            itemSlot = slot
            break
        end
    end
    if not itemSlot then
        print("Error: Item " .. item .. " not found in " .. from)
        return
    end

    --Check if there are enough items in from
    local itemCount = fromInv.getItemCount(itemSlot)
    if itemCount < amount then
        print("Error: Not enough " .. item .. " in " .. from)
        return
    end

    -- Push items from from to to
    fromInv.pushItems(peripheral.getName(to), itemSlot, amount)
    print("Sent " .. amount .. " " .. item .. " from " .. from .. " to " .. to)
end

input()
send(fromInv, toInv, item, amount)