TurtiLib toggle item

local storage
local save
local selected

local ID_ITEM_PICKAXE = "minecraft:diamond_pickaxe"
local ID_ITEM_ENDER_MODEM = "computercraft:wireless_modem_advanced"

local api = {}

local function getItemName(id)
    local name = turtle.getItemDetail(id)
    if name == nil then
        return nil
    end
    return name.name
end

local toggleItemSwitchToPickaxeHook = function()
    local slot = storage.slot
    ThreadManager.blockExecutionOfOtherThreads()
    if slot ~= nil and getItemName(slot + 1) == ID_ITEM_PICKAXE then
        local selectedSlot = turtle.getSelectedSlot()
        turtle.select(slot + 1)
        if storage.side == "right" then
            turtle.equipRight()
        else
            turtle.equipLeft()
        end
        printDebug("switched to pickaxe", getItemName(slot + 1))
        turtle.select(selectedSlot)
    end
    ThreadManager.unblockExecutionOfOtherThreads()
end

local toggleItemSwitchToModemHook = function()
    local slot = storage.slot
    ThreadManager.blockExecutionOfOtherThreads()
    if slot ~= nil and getItemName(slot + 1) == ID_ITEM_ENDER_MODEM then
        local selectedSlot = turtle.getSelectedSlot()
        turtle.select(slot + 1)
        if storage.side == "right" then
            turtle.equipRight()
        else
            turtle.equipLeft()
        end
        printDebug("switched to modem", getItemName(slot + 1))
        turtle.select(selectedSlot)
    end
    ThreadManager.unblockExecutionOfOtherThreads()
end

installPreExecutionHook(turtle, "dig", "lib:toggleItem", toggleItemSwitchToPickaxeHook)
installPreExecutionHook(turtle, "digUp", "lib:toggleItem", toggleItemSwitchToPickaxeHook)
installPreExecutionHook(turtle, "digDown", "lib:toggleItem", toggleItemSwitchToPickaxeHook)
installPreExecutionHook(rednet, "open", "lib:toggleItem", toggleItemSwitchToModemHook)
installPreExecutionHook(rednet, "isOpen", "lib:toggleItem", toggleItemSwitchToModemHook)
installPreExecutionHook(rednet, "receive", "lib:toggleItem", toggleItemSwitchToModemHook)
installPreExecutionHook(rednet, "send", "lib:toggleItem", toggleItemSwitchToModemHook)
installPreExecutionHook(rednet, "broadcast", "lib:toggleItem", toggleItemSwitchToModemHook)
installPreExecutionHook(peripheral, "find", "lib:toggleItem", toggleItemSwitchToModemHook)

installPreExecutionHook(gps, "locate", "lib:toggleItem", toggleItemSwitchToModemHook)

function api.configureItemSwitch(slot, side, idTool, idModem)
    if not idTool then
        idTool = ID_ITEM_PICKAXE
    end
    if not idModem then
        idModem = ID_ITEM_ENDER_MODEM
    end
    if side ~= "left" and side ~= "right" then
        error("invalid side, must be either 'left' or 'right'")
    end
    if storage.slot then
        invokeHook("unprotectSlot", storage.slot, "lib:toggleItem")
    end
    invokeHook("protectSlot", slot, "lib:toggleItem")
    storage.slot = slot
    storage.side = side
    storage.idTool = idTool
    storage.idModem = idModem
    save()
end

function api.getItemSwitchSlot()
    return storage.slot
end

function api.getItemSwitchSide()
    return storage.side
end

function api.getIdTool()
    return storage.idTool
end

function api.getIdModem()
    return storage.idModem
end

return {
    name = 'toggleItem',
    api = api,
    onInitStorage = function(_storage, _save)
        storage = _storage
        save = _save
    end,
    dependencies = {
        '7q32mZDG' -- protect slot
    }
}