Craft blocks 7.7.6+

--set to gui open event
local args = {...}
if args[1] ~= "event" or args[2] ~= "GUIOpened" then
  log("&7Block crafting script should be set to the GUIOpened event")
  return
end
if args[4] ~= "crafting table" then
  return
end

local item = "minecraft:iron_ingot"
local inv  = openInventory()
local map  = inv.mapping[args[4]]

local function findItem( inv, map, itemName )
  local matches = {}
  local n = 1
  for a,b in pairs( map.main ) do
    local item = inv.getSlot(b)
    if item and item.id==itemName then
      matches[n] = b
      n = n+1
    end
  end
  for a,b in pairs( map.hotbar ) do
    local item = inv.getSlot(b)
    if item and item.id==itemName then
      matches[n] = b
      n = n+1
    end
  end
  return matches
end



local function craftBlocks( inv, map, itemName )
  local matches = findItem( inv, map, itemName )
  while #matches >= 9 and args[3].isOpen() do
    local ready = true
    repeat
      ready = true
      matches = findItem( inv, map, itemName )
      for i = 1, 9 do
        if not inv.getSlot(map.craftingIn[i]) then
          ready = false
          inv.click( table.remove(matches,1))
          inv.click( map.craftingIn[i] )
          waitTick()
        end
      end
    until(ready)
    waitTick()
    inv.quick(map.craftOut )
  end
end

craftBlocks( inv, map, item )