feat(turtle-utils): add compactInventory

libs/turtle-utils.lua

@@ -13,6 +13,15 @@ turtleUtils.getInventory = function(side)
   return nil
 end
 
+turtleUtils.getItemName = function(slotIndex)
+  local item = turtle.getItemDetail(i)
+  return item and item.name
+end
+
+turtleUtils.getItemCount = function(slotIndex)
+  return turtle.getItemCount(slotIndex)
+end
+
 local function waitFor(predicate, sleepTime)
   sleepTime = sleepTime or DEFAULT_IDLE_TIME
 
@@ -151,9 +160,7 @@ end
 
 turtleUtils.selectItemByName = function(itemName)
   for i = 1, 16, 1 do
-    local item = turtle.getItemDetail(i)
-
-    if item and item.name == itemName then
+    if itemName == turtleUtils.getItemName(i) then
       turtle.select(i)
       return true
     end
@@ -202,4 +209,63 @@ turtleUtils.refuelAllFromInventory = function()
   end
 end
 
+-- utils function used by "compactInventory"
+local function getItemsMap()
+  local result = {}
+
+  for i=1, 16, 1 do
+    local itemName = turtleUtils.getItemName(i)
+
+    if itemName then
+      local nbSlotUsed = result[itemName] or 0
+      result[itemName] = nbSlotUsed + 1
+    end
+  end
+
+  return result
+end
+
+local function getSlotsWithSpaces(itemName)
+  local slots = {}
+
+  for i=1, 16, 1 do
+    if turtleUtils.getItemName(i) == itemName then
+      if turtle.getItemSpace(i) > 0 then
+        table.insert(slots, i)
+      end
+    end
+  end
+
+  return slots
+end
+
+local function compactItem(itemName)
+  while true do
+    local slots = getSlotsWithSpaces(itemName)
+
+    if #slots < 2 then
+      break
+    end
+
+    turtle.select(slots[1])
+    turtle.transferTo(slots[2], turtle.getItemSpace(slots[2]))
+  end
+end
+
+-- Compact the internal turtle inventory
+turtleUtils.compactInventory = function()
+  local initialSelectedSlot = turtle.getSelectedSlot()
+  local itemsMap = getItemsMap()
+
+  for itemName, nbSlotUsed in pairs(itemsMap) do
+    if nbSlotUsed > 1 then
+      compactItem(itemName)
+    end
+  end
+
+  if initialSelectedSlot ~= turtle.getSelectedSlot() then
+    turtle.select(initialSelectedSlot)
+  end
+end
+
 return turtleUtils