helpers: add function to get item count

helpers.lua

@@ -171,7 +171,6 @@ ShaguTweaks.cmatch = function(str, pat)
   return ra, rb, rc, rd, re
 end
 
-
 local timer
 ShaguTweaks.QueueFunction = function(a1,a2,a3,a4,a5,a6,a7,a8,a9)
   if not timer then
@@ -338,3 +337,24 @@ end
 ShaguTweaks.spairs = function(t)
   return orderedNext, t, nil
 end
+
+ShaguTweaks.GetItemCount = function(itemName)
+  local count = 0
+  for bag = 4, 0, -1 do
+    for slot = 1, GetContainerNumSlots(bag) do
+      local _, itemCount = GetContainerItemInfo(bag, slot)
+      if itemCount then
+        local itemLink = GetContainerItemLink(bag,slot)
+        local _, _, itemParse = strfind(itemLink, "(%d+):")
+        local queryName = GetItemInfo(itemParse)
+        if queryName and queryName ~= "" then
+          if queryName == itemName then
+            count = count + itemCount
+          end
+        end
+      end
+    end
+  end
+
+  return count
+end