api: add itemcount function

api/api.lua

@@ -98,6 +98,31 @@ function pfUI.api.GetItemLinkByName(name)
   end
 end
 
+-- [ GetItemCount ]
+-- Returns information about how many of a given item the player has.
+-- 'itemName'   [string]         name of the item
+-- returns:     [int]            the number of the given item
+function pfUI.api.GetItemCount(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
+
 -- [ Abbreviate ]
 -- Abbreviates a number from 1234 to 1.23k
 -- 'number'     [number]           the number that should be abbreviated