Refactor autoCompost function to improve dropper capacity checks and item management

inventoryManager.lua

@@ -1832,19 +1832,24 @@ local function autoCompost()
     local dropper = peripheral.wrap(COMPOST_DROPPER)
     if not dropper then return didWork end
 
-    -- Check how much space the dropper has
+    -- Check how much item capacity the dropper has (slots * 64 - current items)
     local dropperContents = dropper.list()
-    local dropperUsed = 0
+    local dropperUsedSlots = 0
+    local dropperUsedItems = 0
     if dropperContents then
-        for _ in pairs(dropperContents) do dropperUsed = dropperUsed + 1 end
+        for _, item in pairs(dropperContents) do
+            dropperUsedSlots = dropperUsedSlots + 1
+            dropperUsedItems = dropperUsedItems + item.count
+        end
     end
     local dropperSize = dropper.size()
-    local dropperFree = dropperSize - dropperUsed
+    local dropperFreeSlots = dropperSize - dropperUsedSlots
+    local dropperFreeItems = (dropperSize * 64) - dropperUsedItems
 
-    if dropperFree <= 0 then return didWork end
+    if dropperFreeItems <= 0 then return didWork end
 
     for _, itemName in ipairs(COMPOSTABLE) do
-        if dropperFree <= 0 then break end
+        if dropperFreeItems <= 0 then break end
         if catalogue[itemName] then
             -- Count total in storage
             local totalInStorage = 0
@@ -1854,7 +1859,7 @@ local function autoCompost()
 
             local available = totalInStorage - COMPOST_RESERVE
             if available > 0 then
-                local toFeed = math.min(available, dropperFree, 64)
+                local toFeed = math.min(available, dropperFreeItems)
                 local fed = 0
                 for _, source in ipairs(catalogue[itemName]) do
                     local chest = peripheral.wrap(source.chest)
@@ -1876,7 +1881,7 @@ local function autoCompost()
                     end
                     if fed >= toFeed then break end
                 end
-                dropperFree = dropperFree - fed
+                dropperFreeItems = dropperFreeItems - fed
             end
         end
     end