milo: improve list perf

milo/apis/miniAdapter.lua

@@ -0,0 +1,57 @@
+local class   = require('class')
+local itemDB  = require('itemDB')
+local Util    = require('util')
+
+local device = _G.device
+
+local Adapter = class()
+
+function Adapter:init(args)
+  if args.side then
+    local inventory = device[args.side]
+    if inventory then
+      Util.merge(self, inventory)
+    end
+  end
+end
+
+function Adapter:listItems(throttle)
+  local cache = { }
+  throttle = throttle or Util.throttle()
+
+  for k,v in pairs(self.list()) do
+    if v.count > 0 then
+      local key = table.concat({ v.name, v.damage, v.nbtHash }, ':')
+
+      local entry = cache[key]
+      if not entry then
+        local cached = itemDB:get(v)
+        if cached then
+          cached = Util.shallowCopy(cached)
+        else
+          cached = self.getItemMeta(k)
+          if cached then
+            cached = Util.shallowCopy(itemDB:add(cached))
+          end
+        end
+        if cached then
+          entry = cached
+          entry.count = 0
+          cache[key] = entry
+        else
+          _G._debug('Adapter: failed to get item details')
+        end
+      end
+
+      if entry then
+        entry.count = entry.count + v.count
+      end
+      throttle()
+    end
+  end
+  itemDB:flush()
+
+  self.cache = cache
+end
+
+return Adapter