Add the new utils plugin, change entity spawning and the lookup command plugins to use it.

data/plugins/util/name-lookup.rb

@@ -0,0 +1,51 @@
+require 'java'
+
+# Looks up the id of the npc with the specified name.
+def lookup_npc(name)
+  return lookup_entity('npc', name)
+end
+
+# Looks up the id of the item with the specified name.
+def lookup_item(name)
+  return lookup_entity('item', name)
+end
+
+# Looks up the id of the object with the specified name.
+def lookup_object(name)
+  return lookup_entity('object', name)
+end
+
+# Looks up the id of an entity of the specified type (either 'npc', 'item', or 'object')
+def lookup_entity(type, symbol)
+  symbol = symbol.to_s
+  cached = NAME_CACHE[type + symbol]
+  return cached unless cached == nil
+
+  name = symbol.to_s.gsub('_', ' ')
+  if name.include?(' ')
+    id = name[name.rindex(' ') + 1, name.length - 1].to_i
+  end
+  id = find_entities(type, name, 1).first if id == nil || id == 0
+  
+  if id == nil
+    raise "The #{type} called #{name} could not be identified."
+  end
+
+  NAME_CACHE[type + symbol] = id
+  return id
+end
+
+# Finds entities with the specified type (e.g. npc) and name, returning possible ids as an array.
+def find_entities(type, name, limit=5)
+  ids = []; name.downcase!
+
+  Kernel.const_get("#{type.capitalize}Definition").definitions.each do |definition|
+    break if ids.length == limit
+    ids << definition.id.to_i if definition.name.to_s.downcase == name
+  end
+
+  return ids
+end
+
+private
+NAME_CACHE = {}