Patch 5 - expand ents api

lua/starfall/libs_sh/ents_npc.lua

@@ -0,0 +1,42 @@
+-------------------------------------------------------------------------------
+-- NPC functions.
+-------------------------------------------------------------------------------
+
+assert(SF.Entities)
+
+SF.NPC = {}
+local npc_methods, npc_metamethods = SF.Typedef("NPC", SF.Entities.Metatable)
+
+SF.NPC.Methods = npc_methods
+SF.NPC.Metatable = npc_metamethods
+
+-- Overload entity wrap functions to handle NPC
+local dsetmeta = debug.setmetatable
+local old_ent_wrap = SF.Entities.Wrap
+function SF.Entities.Wrap(obj)
+	local w = old_ent_wrap(obj)
+	if type(obj) == "NPC" then
+		dsetmeta(w, npc_metamethods)
+	end
+	return w
+end
+
+local function isValid(entity)
+	return (SF.Entities.IsValid(entity) and entity:IsNPC())
+end
+
+-- ------------------------- Entity Methods ------------------------- --
+
+local ents_methods = SF.Entities.Methods
+local ents_metatable = SF.Entities.Metatable
+
+local wrap, unwrap = SF.Entities.Wrap, SF.Entities.Unwrap
+
+function ents_methods:isNPC( )
+	SF.CheckType( self, ents_metatable )
+	local ent = SF.Entities.Unwrap( self )
+	if not SF.Entities.IsValid(ent) then return false, "invalid entity" end
+	return ent:IsNPC( )
+end
+
+-- ------------------------- NPC Methods ------------------------- --