From f274328871cf6c75be082a559eb5892d950b1f78 Mon Sep 17 00:00:00 2001
From: osmarks <osmarks@protonmail.com>
Date: Fri, 27 Jul 2018 10:26:37 +0100
Subject: [PATCH] Implement cached lookup because rednet is stupid

---
 lib.lua | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib.lua b/lib.lua
index c3270f5..1672706 100644
--- a/lib.lua
+++ b/lib.lua
@@ -64,6 +64,17 @@ end
 
 local protocol = "wyvern"
 
+local lookup_cache = {}
+
+local function cached_lookup(protocol)
+    if lookup_cache[protocol] then return lookup_cache[protocol]
+    else 
+        local ID = rednet.lookup(protocol)
+        lookup_cache[protocol] = ID
+        return ID
+    end
+end
+
 local function init_screen(scr, bg, fg)
     scr.setCursorPos(1, 1)
     scr.setBackgroundColor(bg)
@@ -145,7 +156,7 @@ local function query_by_ID(ID, request, max_tries)
 end
 
 local function query_by_type(type, request, tries)
-    local ID = rednet.lookup(protocol .. "/" .. type)
+    local ID = cached_lookup(protocol .. "/" .. type)
     if not ID then return errors.make(errors.NOMATCHINGNODE, type) end
     return query_by_ID(ID, request, tries)
 end