From bfe28315a02745cc6b5c1c4696eedf6110c80fcf Mon Sep 17 00:00:00 2001
From: patrickkfkan <patrickkfkan@gmail.com>
Date: Sat, 23 Jan 2021 21:51:22 +0800
Subject: [PATCH] Cache discover options

---
 lib/index.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/index.js b/lib/index.js
index cc076b4..a9ec4f8 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -69,10 +69,16 @@ async function sanitizeDiscoverParams(params) {
 }
 
 async function getDiscoverOptions() {
+    if (cache.discoverOptions !== undefined) {
+        return cache.discoverOptions;
+    }
     const url = utils.getSiteUrl();
     return fetch(url)
         .then( res => res.text() )
-        .then( html => parser.parseDiscoverOptions(html) );
+        .then( html => {
+            cache.discoverOptions = parser.parseDiscoverOptions(html);
+            return cache.discoverOptions;
+        });
 }
 
 async function getImageFormat(idOrName) {