From bfea4dbf5f119a1be3f120397fd1763698855de5 Mon Sep 17 00:00:00 2001
From: "R. Aidan Campbell" <aidan.campbell@gmail.com>
Date: Sat, 3 Sep 2016 13:51:56 -0400
Subject: [PATCH] added cache warming on startup

---
 static/js/index.js |  3 +--
 static/js/utils.js | 25 ++++++++++++++++++++++++-
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/static/js/index.js b/static/js/index.js
index 4a59148..c5a7b7a 100644
--- a/static/js/index.js
+++ b/static/js/index.js
@@ -74,9 +74,9 @@ function restoreUiAfterNaClLoad() {
 }
 
 function beginBackgroundPollingOfHost(host) {
+    host.warmBoxArtCache();
     if (host.online) {
         $("#hostgrid-" + host.serverUid).removeClass('host-cell-inactive');
-
         // The host was already online. Just start polling in the background now.
         activePolls[host.serverUid] = window.setInterval(function() {
             // every 5 seconds, poll at the address we know it was live at
@@ -90,7 +90,6 @@ function beginBackgroundPollingOfHost(host) {
         }, 5000);
     } else {
         $("#hostgrid-" + host.serverUid).addClass('host-cell-inactive');
-
         // The host was offline, so poll immediately.
         host.pollServer(function () {
             if (host.online) {
diff --git a/static/js/utils.js b/static/js/utils.js
index eb554d6..8edac61 100644
--- a/static/js/utils.js
+++ b/static/js/utils.js
@@ -293,12 +293,35 @@ NvHTTP.prototype = {
 
         return this.getAppListWithCacheFlush();
     },
+
+    warmBoxArtCache: function () {
+        if (Object.keys(this._memCachedBoxArtArray).length != 0) {
+            console.log('box art cache already warmed.');
+            return;
+        }
+        if (chrome.storage) {
+            chrome.storage.local.get('boxArtCache', function(JSONCachedBoxArtArray) {
+
+                var storedBoxArtArray;  // load cached data if it exists
+                if (JSONCachedBoxArtArray.boxArtCache != undefined) {
+                    storedBoxArtArray = JSONCachedBoxArtArray.boxArtCache;
+                    for (var key in storedBoxArtArray) {
+                        this._memCachedBoxArtArray[key] = _base64ToArrayBuffer(storedBoxArtArray[key]);
+                    }
+                    console.log('box art cache warmed.');
+                } else {
+                     console.log('WARN: no box art found in storage. Cannot warm cache!');
+                     return;
+                }
+            }.bind(this));
+        }
+    },
     
     // returns the box art of the given appID.
     // three layers of response time are possible: memory cached (in javascript), storage cached (in chrome.storage.local), and streamed (host sends binary over the network)
     getBoxArt: function (appId) {
 
-        // TODO: unfortunately we do N  lookups from storage cache, each of them filling up the memory cache.
+        // TODO: unfortunately we do N lookups from storage cache, each of them filling up the memory cache.
         // once the first round of calls are all made, each subsequent request hits this and returns from memory cache
         if (this._memCachedBoxArtArray[appId] !== undefined) {
             return new Promise(function (resolve, reject) {