From adab47e51d27f5e45f0bc1ad00ed340423bcbebb Mon Sep 17 00:00:00 2001
From: Jakob Stendahl <jakobste@uio.no>
Date: Mon, 11 Jan 2021 21:40:16 +0100
Subject: :sparkles: Add manifest

---
 icon.png      | Bin 0 -> 21396 bytes
 index.html    |   2 ++
 manifest.json |  16 +++++++++++++++
 script.js     |   5 ++++-
 sw.js         |  61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100644 icon.png
 create mode 100644 manifest.json
 create mode 100644 sw.js

diff --git a/icon.png b/icon.png
new file mode 100644
index 0000000..be75d96
Binary files /dev/null and b/icon.png differ
diff --git a/index.html b/index.html
index a704871..83ee48c 100644
--- a/index.html
+++ b/index.html
@@ -4,7 +4,9 @@
         <meta charset="utf-8">
         <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
         <title>HOVER:BIT Controller</title>
+        <link rel="canonical" rel="https://jakobst1n.github.io/hoverbit-ble/">
         <link rel="stylesheet" type="text/css" href="styles.css">
+        <link rel="manifest" href="manifest.json" crossorigin="use-credentials">
         <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
 
         <script type="text/javascript" src="microbit.umd.js"></script>
diff --git a/manifest.json b/manifest.json
new file mode 100644
index 0000000..573118f
--- /dev/null
+++ b/manifest.json
@@ -0,0 +1,16 @@
+{
+	"background_color": "#464a47",
+	"theme_color": "#5ac775",
+	"name": "HOVERBIT Controller",
+	"short_name": "HOVERBIT BLE",
+	"display": "fullscreen",
+	"start_url": "/microbit-ble/",
+    "orientation": "landscape",
+    "icons": [
+		{
+			"src": "icon.png",
+			"sizes": "512x512",
+			"type": "image/png"
+		}
+	]
+}
diff --git a/script.js b/script.js
index dc61b25..4376d15 100644
--- a/script.js
+++ b/script.js
@@ -1,5 +1,8 @@
-let StickyControls = false;
+if (navigator.serviceWorker) {
+    navigator.serviceWorker.register('/hoverbit-ble/sw.js', {scope: '/hoverbit-ble/'})
+}
 
+let StickyControls = false;
 let throttleElement = document.querySelector(".throttle");
 let rudderElement = document.querySelector(".rudder");
 
diff --git a/sw.js b/sw.js
new file mode 100644
index 0000000..bc3f42d
--- /dev/null
+++ b/sw.js
@@ -0,0 +1,61 @@
+var APP_PREFIX = 'hoverbitcontroller'     // Identifier for this app (this needs to be consistent across every cache update)
+var VERSION = 'version_01'              // Version of the off-line cache (change this value everytime you want to update cache)
+var CACHE_NAME = APP_PREFIX + VERSION
+var URLS = [                            // Add URL you want to cache in this list.
+  '/hoverbit-ble/',                     // If you have separate JS/CSS files,
+  '/hoverbit-ble/index.html',            // add path to those files here
+  '/hoverbit-ble/styles.css',
+  '/hoverbit-ble/microbit.umd.js',
+  '/hoverbit-ble/script.js'
+]
+
+// Respond with cached resources
+self.addEventListener('fetch', function (e) {
+  console.log('fetch request : ' + e.request.url)
+  e.respondWith(
+    caches.match(e.request).then(function (request) {
+      if (request) { // if cache is available, respond with cache
+        console.log('responding with cache : ' + e.request.url)
+        return request
+      } else {       // if there are no cache, try fetching request
+        console.log('file is not cached, fetching : ' + e.request.url)
+        return fetch(e.request)
+      }
+
+      // You can omit if/else for console.log & put one line below like this too.
+      // return request || fetch(e.request)
+    })
+  )
+})
+
+// Cache resources
+self.addEventListener('install', function (e) {
+  e.waitUntil(
+    caches.open(CACHE_NAME).then(function (cache) {
+      console.log('installing cache : ' + CACHE_NAME)
+      return cache.addAll(URLS)
+    })
+  )
+})
+
+// Delete outdated caches
+self.addEventListener('activate', function (e) {
+  e.waitUntil(
+    caches.keys().then(function (keyList) {
+      // `keyList` contains all cache names under your username.github.io
+      // filter out ones that has this app prefix to create white list
+      var cacheWhitelist = keyList.filter(function (key) {
+        return key.indexOf(APP_PREFIX)
+      })
+      // add current cache name to white list
+      cacheWhitelist.push(CACHE_NAME)
+
+      return Promise.all(keyList.map(function (key, i) {
+        if (cacheWhitelist.indexOf(key) === -1) {
+          console.log('deleting cache : ' + keyList[i] )
+          return caches.delete(keyList[i])
+        }
+      }))
+    })
+  )
+})
-- 
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