From 2d64e9e8132f2973fb5f5859beabb4435a234ac9 Mon Sep 17 00:00:00 2001
From: Chris Jaekl <chris@localhost>
Date: Thu, 30 Dec 2021 16:09:35 -0500
Subject: [PATCH] Add the unfetch polyfill, so that we can function on ancient
 iPads.

---
 README                  | 15 +++++++++++++++
 app/index.html          |  1 +
 app/modernizr-custom.js |  6 +++---
 app/unfetch.js          |  1 +
 js/Main.js              |  6 +++---
 5 files changed, 23 insertions(+), 6 deletions(-)
 create mode 100644 app/unfetch.js

diff --git a/README b/README
index 24d88bc..779f2af 100644
--- a/README
+++ b/README
@@ -7,3 +7,18 @@ General Public Licence version 3 (or, at your option, any later version).
 
 Chris Jaekl
 cejaekl@yahoo.com
+
+------------8<------------8<------------8<------------8<------------8<----------
+This software includes:
+
+UNFETCH
+
+The MIT License (MIT)
+
+Copyright (c) 2017 Jason Miller
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/app/index.html b/app/index.html
index 00d155e..faa558c 100644
--- a/app/index.html
+++ b/app/index.html
@@ -41,6 +41,7 @@
     </div>
 
     <script src="modernizr-custom.js"></script>
+    <script src="unfetch.js"></script>
     <script src="lib.min.js"></script>
   </body>
 </html>
diff --git a/app/modernizr-custom.js b/app/modernizr-custom.js
index 9fdeb1c..91f9180 100644
--- a/app/modernizr-custom.js
+++ b/app/modernizr-custom.js
@@ -1,3 +1,3 @@
-/*! modernizr 3.5.0 (Custom Build) | MIT *
- * https://modernizr.com/download/?-fetch-setclasses !*/
-!function(n,e,s){ function o(n,e){ return typeof n===e; } function a(){ var n,e,s,a,t,l,r; for(var c in f) if(f.hasOwnProperty(c)) { if(n=[],e=f[c],e.name && (n.push(e.name.toLowerCase()),e.options && e.options.aliases && e.options.aliases.length)) for(s=0;s<e.options.aliases.length;s++) n.push(e.options.aliases[s].toLowerCase()); for(a=o(e.fn,'function')?e.fn():e.fn,t=0;t<n.length;t++) l=n[t],r=l.split('.'),1===r.length?Modernizr[r[0]]=a:(!Modernizr[r[0]]||Modernizr[r[0]]instanceof Boolean||(Modernizr[r[0]]=new Boolean(Modernizr[r[0]])),Modernizr[r[0]][r[1]]=a),i.push((a?'':'no-')+r.join('-'));}} function t(n){var e=r.className,s=Modernizr._config.classPrefix||'';if(c&&(e=e.baseVal),Modernizr._config.enableJSClass){var o=new RegExp('(^|\\s)'+s+'no-js(\\s|$)');e=e.replace(o,'$1'+s+'js$2');}Modernizr._config.enableClasses&&(e+=' '+s+n.join(' '+s),c?r.className.baseVal=e:r.className=e);}var i=[],f=[],l={_version:'3.5.0',_config:{classPrefix:'',enableClasses:!0,enableJSClass:!0,usePrefixes:!0},_q:[],on:function(n,e){var s=this;setTimeout(function(){e(s[n]);},0);},addTest:function(n,e,s){f.push({name:n,fn:e,options:s});},addAsyncTest:function(n){f.push({name:null,fn:n});}},Modernizr=function(){};Modernizr.prototype=l,Modernizr=new Modernizr;var r=e.documentElement,c='svg'===r.nodeName.toLowerCase();Modernizr.addTest('fetch','fetch'in n),a(),t(i),delete l.addTest,delete l.addAsyncTest;for(var u=0;u<Modernizr._q.length;u++)Modernizr._q[u]();n.Modernizr=Modernizr;}(window,document);
+/*! modernizr 3.6.0 (Custom Build) | MIT *
+ * https://modernizr.com/download/?-fetch-promises-setclasses !*/
+!function(e,n,s){function o(e){var n=l.className,s=Modernizr._config.classPrefix||"";if(c&&(n=n.baseVal),Modernizr._config.enableJSClass){var o=new RegExp("(^|\\s)"+s+"no-js(\\s|$)");n=n.replace(o,"$1"+s+"js$2")}Modernizr._config.enableClasses&&(n+=" "+s+e.join(" "+s),c?l.className.baseVal=n:l.className=n)}function i(e,n){return typeof e===n}function a(){var e,n,s,o,a,f,l;for(var c in r)if(r.hasOwnProperty(c)){if(e=[],n=r[c],n.name&&(e.push(n.name.toLowerCase()),n.options&&n.options.aliases&&n.options.aliases.length))for(s=0;s<n.options.aliases.length;s++)e.push(n.options.aliases[s].toLowerCase());for(o=i(n.fn,"function")?n.fn():n.fn,a=0;a<e.length;a++)f=e[a],l=f.split("."),1===l.length?Modernizr[l[0]]=o:(!Modernizr[l[0]]||Modernizr[l[0]]instanceof Boolean||(Modernizr[l[0]]=new Boolean(Modernizr[l[0]])),Modernizr[l[0]][l[1]]=o),t.push((o?"":"no-")+l.join("-"))}}var t=[],r=[],f={_version:"3.6.0",_config:{classPrefix:"",enableClasses:!0,enableJSClass:!0,usePrefixes:!0},_q:[],on:function(e,n){var s=this;setTimeout(function(){n(s[e])},0)},addTest:function(e,n,s){r.push({name:e,fn:n,options:s})},addAsyncTest:function(e){r.push({name:null,fn:e})}},Modernizr=function(){};Modernizr.prototype=f,Modernizr=new Modernizr,Modernizr.addTest("promises",function(){return"Promise"in e&&"resolve"in e.Promise&&"reject"in e.Promise&&"all"in e.Promise&&"race"in e.Promise&&function(){var n;return new e.Promise(function(e){n=e}),"function"==typeof n}()}),Modernizr.addTest("fetch","fetch"in e);var l=n.documentElement,c="svg"===l.nodeName.toLowerCase();a(),o(t),delete f.addTest,delete f.addAsyncTest;for(var u=0;u<Modernizr._q.length;u++)Modernizr._q[u]();e.Modernizr=Modernizr}(window,document);
diff --git a/app/unfetch.js b/app/unfetch.js
new file mode 100644
index 0000000..728eb4b
--- /dev/null
+++ b/app/unfetch.js
@@ -0,0 +1 @@
+self.fetch||(self.fetch=function(e,n){return n=n||{},new Promise(function(t,s){var r=new XMLHttpRequest,o=[],u=[],i={},a=function(){return{ok:2==(r.status/100|0),statusText:r.statusText,status:r.status,url:r.responseURL,text:function(){return Promise.resolve(r.responseText)},json:function(){return Promise.resolve(r.responseText).then(JSON.parse)},blob:function(){return Promise.resolve(new Blob([r.response]))},clone:a,headers:{keys:function(){return o},entries:function(){return u},get:function(e){return i[e.toLowerCase()]},has:function(e){return e.toLowerCase()in i}}}};for(var c in r.open(n.method||"get",e,!0),r.onload=function(){r.getAllResponseHeaders().replace(/^(.*?):[^\S\n]*([\s\S]*?)$/gm,function(e,n,t){o.push(n=n.toLowerCase()),u.push([n,t]),i[n]=i[n]?i[n]+","+t:t}),t(a())},r.onerror=s,r.withCredentials="include"==n.credentials,n.headers)r.setRequestHeader(c,n.headers[c]);r.send(n.body||null)})});
diff --git a/js/Main.js b/js/Main.js
index 22e7dd6..46c77b0 100644
--- a/js/Main.js
+++ b/js/Main.js
@@ -20,14 +20,14 @@ BooksView.init(BooksModel);
 PagingController.init(BooksModel);
 SearchController.init(BooksModel);
 
-if (Modernizr.fetch) {
+if (Modernizr.promises) {
     console.log('quanweb:  browser feature check:  OK');
 }
 else {
     // If we cared about supporting older browsers (at this point, IE11 and Adroid 4.x's built-in browser,
     // neither of which is due to receive security patch support for much longer), then we would insert a 
-    // shim here to implement the fetch API.  But, in this case, we don't and won't.
-    alert('Sorry, this page will not work in your browser.\nPlease use a recent version of Chrome, Edge or Firefox instead.');
+    // shim here to implement promises.  But, in this case, we don't and won't.
+    alert('Sorry, this page will not work in your browser.\nPlease use a recent version of Chrome, Edge, Firefox or Safari instead.');
 }
 
 // ================
-- 
2.39.2