From 2cbb516059066dd671b43371630518022bdf6be6 Mon Sep 17 00:00:00 2001
From: Roman Hotsiy <gotsijroman@gmail.com>
Date: Wed, 23 Mar 2016 23:16:30 +0200
Subject: [PATCH] url parameter for demo page (fixes #22)

---
 demo/main.js | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/demo/main.js b/demo/main.js
index 836eaa45..2762004b 100644
--- a/demo/main.js
+++ b/demo/main.js
@@ -5,9 +5,31 @@
   var schemaUrlInput = document.getElementById('schema-url-input');
   schemaUrlForm.addEventListener('submit', function(event) {
     event.preventDefault();
-    Redoc.init(schemaUrlInput.value);
+    event.stopPropagation();
+    location.search = updateQueryStringParameter(location.search, 'url', schemaUrlInput.value)
     return false;
   })
 
+  var url = window.location.search.match(/url=([^&]+)/);
+  if (url && url.length > 1) {
+    url = decodeURIComponent(url[1]);
+    document.getElementsByTagName('redoc')[0].setAttribute('spec-url', url);
+    schemaUrlInput.value = url;
+  }
+
+  function updateQueryStringParameter(uri, key, value) {
+    var re = new RegExp("([?|&])" + key + "=.*?(&|#|$)", "i");
+    if (uri.match(re)) {
+      return uri.replace(re, '$1' + key + "=" + value + '$2');
+    } else {
+      var hash =  '';
+      if( uri.indexOf('#') !== -1 ){
+          hash = uri.replace(/.*#/, '#');
+          uri = uri.replace(/#.*/, '');
+      }
+      var separator = uri.indexOf('?') !== -1 ? "&" : "?";
+      return uri + separator + key + "=" + value + hash;
+    }
+  }
   //window.redocDebugMode = true;
 })();