Show random note button only when graph data is availible

Fixes #168

Author: secure-77

Changelog.md

@@ -5,6 +5,8 @@
 - implemented issue (additional highlight.js support) [#173](https://github.com/secure-77/Perlite/issues/173)
 - sustainable mb_strlen / strlen / utf8_decode fix
 - removed border from local graph and custom page section
+- added headline copy link button [#156](https://github.com/secure-77/Perlite/issues/156)
+- show random button only when graph-data is availible [#168](https://github.com/secure-77/Perlite/issues/168)
 
 
 ## 1.6

perlite/.js/perlite.js

@@ -565,6 +565,7 @@ function renderGraph(modal, path = "", filter_emptyNodes = false, show_tags = tr
   // no graph found exit
   if ($("#allGraphNodes").length == 0 || $("#allGraphNodes").text == '[]') {
     console.log("Graph: no data found")
+    document.getElementById("random_note").style.display = "none";
     return;
   }
 

perlite/index.php

@@ -125,7 +125,7 @@ class="logo-full">
                                 <path d="M12 12v3"></path>
                             </svg></div>
                     </div>
-                    <div class="side-dock-actions">
+                    <div id="random_note" class="side-dock-actions">
                         <div class="clickable-icon side-dock-ribbon-action" aria-label="Open random note"
                             data-tooltip-position="right" data-tooltip-delay="300">
                             <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"