Merge pull request #641 from LearningLocker/issue/version-checking

Fixes #635.

Author: ryasmi

app/views/layouts/sidebars/sidebar_footer.blade.php

@@ -3,12 +3,24 @@
   <div id="footer">
     Powered by
     <a href="http://learninglocker.net" target='_blank'>Learning Locker</a>
-    <?php $installed_version = file_get_contents(base_path().'/VERSION'); ?>
-    <?php $latest_version = file_get_contents('https://raw.githubusercontent.com/LearningLocker/learninglocker/master/VERSION'); ?>
+    <?php
+      $installed_version = file_get_contents(base_path().'/VERSION');
+      try {
+        $latest_version = file_get_contents(
+          'https://raw.githubusercontent.com/LearningLocker/learninglocker/master/VERSION'
+        );
+      } catch (Exception $ex) {
+        $latest_version = null;
+      }
+    ?>
     <a href="https://github.com/LearningLocker/learninglocker/releases/tag/v{{ $installed_version }}">Version {{ $installed_version }}</a>
-    @if ($latest_version !== $installed_version)
-      <a href="https://github.com/LearningLocker/learninglocker/releases/latest">You can upgrade to {{ $latest_version }}</a>
-    @else
-      <a href="https://github.com/LearningLocker/learninglocker/releases/latest">You have the latest version</a>
-    @endif
+    <a href="https://github.com/LearningLocker/learninglocker/releases/latest">
+      @if ($latest_version === null)
+        Github Releases
+      @elseif ($latest_version !== $installed_version)
+        You can upgrade to {{ $latest_version }}
+      @else
+        You have the latest version
+      @endif
+    </a>
   </div>