improve update notice: timeout, config

The updater in the dashboard needed a timeout to not kill the backend if github is not reachable
Also, this makes the check configurable

include/admin/overview.inc.php

@@ -23,6 +23,12 @@ switch($serendipity['POST']['adminAction']) {
             $data['error_publish'] = $success;
         }
         break;
+    case 'updateCheckDisable':
+        if ( !serendipity_checkFormToken() || !serendipity_checkPermission('blogConfiguration') ) {
+            break;
+        }
+        serendipity_set_config_var('updateCheck', false);
+        break;
 }
     
 
@@ -40,6 +46,7 @@ $data['backend_frontpage_display'] = $output['more'];
 
 $data['curVersion'] = serendipity_getCurrentVersion();
 $data['usedVersion'] = $serendipity['version'];
+$data['updateCheck'] = $serendipity['updateCheck'];
 $data['update'] = version_compare($data['usedVersion'], $data['curVersion'], '<');
 
 

include/functions_installer.inc.php

@@ -1196,21 +1196,44 @@ function serendipity_verifyFTPChecksums() {
     return $badsums;
 }
 
+
+/**
+ * Check https://raw.github.com/s9y/Serendipity/master/docs/RELEASE for the newest available version
+ *
+ * If the file is not fetch- or parseable (behind a proxy, malformed by Garvin), this will return -1
+ * */
 function serendipity_getCurrentVersion() {
-    $updateURL = 'https://raw.github.com/s9y/Serendipity/master/docs/RELEASE';
-
-    $file = fopen($updateURL, 'r');
-    if (!$file) {
-        return;
+    global $serendipity;
+    if ($serendipity['updateCheck'] != "stable" && $serendipity['updateCheck'] != "beta") {
+        return -1;
     }
+    $updateURL = 'https://raw.github.com/s9y/Serendipity/master/docs/RELEASE';
+    $context = stream_context_create( array('http'=>array('timeout' => 5.0)) );
 
-    while (!feof($file)) {
-        $line = fgets($file);
+    $file = @file_get_contents($updateURL, false, $context);
 
-        if (preg_match('/stable:(.+$)/', $line, $match)) {
-            return $match[1];
+    if ( ! $file) {
+        if (function_exists('curl_init')) {
+            $ch = curl_init($updateURL);
+            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+            curl_setopt($ch, CURLOPT_TIMEOUT, "5");
+            $file = curl_exec($ch);
+            curl_close($ch);
         }
     }
+
+    if ($file) {
+        if ($serendipity['updateCheck'] == "stable") {
+            if (preg_match('/^stable:(.+)\b/', $file, $match)) {
+                return $match[1];
+            }
+        } else {
+            if (preg_match('/^beta:(.+)\b/', $file, $match)) {
+                return $match[1];
+            }
+        }
+    }
+    return -1;
 }
 
 /* vim: set sts=4 ts=4 sw=4 expandtab : */

include/tpl/config_local.inc.php

@@ -398,6 +398,12 @@
                                           'type'        => 'bool',
                                           'default'     => false,
                                           'permission'  => 'blogConfiguration'),
+                                    array('var'         => 'updateCheck',
+                                          'title'       => UPDATE_NOTIFICATION,  
+                                          'description' => "Show the update notification in the Dashboard, and for which channel?",  # i18n
+                                          'type'        => 'list',
+                                          'default'     => array('stable' => 'stable', 'beta' => 'beta', 'false' => NO ), # i18n
+                                          'permission'  => 'blogConfiguration'),
                             ));
 
     $res['display'] =

templates/2k11/admin/overview.inc.tpl

@@ -11,12 +11,25 @@
         <span class="msg_error"><span class="icon-attention-circled"></span> {$CONST.PUBLISH_ERROR}: {$error_publish}</span>
     {/if}
 
-    {if $update}
-        <section id="dashboard_update">
-            <h3>{$CONST.UPDATE_NOTIFICATION}</h3>
+    {if $updateCheck == "stable" || $updateCheck == "beta" }
+        {if $curVersion == -1}
+            <section id="dashboard_update">
+                <h3>{$CONST.UPDATE_NOTIFICATION}</h3>
 
-            <span class="msg_notice"><span class="icon-info-circled"></span> {$CONST.NEW_VERSION_AVAILABLE} {$curVersion}</span>
-        </section>
+                <span class="msg_notice"><span class="icon-info-circled"></span> Check for new Serendipity version failed</span> {* i18n *}
+                <form id="updateCheckDisable" method="POST">
+                    <input type="hidden" name="serendipity[adminAction]" value="updateCheckDisable" />
+                    {$token}
+                    <button type="submit">Disable update check</button> {* i18n *}
+                </form>
+            </section>
+        {else if $update}
+            <section id="dashboard_update">
+                <h3>{$CONST.UPDATE_NOTIFICATION}</h3>
+
+                <span class="msg_notice"><span class="icon-info-circled"></span> {$CONST.NEW_VERSION_AVAILABLE} {$curVersion}</span>
+            </section>
+        {/if}
     {/if}
         <section id="dashboard_comments" class="odd equal_heights quick_list">
             <h3>{if 'adminComments'|checkPermission}<a href="serendipity_admin.php?serendipity[adminModule]=comments">{/if}{$CONST.COMMENTS}{if 'adminComments'|checkPermission}</a>{/if}</h3>