From 41f4d269b06101c13357a558eaddd033a6770a9f Mon Sep 17 00:00:00 2001
From: Andy Miller <rhuk@mac.com>
Date: Thu, 9 Oct 2014 21:04:30 -0600
Subject: [PATCH] Various tweaks and hopefully improvements to file change
 detection

---
 system/src/Grav/Common/Filesystem/Folder.php | 11 ++---
 system/src/Grav/Common/Page/Page.php         | 45 +++++++++++---------
 system/src/Grav/Common/Page/Pages.php        | 20 +++++----
 3 files changed, 40 insertions(+), 36 deletions(-)

diff --git a/system/src/Grav/Common/Filesystem/Folder.php b/system/src/Grav/Common/Filesystem/Folder.php
index 9107e79fe..c54e019fe 100644
--- a/system/src/Grav/Common/Filesystem/Folder.php
+++ b/system/src/Grav/Common/Filesystem/Folder.php
@@ -60,13 +60,10 @@ abstract class Folder
 
         /** @var \RecursiveDirectoryIterator $file */
         foreach ($itr as $file) {
-            if (!$file->isDir()) {
-                $file_modified = $file->getMTime();
-                if ($file_modified > $last_modified) {
-                    $last_modified = $file_modified;
-                }
+            $file_modified = $file->getMTime();
+            if ($file_modified > $last_modified) {
+                $last_modified = $file_modified;
             }
-
         }
 
         return $last_modified;
@@ -277,7 +274,7 @@ abstract class Folder
 class GravRecursiveFilterIterator extends \RecursiveFilterIterator
 {
     public static $FILTERS = array(
-        '.', '..', '.DS_Store'
+        '..', '.DS_Store'
     );
 
     public function accept()
diff --git a/system/src/Grav/Common/Page/Page.php b/system/src/Grav/Common/Page/Page.php
index 8e41ef04e..c99e51f84 100644
--- a/system/src/Grav/Common/Page/Page.php
+++ b/system/src/Grav/Common/Page/Page.php
@@ -750,33 +750,36 @@ class Page
             $this->metadata = array();
             $page_header = $this->header;
 
-
             // Set the Generator tag
             $this->metadata['generator'] = array('name'=>'generator', 'content'=>'Grav ' . GRAV_VERSION);
 
-            // Merge any site.metadata settings in with page metadata
-            $defaults = (array) self::$grav['config']->get('site.metadata');
-            if (isset($page_header->metadata)) {
-                $page_header->metadata = array_merge($defaults, $page_header->metadata);
-            } else {
-                $page_header->metadata = $defaults;
-            }
+            // Safety check to ensure we have a header
+            if ($page_header) {
+                // Merge any site.metadata settings in with page metadata
+                $defaults = (array) self::$grav['config']->get('site.metadata');
 
-            // Build an array of meta objects..
-            foreach((array)$page_header->metadata as $key => $value) {
-
-                // If this is a property type metadata: "og", "twitter", "facebook" etc
-                if (is_array($value)) {
-                    foreach ($value as $property => $prop_value) {
-                        $prop_key =  $key.":".$property;
-                        $this->metadata[$prop_key] = array('property'=>$prop_key, 'content'=>$prop_value);
-                    }
-                // If it this is a standard meta data type
+                if (isset($page_header->metadata)) {
+                    $page_header->metadata = array_merge($defaults, $page_header->metadata);
                 } else {
-                    if (in_array($key, $header_tag_http_equivs)) {
-                        $this->metadata[$key] = array('http_equiv'=>$key, 'content'=>$value);
+                    $page_header->metadata = $defaults;
+                }
+
+                // Build an array of meta objects..
+                foreach((array)$page_header->metadata as $key => $value) {
+
+                    // If this is a property type metadata: "og", "twitter", "facebook" etc
+                    if (is_array($value)) {
+                        foreach ($value as $property => $prop_value) {
+                            $prop_key =  $key.":".$property;
+                            $this->metadata[$prop_key] = array('property'=>$prop_key, 'content'=>$prop_value);
+                        }
+                    // If it this is a standard meta data type
                     } else {
-                        $this->metadata[$key] = array('name'=>$key, 'content'=>$value);
+                        if (in_array($key, $header_tag_http_equivs)) {
+                            $this->metadata[$key] = array('http_equiv'=>$key, 'content'=>$value);
+                        } else {
+                            $this->metadata[$key] = array('name'=>$key, 'content'=>$value);
+                        }
                     }
                 }
             }
diff --git a/system/src/Grav/Common/Page/Pages.php b/system/src/Grav/Common/Page/Pages.php
index 62a414ee4..4570fde09 100644
--- a/system/src/Grav/Common/Page/Pages.php
+++ b/system/src/Grav/Common/Page/Pages.php
@@ -465,13 +465,18 @@ class Pages
         // set current modified of page
         $last_modified = $page->modified();
 
+        // flat for content availability
+        $content_exists = false;
+
         /** @var \DirectoryIterator $file */
         foreach ($iterator as $file) {
             $name = $file->getFilename();
+            $modified = $file->getMTime();
 
             if ($file->isFile() && Utils::endsWith($name, CONTENT_EXT)) {
 
                 $page->init($file);
+                $content_exists = true;
 
                 if ($config->get('system.pages.events.page')) {
                     $this->grav->fireEvent('onPageProcessed', new Event(['page' => $page]));
@@ -494,24 +499,23 @@ class Pages
 
                 // set the modified time if not already set
                 if (!$page->date()) {
-                    $page->date($file->getMTime());
+                    $page->date($modified);
                 }
 
-                // set the last modified time on pages
-                $this->lastModified($file->getMTime());
-
                 if ($config->get('system.pages.events.page')) {
                     $this->grav->fireEvent('onFolderProcessed', new Event(['page' => $page]));
                 }
             }
 
             // Update the last modified if it's newer than already found
-            $date = $file->getMTime();
-            if ($date > $last_modified) {
-                $last_modified = $date;
+            if ($modified > $last_modified) {
+                $last_modified = $modified;
             }
+        }
 
-
+        // Set routability to false if no page found
+        if (!$content_exists) {
+            $page->routable(false);
         }
 
         // Override the modified and ID so that it takes the latest change into account