Added support for external_url: page header

CHANGELOG.md

@@ -4,6 +4,7 @@
 1. [](#improved)
     * Important vendor updates to provide PHP 7.1 beta support!
     * Added a `Util::arrayFlatten()` static function
+    * Added support for 'external_url' page header to enable easier external URL based menu items
 1. [](#bugfix)
     * Fix for lightbox media function throwing error [#981](https://github.com/getgrav/grav/issues/981)
 

system/blueprints/pages/external.yaml

@@ -0,0 +1,36 @@
+rules:
+  slug:
+    pattern: "[a-zа-я][a-zа-я0-9_\-]+"
+    min: 2
+    max: 80
+
+form:
+  validation: loose
+
+  fields:
+
+    tabs:
+      type: tabs
+      active: 1
+
+      fields:
+        content:
+          type: tab
+          title: PLUGIN_ADMIN.CONTENT
+
+          fields:
+
+            header.title:
+              type: text
+              autofocus: true
+              label: PLUGIN_ADMIN.TITLE
+
+            header.external_url:
+                type: text
+                label: PLUGIN_ADMIN.EXTERNAL_URL
+                placeholder: https://getgrav.org
+                validate:
+                    required: true
+        options:
+          type: tab
+          title: PLUGIN_ADMIN.OPTIONS

system/src/Grav/Common/Page/Page.php

@@ -54,6 +54,7 @@ class Page
     protected $routable;
     protected $modified;
     protected $redirect;
+    protected $external_url;
     protected $items;
     protected $header;
     protected $frontmatter;
@@ -364,6 +365,9 @@ class Page
             if (isset($this->header->redirect)) {
                 $this->redirect = trim($this->header->redirect);
             }
+            if (isset($this->header->external_url)) {
+                $this->external_url = trim($this->header->external_url);
+            }
             if (isset($this->header->order_dir)) {
                 $this->order_dir = trim($this->header->order_dir);
             }
@@ -1470,6 +1474,11 @@ class Page
         /** @var Uri $uri */
         $uri = $grav['uri'];
 
+        // Override any URL when external_url is set
+        if (isset($this->external_url)) {
+            return $this->external_url;
+        }
+
         // get pre-route
         if ($include_lang && $language->enabled()) {
             $pre_route = $language->getLanguageURLPrefix();

system/src/Grav/Common/Page/Types.php

@@ -52,6 +52,8 @@ class Types implements \ArrayAccess, \Iterator, \Countable
 
             // Register default by default.
             $this->register('default');
+
+            $this->register('external');
         }
 
         foreach ($this->findBlueprints($uri) as $type => $blueprint) {