feat(meta): add ogUrl url property (#42)

Author: TheAlexLichter

Diff for: docs/modules/meta.md

@@ -93,6 +93,10 @@ These types are accepted:
   * `width`, `height`: specify the dimensions, respectively.
   * `type`: specify the MIME type.
 
+**ogUrl**
+- Default: ogHost (if defined)
+- Meta: `og:url`
+
 **nativeUI**
 - Default: `false`
 

Diff for: packages/meta/index.js

@@ -33,7 +33,9 @@ function generateMeta (_options) {
     ogType: 'website',
     ogTitle: true,
     ogDescription: true,
-    ogImage: true
+    ogImage: true,
+    ogHost: undefined,
+    ogUrl: true
   }
 
   // Combine sources
@@ -148,6 +150,14 @@ function generateMeta (_options) {
     this.options.head.meta.push({ hid: 'og:description', name: 'og:description', property: 'og:description', content: options.ogDescription })
   }
 
+  // og:url
+  if (options.ogHost && options.ogUrl === true) {
+    options.ogUrl = options.ogHost
+  }
+  if (options.ogUrl && !find(this.options.head.meta, 'property', 'og:url') && !find(this.options.head.meta, 'name', 'og:url')) {
+    this.options.head.meta.push({hid: 'og:url', name: 'og:url', property: 'og:url', content: options.ogUrl})
+  }
+
   // og:image
   if (options.ogImage === true) {
     if (options.icons && options.icons.length > 0) {