From 7b9f9a7812089b373394cc02275699fc28ef39b3 Mon Sep 17 00:00:00 2001
From: Franz Liedke <franz@develophp.org>
Date: Mon, 13 Mar 2017 18:08:32 +0100
Subject: [PATCH] Add link() and setCanonicalUrl() methods to the WebAppView
These make it easier for controllers to define relationships from
the current to other pages, which is important for SEO mostly.
---
framework/core/src/Http/WebApp/WebAppView.php | 45 ++++++++++++++++++-
1 file changed, 44 insertions(+), 1 deletion(-)
diff --git a/framework/core/src/Http/WebApp/WebAppView.php b/framework/core/src/Http/WebApp/WebAppView.php
index 5035e41ca..070c75131 100644
--- a/framework/core/src/Http/WebApp/WebAppView.php
+++ b/framework/core/src/Http/WebApp/WebAppView.php
@@ -107,6 +107,13 @@ class WebAppView
*/
protected $foot = [];
+ /**
+ * A map of <link> tags to be generated.
+ *
+ * @var array
+ */
+ protected $links = [];
+
/**
* @var CompilerInterface
*/
@@ -219,6 +226,31 @@ class WebAppView
$this->foot[] = $string;
}
+ /**
+ * Configure a <link> tag.
+ *
+ * @param string $relation
+ * @param string $target
+ */
+ public function link($relation, $target)
+ {
+ $this->links[$relation] = $target;
+ }
+
+ /**
+ * Configure the canonical URL for this page.
+ *
+ * This will signal to search engines what URL should be used for this
+ * content, if it can be found under multiple addresses. This is an
+ * important tool to tackle duplicate content.
+ *
+ * @param string $url
+ */
+ public function setCanonicalUrl($url)
+ {
+ $this->link('canonical', $url);
+ }
+
/**
* Set a variable to be preloaded into the app.
*
@@ -271,7 +303,7 @@ class WebAppView
$view->cssUrls = $this->buildCssUrls($baseUrl);
$view->jsUrls = $this->buildJsUrls($baseUrl);
- $view->head = implode("\n", $this->head);
+ $view->head = $this->buildHeadContent();
$view->foot = implode("\n", $this->foot);
return $view->render();
@@ -337,6 +369,17 @@ class WebAppView
}, array_filter($files));
}
+ protected function buildHeadContent()
+ {
+ $html = implode("\n", $this->head);
+
+ foreach ($this->links as $rel => $href) {
+ $html .= "\n<link rel=\"$rel\" href=\"$href\" />";
+ }
+
+ return $html;
+ }
+
/**
* @return CompilerInterface
*/