feat: priority tags (closes #112)

Author: tobimori

classes/Meta.php

@@ -121,6 +121,7 @@ protected function metaArray(): array
 	public const TAG_TYPE_MAP = [
 		[
 			'tag' => 'title',
+			'priority' => true,
 			'tags' => [
 				'title'
 			]
@@ -221,6 +222,7 @@ public function snippetData(?array $raw = null): array
 					'tag' => $tag['tag'],
 					'attributes' => $value,
 					'content' => null,
+					'priority' => $tag['priority'] ?? false,
 				];
 				continue;
 			}
@@ -234,6 +236,7 @@ public function snippetData(?array $raw = null): array
 					$tag['attributes']['content'] => $value,
 				] : null,
 				'content' => !isset($tag['attributes']) ? $value : null,
+				'priority' => $tag['priority'] ?? false,
 			];
 		}
 

classes/Sitemap/Sitemap.php

@@ -71,7 +71,11 @@ public function toString(): string
 
 		$root = $doc->createElementNS('http://www.sitemaps.org/schemas/sitemap/0.9', 'urlset');
 		$root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:xhtml', 'http://www.w3.org/1999/xhtml');
-		$root->setAttribute('seo-version', App::plugin('tobimori/seo')->version());
+
+		// version can be null when installing branches during development
+		if ($version = App::plugin('tobimori/seo')->version()) {
+			$root->setAttribute('seo-version', $version);
+		}
 
 		foreach ($this as $url) {
 			$root->appendChild($url->toDOMNode($doc));

snippets/head.php

@@ -8,6 +8,20 @@
 
 $tags = $page->metadata()->snippetData();
 
+// if we're using slots, the user wants to output priority tags such as <title>
+// before their stylesheet, script, etc. tags
+if (isset($slot)) {
+	foreach (array_filter($tags, fn($tag) => $tag['priority']) as $tag) {
+		echo Html::tag($tag['tag'], $tag['content'] ?? null, $tag['attributes'] ?? []) . PHP_EOL;
+	}
+
+	echo $slot;
+
+	$tags = array_filter($tags, fn($tag) => !$tag['priority']);
+}
+
+// then output other tags as normal
+// this is unfiltered if slots is not set.
 foreach ($tags as $tag) {
 	echo Html::tag($tag['tag'], $tag['content'] ?? null, $tag['attributes'] ?? []) . PHP_EOL;
 }