Added gtag library

src/Tag/Gtag.php

@@ -13,6 +13,7 @@ public function __construct(string $template, array $parameters = [])
     {
         parent::__construct($template);
 
+        $this->setName('setono_tag_bag_gtag');
         $this->parameters = $parameters;
     }
 

src/Tag/GtagConfig.php

@@ -13,6 +13,7 @@ public function __construct(string $target, array $parameters = [])
     {
         parent::__construct('@SetonoTagBagGtag/config', $parameters);
 
+        $this->setName('setono_tag_bag_gtag_config');
         $this->target = $target;
     }
 

src/Tag/GtagEvent.php

@@ -13,6 +13,7 @@ public function __construct(string $event, array $parameters = [])
     {
         parent::__construct('@SetonoTagBagGtag/event', $parameters);
 
+        $this->setName('setono_tag_bag_gtag_event');
         $this->event = $event;
     }
 

src/Tag/GtagLibrary.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\TagBag\Tag;
+
+class GtagLibrary extends PhpTemplatesTag
+{
+    public const NAME = 'setono_tag_bag_gtag_library';
+
+    public function __construct(string $id)
+    {
+        parent::__construct('@SetonoTagBagGtag/library', [
+            'id' => $id,
+        ]);
+
+        $this->setName(self::NAME);
+        $this->setUnique(true);
+    }
+}

src/Tag/GtagSet.php

@@ -9,5 +9,7 @@ class GtagSet extends Gtag implements GtagSetInterface
     public function __construct(array $parameters)
     {
         parent::__construct('@SetonoTagBagGtag/set', $parameters);
+
+        $this->setName('setono_tag_bag_gtag_set');
     }
 }

src/templates/SetonoTagBagGtag/library.php

@@ -0,0 +1,6 @@
+<script async src="https://www.googletagmanager.com/gtag/js?id=<?=$id?>"></script>
+<script>
+window.dataLayer = window.dataLayer || [];
+function gtag(){dataLayer.push(arguments);}
+gtag('js', new Date());
+</script>

tests/Tag/GtagLibraryTest.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\TagBag\Tag;
+
+use PHPUnit\Framework\TestCase;
+use Setono\PhpTemplates\Engine\Engine;
+use Setono\TagBag\Renderer\PhpTemplatesRenderer;
+
+/**
+ * @covers \Setono\TagBag\Tag\GtagLibrary
+ */
+final class GtagLibraryTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function it_creates(): void
+    {
+        $tag = new GtagLibrary('id');
+        $this->assertInstanceOf(TagInterface::class, $tag);
+        $this->assertInstanceOf(PhpTemplatesTagInterface::class, $tag);
+    }
+
+    /**
+     * @test
+     */
+    public function it_has_default_values(): void
+    {
+        $tag = new GtagLibrary('id');
+
+        $this->assertSame('@SetonoTagBagGtag/library', $tag->getTemplate());
+    }
+
+    /**
+     * @test
+     */
+    public function it_renders_with_parameters(): void
+    {
+        $tag = new GtagLibrary('id');
+
+        $renderer = new PhpTemplatesRenderer(new Engine([__DIR__ . '/../../src/templates']));
+
+        $expected = <<<SCRIPT
+<script async src="https://www.googletagmanager.com/gtag/js?id=id"></script>
+<script>
+window.dataLayer = window.dataLayer || [];
+function gtag(){dataLayer.push(arguments);}
+gtag('js', new Date());
+</script>
+
+SCRIPT;
+
+        $this->assertTrue($renderer->supports($tag));
+        $this->assertSame($expected, $renderer->render($tag));
+    }
+}