feat: introduce global template props

Author: wilr

src/Traits/GlobalTemplateProvider.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Akqa\SilverStripe\Traits;
+
+use SilverStripe\Control\Director;
+use SilverStripe\View\TemplateGlobalProvider;
+
+class GlobalTemplateProvider implements TemplateGlobalProvider
+{
+    public static function get_template_global_variables()
+    {
+        return [
+            'IsLive' => 'is_live',
+            'IsTest' => 'is_test',
+            'IsDev' => 'is_dev',
+        ];
+    }
+
+    public static function is_live(): bool
+    {
+        return Director::isLive();
+    }
+
+    public static function is_dev(): bool
+    {
+        return Director::isDev();
+    }
+
+    public static function is_test(): bool
+    {
+        return Director::isTest();
+    }
+}

tests/Traits/GlobalTemplateProviderTest.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Akqa\SilverStripe\Tests\Traits;
+
+use Akqa\SilverStripe\Traits\GlobalTemplateProvider;
+use SilverStripe\Control\Director;
+use SilverStripe\Dev\SapphireTest;
+use SilverStripe\View\TemplateGlobalProvider;
+
+class GlobalTemplateProviderTest extends SapphireTest
+{
+    public function testImplementsTemplateGlobalProvider(): void
+    {
+        $this->assertInstanceOf(TemplateGlobalProvider::class, new GlobalTemplateProvider());
+    }
+
+    public function testGetTemplateGlobalVariablesReturnsExpectedKeys(): void
+    {
+        $vars = GlobalTemplateProvider::get_template_global_variables();
+
+        $this->assertIsArray($vars);
+        $this->assertArrayHasKey('IsLive', $vars);
+        $this->assertArrayHasKey('IsTest', $vars);
+        $this->assertArrayHasKey('IsDev', $vars);
+        $this->assertSame('is_live', $vars['IsLive']);
+        $this->assertSame('is_test', $vars['IsTest']);
+        $this->assertSame('is_dev', $vars['IsDev']);
+    }
+
+    public function testIsTestDelegatesToDirector(): void
+    {
+        $this->assertSame(Director::isTest(), GlobalTemplateProvider::is_test());
+    }
+
+    public function testIsLiveDelegatesToDirector(): void
+    {
+        $this->assertSame(Director::isLive(), GlobalTemplateProvider::is_live());
+    }
+
+    public function testIsDevDelegatesToDirector(): void
+    {
+        $this->assertSame(Director::isDev(), GlobalTemplateProvider::is_dev());
+    }
+}