From d8ea4508ebab2516aa1591b7b166512593b27a0f Mon Sep 17 00:00:00 2001
From: Alexander Schranz <alexander@sulu.io>
Date: Tue, 1 Nov 2022 16:57:35 +0100
Subject: [PATCH] Add namespace loader

---
 src/Latte/Loaders/NamespaceLoader.php     | 87 +++++++++++++++++++++++
 tests/common/Loaders.NamespaceLoader.phpt | 30 ++++++++
 2 files changed, 117 insertions(+)
 create mode 100644 src/Latte/Loaders/NamespaceLoader.php
 create mode 100644 tests/common/Loaders.NamespaceLoader.phpt

diff --git a/src/Latte/Loaders/NamespaceLoader.php b/src/Latte/Loaders/NamespaceLoader.php
new file mode 100644
index 0000000000..803614b91c
--- /dev/null
+++ b/src/Latte/Loaders/NamespaceLoader.php
@@ -0,0 +1,87 @@
+<?php
+
+/**
+ * This file is part of the Latte (https://latte.nette.org)
+ * Copyright (c) 2008 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace Latte\Loaders;
+
+use Latte;
+
+
+/**
+ * Template loader.
+ */
+class NamespaceLoader implements Latte\Loader
+{
+    /**
+     * @var Latte\Loader[]
+     */
+    private array $loaders;
+
+    public function __construct(array $loaders)
+    {
+        $this->loaders = $loaders;
+    }
+
+    /**
+     * Returns template source code.
+     */
+    public function getContent(string $name): string
+    {
+        [$loader, $name] = $this->extractLoaderAndName($name);
+
+        return $loader->getContent($name);
+    }
+
+
+    public function isExpired(string $file, int $time): bool
+    {
+        [$loader, $name] = $this->extractLoaderAndName($file);
+
+        return $loader->isExpired($name, $time);
+    }
+
+
+    /**
+     * Returns referred template name.
+     */
+    public function getReferredName(string $name, string $referringName): string
+    {
+        [$loader, $name] = $this->extractLoaderAndName($name);
+
+        return $loader->getReferredName($name, $referringName);
+    }
+
+
+    /**
+     * Returns unique identifier for caching.
+     */
+    public function getUniqueId(string $name): string
+    {
+        [$loader, $name] = $this->extractLoaderAndName($name);
+
+        return $loader->getUniqueId($name);
+    }
+
+
+    private function extractLoaderAndName(string $name): array
+    {
+        $namespaceParts = \explode('::', $name, 2);
+
+        if (count($namespaceParts) === 2) {
+            return [
+                $this->loaders[$namespaceParts[0]],
+                $namespaceParts[1],
+            ];
+        }
+
+        return [
+            $this->loaders[''],
+            $name,
+        ];
+    }
+}
diff --git a/tests/common/Loaders.NamespaceLoader.phpt b/tests/common/Loaders.NamespaceLoader.phpt
new file mode 100644
index 0000000000..5327229511
--- /dev/null
+++ b/tests/common/Loaders.NamespaceLoader.phpt
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * Test: StringLoader
+ */
+
+declare(strict_types=1);
+
+use Latte\Loaders\StringLoader;
+use Latte\Loaders\NamespaceLoader;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+test('', function () {
+    $defaultLoader = new StringLoader(['main' => 'defaultcontent']);
+    $appLoader = new StringLoader(['main' => 'appcontent']);
+    $otherLoader = new StringLoader(['main' => 'othercontent']);
+
+    $loader = new NamespaceLoader([
+        '' => $defaultLoader,
+        'app' => $appLoader,
+        'other' => $otherLoader,
+    ]);
+
+    Assert::same('defaultcontent', $loader->getContent('main'));
+    Assert::same('appcontent', $loader->getContent('app::main'));
+    Assert::same('othercontent', $loader->getContent('other::main'));
+});