Add an EntrypointLookupCollection.

This collection will be used to store all the different builds EntrypointLookup instances.

Author: shulard

src/Asset/EntrypointLookupCollection.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of the Symfony WebpackEncoreBundle package.
+ * (c) Fabien Potencier <[email protected]>
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\WebpackEncoreBundle\Asset;
+
+use Symfony\WebpackEncoreBundle\Exception\UndefinedBuildException;
+use Psr\Container\ContainerInterface;
+
+/**
+ * Aggregate the different entry points configured in the container.
+ *
+ * Retrieve the EntrypointLookup instance from the given key.
+ *
+ * @final
+ */
+class EntrypointLookupCollection
+{
+    private $buildEntrypoints;
+
+    public function __construct(ContainerInterface $buildEntrypoints)
+    {
+        $this->buildEntrypoints = $buildEntrypoints;
+    }
+
+    public function getEntrypointLookup(string $buildName): EntrypointLookupInterface
+    {
+        if (!$this->buildEntrypoints->has($buildName)) {
+            throw new UndefinedBuildException(sprintf('Given entry point "%s" is not configured', $buildName));
+        }
+
+        return $this->buildEntrypoints->get($buildName);
+    }
+}