暂存

vendor/illuminate/http/Resources/JsonApi/RelationResolver.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Illuminate\Http\Resources\JsonApi;
+
+use Closure;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @internal
+ */
+class RelationResolver
+{
+    /**
+     * The relation resolver.
+     *
+     * @var \Closure(mixed):(\Illuminate\Database\Eloquent\Collection|\Illuminate\Database\Eloquent\Model|null)
+     */
+    public Closure $relationResolver;
+
+    /**
+     * The relation resource class.
+     *
+     * @var class-string<\Illuminate\Http\Resources\JsonApi\JsonApiResource>|null
+     */
+    public ?string $relationResourceClass = null;
+
+    /**
+     * Construct a new resource relationship resolver.
+     *
+     * @param  \Closure(mixed):(\Illuminate\Database\Eloquent\Collection|\Illuminate\Database\Eloquent\Model|null)|class-string<\Illuminate\Http\Resources\JsonApi\JsonApiResource>|null  $resolver
+     */
+    public function __construct(public string $relationName, Closure|string|null $resolver = null)
+    {
+        $this->relationResolver = match (true) {
+            $resolver instanceof Closure => $resolver,
+            default => fn ($resource) => $resource->getRelation($this->relationName),
+        };
+
+        if (is_string($resolver) && class_exists($resolver)) {
+            $this->relationResourceClass = $resolver;
+        }
+    }
+
+    /**
+     * Resolve the relation for a resource.
+     */
+    public function handle(mixed $resource): Collection|Model|null
+    {
+        return value($this->relationResolver, $resource);
+    }
+
+    /**
+     * Get the resource class.
+     *
+     * @return class-string<\Illuminate\Http\Resources\JsonApi\JsonApiResource>|null
+     */
+    public function resourceClass(): ?string
+    {
+        return $this->relationResourceClass;
+    }
+}