add seo plugin

vendor/spatie/schema-org/generator/Definitions.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Spatie\SchemaOrg\Generator;
+
+use Illuminate\Support\Collection;
+use OutOfBoundsException;
+use Spatie\SchemaOrg\Generator\Parser\JsonLdParser;
+
+class Definitions
+{
+    protected array $sources;
+
+    protected string $tempDir = __DIR__.'/temp';
+
+    public function __construct(array $sources)
+    {
+        $this->sources = $sources;
+    }
+
+    public function preload(): void
+    {
+        foreach ($this->sources as $sourceId => $sourcePath) {
+            $this->loadSource($sourceId, false);
+        }
+    }
+
+    public function query(string $selector): Collection
+    {
+        return (new JsonLdParser($this->loadSource('core')))->filter($selector);
+    }
+
+    protected function loadSource(string $sourceId, bool $fromCache = true): string
+    {
+        if (! isset($this->sources[$sourceId])) {
+            throw new OutOfBoundsException("Source `{$sourceId}` doesn't exist");
+        }
+
+        $cachePath = $this->tempDir.'/'.$sourceId.'.jsonld';
+
+        if ($fromCache && file_exists($cachePath)) {
+            return file_get_contents($cachePath);
+        }
+
+        $jsonLd = file_get_contents($this->sources[$sourceId]);
+
+        file_put_contents($cachePath, $jsonLd);
+
+        return $jsonLd;
+    }
+}