Initial commit

app/Service/Storage/StorageFileNameParser.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace App\Service\Storage;
+
+use Illuminate\Support\Str;
+
+/**
+ * Used
+ * File can have 2 formats:
+ * - file_name-{uuid}.{ext}
+ * - {uuid}
+ */
+class StorageFileNameParser
+{
+    public ?string $uuid = null;
+    public ?string $fileName = null;
+    public ?string $extension = null;
+
+    public function __construct(string $fileName)
+    {
+        $this->parseFileName($fileName);
+    }
+
+    /**
+     * If we have parsed a file name and an extension, we keep the same and append uuid to avoid collisions
+     * Otherwise we just return the uuid
+     * @return string
+     */
+    public function getMovedFileName(): ?string
+    {
+        if ($this->fileName && $this->extension) {
+            return substr($this->fileName,0,50).'_'.$this->uuid.'.'.$this->extension;
+        }
+        return $this->uuid;
+    }
+
+    private function parseFileName(string $fileName)
+    {
+        if (Str::isUuid($fileName)) {
+            $this->uuid = $fileName;
+            return;
+        }
+
+        if (!str_contains($fileName, '_')) {
+            return;
+        }
+
+        $candidateString = substr($fileName, strrpos($fileName, '_') + 1);
+        if (!str_contains($candidateString, '.')
+            || !Str::isUuid(substr($candidateString, 0, strpos($candidateString, '.')))) {
+            return;
+        }
+
+        try {
+            $this->uuid = substr($candidateString, 0, strpos($candidateString, '.'));
+            $this->fileName = substr($fileName, 0, strrpos($fileName, '_'));
+            // get everything after the last dot
+            $this->extension = substr($candidateString, strrpos($candidateString, '.') + 1);
+        } catch (\Exception $e) {
+            return;
+        }
+    }
+
+    public static function parse(string $fileName): self
+    {
+        return new self($fileName);
+    }
+
+}