Lower flysystem dependency

.gitignore

@@ -6,3 +6,4 @@ tmp/
 .vs/
 .vscode/
 coverage/
+.phpunit*

composer.json

@@ -10,21 +10,26 @@
     }
   ],
   "require": {
+    "php": "^8.0",
     "league/flysystem": "^1.0",
     "psr/http-message": "^1.0",
     "guzzlehttp/psr7": "^1.4"
   },
   "require-dev": {
-        "phpunit/phpunit": "^7.0"
+    "phpunit/phpunit": "^9.5"
   },
   "autoload": {
     "psr-4": {
-            "IQParts\\Content\\": ["src"]
+      "IQParts\\Content\\": [
+        "src"
+      ]
     }
   },
   "autoload-dev": {
     "psr-4": {
-            "IQParts\\ContentTest\\": ["test"]
+      "IQParts\\ContentTest\\": [
+        "test"
+      ]
     }
   }
 }

src/Object/File.php

@@ -48,6 +48,10 @@ final class File extends Item
      * @var bool
      */
     private $isEditable;
+    /**
+     * @var string
+     */
+    private $content = null;
 
     /**
      * PublicFile constructor.
@@ -82,7 +86,15 @@ final class File extends Item
                 $parent = substr($this->path, 0, $parentSep);
             } else $parent = '/';
             $this->parent = base64_encode($parent);
-            if ($editable[$extension] ?? false && $file->read() !== false) {
+
+            $isEditable = $editable[$extension] ?? false;
+            $content = false;
+            if ($isEditable) {
+                $content = $file->read();
+            }
+
+            if ($isEditable && $content !== false) {
+                $this->content = $content;
                 $this->isEditable = true;
             } else {
                 $this->isEditable = false;
@@ -175,6 +187,7 @@ final class File extends Item
      */
     public function getContents()
     {
+        if ($this->content !== null) return $this->content;
         return $this->file->read();
     }