Add MimeSniffer constructor

README.md

@@ -64,7 +64,7 @@ If your prefer non-static initialization:
 use Intervention\MimeSniffer\MimeSniffer;
 
 // create instance with constructor
-$sniffer = new MimeSniffer();
+$sniffer = new MimeSniffer($content);
 
 // with setter for given content
 $type = $sniffer->setFromString($other_content)->getType();

src/MimeSniffer.php

@@ -5,6 +5,8 @@
 namespace Intervention\MimeSniffer;
 
 use Intervention\MimeSniffer\Interfaces\TypeInterface;
+use InvalidArgumentException;
+use RuntimeException;
 
 class MimeSniffer
 {
@@ -16,26 +18,35 @@ class MimeSniffer
     protected string $content;
 
     /**
-     * Universal factory method
+     * Create new instance
      *
      * @param mixed $content
-     * @return MimeSniffer
+     * @return void
      */
-    public static function create(mixed $content): self
+    public function __construct(mixed $content = null)
     {
         if (is_string($content) && file_exists($content)) {
-            return self::createFromFilename($content);
+            $this->setFromFilename($content);
         }
 
         if (is_string($content)) {
-            return self::createFromString($content);
+            $this->setFromString($content);
         }
 
         if (is_resource($content)) {
-            return self::createFromPointer($content);
+            $this->setFromPointer($content);
         }
+    }
 
-        return new self();
+    /**
+     * Universal factory method
+     *
+     * @param mixed $content
+     * @return MimeSniffer
+     */
+    public static function create(mixed $content): self
+    {
+        return new self($content);
     }
 
     /**
@@ -113,6 +124,10 @@ public static function createFromPointer($pointer): self
      */
     public function setFromPointer($pointer): self
     {
+        if (!is_resource($pointer)) {
+            throw new InvalidArgumentException('Argument #1 $pointer must be of type resource.');
+        }
+
         $this->setFromString(fread($pointer, 1024));
 
         return $this;

tests/MimeSnifferTest.php

@@ -18,6 +18,21 @@ public function testConstructor(): void
     {
         $sniffer = new MimeSniffer();
         $this->assertInstanceOf(MimeSniffer::class, $sniffer);
+
+        $sniffer = new MimeSniffer(
+            __DIR__ . '/../tests/files/test.jpg',
+        );
+        $this->assertInstanceOf(MimeSniffer::class, $sniffer);
+
+        $sniffer = new MimeSniffer(
+            fopen(__DIR__ . '/../tests/files/test.jpg', 'r')
+        );
+        $this->assertInstanceOf(MimeSniffer::class, $sniffer);
+
+        $sniffer = new MimeSniffer(
+            'foo'
+        );
+        $this->assertInstanceOf(MimeSniffer::class, $sniffer);
     }
 
     public function testCreate(): void