refactor: interface isolated from underlying libraries

src/QrCodeWriter.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PetrKnap\SpaydQr;
+
+use Endroid\QrCode\Writer\PngWriter;
+use Endroid\QrCode\Writer\SvgWriter;
+use Endroid\QrCode\Writer\WriterInterface;
+
+enum QrCodeWriter
+{
+    case Png;
+    case Svg;
+
+    /**
+     * @internal factory
+     */
+    public function endroid(): WriterInterface
+    {
+        return match ($this) {
+            self::Png => new PngWriter(),
+            self::Svg => new SvgWriter(),
+        };
+    }
+}

src/SpaydQr.php

@@ -7,16 +7,15 @@
 use Endroid\QrCode\Builder\Builder;
 use Endroid\QrCode\Builder\BuilderInterface;
 use Endroid\QrCode\Encoding\Encoding;
-use Endroid\QrCode\Writer\PngWriter;
 use Endroid\QrCode\Writer\Result\ResultInterface;
-use Endroid\QrCode\Writer\WriterInterface;
 use Money\Currencies\ISOCurrencies;
 use Money\Formatter\DecimalMoneyFormatter;
 use Money\Money;
 use Sunfox\Spayd\Spayd;
 
 /**
  * @todo make it final
+ * @todo create SpaydBuilder
  */
 class SpaydQr implements SpaydQrInterface
 {
@@ -35,12 +34,12 @@ protected function __construct(
             ->add(self::SPAYD_CURRENCY, $money->getCurrency()->getCode());
     }
 
-    public static function create(string $iban, Money $money, WriterInterface $writer = null): self
+    public static function create(string $iban, Money $money, QrCodeWriter $writer = QrCodeWriter::Png): self
     {
         return new self(
             new Spayd(),
             Builder::create()
-                ->writer($writer ?: new PngWriter())
+                ->writer($writer->endroid())
                 ->encoding(new Encoding('UTF-8')),
             $iban,
             $money
@@ -87,9 +86,9 @@ public function setInvoice(
         return $this;
     }
 
-    public function setWriter(WriterInterface $writer): self
+    public function setWriter(QrCodeWriter $writer): self
     {
-        $this->qrCodeBuilder->writer($writer);
+        $this->qrCodeBuilder->writer($writer->endroid());
 
         return $this;
     }

src/SpaydQrInterface.php

@@ -4,7 +4,6 @@
 
 namespace PetrKnap\SpaydQr;
 
-use Endroid\QrCode\Writer\WriterInterface;
 use Money\Money;
 
 interface SpaydQrInterface
@@ -44,10 +43,7 @@ public function setInvoice(
         ?string $description
     ): self;
 
-    /**
-     * @todo create own enum of writers
-     */
-    public function setWriter(WriterInterface $writer): self;
+    public function setWriter(QrCodeWriter $writer): self;
 
     public function getContentType(): string;
 

tests/SpaydQrTest.php

@@ -32,11 +32,11 @@ public function testFactoryWorks()
 
     public function testSetWriterWorks()
     {
-        $writer = $this->getMockBuilder(WriterInterface::class)->getMock();
+        $writer = QrCodeWriter::Svg;
         $qrCodeBuilder = $this->getMockBuilder(BuilderInterface::class)->getMock();
         $qrCodeBuilder->expects($this->once())
             ->method('writer')
-            ->with($writer)
+            ->with($writer->endroid())
             ->willReturnSelf();
 
         $this->getSpaydQr(null, $qrCodeBuilder)->setWriter($writer);
@@ -245,7 +245,7 @@ public function dataWriteFileWorks()
     public function testEndToEnd()
     {
         $spaydQr = $this->getSpaydQr(null, null)
-            ->setWriter(new SvgWriter())
+            ->setWriter(QrCodeWriter::Svg)
             ->setVariableSymbol(123)
             ->setInvoice(
                 '1',