Add support for DropShadow effect

Co-authored-by: carlevison <54800761+carlevison@users.noreply.github.com>

Author: const-cloudinary

src/Transformation/Effect/Misc/DropShadow.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * This file is part of the Cloudinary PHP package.
+ *
+ * (c) Cloudinary
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Cloudinary\Transformation;
+
+/**
+ * Class DropShadow
+ */
+class DropShadow extends EffectAction
+{
+    /**
+     * DropShadow constructor.
+     *
+     * @param int $azimuth   Value in range 0 - 360 (degrees).
+     * @param int $elevation Value in range 0 - 90 (degrees).
+     * @param int $spread    Value in range 0 -100.
+     */
+    public function __construct($azimuth = null, $elevation = null, $spread = null)
+    {
+        parent::__construct(new DropShadowQualifier($azimuth, $elevation, $spread));
+    }
+
+    /**
+     * Sets the direction the light is coming from to cause the shadow effect. 
+     *
+     * @param int $azimuth Value in range 0 - 360 (degrees).
+     *
+     * @return $this
+     */
+    public function azimuth($azimuth)
+    {
+        $this->getMainQualifier()->azimuth($azimuth);
+
+        return $this;
+    }
+
+    /**
+     *  Sets the height of the light source above the 'ground' to cause the shadow effect.
+     *
+     * @param int $elevation Value in range 0 - 90 (degrees).
+     *
+     * @return $this
+     */
+    public function elevation($elevation)
+    {
+        $this->getMainQualifier()->elevation($elevation);
+
+        return $this;
+    }
+
+    /**
+     * Sets the spread of the light source. A small number means 'point' light. A larger number means 'area' light. 
+     *
+     * @param int $spread Value in range 0 -100.
+     *
+     * @return $this
+     */
+    public function spread($spread)
+    {
+        $this->getMainQualifier()->spread($spread);
+
+        return $this;
+    }
+}

src/Transformation/Effect/Misc/DropShadowQualifier.php

@@ -0,0 +1,77 @@
+<?php
+/**
+ * This file is part of the Cloudinary PHP package.
+ *
+ * (c) Cloudinary
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Cloudinary\Transformation;
+
+/**
+ * Class DropShadowQualifier
+ */
+class DropShadowQualifier extends EffectQualifier
+{
+    /**
+     * DropShadowQualifier constructor.
+     *
+     * @param int $azimuth   Value in range 0 - 360 (degrees).
+     * @param int $elevation Value in range 0 - 90 (degrees).
+     * @param int $spread    Value in range 0 -100.
+     */
+    public function __construct($azimuth = null, $elevation = null, $spread = null)
+    {
+        parent::__construct(MiscEffect::DROP_SHADOW);
+
+        $this->value->setSimpleValue('properties', new ListExpressionQualifierMultiValue());
+
+        $this->azimuth($azimuth);
+        $this->elevation($elevation);
+        $this->spread($spread);
+    }
+
+    /**
+     * Sets the direction the light is coming from to cause the shadow effect. 
+     *
+     * @param int $azimuth Value in range 0 - 360 (degrees).
+     *
+     * @return $this
+     */
+    public function azimuth($azimuth)
+    {
+        $this->value->getSimpleValue('properties')->setSimpleNamedValue('azimuth', $azimuth);
+
+        return $this;
+    }
+
+    /**
+     *  Sets the height of the light source above the 'ground' to cause the shadow effect.
+     *
+     * @param int $elevation Value in range 0 - 90 (degrees).
+     *
+     * @return $this
+     */
+    public function elevation($elevation)
+    {
+        $this->value->getSimpleValue('properties')->setSimpleNamedValue('elevation', $elevation);
+
+        return $this;
+    }
+
+    /**
+     * Sets the spread of the light source. A small number means 'point' light. A larger number means 'area' light. 
+     *
+     * @param int $spread Value in range 0 -100.
+     *
+     * @return $this
+     */
+    public function spread($spread)
+    {
+        $this->value->getSimpleValue('properties')->setSimpleNamedValue('spread', $spread);
+
+        return $this;
+    }
+}

src/Transformation/Effect/Misc/MiscEffect.php

@@ -23,4 +23,5 @@ abstract class MiscEffect
     const ADVANCED_RED_EYE = 'adv_redeye';
     const VECTORIZE        = 'vectorize';
     const OUTLINE          = 'outline';
+    const DROP_SHADOW      = 'dropshadow';
 }

src/Transformation/Effect/Misc/MiscEffectTrait.php

@@ -185,4 +185,20 @@ public static function shadow($strength = null, $position = null, $color = null)
     {
         return new Shadow($strength, $position, $color);
     }
+
+    /**
+     * Adds a natural looking shadow to an image.
+     *
+     * @param int $azimuth   Value in range 0 - 360 (degrees).
+     * @param int $elevation Value in range 0 - 90 (degrees).
+     * @param int $spread    Value in range 0 -100.
+     *
+     * @return DropShadow
+     *
+     * @see \Cloudinary\Transformation\DropShadow
+     */
+    public static function dropShadow($azimuth = null, $elevation = null, $spread = null)
+    {
+        return new DropShadow($azimuth, $elevation, $spread);
+    }
 }

src/Transformation/Qualifier/QualifierValue/ListExpressionQualifierMultiValue.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * This file is part of the Cloudinary PHP package.
+ *
+ * (c) Cloudinary
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Cloudinary\Transformation;
+
+use Cloudinary\Transformation\Qualifier\BaseQualifier;
+
+/**
+ * Class ListExpressionQualifierMultiValue
+ *
+ * This class represents a complex list expression value of the cloudinary transformation qualifier.
+ *
+ * @used-by BaseQualifier
+ */
+class ListExpressionQualifierMultiValue extends ExpressionQualifierMultiValue
+{
+    const VALUE_DELIMITER = ';';
+}

tests/Unit/Transformation/Common/EffectTest.php

@@ -10,6 +10,7 @@
 
 namespace Cloudinary\Test\Unit\Transformation\Common;
 
+use Cloudinary\Test\TransformationTestCase;
 use Cloudinary\Transformation\Argument\Color;
 use Cloudinary\Transformation\Argument\PointValue;
 use Cloudinary\Transformation\ArtisticFilter;
@@ -27,12 +28,11 @@
 use Cloudinary\Transformation\WhiteBalance;
 use Cloudinary\Transformation\Xmp;
 use OutOfRangeException;
-use PHPUnit\Framework\TestCase;
 
 /**
  * Class SampleTest
  */
-final class EffectTest extends TestCase
+final class EffectTest extends TransformationTestCase
 {
     protected $effectLevel = 17;
     protected $effectNegativeLevel = -17;
@@ -298,6 +298,26 @@ public function testShadow()
         );
     }
 
+    public function testDropShadow()
+    {
+        self::assertStrEquals(
+            'e_dropshadow',
+            Effect::dropShadow()
+        );
+        self::assertStrEquals(
+            'e_dropshadow:elevation_11',
+            Effect::dropShadow()->elevation(11)
+        );
+        self::assertEquals(
+            'e_dropshadow:azimuth_10;elevation_11;spread_12',
+            Effect::dropShadow()->azimuth(10)->elevation(11)->spread(12)
+        );
+        self::assertEquals(
+            'e_dropshadow:azimuth_10;elevation_11;spread_12',
+            Effect::dropShadow()->spread(12)->elevation(11)->azimuth(10)
+        );
+    }
+
     public function testTrimImageEffect()
     {
         self::assertEquals(