Implement DPR option

src/Builder.php

@@ -83,6 +83,19 @@ public function width($width)
         return $this;
     }
 
+    /**
+     * Set the desired dpr of the image.
+     *
+     * @param mixed $dpr
+     * @return $this
+     */
+    public function dpr($dpr = 'auto')
+    {
+        $this->manipulations['dpr'] = $dpr;
+
+        return $this;
+    }
+
     /**
      * Get the string representation of all manipulations that
      * need to be executed on the given resource.

src/Client.php

@@ -20,6 +20,10 @@ class Client
      * @var array
      */
     private $config;
+    /**
+     * @var array
+     */
+    protected $defaults = [];
 
     /**
      * Client constructor.
@@ -81,14 +85,33 @@ public function fetch($url)
     {
         $this->builder = new Builder(urlencode($url));
 
+        foreach ($this->defaults as $key => $value) {
+            if (method_exists($this->builder, $key)) {
+                call_user_func([$this->builder, $key], $value);
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Set the default dpr.
+     *
+     * @param string $key
+     * @param mixed $value
+     * @return $this
+     */
+    public function default($key, $value)
+    {
+        $this->defaults[$key] = $value;
+
         return $this;
     }
 
     /**
      * Retrieve the imaginary url.
      *
      * @return string
-     * @throws InvalidConfigurationException
      */
     public function url()
     {

tests/ClientTest.php

@@ -114,6 +114,16 @@ function it_can_generate_a_url_with_a_radius_manipulation()
         $this->assertContains('r_50', $url);
     }
 
+    /** @test */
+    function it_can_generate_a_url_with_a_dpr_modifier()
+    {
+        $url = $this->client->fetch('https://www.google.com/logo.jpg')
+            ->dpr(3)
+            ->url();
+
+        $this->assertContains('dpr_3', $url);
+    }
+
     /** @test */
     function it_can_generate_a_url_to_fetch_an_image_with_multiple_manipulations()
     {
@@ -189,4 +199,34 @@ function it_will_be_possible_to_use_the_same_client_for_multiple_fetches_on_diff
         $third = $this->client->fetch($path = 'https://www.google.com/logo.jpg')->width(200)->height(200);
         $this->assertEquals('https://imaginary.com/imaginary/images/fetch/w_200,h_200/' . urlencode($path), $third->url());
     }
+
+    /** @test */
+    function it_can_have_a_globally_defined_dpr_and_will_use_that_by_default()
+    {
+        $this->client->default('dpr', 2);
+
+        $url = $this->client->fetch('https://www.google.com/logo.jpg')
+            ->url();
+
+        $this->assertContains('dpr_2', $url);
+
+        $url = $this->client->fetch('https://www.google.com/logo.jpg')
+            ->dpr(4)
+            ->url();
+
+        $this->assertContains('dpr_4', $url);
+    }
+
+    /** @test */
+    public function it_can_set_default_values_for_the_builder()
+    {
+        $this->client->default('dpr', 2);
+        $this->client->default('invalid', 'value');
+
+        $url = $this->client->fetch('https://www.google.com/logo.jpg')
+            ->url();
+
+        $this->assertContains('dpr_2', $url);
+        $this->assertNotContains('invalid', $url);
+    }
 }