Add fluent interface for the dimensions rule

src/Illuminate/Validation/Rule.php

@@ -27,4 +27,15 @@ public static function unique($table, $column = 'NULL')
     {
         return new Rules\Unique($table, $column);
     }
+
+    /**
+     * Get a dimensions constraint builder instance.
+     *
+     * @param  array  $constraints
+     * @return \Illuminate\Validation\Rules\Dimensions
+     */
+    public static function dimensions(array $constraints = [])
+    {
+        return new Rules\Dimensions($constraints);
+    }
 }

src/Illuminate/Validation/Rules/Dimensions.php

@@ -0,0 +1,131 @@
+<?php
+
+namespace Illuminate\Validation\Rules;
+
+class Dimensions
+{
+    /**
+     * The constraints for the dimensions rule.
+     *
+     * @var array
+     */
+    protected $constraints = [];
+
+    /**
+     * Create a new dimensions rule instance.
+     *
+     * @param  array  $constraints;
+     * @return void
+     */
+    public function __construct(array $constraints = [])
+    {
+        $this->constraints = $constraints;
+    }
+
+    /**
+     * Set the "width" constraint.
+     *
+     * @param  int  $value
+     * @return $this
+     */
+    public function width($value)
+    {
+        $this->constraints['width'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Set the "height" constraint.
+     *
+     * @param  int  $value
+     * @return $this
+     */
+    public function height($value)
+    {
+        $this->constraints['height'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Set the "min width" constraint.
+     *
+     * @param  int  $value
+     * @return $this
+     */
+    public function minWidth($value)
+    {
+        $this->constraints['min_width'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Set the "min height" constraint.
+     *
+     * @param  int  $value
+     * @return $this
+     */
+    public function minHeight($value)
+    {
+        $this->constraints['min_height'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Set the "max width" constraint.
+     *
+     * @param  int  $value
+     * @return $this
+     */
+    public function maxWidth($value)
+    {
+        $this->constraints['max_width'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Set the "max height" constraint.
+     *
+     * @param  int  $value
+     * @return $this
+     */
+    public function maxHeight($value)
+    {
+        $this->constraints['max_height'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Set the "ratio" constraint.
+     *
+     * @param  float  $value
+     * @return $this
+     */
+    public function ratio($value)
+    {
+        $this->constraints['ratio'] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Convert the rule to a validation string.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        $result = "";
+
+        foreach ($this->constraints as $key => $value) {
+            $result .= "$key=$value,";
+        }
+
+        return 'dimensions:'.substr($result, 0, -1);
+    }
+}

tests/Validation/ValidationDimensionsRuleTest.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Validation\Rule;
+use Illuminate\Validation\Rules\Dimensions;
+
+class ValidationDimensionsRuleTest extends PHPUnit_Framework_TestCase
+{
+    public function testItCorrectlyFormatsAStringVersionOfTheRule()
+    {
+        $rule = new Dimensions(['min_width' => 100, 'min_height' => 100]);
+
+        $this->assertEquals('dimensions:min_width=100,min_height=100', (string) $rule);
+
+        $rule = Rule::dimensions()->width(200)->height(100);
+
+        $this->assertEquals('dimensions:width=200,height=100', (string) $rule);
+
+        $rule = Rule::dimensions()->maxWidth(1000)->maxHeight(500)->ratio(3/2);
+
+        $this->assertEquals('dimensions:max_width=1000,max_height=500,ratio=1.5', (string) $rule);
+    }
+}