[Form] Implemented ArrayToPartsTransformer and ValueToDuplicatesTransformer

src/Symfony/Component/Form/ValueTransformer/ArrayToPartsTransformer.php

@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\ValueTransformer;
+
+use Symfony\Component\Form\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bernhard.schussek@symfony-project.com>
+ */
+class ArrayToPartsTransformer implements ValueTransformerInterface
+{
+    private $partMapping;
+
+    public function __construct(array $partMapping)
+    {
+        $this->partMapping = $partMapping;
+    }
+
+    public function transform($array)
+    {
+        if (null === $array) {
+            $array = array();
+        }
+
+        if (!is_array($array) ) {
+            throw new UnexpectedTypeException($array, 'array');
+        }
+
+        $result = array();
+
+        foreach ($this->partMapping as $partKey => $originalKeys) {
+            if (empty($array)) {
+                $result[$partKey] = null;
+            } else {
+                $result[$partKey] = array_intersect_key($array, array_flip($originalKeys));
+            }
+        }
+
+        return $result;
+    }
+
+    public function reverseTransform($array)
+    {
+        if (!is_array($array) ) {
+            throw new UnexpectedTypeException($array, 'array');
+        }
+
+        $result = array();
+        $emptyKeys = array();
+
+        foreach ($this->partMapping as $partKey => $originalKeys) {
+            if (!empty($array[$partKey])) {
+                foreach ($originalKeys as $originalKey) {
+                    if (isset($array[$partKey][$originalKey])) {
+                        $result[$originalKey] = $array[$partKey][$originalKey];
+                    }
+                }
+            } else {
+                $emptyKeys[] = $partKey;
+            }
+        }
+
+        if (count($emptyKeys) > 0) {
+            if (count($emptyKeys) === count($this->partMapping)) {
+                // All parts empty
+                return null;
+            }
+
+            throw new TransformationFailedException(sprintf(
+                    'The keys "%s" should not be empty', implode('", "', $emptyKeys)));
+        }
+
+        return $result;
+    }
+}

src/Symfony/Component/Form/ValueTransformer/ValueToDuplicatesTransformer.php

@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\ValueTransformer;
+
+use Symfony\Component\Form\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bernhard.schussek@symfony-project.com>
+ */
+class ValueToDuplicatesTransformer implements ValueTransformerInterface
+{
+    private $keys;
+
+    public function __construct(array $keys)
+    {
+        $this->keys = $keys;
+    }
+
+    public function transform($value)
+    {
+        $result = array();
+
+        foreach ($this->keys as $key) {
+            $result[$key] = $value;
+        }
+
+        return $result;
+    }
+
+    public function reverseTransform($array)
+    {
+        if (!is_array($array) ) {
+            throw new UnexpectedTypeException($array, 'array');
+        }
+
+        $result = current($array);
+        $emptyKeys = array();
+
+        foreach ($this->keys as $key) {
+            if (!empty($array[$key])) {
+                if ($array[$key] !== $result) {
+                    throw new TransformationFailedException(
+                            'All values in the array should be the same');
+                }
+            } else {
+                $emptyKeys[] = $key;
+            }
+        }
+
+        if (count($emptyKeys) > 0) {
+            if (count($emptyKeys) === count($this->keys)) {
+                // All keys empty
+                return null;
+            }
+
+            throw new TransformationFailedException(sprintf(
+                    'The keys "%s" should not be empty', implode('", "', $emptyKeys)));
+        }
+
+        return $result;
+    }
+}

tests/Symfony/Tests/Component/Form/ValueTransformer/ArrayToPartsTransformerTest.php

@@ -0,0 +1,144 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Tests\Component\Form\ValueTransformer;
+
+use Symfony\Component\Form\ValueTransformer\ArrayToPartsTransformer;
+
+class ArrayToPartsTransformerTest extends \PHPUnit_Framework_TestCase
+{
+    private $transformer;
+
+    protected function setUp()
+    {
+        $this->transformer = new ArrayToPartsTransformer(array(
+            'first' => array('a', 'b', 'c'),
+            'second' => array('d', 'e', 'f'),
+        ));
+    }
+
+    public function testTransform()
+    {
+        $input = array(
+            'a' => '1',
+            'b' => '2',
+            'c' => '3',
+            'd' => '4',
+            'e' => '5',
+            'f' => '6',
+        );
+
+        $output = array(
+            'first' => array(
+                'a' => '1',
+                'b' => '2',
+                'c' => '3',
+            ),
+            'second' => array(
+                'd' => '4',
+                'e' => '5',
+                'f' => '6',
+            ),
+        );
+
+        $this->assertSame($output, $this->transformer->transform($input));
+    }
+
+    public function testTransform_empty()
+    {
+        $output = array(
+            'first' => null,
+            'second' => null,
+        );
+
+        $this->assertSame($output, $this->transformer->transform(null));
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\Exception\UnexpectedTypeException
+     */
+    public function testTransformRequiresArray()
+    {
+        $this->transformer->transform('12345');
+    }
+
+    public function testReverseTransform()
+    {
+        $input = array(
+            'first' => array(
+                'a' => '1',
+                'b' => '2',
+                'c' => '3',
+            ),
+            'second' => array(
+                'd' => '4',
+                'e' => '5',
+                'f' => '6',
+            ),
+        );
+
+        $output = array(
+            'a' => '1',
+            'b' => '2',
+            'c' => '3',
+            'd' => '4',
+            'e' => '5',
+            'f' => '6',
+        );
+
+        $this->assertSame($output, $this->transformer->reverseTransform($input));
+    }
+
+    public function testReverseTransform_completelyEmpty()
+    {
+        $input = array(
+            'first' => '',
+            'second' => '',
+        );
+
+        $this->assertNull($this->transformer->reverseTransform($input));
+    }
+
+    public function testReverseTransform_completelyNull()
+    {
+        $input = array(
+            'first' => null,
+            'second' => null,
+        );
+
+        $this->assertNull($this->transformer->reverseTransform($input));
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\ValueTransformer\TransformationFailedException
+     */
+    public function testReverseTransform_partiallyNull()
+    {
+        $input = array(
+            'first' => array(
+                'a' => '1',
+                'b' => '2',
+                'c' => '3',
+            ),
+            'second' => null,
+        );
+
+        $this->transformer->reverseTransform($input);
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\Exception\UnexpectedTypeException
+     */
+    public function testReverseTransformRequiresArray()
+    {
+        $this->transformer->reverseTransform('12345');
+    }
+}

tests/Symfony/Tests/Component/Form/ValueTransformer/ValueToDuplicatesTransformerTest.php

@@ -0,0 +1,115 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Tests\Component\Form\ValueTransformer;
+
+use Symfony\Component\Form\ValueTransformer\ValueToDuplicatesTransformer;
+
+class ValueToDuplicatesTransformerTest extends \PHPUnit_Framework_TestCase
+{
+    private $transformer;
+
+    protected function setUp()
+    {
+        $this->transformer = new ValueToDuplicatesTransformer(array('a', 'b', 'c'));
+    }
+
+    public function testTransform()
+    {
+        $output = array(
+            'a' => 'Foo',
+            'b' => 'Foo',
+            'c' => 'Foo',
+        );
+
+        $this->assertSame($output, $this->transformer->transform('Foo'));
+    }
+
+    public function testTransform_empty()
+    {
+        $output = array(
+            'a' => null,
+            'b' => null,
+            'c' => null,
+        );
+
+        $this->assertSame($output, $this->transformer->transform(null));
+    }
+
+    public function testReverseTransform()
+    {
+        $input = array(
+            'a' => 'Foo',
+            'b' => 'Foo',
+            'c' => 'Foo',
+        );
+
+        $this->assertSame('Foo', $this->transformer->reverseTransform($input));
+    }
+
+    public function testReverseTransform_completelyEmpty()
+    {
+        $input = array(
+            'a' => '',
+            'b' => '',
+            'c' => '',
+        );
+
+        $this->assertNull($this->transformer->reverseTransform($input));
+    }
+
+    public function testReverseTransform_completelyNull()
+    {
+        $input = array(
+            'a' => null,
+            'b' => null,
+            'c' => null,
+        );
+
+        $this->assertNull($this->transformer->reverseTransform($input));
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\ValueTransformer\TransformationFailedException
+     */
+    public function testReverseTransform_partiallyNull()
+    {
+        $input = array(
+            'a' => 'Foo',
+            'b' => 'Foo',
+            'c' => null,
+        );
+
+        $this->transformer->reverseTransform($input);
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\ValueTransformer\TransformationFailedException
+     */
+    public function testReverseTransform_differences()
+    {
+        $input = array(
+            'a' => 'Foo',
+            'b' => 'Bar',
+            'c' => 'Foo',
+        );
+
+        $this->transformer->reverseTransform($input);
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\Exception\UnexpectedTypeException
+     */
+    public function testReverseTransformRequiresArray()
+    {
+        $this->transformer->reverseTransform('12345');
+    }
+}