add simple json dictionary generator

Author: gator92

src/Generators/JsonDictionary.php

@@ -0,0 +1,32 @@
+<?php
+namespace Gettext\Generators;
+
+use Gettext\Translations;
+
+class JsonDictionary extends Generator implements GeneratorInterface
+{
+    /**
+     * {@parentDoc}
+     */
+    public static function toString(Translations $translations)
+    {
+        $array = PhpArray::toArray($translations);
+
+        //for a simple json translation dictionary, one domain is supported
+        $values = current($array);
+
+        // remove meta / header data
+        if (array_key_exists('', $values)) {
+            unset($values['']);
+        }
+
+        //map to a simple json dictionary (no plurals)
+        return json_encode(
+            array_filter(
+                array_map(function ($val) {
+                    return $val[1];
+                }, $values)
+            )
+        );
+    }
+}

tests/JsonDictionaryGeneratorTest.php

@@ -0,0 +1,22 @@
+<?php
+include_once dirname(__DIR__).'/src/autoloader.php';
+
+class JsonDictionaryGeneratorTest extends PHPUnit_Framework_TestCase
+{
+    public function testGeneration()
+    {
+        //Extract translations
+        $translations = Gettext\Extractors\PhpCode::fromFile(__DIR__.'/files/phpcode.php');
+        //verify existance of extracted translations
+        $this->assertEquals(12, count($translations));
+        $translation = $translations->find('', 'text 2');
+        $this->assertInstanceOf('Gettext\\Translation', $translation);
+        //set translation
+        $translation->setTranslation('apple');
+        //set plural
+        $translation->setPlural('apples');
+        //generate json dict - skips meta, empty translations and plurals
+        $json = Gettext\Generators\JsonDictionary::toString($translations);
+        $this->assertEquals('{"text 2":"apple"}', $json);
+    }
+}