Adding Xliff Loader for meta (#13)

* Adding Xliff Loader for meta

* Applied changes from StyleCI

* Moved fixtures

Author: Nyholm

src/Loader/XliffLoader.php

@@ -49,7 +49,53 @@ public function extractFromContent($content, MessageCatalogue $catalogue, $domai
         }
 
         if ('2.0' === $xliffVersion) {
-            NSA::invokeMethod($this, 'extractXliff2', $dom, $catalogue, $domain);
+            $this->extractXliff2($dom, $catalogue, $domain);
+        }
+    }
+
+    /**
+     * @param \DOMDocument     $dom
+     * @param MessageCatalogue $catalogue
+     * @param string           $domain
+     */
+    private function extractXliff2(\DOMDocument $dom, MessageCatalogue $catalogue, $domain)
+    {
+        $xml = simplexml_import_dom($dom);
+        $encoding = strtoupper($dom->encoding);
+
+        $xml->registerXPathNamespace('xliff', 'urn:oasis:names:tc:xliff:document:2.0');
+
+        foreach ($xml->xpath('//xliff:unit') as $unit) {
+            $segment = $unit->segment;
+            $source = $segment->source;
+
+            // If the xlf file has another encoding specified, try to convert it because
+            // simple_xml will always return utf-8 encoded values
+            $target = $this->utf8ToCharset((string) (isset($segment->target) ? $segment->target : $source), $encoding);
+
+            $catalogue->set((string) $source, $target, $domain);
+
+            $metadata = [];
+            if (isset($segment->target) && $segment->target->attributes()) {
+                $metadata['target-attributes'] = [];
+                foreach ($segment->target->attributes() as $key => $value) {
+                    $metadata['target-attributes'][$key] = (string) $value;
+                }
+            }
+
+            if (isset($unit->notes)) {
+                $metadata['notes'] = [];
+                foreach ($unit->notes->note as $noteNode) {
+                    $note = [];
+                    foreach ($noteNode->attributes() as $key => $value) {
+                        $note[$key] = (string) $value;
+                    }
+                    $note['content'] = (string) $noteNode;
+                    $metadata['notes'][] = $note;
+                }
+            }
+
+            $catalogue->setMetadata((string) $source, $metadata, $domain);
         }
     }
 
@@ -121,4 +167,21 @@ private function getXmlErrors($internalErrors)
 
         return $errors;
     }
+
+    /**
+     * Convert a UTF8 string to the specified encoding.
+     *
+     * @param string $content  String to decode
+     * @param string $encoding Target encoding
+     *
+     * @return string
+     */
+    private function utf8ToCharset($content, $encoding = null)
+    {
+        if ('UTF-8' !== $encoding && !empty($encoding)) {
+            return mb_convert_encoding($content, $encoding, 'UTF-8');
+        }
+
+        return $content;
+    }
 }

tests/Fixtures/meta.en.xlf

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xliff xmlns="urn:oasis:names:tc:xliff:document:2.0" version="2.0" srcLang="fr-FR" trgLang="en-US">
+    <file id="messages.en_US">
+        <unit id="LCa0a2j">
+            <notes>
+                <note category="state">new</note>
+                <note category="approved">true</note>
+                <note category="section" priority="1">user login</note>
+            </notes>
+            <segment>
+                <source>foo</source>
+                <target>bar</target>
+            </segment>
+        </unit>
+    </file>
+</xliff>

tests/Unit/Loader/XliffLoaderTest.php

@@ -92,4 +92,30 @@ public function testXliff20()
         $this->assertTrue($catalogue->defines('key0'));
         $this->assertTrue($catalogue->defines('key1'));
     }
+
+    public function testXliff20Meta()
+    {
+        if (Kernel::VERSION_ID < 20800) {
+            $this->markTestSkipped('Symfony <2.8 is not supported. ');
+        }
+
+        $content = file_get_contents(__DIR__.'/../../Fixtures/meta.en.xlf');
+
+        $catalogue = new MessageCatalogue('en');
+        (new XliffLoader())->extractFromContent($content, $catalogue, 'messages');
+        $this->assertTrue($catalogue->defines('foo'));
+        $metadata = $catalogue->getMetadata('foo');
+        $this->assertNotEmpty($metadata);
+        $this->assertCount(3, $metadata['notes']);
+
+        $this->assertEquals('state', $metadata['notes'][0]['category']);
+        $this->assertEquals('new', $metadata['notes'][0]['content']);
+
+        $this->assertEquals('approved', $metadata['notes'][1]['category']);
+        $this->assertEquals('true', $metadata['notes'][1]['content']);
+
+        $this->assertEquals('section', $metadata['notes'][2]['category']);
+        $this->assertEquals('1', $metadata['notes'][2]['priority']);
+        $this->assertEquals('user login', $metadata['notes'][2]['content']);
+    }
 }