feature #27655 [Translation] Added support for translation files with…

… other filename patterns (javiereguiluz)

This PR was squashed before being merged into the 4.2-dev branch (closes #27655).

Discussion
----------

[Translation] Added support for translation files with other filename patterns

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #27644
| License       | MIT
| Doc PR        | -

This implements the #27644 feature request in case we accept it.

My vote is 👍 because the changes required are tiny and the resulting code is even more robust thanks to the new `preg_match()` call.

Commits
-------

0ee912d [Translation] Added support for translation files with other filename patterns

src/Symfony/Component/Translation/Command/XliffLintCommand.php

@@ -34,13 +34,15 @@ class XliffLintCommand extends Command
     private $displayCorrectFiles;
     private $directoryIteratorProvider;
     private $isReadableProvider;
+    private $requireStrictFileNames;
 
-    public function __construct(string $name = null, callable $directoryIteratorProvider = null, callable $isReadableProvider = null)
+    public function __construct(string $name = null, callable $directoryIteratorProvider = null, callable $isReadableProvider = null, bool $requireStrictFileNames = true)
     {
         parent::__construct($name);
 
         $this->directoryIteratorProvider = $directoryIteratorProvider;
         $this->isReadableProvider = $isReadableProvider;
+        $this->requireStrictFileNames = $requireStrictFileNames;
     }
 
     /**
@@ -116,14 +118,16 @@ private function validate($content, $file = null)
         $document->loadXML($content);
 
         if (null !== $targetLanguage = $this->getTargetLanguageFromFile($document)) {
-            $expectedFileExtension = sprintf('%s.xlf', str_replace('-', '_', $targetLanguage));
-            $realFileExtension = explode('.', basename($file), 2)[1] ?? '';
+            $normalizedLocale = preg_quote(str_replace('-', '_', $targetLanguage), '/');
+            // strict file names require translation files to be named '____.locale.xlf'
+            // otherwise, both '____.locale.xlf' and 'locale.____.xlf' are allowed
+            $expectedFilenamePattern = $this->requireStrictFileNames ? sprintf('/^.*\.%s\.xlf/', $normalizedLocale) : sprintf('/^(.*\.%s\.xlf|%s\..*\.xlf)/', $normalizedLocale, $normalizedLocale);
 
-            if ($expectedFileExtension !== $realFileExtension) {
+            if (0 === preg_match($expectedFilenamePattern, basename($file))) {
                 $errors[] = array(
                     'line' => -1,
                     'column' => -1,
-                    'message' => sprintf('There is a mismatch between the file extension ("%s") and the "%s" value used in the "target-language" attribute of the file.', $realFileExtension, $targetLanguage),
+                    'message' => sprintf('There is a mismatch between the language included in the file name ("%s") and the "%s" value used in the "target-language" attribute of the file.', basename($file), $targetLanguage),
                 );
             }
         }

src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php

@@ -40,6 +40,23 @@ public function testLintCorrectFile()
         $this->assertContains('OK', trim($tester->getDisplay()));
     }
 
+    /**
+     * @dataProvider provideStrictFilenames
+     */
+    public function testStrictFilenames($requireStrictFileNames, $fileNamePattern, $targetLanguage, $mustFail)
+    {
+        $tester = $this->createCommandTester($requireStrictFileNames);
+        $filename = $this->createFile('note', $targetLanguage, $fileNamePattern);
+
+        $tester->execute(
+            array('filename' => $filename),
+            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+        );
+
+        $this->assertEquals($mustFail ? 1 : 0, $tester->getStatusCode());
+        $this->assertContains($mustFail ? '[WARNING] 0 XLIFF files have valid syntax and 1 contain errors.' : '[OK] All 1 XLIFF files contain valid syntax.', $tester->getDisplay());
+    }
+
     public function testLintIncorrectXmlSyntax()
     {
         $tester = $this->createCommandTester();
@@ -59,7 +76,7 @@ public function testLintIncorrectTargetLanguage()
         $tester->execute(array('filename' => $filename), array('decorated' => false));
 
         $this->assertEquals(1, $tester->getStatusCode(), 'Returns 1 in case of error');
-        $this->assertContains('There is a mismatch between the file extension ("en.xlf") and the "es" value used in the "target-language" attribute of the file.', trim($tester->getDisplay()));
+        $this->assertContains('There is a mismatch between the language included in the file name ("messages.en.xlf") and the "es" value used in the "target-language" attribute of the file.', trim($tester->getDisplay()));
     }
 
     /**
@@ -102,7 +119,7 @@ public function testGetHelp()
     /**
      * @return string Path to the new file
      */
-    private function createFile($sourceContent = 'note', $targetLanguage = 'en')
+    private function createFile($sourceContent = 'note', $targetLanguage = 'en', $fileNamePattern = 'messages.%locale%.xlf')
     {
         $xliffContent = <<<XLIFF
 <?xml version="1.0"?>
@@ -118,7 +135,7 @@ private function createFile($sourceContent = 'note', $targetLanguage = 'en')
 </xliff>
 XLIFF;
 
-        $filename = sprintf('%s/translation-xliff-lint-test/messages.en.xlf', sys_get_temp_dir());
+        $filename = sprintf('%s/translation-xliff-lint-test/%s', sys_get_temp_dir(), str_replace('%locale%', 'en', $fileNamePattern));
         file_put_contents($filename, $xliffContent);
 
         $this->files[] = $filename;
@@ -129,11 +146,11 @@ private function createFile($sourceContent = 'note', $targetLanguage = 'en')
     /**
      * @return CommandTester
      */
-    private function createCommandTester($application = null)
+    private function createCommandTester($requireStrictFileNames = true, $application = null)
     {
         if (!$application) {
             $application = new Application();
-            $application->add(new XliffLintCommand());
+            $application->add(new XliffLintCommand(null, null, null, $requireStrictFileNames));
         }
 
         $command = $application->find('lint:xliff');
@@ -160,4 +177,16 @@ protected function tearDown()
         }
         rmdir(sys_get_temp_dir().'/translation-xliff-lint-test');
     }
+
+    public function provideStrictFilenames()
+    {
+        yield array(false, 'messages.%locale%.xlf', 'en', false);
+        yield array(false, 'messages.%locale%.xlf', 'es', true);
+        yield array(false, '%locale%.messages.xlf', 'en', false);
+        yield array(false, '%locale%.messages.xlf', 'es', true);
+        yield array(true, 'messages.%locale%.xlf', 'en', false);
+        yield array(true, 'messages.%locale%.xlf', 'es', true);
+        yield array(true, '%locale%.messages.xlf', 'en', true);
+        yield array(true, '%locale%.messages.xlf', 'es', true);
+    }
 }