Use PHP_CodeSniffer as a formatter

composer.json

@@ -27,7 +27,8 @@
         "nikic/php-parser": "^3.0.0beta1",
         "phpdocumentor/reflection-docblock": "^3.0",
         "sabre/event": "^4.0",
-        "felixfbecker/advanced-json-rpc": "^1.2"
+        "felixfbecker/advanced-json-rpc": "^1.2",
+        "squizlabs/php_codesniffer" : "^2.7"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,

fixtures/format.php

@@ -2,7 +2,7 @@
 
 namespace TestNamespace;
 
-
+use     SomeNamespace\Goo;
 
 
 class       TestClass

fixtures/format_expected.php

@@ -2,12 +2,16 @@
 
 namespace TestNamespace;
 
+use SomeNamespace\Goo;
+
 class TestClass
 {
     public $testProperty;
+
     public function testMethod($testParameter)
     {
         $testVariable = 123;
+        
         if (empty($testParameter)) {
             echo 'Empty';
         }

src/Formatter.php

@@ -0,0 +1,63 @@
+<?php
+namespace LanguageServer;
+
+use LanguageServer\Protocol\{TextEdit, Range, Position, ErrorCode};
+use AdvancedJsonRpc\ResponseError;
+
+class Formatter
+{
+
+    /**
+     *
+     * @param string $content            
+     * @param string $uri            
+     *
+     * @return \LanguageServer\Protocol\TextEdit[]
+     * @throws \AdvancedJsonRpc\ResponseError
+     */
+    public function format(string $content, string $uri)
+    {
+        $path = uriToPath($uri);
+        $cs = new \PHP_CodeSniffer();
+        $cs->initStandard($this->findConfiguration($path));
+        $file = $cs->processFile(null, $content);
+        $fixed = $file->fixer->fixFile();
+        if (!$fixed && $file->getErrorCount() > 0) {
+            throw new ResponseError('Unable to format file', ErrorCode::INTERNAL_ERROR);
+        }
+        
+        $new = $file->fixer->getContents();
+        if ($content === $new) {
+            return [];
+        }
+        return [new TextEdit(new Range(new Position(0, 0), new Position(PHP_INT_MAX, PHP_INT_MAX)), $new)];
+    }
+
+    /**
+     *
+     * @param string $uri            
+     * @return string[]
+     */
+    private function findConfiguration(string $uri)
+    {
+        $currentDir = dirname($uri);
+        do {
+            $default = $currentDir . DIRECTORY_SEPARATOR . 'phpcs.xml';
+            if (is_file($default) === true) {
+                return array($default);
+            }
+            
+            $default = $currentDir . DIRECTORY_SEPARATOR . 'phpcs.xml.dist';
+            if (is_file($default) === true) {
+                return array($default);
+            }
+            
+            $lastDir = $currentDir;
+            $currentDir = dirname($currentDir);
+        } while ($currentDir !== '.' && $currentDir !== $lastDir);
+        
+        $standard = \PHP_CodeSniffer::getConfigData('default_standard') ?? 'PSR2';
+        return explode(',', $standard);
+    }
+    
+}

src/PhpDocument.php

@@ -224,14 +224,11 @@ class PhpDocument
      */
     public function getFormattedText()
     {
-        if (empty($this->stmts)) {
+        if (empty($this->getContent())) {
             return [];
         }
-        $prettyPrinter = new PrettyPrinter();
+        $formatter = new Formatter();
-        $edit = new TextEdit();
+        return $formatter->format($this->getContent(), $this->getUri());
-        $edit->range = new Range(new Position(0, 0), new Position(PHP_INT_MAX, PHP_INT_MAX));
-        $edit->newText = $prettyPrinter->prettyPrintFile($this->stmts);
-        return [$edit];
     }
 
     /**

src/Protocol/TextEdit.php

@@ -22,4 +22,10 @@ class TextEdit
      * @var string
      */
     public $newText;
+
+    public function __construct(Range $range = null, string $newText)
+    {
+        $this->range = $range;
+        $this->newText = $newText;
+    }
 }

src/utils.php

@@ -32,3 +32,19 @@ function pathToUri(string $filepath): string {
     $filepath = implode('/', array_map('urlencode', explode('/', $filepath)));
     return 'file:///' . $filepath;
 }
+
+/**
+ * Transforms URI into file path
+ * 
+ * @param string $uri
+ * @return string
+ */
+function uriToPath(string $uri)
+{
+    $position = strpos($uri, '://');
+    if (! $position) {
+        return $uri;
+    }
+    $path = substr($uri, $position + 3);
+    return strpos($path, ':') ? str_replace('/', "\\", substr($path, 1)) : $path;
+}

tests/FormatterTest.php

@@ -0,0 +1,32 @@
+<?php
+declare(strict_types = 1);
+
+namespace LanguageServer\Tests\Server;
+
+use PHPUnit\Framework\TestCase;
+use LanguageServer\Formatter;
+
+class FormatterTest extends TestCase
+{
+
+    public function testFormat()
+    {
+        $formatter = new Formatter();
+        
+        $input = file_get_contents(__DIR__ . '/../fixtures/format.php');
+        $output = file_get_contents(__DIR__ . '/../fixtures/format_expected.php');
+        
+        $edits = $formatter->format($input, "whatever");
+        $this->assertTrue($edits[0]->newText === $output);
+    }
+
+    public function testFormatNoChange()
+    {
+        $formatter = new Formatter();
+        $expected = file_get_contents(__DIR__ . '/../fixtures/format_expected.php');
+        
+        $edits = $formatter->format($expected, "whatever");
+        $this->assertTrue($edits == []);
+    }
+
+}

tests/Server/TextDocument/FormattingTest.php

@@ -22,7 +22,7 @@ class FormattingTest extends TestCase
         $this->textDocument = new Server\TextDocument($project, $client);
     }
 
-    public function test()
+    public function testFormatting()
     {
         $client =  new LanguageClient(new MockProtocolStream());
         $project = new Project($client);
@@ -54,4 +54,14 @@ class FormattingTest extends TestCase
             'newText' => $expected
         ]], json_decode(json_encode($result), true));
     }
+
+    public function testFormattingInvalidUri()
+    {
+        $client =  new LanguageClient(new MockProtocolStream());
+        $project = new Project($client);
+        $textDocument = new Server\TextDocument($project, $client);
+
+        $result = $textDocument->formatting(new TextDocumentIdentifier('whatever'), new FormattingOptions());
+        $this->assertEquals([], json_decode(json_encode($result), true));
+    }
 }

tests/Utils/FileUriTest.php

@@ -33,4 +33,25 @@ class FileUriTest extends TestCase
         $uri = \LanguageServer\pathToUri('c:\\foo\\bar.baz');
         $this->assertEquals('file:///c%3A/foo/bar.baz', $uri);
     }
+    
+    public function testUriToPathUnix()
+    {
+        $uri = "file:///home/foo/bar/Test.php";
+        $this->assertEquals("/home/foo/bar/Test.php", \LanguageServer\uriToPath($uri));
+    
+        $uri = "/home/foo/bar/Test.php";
+        $this->assertEquals("/home/foo/bar/Test.php", \LanguageServer\uriToPath($uri));
+    
+        $uri = "/home/foo space/bar/Test.php";
+        $this->assertEquals("/home/foo space/bar/Test.php", \LanguageServer\uriToPath($uri));
+    }
+    
+    public function testUriToPathWindows()
+    {  
+        $uri = "file:///c:/home/foo/bar/Test.php";
+        $this->assertEquals("c:\\home\\foo\\bar\\Test.php", \LanguageServer\uriToPath($uri));
+    
+        $uri = "c:\\home\\foo\\bar\\Test.php";
+        $this->assertEquals("c:\\home\\foo\\bar\\Test.php", \LanguageServer\uriToPath($uri));
+    }
 }