move json parsing instructions into single class object

bin/composer

@@ -13,7 +13,9 @@ use Composer\Console\Application as ComposerApplication;
 
 // initialize repository manager
 $rm = new Repository\RepositoryManager();
-$rm->setLocalRepository(new Repository\PlatformRepository(new Repository\FilesystemRepository('.composer/installed.json')));
+$rm->setLocalRepository(new Repository\PlatformRepository(
+    new Repository\FilesystemRepository(new JsonFile('.composer/installed.json'))
+));
 $rm->setRepository('Packagist', new Repository\ComposerRepository('http://packagist.org'));
 
 // initialize download manager
@@ -28,7 +30,7 @@ $im->setInstaller('library', new Installer\LibraryInstaller('vendor', $dm, $rm->
 
 // load package
 $loader  = new Package\Loader\JsonLoader();
-$package = $loader->load('composer.json');
+$package = $loader->load(new JsonFile('composer.json'));
 
 
 // init locker

src/Composer/Json/JsonFile.php

@@ -53,8 +53,31 @@ class JsonFile
     public function read()
     {
         $json = file_get_contents($this->path);
-        $config = json_decode($json, true);
+
-        if (!$config) {
+        return static::parseJson($json);
+    }
+
+    /**
+     * Writes json file.
+     *
+     * @param   array   $hash   writes hash into json file
+     */
+    public function write(array $hash)
+    {
+        file_put_contents($this->path, json_encode($hash));
+    }
+
+    /**
+     * Parses json string and returns hash.
+     *
+     * @param   string  $json   json string
+     *
+     * @return  array
+     */
+    public static function parseJson($json)
+    {
+        $hash = json_decode($json, true);
+        if (!$hash) {
             switch (json_last_error()) {
             case JSON_ERROR_NONE:
                 $msg = 'No error has occurred, is your composer.json file empty?';
@@ -78,16 +101,6 @@ class JsonFile
             throw new \UnexpectedValueException('Incorrect composer.json file: '.$msg);
         }
 
-        return $config;
+        return $hash;
-    }
-
-    /**
-     * Writes json file.
-     *
-     * @param   array   $hash   writes hash into json file
-     */
-    public function write(array $hash)
-    {
-        file_put_contents($this->path, json_encode($hash));
     }
 }

src/Composer/Package/Loader/JsonLoader.php

@@ -12,6 +12,8 @@
 
 namespace Composer\Package\Loader;
 
+use Composer\Json\JsonFile;
+
 /**
  * @author Konstantin Kudryashiv <ever.zet@gmail.com>
  */
@@ -19,42 +21,12 @@ class JsonLoader extends ArrayLoader
 {
     public function load($json)
     {
-        $config = $this->loadJsonConfig($json);
+        if ($json instanceof JsonFile) {
+            $json = $json->read();
+        } elseif (is_string($json)) {
+            $json = JsonFile::parseJson($json);
+        }
 
         return parent::load($config);
     }
-
-    private function loadJsonConfig($json)
-    {
-        if (is_file($json)) {
-            $json = file_get_contents($json);
-        }
-
-        $config = json_decode($json, true);
-        if (!$config) {
-            switch (json_last_error()) {
-            case JSON_ERROR_NONE:
-                $msg = 'No error has occurred, is your composer.json file empty?';
-                break;
-            case JSON_ERROR_DEPTH:
-                $msg = 'The maximum stack depth has been exceeded';
-                break;
-            case JSON_ERROR_STATE_MISMATCH:
-                $msg = 'Invalid or malformed JSON';
-                break;
-            case JSON_ERROR_CTRL_CHAR:
-                $msg = 'Control character error, possibly incorrectly encoded';
-                break;
-            case JSON_ERROR_SYNTAX:
-                $msg = 'Syntax error';
-                break;
-            case JSON_ERROR_UTF8:
-                $msg = 'Malformed UTF-8 characters, possibly incorrectly encoded';
-                break;
-            }
-            throw new \UnexpectedValueException('Incorrect composer.json file: '.$msg);
-        }
-
-        return $config;
-    }
 }

src/Composer/Repository/ComposerRepository.php

@@ -14,6 +14,7 @@ namespace Composer\Repository;
 
 use Composer\Package\Loader\ArrayLoader;
 use Composer\Package\LinkConstraint\VersionConstraint;
+use Composer\Json\JsonFile;
 
 /**
  * @author Jordi Boggiano <j.boggiano@seld.be>
@@ -36,7 +37,8 @@ class ComposerRepository extends ArrayRepository
     protected function initialize()
     {
         parent::initialize();
-        $packages = @json_decode(file_get_contents($this->url.'/packages.json'), true);
+        $json     = new JsonFile($this->url.'/packages.json');
+        $packages = $json->read();
         if (!$packages) {
             throw new \UnexpectedValueException('Could not parse package list from the '.$this->url.' repository');
         }

src/Composer/Repository/FilesystemRepository.php

@@ -12,6 +12,7 @@
 
 namespace Composer\Repository;
 
+use Composer\Json\JsonFile;
 use Composer\Package\PackageInterface;
 use Composer\Package\Loader\ArrayLoader;
 use Composer\Package\Dumper\ArrayDumper;
@@ -28,25 +29,11 @@ class FilesystemRepository extends ArrayRepository implements WritableRepository
     /**
      * Initializes filesystem repository.
      *
-     * @param   string  $group  registry (installer) group
+     * @param   JsonFile    $repositoryFile repository json file
      */
-    public function __construct($repositoryFile)
+    public function __construct(JsonFile $repositoryFile)
     {
         $this->file = $repositoryFile;
-        $path       = dirname($this->file);
-
-        if (!is_dir($path)) {
-            if (file_exists($path)) {
-                throw new \UnexpectedValueException(
-                    $path.' exists and is not a directory.'
-                );
-            }
-            if (!mkdir($path, 0777, true)) {
-                throw new \UnexpectedValueException(
-                    $path.' does not exist and could not be created.'
-                );
-            }
-        }
     }
 
     /**
@@ -56,8 +43,7 @@ class FilesystemRepository extends ArrayRepository implements WritableRepository
     {
         parent::initialize();
 
-        $packages = @json_decode(file_get_contents($this->file), true);
+        $packages = $this->file->read();
-
         if (is_array($packages)) {
             $loader = new ArrayLoader();
             foreach ($packages as $package) {
@@ -77,6 +63,6 @@ class FilesystemRepository extends ArrayRepository implements WritableRepository
             $packages[] = $dumper->dump($package);
         }
 
-        file_put_contents($this->file, json_encode($packages));
+        $this->file->write($packages);
     }
 }

src/Composer/Repository/GitRepository.php

@@ -16,6 +16,7 @@ use Composer\Package\MemoryPackage;
 use Composer\Package\BasePackage;
 use Composer\Package\Link;
 use Composer\Package\LinkConstraint\VersionConstraint;
+use Composer\Json\JsonFile;
 
 /**
  * FIXME This is majorly broken and incomplete, it was an experiment
@@ -45,7 +46,8 @@ class GitRepository extends ArrayRepository
             if (!file_exists($this->url.'/composer.json')) {
                 throw new \InvalidArgumentException('The repository at url '.$this->url.' does not contain a composer.json file.');
             }
-            $config = json_decode(file_get_contents($this->url.'/composer.json'), true);
+            $json   = new JsonFile($this->url.'/composer.json');
+            $fonfig = $json->read();
             if (!$config) {
                 throw new \UnexpectedValueException('Config file could not be parsed: '.$this->url.'/composer.json. Probably a JSON syntax error.');
             }

tests/Composer/Test/Repository/FilesystemRepositoryTest.php

@@ -13,43 +13,56 @@
 namespace Composer\Repository;
 
 use Composer\Repository\FilesystemRepository;
+use Composer\Package\MemoryPackage;
 
 class FilesystemRepositoryTest extends \PHPUnit_Framework_TestCase
 {
-    private $dir;
+    public function testRepositoryRead()
-    private $repositoryFile;
-
-    protected function setUp()
     {
-        $this->dir = sys_get_temp_dir().'/.composer';
+        $json = $this->createJsonFileMock();
-        $this->repositoryFile = $this->dir.'/some_registry-reg.json';
 
-        if (file_exists($this->repositoryFile)) {
+        $repository = new FilesystemRepository($json);
-            unlink($this->repositoryFile);
-        }
-    }
 
-    public function testRepositoryReadWrite()
+        $json
-    {
+            ->expects($this->once())
-        $this->assertFileNotExists($this->repositoryFile);
+            ->method('read')
-        $repository = new FilesystemRepository($this->repositoryFile);
+            ->will($this->returnValue(array(
-
-        $repository->getPackages();
-        $repository->write();
-        $this->assertFileExists($this->repositoryFile);
-
-        file_put_contents($this->repositoryFile, json_encode(array(
                 array('name' => 'package1', 'version' => '1.0.0-beta', 'type' => 'vendor')
             )));
 
-        $repository = new FilesystemRepository($this->repositoryFile);
+        $packages = $repository->getPackages();
-        $repository->getPackages();
-        $repository->write();
-        $this->assertFileExists($this->repositoryFile);
 
-        $data = json_decode(file_get_contents($this->repositoryFile), true);
+        $this->assertSame(1, count($packages));
-        $this->assertEquals(array(
+        $this->assertSame('package1', $packages[0]->getName());
-            array('name' => 'package1', 'type' => 'vendor', 'version' => '1.0.0.0-beta', 'names' => array('package1'))
+        $this->assertSame('1.0.0.0-beta', $packages[0]->getVersion());
-        ), $data);
+        $this->assertSame('vendor', $packages[0]->getType());
+    }
+
+    public function testRepositoryWrite()
+    {
+        $json = $this->createJsonFileMock();
+
+        $repository = new FilesystemRepository($json);
+
+        $json
+            ->expects($this->once())
+            ->method('read')
+            ->will($this->returnValue(array()));
+        $json
+            ->expects($this->once())
+            ->method('write')
+            ->with(array(
+                array('name' => 'mypkg', 'type' => 'library', 'names' => array('mypkg'), 'version' => '0.1.10')
+            ));
+
+        $repository->addPackage(new MemoryPackage('mypkg', '0.1.10'));
+        $repository->write();
+    }
+
+    private function createJsonFileMock()
+    {
+        return $this->getMockBuilder('Composer\Json\JsonFile')
+            ->disableOriginalConstructor()
+            ->getMock();
     }
 }