PHPLIB-232: Support typeMap option on GridFS Bucket

docs/includes/apiargs-MongoDBDatabase-method-selectGridFSBucket-option.yaml

@@ -31,6 +31,12 @@ replacement:
   resource: "bucket"
   parent: "database"
 ---
+source:
+  file: apiargs-common-option.yaml
+  ref: typeMap
+replacement:
+  parent: "database"
+---
 source:
   file: apiargs-common-option.yaml
   ref: writeConcern

docs/includes/apiargs-MongoDBGridFSBucket-method-construct-option.yaml

@@ -31,6 +31,10 @@ replacement:
   resource: "bucket"
   parent: "database"
 ---
+source:
+  file: apiargs-MongoDBClient-method-construct-driverOptions.yaml
+  ref: typeMap
+---
 source:
   file: apiargs-common-option.yaml
   ref: writeConcern

docs/reference/method/MongoDBDatabase-selectGridFSBucket.txt

@@ -42,8 +42,8 @@ Errors/Exceptions
 Behavior
 --------
 
-The selected bucket inherits options such as read preference and write concern
-from the :phpclass:`Database <MongoDB\\Database>` object. Options may be
+The selected bucket inherits options such as read preference and type
+mapping from the :phpclass:`Database <MongoDB\\Database>` object. Options may be
 overridden via the ``$options`` parameter.
 
 Example

docs/reference/method/MongoDBGridFSBucket-getFileDocumentForStream.txt

@@ -19,7 +19,7 @@ Definition
 
    .. code-block:: php
 
-      function getFileDocumentForStream($stream): object
+      function getFileDocumentForStream($stream): array|object
 
    This method has the following parameters:
 
@@ -28,7 +28,8 @@ Definition
 Return Values
 -------------
 
-The metadata document associated with the GridFS stream.
+The metadata document associated with the GridFS stream. The return type will
+depend on the bucket's ``typeMap`` option.
 
 .. todo: add examples
 

docs/reference/method/MongoDBGridFSBucket-getFileIdForStream.txt

@@ -28,8 +28,8 @@ Definition
 Return Values
 -------------
 
-The ``_id`` field of the metadata document associated with the GridFS
-stream.
+The ``_id`` field of the metadata document associated with the GridFS stream.
+The return type will depend on the bucket's ``typeMap`` option.
 
 .. todo: add examples
 

src/Database.php

@@ -317,6 +317,7 @@ class Database
         $options += [
             'readConcern' => $this->readConcern,
             'readPreference' => $this->readPreference,
+            'typeMap' => $this->typeMap,
             'writeConcern' => $this->writeConcern,
         ];
 

src/GridFS/Bucket.php

@@ -23,6 +23,11 @@ class Bucket
 {
     private static $defaultBucketName = 'fs';
     private static $defaultChunkSizeBytes = 261120;
+    private static $defaultTypeMap = [
+        'array' => 'MongoDB\Model\BSONArray',
+        'document' => 'MongoDB\Model\BSONDocument',
+        'root' => 'MongoDB\Model\BSONDocument',
+    ];
     private static $streamWrapperProtocol = 'gridfs';
 
     private $collectionWrapper;
@@ -32,6 +37,7 @@ class Bucket
     private $chunkSizeBytes;
     private $readConcern;
     private $readPreference;
+    private $typeMap;
     private $writeConcern;
 
     /**
@@ -49,6 +55,8 @@ class Bucket
      *
      *  * readPreference (MongoDB\Driver\ReadPreference): Read preference.
      *
+     *  * typeMap (array): Default type map for cursors and BSON documents.
+     *
      *  * writeConcern (MongoDB\Driver\WriteConcern): Write concern.
      *
      * @param Manager $manager      Manager instance from the driver
@@ -79,6 +87,10 @@ class Bucket
             throw InvalidArgumentException::invalidType('"readPreference" option', $options['readPreference'], 'MongoDB\Driver\ReadPreference');
         }
 
+        if (isset($options['typeMap']) && ! is_array($options['typeMap'])) {
+            throw InvalidArgumentException::invalidType('"typeMap" option', $options['typeMap'], 'array');
+        }
+
         if (isset($options['writeConcern']) && ! $options['writeConcern'] instanceof WriteConcern) {
             throw InvalidArgumentException::invalidType('"writeConcern" option', $options['writeConcern'], 'MongoDB\Driver\WriteConcern');
         }
@@ -89,9 +101,10 @@ class Bucket
         $this->chunkSizeBytes = $options['chunkSizeBytes'];
         $this->readConcern = isset($options['readConcern']) ? $options['readConcern'] : $this->manager->getReadConcern();
         $this->readPreference = isset($options['readPreference']) ? $options['readPreference'] : $this->manager->getReadPreference();
+        $this->typeMap = isset($options['typeMap']) ? $options['typeMap'] : self::$defaultTypeMap;
         $this->writeConcern = isset($options['writeConcern']) ? $options['writeConcern'] : $this->manager->getWriteConcern();
 
-        $collectionOptions = array_intersect_key($options, ['readConcern' => 1, 'readPreference' => 1, 'writeConcern' => 1]);
+        $collectionOptions = array_intersect_key($options, ['readConcern' => 1, 'readPreference' => 1, 'typeMap' => 1, 'writeConcern' => 1]);
 
         $this->collectionWrapper = new CollectionWrapper($manager, $databaseName, $options['bucketName'], $collectionOptions);
         $this->registerStreamWrapper();
@@ -112,6 +125,7 @@ class Bucket
             'chunkSizeBytes' => $this->chunkSizeBytes,
             'readConcern' => $this->readConcern,
             'readPreference' => $this->readPreference,
+            'typeMap' => $this->typeMap,
             'writeConcern' => $this->writeConcern,
         ];
     }
@@ -233,22 +247,15 @@ class Bucket
      * Gets the file document of the GridFS file associated with a stream.
      *
      * @param resource $stream GridFS stream
-     * @return stdClass
+     * @return array|object
      * @throws InvalidArgumentException
      */
     public function getFileDocumentForStream($stream)
     {
-        if ( ! is_resource($stream) || get_resource_type($stream) != "stream") {
-            throw InvalidArgumentException::invalidType('$stream', $stream, 'resource');
-        }
+        $file = $this->getRawFileDocumentForStream($stream);
 
-        $metadata = stream_get_meta_data($stream);
-
-        if (!$metadata['wrapper_data'] instanceof StreamWrapper) {
-            throw InvalidArgumentException::invalidType('$stream wrapper data', $metadata['wrapper_data'], 'MongoDB\Driver\GridFS\StreamWrapper');
-        }
-
-        return $metadata['wrapper_data']->getFile();
+        // Filter the raw document through the specified type map
+        return \MongoDB\BSON\toPHP(\MongoDB\BSON\fromPHP($file), $this->typeMap);
     }
 
     /**
@@ -261,7 +268,13 @@ class Bucket
      */
     public function getFileIdForStream($stream)
     {
-        $file = $this->getFileDocumentForStream($stream);
+        $file = $this->getRawFileDocumentForStream($stream);
+
+        /* Filter the raw document through the specified type map, but override
+         * the root type so we can reliably access the ID.
+         */
+        $typeMap = ['root' => 'stdClass'] + $this->typeMap;
+        $file = \MongoDB\BSON\toPHP(\MongoDB\BSON\fromPHP($file), $typeMap);
 
         if ( ! isset($file->_id) && ! property_exists($file, '_id')) {
             throw new CorruptFileException('file._id does not exist');
@@ -466,6 +479,31 @@ class Bucket
         return sprintf('%s.%s.files', $this->databaseName, $this->bucketName);
     }
 
+    /**
+     * Gets the file document of the GridFS file associated with a stream.
+     *
+     * This returns the raw document from the StreamWrapper, which does not
+     * respect the Bucket's type map.
+     *
+     * @param resource $stream GridFS stream
+     * @return stdClass
+     * @throws InvalidArgumentException
+     */
+    private function getRawFileDocumentForStream($stream)
+    {
+        if ( ! is_resource($stream) || get_resource_type($stream) != "stream") {
+            throw InvalidArgumentException::invalidType('$stream', $stream, 'resource');
+        }
+
+        $metadata = stream_get_meta_data($stream);
+
+        if (!$metadata['wrapper_data'] instanceof StreamWrapper) {
+            throw InvalidArgumentException::invalidType('$stream wrapper data', $metadata['wrapper_data'], 'MongoDB\Driver\GridFS\StreamWrapper');
+        }
+
+        return $metadata['wrapper_data']->getFile();
+    }
+
     /**
      * Opens a readable stream for the GridFS file.
      *

src/GridFS/CollectionWrapper.php

@@ -68,8 +68,8 @@ class CollectionWrapper
      */
     public function dropCollections()
     {
-        $this->filesCollection->drop();
-        $this->chunksCollection->drop();
+        $this->filesCollection->drop(['typeMap' => []]);
+        $this->chunksCollection->drop(['typeMap' => []]);
     }
 
     /**
@@ -284,6 +284,7 @@ class CollectionWrapper
         return null === $this->filesCollection->findOne([], [
             'readPreference' => new ReadPreference(ReadPreference::RP_PRIMARY),
             'projection' => ['_id' => 1],
+            'typeMap' => [],
         ]);
     }
 }

tests/GridFS/BucketFunctionalTest.php

@@ -57,6 +57,10 @@ class BucketFunctionalTest extends FunctionalTestCase
             $options[][] = ['readPreference' => $value];
         }
 
+        foreach ($this->getInvalidArrayValues() as $value) {
+            $options[][] = ['typeMap' => $value];
+        }
+
         foreach ($this->getInvalidWriteConcernValues() as $value) {
             $options[][] = ['writeConcern' => $value];
         }
@@ -314,6 +318,16 @@ class BucketFunctionalTest extends FunctionalTestCase
         $this->assertSameDocuments($expected, $cursor);
     }
 
+    public function testFindUsesTypeMap()
+    {
+        $this->bucket->uploadFromStream('a', $this->createStream('foo'));
+
+        $cursor = $this->bucket->find();
+        $fileDocument = current($cursor->toArray());
+
+        $this->assertInstanceOf('MongoDB\Model\BSONDocument', $fileDocument);
+    }
+
     public function testGetBucketNameWithCustomValue()
     {
         $bucket = new Bucket($this->manager, $this->getDatabaseName(), ['bucketName' => 'custom_fs']);
@@ -331,6 +345,18 @@ class BucketFunctionalTest extends FunctionalTestCase
         $this->assertEquals($this->getDatabaseName(), $this->bucket->getDatabaseName());
     }
 
+    public function testGetFileDocumentForStreamUsesTypeMap()
+    {
+        $metadata = ['foo' => 'bar'];
+        $stream = $this->bucket->openUploadStream('filename', ['_id' => 1, 'metadata' => $metadata]);
+
+        $fileDocument = $this->bucket->getFileDocumentForStream($stream);
+
+        $this->assertInstanceOf('MongoDB\Model\BSONDocument', $fileDocument);
+        $this->assertInstanceOf('MongoDB\Model\BSONDocument', $fileDocument['metadata']);
+        $this->assertSame(['foo' => 'bar'], $fileDocument['metadata']->getArrayCopy());
+    }
+
     public function testGetFileDocumentForStreamWithReadableStream()
     {
         $metadata = ['foo' => 'bar'];
@@ -366,6 +392,16 @@ class BucketFunctionalTest extends FunctionalTestCase
         $this->bucket->getFileDocumentForStream($stream);
     }
 
+    public function testGetFileIdForStreamUsesTypeMap()
+    {
+        $stream = $this->bucket->openUploadStream('filename', ['_id' => ['x' => 1]]);
+
+        $id = $this->bucket->getFileIdForStream($stream);
+
+        $this->assertInstanceOf('MongoDB\Model\BSONDocument', $id);
+        $this->assertSame(['x' => 1], $id->getArrayCopy());
+    }
+
     public function testGetFileIdForStreamWithReadableStream()
     {
         $id = $this->bucket->uploadFromStream('filename', $this->createStream('foobar'));