Passed
Pull Request — master (#63)
by Eugene
03:45
created

PurePacker::fromExtensions()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 7
Code Lines 4

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 5
CRAP Score 1.0046

Importance

Changes 0
Metric Value
cc 1
eloc 4
c 0
b 0
f 0
nc 1
nop 2
dl 0
loc 7
rs 10
ccs 5
cts 6
cp 0.8333
crap 1.0046
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<?php
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/**
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 * This file is part of the Tarantool Client package.
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 *
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 * (c) Eugene Leonovich <[email protected]>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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declare(strict_types=1);
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namespace Tarantool\Client\Packer;
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use MessagePack\BufferUnpacker;
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use MessagePack\Packer;
0 ignored issues
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Bug introduced by
This use statement conflicts with another class in this namespace, Tarantool\Client\Packer\Packer. Consider defining an alias.

Let?s assume that you have a directory layout like this:

.
|-- OtherDir
|   |-- Bar.php
|   `-- Foo.php
`-- SomeDir
    `-- Foo.php

and let?s assume the following content of Bar.php:

// Bar.php
namespace OtherDir;

use SomeDir\Foo; // This now conflicts the class OtherDir\Foo

If both files OtherDir/Foo.php and SomeDir/Foo.php are loaded in the same runtime, you will see a PHP error such as the following:

PHP Fatal error:  Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php

However, as OtherDir/Foo.php does not necessarily have to be loaded and the error is only triggered if it is loaded before OtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias:

// Bar.php
namespace OtherDir;

use SomeDir\Foo as SomeDirFoo; // There is no conflict anymore.
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use MessagePack\TypeTransformer\Extension;
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use Tarantool\Client\Keys;
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use Tarantool\Client\Packer\Packer as ClientPacker;
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use Tarantool\Client\Request\Request;
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use Tarantool\Client\Response;
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final class PurePacker implements ClientPacker
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{
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    private $packer;
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    private $unpacker;
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    public function __construct(?Packer $packer = null, ?BufferUnpacker $unpacker = null)
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    {
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        $this->packer = $packer ?: new Packer();
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        $this->unpacker = $unpacker ?: new BufferUnpacker();
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    }
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    public static function fromExtensions(Extension $extension, Extension ...$extensions) : self
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    {
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        $extensions = [-1 => $extension] + $extensions;
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        return new self(
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            new Packer(null, $extensions),
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            new BufferUnpacker('', null, $extensions)
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        );
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    }
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    public function pack(Request $request, int $sync) : string
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    {
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        $packet = $this->packer->packMapHeader(2).
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            $this->packer->packInt(Keys::CODE).
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            $this->packer->packInt($request->getType()).
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            $this->packer->packInt(Keys::SYNC).
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            $this->packer->packInt($sync).
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            $this->packer->packMap($request->getBody());
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        return PacketLength::pack(\strlen($packet)).$packet;
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    }
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    public function unpack(string $packet) : Response
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    {
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        $this->unpacker->reset($packet);
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        return new Response(
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            $this->unpacker->unpackMap(),
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            $this->unpacker->unpackMap()
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        );
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    }
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}
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