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<?php declare(strict_types=1); |
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namespace DaveRandom\LibLifxLan\Decoding; |
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use DaveRandom\LibLifxLan\Header\Frame; |
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use DaveRandom\LibLifxLan\Header\FrameAddress; |
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use DaveRandom\LibLifxLan\Header\Header; |
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use DaveRandom\LibLifxLan\Header\ProtocolHeader; |
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final class HeaderDecoder |
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{ |
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private const FRAME_OFFSET = 0; |
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private const FRAME_ADDRESS_OFFSET = self::FRAME_OFFSET + Frame::WIRE_SIZE; |
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private const PROTOCOL_HEADER_OFFSET = self::FRAME_ADDRESS_OFFSET + FrameAddress::WIRE_SIZE; |
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private $frameDecoder; |
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private $frameAddressDecoder; |
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private $protocolHeaderDecoder; |
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public function __construct(FrameDecoder $frameDecoder = null, FrameAddressDecoder $frameAddressDecoder = null, ProtocolHeaderDecoder $protocolHeaderDecoder = null) |
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{ |
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$this->frameDecoder = $frameDecoder ?? new FrameDecoder; |
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$this->frameAddressDecoder = $frameAddressDecoder ?? new FrameAddressDecoder; |
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$this->protocolHeaderDecoder = $protocolHeaderDecoder ?? new ProtocolHeaderDecoder; |
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} |
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public function decodeHeader(string $data): Header |
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{ |
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\assert( |
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\strlen($data) === Header::WIRE_SIZE, |
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new \Error("Header data length expected to be " . Header::WIRE_SIZE . " bytes, got " . \strlen($data) . " bytes") |
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); |
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$frame = $this->frameDecoder->decodeFrame(\substr($data, self::FRAME_OFFSET, Frame::WIRE_SIZE)); |
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$frameAddress = $this->frameAddressDecoder->decodeFrameAddress(\substr($data, self::FRAME_ADDRESS_OFFSET, FrameAddress::WIRE_SIZE)); |
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$protocolHeader = $this->protocolHeaderDecoder->decodeProtocolHeader(\substr($data, self::PROTOCOL_HEADER_OFFSET, ProtocolHeader::WIRE_SIZE)); |
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return new Header($frame, $frameAddress, $protocolHeader); |
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} |
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} |
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DaveRandom /
LibLifxLan
