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<?php |
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/* |
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* This file is part of the ManageWP Worker plugin. |
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* |
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* (c) ManageWP LLC <contact@managewp.com> |
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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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|
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/** |
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* Lazily open file stream for reading and close it when EOF is reached. |
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*/ |
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class MWP_Stream_LazyFile implements MWP_Stream_Interface |
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{ |
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|
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/** |
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* @var MWP_Stream_Interface |
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*/ |
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private $stream = null; |
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|
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/** |
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* @var mixed |
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*/ |
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private $realPath; |
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|
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/** |
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* @var bool |
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*/ |
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private $initialized = false; |
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|
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public function __construct($realPath) |
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{ |
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$this->realPath = $realPath; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function close() |
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{ |
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if ($this->stream !== null) { |
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$this->stream->close(); |
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} |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function tell() |
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{ |
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if (!$this->initialized) { |
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return 0; |
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} |
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|
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return $this->stream !== null ? $this->stream->tell() : false; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function isSeekable() |
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{ |
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$this->initialize(); |
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|
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return $this->stream !== null ? $this->stream->isSeekable() : false; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function seek($offset, $whence = SEEK_SET) |
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{ |
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$this->initialize(); |
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|
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return $this->stream !== null ? $this->stream->seek($offset, $whence) : false; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function eof() |
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{ |
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$this->initialize(); |
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|
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return $this->stream !== null ? $this->stream->eof() : true; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function read($length) |
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{ |
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$this->initialize(); |
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|
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if ($this->stream === null) { |
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return null; |
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} |
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|
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$data = $this->stream->read($length); |
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|
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if ($this->eof()) { |
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$this->close(); |
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} |
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|
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return $data; |
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} |
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|
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public function __toString() |
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{ |
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$buffer = ''; |
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|
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while (!$this->eof()) { |
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$buffer .= $this->read(1048576); |
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} |
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|
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return $buffer; |
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} |
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|
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private function initialize() |
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{ |
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if ($this->initialized === false) { |
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if (file_exists($this->realPath)) { |
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$handle = @fopen($this->realPath, "rb"); |
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if ($handle !== false) { |
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$this->stream = MWP_Stream_Stream::factory($handle); |
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} |
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} |
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$this->initialized = true; |
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} |
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} |
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} |
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|
