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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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class MWP_Stream_Callable implements MWP_Stream_Interface |
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{ |
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|
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/** @var callable */ |
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private $source; |
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|
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/** @var int */ |
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private $tellPos = 0; |
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|
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/** @var MWP_Stream_Buffer */ |
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private $buffer; |
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|
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/** @var array */ |
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private $arguments; |
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|
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/** |
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* @param callable $source Source of the stream data. The callable MAY |
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* accept an integer argument used to control the |
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* amount of data to return. The callable MUST |
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* return a string when called, or false on error |
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* or EOF. |
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* @param array $arguments |
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*/ |
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public function __construct($source, array $arguments = array()) |
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{ |
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$this->source = $source; |
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$this->buffer = new MWP_Stream_Buffer(); |
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$this->arguments = $arguments; |
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} |
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|
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public function close() |
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{ |
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$this->tellPos = false; |
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$this->source = null; |
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$this->arguments = array(); |
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} |
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|
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public function tell() |
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{ |
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return $this->tellPos; |
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} |
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|
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public function eof() |
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{ |
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if ($this->source !== null) { |
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return false; |
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} |
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|
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if ($this->source === null && $this->buffer !== null) { |
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return $this->buffer->eof(); |
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} |
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|
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return true; |
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} |
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|
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public function isSeekable() |
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{ |
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return false; |
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} |
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|
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public function seek($offset, $whence = SEEK_SET) |
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{ |
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return false; |
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} |
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|
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public function read($length) |
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{ |
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$data = $this->buffer->read($length); |
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$readLen = strlen($data); |
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$this->tellPos += $readLen; |
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$remaining = $length - $readLen; |
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|
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if ($remaining) { |
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$this->pump($remaining); |
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$data .= $this->buffer->read($remaining); |
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$this->tellPos += strlen($data) - $readLen; |
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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 $buffer; |
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} |
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|
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private function pump($length) |
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{ |
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if ($this->source) { |
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do { |
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$data = call_user_func_array($this->source, array_merge(array($length), $this->arguments)); |
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if ($data === false || $data === null) { |
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$this->source = null; |
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|
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return; |
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} |
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if ($data instanceof MWP_Stream_Interface) { |
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$this->source = null; |
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$this->buffer = $data; |
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|
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return; |
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} |
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$this->buffer->write($data); |
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$length -= strlen($data); |
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} while ($length > 0); |
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} |
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} |
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} |
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|
