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<?php

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/**

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* SimplePie

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* A PHP-Based RSS and Atom Feed Framework.

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* Takes the hard work out of managing a complete RSS/Atom solution.

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* Redistribution and use in source and binary forms, with or without modification, are

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* permitted provided that the following conditions are met:

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* * Redistributions of source code must retain the above copyright notice, this list of

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* conditions and the following disclaimer.

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* * Redistributions in binary form must reproduce the above copyright notice, this list

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* of conditions and the following disclaimer in the documentation and/or other materials

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* provided with the distribution.

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* * Neither the name of the SimplePie Team nor the names of its contributors may be used

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* to endorse or promote products derived from this software without specific prior

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* written permission.

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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS

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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS

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* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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* POSSIBILITY OF SUCH DAMAGE.

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* @package SimplePie

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* @author Ryan Parman

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* @author Sam Sneddon

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* @author Ryan McCue

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* @link http://simplepie.org/ SimplePie

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* @license http://www.opensource.org/licenses/bsd-license.php BSD License

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/**

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* Caches data to the filesystem

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* @package SimplePie

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* @subpackage Caching

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class SimplePie_Cache_File implements SimplePie_Cache_Base

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{

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/**

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* Location string

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* @see SimplePie::$cache_location

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* @var string

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protected $location;

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/**

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* Filename

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* @var string

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protected $filename;

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/**

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* File extension

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* @var string

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protected $extension;

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/**

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* File path

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* @var string

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protected $name;

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/**

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* Create a new cache object

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* @param string $location Location string (from SimplePie::$cache_location)

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* @param string $name Unique ID for the cache

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* @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data

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public function __construct($location, $name, $type)

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{

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$this->location = $location;

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$this->filename = $name;

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$this->extension = $type;

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$this->name = "$this->location/$this->filename.$this->extension";

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}

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/**

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* Save data to the cache

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* @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property

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* @return bool Successfulness

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public function save($data)

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{

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if (file_exists($this->name) && is_writable($this->name) || file_exists($this->location) && is_writable($this->location))

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{

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if ($data instanceof SimplePie)

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{

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$data = $data->data;

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}

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$data = serialize($data);

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return (bool) file_put_contents($this->name, $data);

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}

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return false;

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}

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/**

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* Retrieve the data saved to the cache

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* @return array Data for SimplePie::$data

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public function load()

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{

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if (file_exists($this->name) && is_readable($this->name))

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{

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return unserialize(file_get_contents($this->name));

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}

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return false;

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}

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/**

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* Retrieve the last modified time for the cache

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* @return int Timestamp

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public function mtime()

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{

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return @filemtime($this->name);

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}

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/**

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* Set the last modified time to the current time

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* @return bool Success status

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public function touch()

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{

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return @touch($this->name);

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}

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/**

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* Remove the cache

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* @return bool Success status

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public function unlink()

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{

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if (file_exists($this->name))

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{

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return unlink($this->name);

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}

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return false;

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}

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}

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