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+<?php
+/**
+ * SimplePie
+ *
+ * A PHP-Based RSS and Atom Feed Framework.
+ * Takes the hard work out of managing a complete RSS/Atom solution.
+ *
+ * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice, this list
+ * of conditions and the following disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * * Neither the name of the SimplePie Team nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
+ * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package SimplePie
+ * @copyright 2004-2022 Ryan Parman, Sam Sneddon, Ryan McCue
+ * @author Ryan Parman
+ * @author Sam Sneddon
+ * @author Ryan McCue
+ * @link http://simplepie.org/ SimplePie
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ */
+
+namespace SimplePie\Cache;
+
+/**
+ * Creating a cache filename with callables
+ *
+ * @package SimplePie
+ * @subpackage Caching
+ */
+final class CallableNameFilter implements NameFilter
+{
+ /**
+ * @var callable
+ */
+ private $callable;
+
+ public function __construct(callable $callable)
+ {
+ $this->callable = $callable;
+ }
+
+ /**
+ * Method to create cache filename with.
+ *
+ * The returning name MUST follow the rules for keys in PSR-16.
+ *
+ * @link https://www.php-fig.org/psr/psr-16/
+ *
+ * The returning name MUST be a string of at least one character
+ * that uniquely identifies a cached item, MUST only contain the
+ * characters A-Z, a-z, 0-9, _, and . in any order in UTF-8 encoding
+ * and MUST not longer then 64 characters. The following characters
+ * are reserved for future extensions and MUST NOT be used: {}()/\@:
+ *
+ * A provided implementing library MAY support additional characters
+ * and encodings or longer lengths, but MUST support at least that
+ * minimum.
+ *
+ * @param string $name The name for the cache will be most likly an url with query string
+ *
+ * @return string the new cache name
+ */
+ public function filter(string $name): string
+ {
+ return call_user_func($this->callable, $name);
+ }
+}