61 lines
1.5 KiB
PHP
61 lines
1.5 KiB
PHP
<?php
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namespace Shaarli\Feed;
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/**
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* Simple cache system, mainly for the RSS/ATOM feeds
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*/
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class CachedPage
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{
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// Directory containing page caches
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private $cacheDir;
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// Should this URL be cached (boolean)?
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private $shouldBeCached;
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// Name of the cache file for this URL
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private $filename;
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/**
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* Creates a new CachedPage
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*
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* @param string $cacheDir page cache directory
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* @param string $url page URL
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* @param bool $shouldBeCached whether this page needs to be cached
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*/
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public function __construct($cacheDir, $url, $shouldBeCached)
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{
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// TODO: check write access to the cache directory
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$this->cacheDir = $cacheDir;
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$this->filename = $this->cacheDir . '/' . sha1($url) . '.cache';
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$this->shouldBeCached = $shouldBeCached;
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}
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/**
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* Returns the cached version of a page, if it exists and should be cached
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*
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* @return string a cached version of the page if it exists, null otherwise
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*/
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public function cachedVersion()
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{
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if (!$this->shouldBeCached) {
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return null;
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}
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if (is_file($this->filename)) {
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return file_get_contents($this->filename);
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}
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return null;
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}
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/**
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* Puts a page in the cache
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*
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* @param string $pageContent XML content to cache
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*/
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public function cache($pageContent)
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{
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if (!$this->shouldBeCached) {
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return;
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}
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file_put_contents($this->filename, $pageContent);
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}
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}
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