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85 lines
3.1 KiB
PHP
85 lines
3.1 KiB
PHP
<?php
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namespace Jump;
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use Nette\Caching;
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/**
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* Defines caches to be used throughout the site and provides a wrapper around
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* the Nette\Caching library.
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*
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* @author Dale Davies <dale@daledavies.co.uk>
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* @license MIT
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*/
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class Cache {
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private Caching\Storages\FileStorage $storage;
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/**
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* The definition of various caches used throughout the application.
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*
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* @var array Multidimensional array
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*/
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private array $caches;
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private Config $config;
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/**
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* Creates file storage for cache and initialises cache objects for each
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* name/type specified in $caches definition.
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*/
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public function __construct(Config $config) {
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$this->config = $config;
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// Define the various caches used throughout the app.
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$this->caches = [
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'sites' => [
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'cache' => null,
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'expirationtype' => Caching\Cache::FILES,
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'expirationparams' => $config->get('sitesfile')
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],
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'templates/sites' => [
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'cache' => null,
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'expirationtype' => Caching\Cache::FILES,
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'expirationparams' => [
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__DIR__.'/../config.php',
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$config->get('sitesfile'),
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$config->get('templatedir').'/sites.mustache'
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]
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]
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];
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// Inititalise file storage for cache using cachedir path from config.
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$this->storage = new Caching\Storages\FileStorage($this->config->get('cachedir').'/application');
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// Initialise a cache object for each cache name/type specified in caches array.
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array_walk($this->caches, function(&$cachedef, $cachename) {
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$cachedef['cache'] = new Caching\Cache($this->storage, $cachename);
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});
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}
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/**
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* Read the specified item from the cache or generate it, mostly a wrapper
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* around Nette\Caching\Cache::load().
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*
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* @param string $cachename The name of a cache type, must match a key in $caches definition.
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* @param callable $callback The code from which the result should be stored in cache.
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* @return mixed The result of callback function retreieved from cache.
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*/
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public function load(string $cachename, callable $callback): mixed {
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// If cachebypass has been set in config.php then just execute the callback.
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if ($this->config->parse_bool($this->config->get('cachebypass'))) {
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return $callback();
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}
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// We can only work with caches that have already been defined.
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if (!array_key_exists($cachename, $this->caches)) {
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throw new \Exception('Cache name not found ('.$cachename.')');
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}
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// Retrieve the initialised cache object from $caches, defines the caches expiry
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// and executes the callback.
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return $this->caches[$cachename]['cache']->load($cachename,
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function (&$dependencies) use ($callback, $cachename) {
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$dependencies[$this->caches[$cachename]['expirationtype']] = $this->caches[$cachename]['expirationparams'];
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return $callback();
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}
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);
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}
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}
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