Maslosoft\Addendum\Cache\PhpCache

Complexity

Total Complexity

43

Size/Duplication

Total Lines	300
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	6

Test Coverage

Coverage

77.59%

Importance

Changes	6
Bugs	1	Features	0

14 Methods

Rating	Name	Duplication	Size	Complexity
A	setComponent()	0	6	1
B	__construct()	0	29	5
A	setOptions()	0	5	1
D	prepare()	0	36	10
A	clear()	0	5	1
A	clearCurrentPath()	0	5	1
B	clearPath()	0	13	5
A	getFilename()	0	17	3
C	get()	0	50	9
A	set()	0	12	1
A	remove()	0	11	2
A	getCacheKey()	0	12	2
A	classToFile()	0	4	1
A	mkdir()	0	6	1

<?php

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

namespace Maslosoft\Addendum\Cache;

use FilesystemIterator;
use Maslosoft\Addendum\Addendum;
use Maslosoft\Addendum\Helpers\SoftIncluder;
use Maslosoft\Addendum\Interfaces\AnnotatedInterface;
use Maslosoft\Addendum\Options\MetaOptions;
use Maslosoft\Cli\Shared\ConfigDetector;
use Maslosoft\Cli\Shared\Helpers\PhpExporter;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use ReflectionClass;
use RuntimeException;
use UnexpectedValueException;

/**
 * PhpCache
 *
 * @author Piotr Maselkowski <pmaselkowski at gmail.com>
 */
abstract class PhpCache
{

	private $metaClass = null;
	private $component = null;

	/**
	 * Options
	 * @var string
	 */
	private $instanceId = null;

	/**
	 * Addendum runtime path
	 * @var string
	 */
	private $path = '';

	/**
	 *
	 * @var NsCache
	 */
	private $nsCache = null;

	/**
	 *
	 * @var Addendum
	 */
	private $addendum = null;

	/**
	 * Runtime path
	 * @var string
	 */
	private static $runtimePath = null;

	/**
	 * Local cacheq
	 * @var type
	 */
	private static $cache = [];

	/**
	 * Hash map of prepared directories
	 * Key is directory, value is flag indicating if it's prepared.
	 * @var bool[]
	 */
	private static $prepared = [];
	private $fileName = null;

	/**
	 *
	 * @param string $metaClass
	 * @param AnnotatedInterface|string $component
	 * @param MetaOptions|Addendum $options
	 */
	public function __construct($metaClass = null, $component = null, $options = null)
	{
		if (null === self::$runtimePath)
		{
			self::$runtimePath = (new ConfigDetector)->getRuntimePath();
		}
		$this->path = self::$runtimePath . '/addendum';
		$this->metaClass = $metaClass;
		$this->component = $component;
		if (empty($options))
		{
			$this->instanceId = Addendum::DefaultInstanceId;
		}
		elseif ($options instanceof Addendum)
		{
			$this->instanceId = $options->getInstanceId();
		}
		elseif ($options instanceof MetaOptions)
		{
			$this->instanceId = $options->instanceId;
		}
		else
		{
			throw new UnexpectedValueException('Unknown options');
		}
		$this->prepare();
		$this->addendum = Addendum::fly($this->instanceId);
		$this->nsCache = new NsCache(dirname($this->getFilename()), $this->addendum);
	}

	/**
	 * Set working component
	 * @param AnnotatedInterface|string $component
	 */
	public function setComponent($component = null)
	{
		// Reset filename as it depends on component
		$this->fileName = null;
		$this->component = $component;
	}

	public function setOptions(MetaOptions $options = null)
	{
		$this->fileName = null;
		$this->nsCache->setOptions($options);
	}

	private function prepare()
	{
		$fileDir = dirname($this->getFilename());
		if (isset(self::$prepared[$fileDir]) && self::$prepared[$fileDir])
		{
			return true;
		}
		if (!file_exists($this->path))
		{
			if (!file_exists(self::$runtimePath))
			{

				if (is_writable(dirname(self::$runtimePath)))
				{
					$this->mkdir(self::$runtimePath);
				}
				if (!is_writable(self::$runtimePath))
				{
					throw new RuntimeException(sprintf("Runtime path `%s` must exists and be writable", self::$runtimePath));
				}
			}
			if (is_writable(self::$runtimePath))
			{
				$this->mkdir($this->path);
			}
			if (!is_writable($this->path))
			{
				throw new RuntimeException(sprintf("Addendum runtime path `%s` must exists and be writable", $this->path));
			}
		}
		if (!file_exists($fileDir))
		{
			$this->mkdir($fileDir);
		}
		self::$prepared[$fileDir] = true;
	}

	public function get()
	{
		$this->prepare();
		$fileName = $this->getFilename();

		if (!$this->nsCache->valid())
		{
			$this->clearCurrentPath();
			return false;
		}
		$key = $this->getCacheKey();
		if (isset(self::$cache[$key]))
		{
			return self::$cache[$key];
		}

		$data = SoftIncluder::includeFile($fileName);

		// Only false means not existing cache.
		// NOTE: Cache might have valid `empty` value, ie. empty array.
		if (false === $data)
		{
			return false;
		}

		// Purge file cache if checkMTime is enabled and file obsolete
		if ($this->addendum->checkMTime && file_exists($fileName))
		{
			$cacheTime = filemtime($fileName);

			// Partial component name, split by @ and take first argument
			if (is_string($this->component) && strstr($this->component, '@'))
			{
				$parts = explode('@', $this->component);
				$componentClass = array_shift($parts);
			}
			else
			{
				$componentClass = $this->component;
			}
			$componentTime = filemtime((new ReflectionClass($componentClass))->getFileName());
			if ($componentTime > $cacheTime)
			{
				$this->remove();
				return false;
			}
		}
		self::$cache[$key] = $data;
		return $data;
	}

	public function set($data)
	{
		$fileName = $this->getFilename();
		$this->prepare();
		$key = $this->getCacheKey();
		self::$cache[$key] = $data;

		file_put_contents($fileName, PhpExporter::export($data));
		@chmod($fileName, 0666);
		$this->nsCache->set();
		return $data;
	}

	public function remove()
	{
		$fileName = $this->getFilename();
		$key = $this->getCacheKey();
		unset(self::$cache[$key]);
		if (file_exists($fileName))
		{
			return unlink($fileName);
		}
		return false;
	}

	/**
	 * Clear entire cache
	 * @return boolean
	 */
	public function clear()
	{
		self::$prepared = [];
		return $this->clearPath($this->path);
	}

	private function clearCurrentPath()
	{
		$path = dirname($this->getFilename());
		return $this->clearPath($path);
	}

	private function clearPath($path)
	{
		if (!file_exists($path))
		{
			return false;
		}
		foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path, FilesystemIterator::SKIP_DOTS), RecursiveIteratorIterator::CHILD_FIRST) as $dir)
		{
			$dir->isDir() && !$dir->isLink() ? rmdir($dir->getPathname()) : unlink($dir->getPathname());
		}
		self::$prepared[$path] = false;
		return rmdir($path);
	}

	private function getFilename()
	{
		if (!empty($this->fileName))
		{
			return $this->fileName;
		}
		if (is_object($this->component))
		{
			$className = get_class($this->component);
		}
		else
		{
			$className = $this->component;
		}
		$this->fileName = sprintf('%s/%s@%s/%s.php', $this->path, $this->classToFile($this->metaClass), $this->instanceId, str_replace('\\', '/', $this->classToFile($className)));
		return $this->fileName;
	}

	private function getCacheKey()
	{
		if (is_object($this->component))
		{
			$className = get_class($this->component);
		}
		else
		{
			$className = $this->component;
		}
		return sprintf('%s@%s@%s@%s.php', $this->classToFile(static::class), $this->classToFile($this->metaClass), $this->instanceId, str_replace('\\', '/', $this->classToFile($className)));
	}

	/**
	 * Convert slash separated class name to dot separated name.
	 * @param string $className
	 * @return string
	 */
	private function classToFile($className)
	{
		return str_replace('\\', '.', $className);
	}

	/**
	 * Recursively create dir with proper permissions.
	 *
	 * @param string $path
	 */
	private function mkdir($path)
	{
		$mask = umask(0000);
		mkdir($path, 0777, true);
		umask($mask);
	}

}