Init

2023-03-28 10:34:44 +02:00
parent f803effbbd
commit f7e0f37528
428 changed files with 9982 additions and 100 deletions
--- a/backend/resources/library/cache/cache.class.php
+++ b/backend/resources/library/cache/cache.class.php
@@ -0,0 +1,149 @@
+<?php
+if (!defined('PICONTROL')) exit();
+
+class Cache
+{
+	const FILE = 0;
+	const EXECUTION = 1;
+	const EXECUTION_NOCACHE = 2;
+	
+	private $name, $lifetime, $content, $type, $stream, $loadType = self::FILE, $efFunction, $efArgs, $modificationTime = 0, $statusCode = 0;
+	private $cachePath = CACHE_PATH;
+	private $fileSuffix = '.cache.php';
+	
+	public function __construct()
+	{
+		if (!func_num_args() >= 3)
+		{
+			$this->statusCode = 1;
+			return;
+		}
+		
+		$args = func_get_args();
+		$this->name = $args[0];
+		$function = $args[1];
+		$lifetime = 0;
+		unset($args[0], $args[1]);
+		$this->efFunction = $function;
+		$this->efArgs = $args;
+		
+		if (getConfig('cache:activation.cache', 'false') == 'false' || getConfig('cache:activation.'.$this->name, 'false') == 'false')
+		{
+			$this->loadType = self::EXECUTION_NOCACHE;
+			return;
+		}
+		
+		if (($cLifetime = getConfig('cache:lifetime.'.$this->name, 0)) != 0)
+			$lifetime = $cLifetime * 60;
+		
+		if (file_exists($this->cachePath.$this->name.$this->fileSuffix) && filemtime($this->cachePath.$this->name.$this->fileSuffix) > time() - $lifetime)
+			return;
+		
+		$this->loadType = self::EXECUTION;
+	}
+	
+	private function executeFunction()
+	{
+		$result = call_user_func_array($this->efFunction, $this->efArgs);
+		$this->setContent($result);
+	}
+	
+	public function setName($name)
+	{
+		$this->name = $name;
+	}
+	
+	public function setContent($content)
+	{
+		$this->content = serialize($content);
+		
+		if ($this->loadType == self::FILE || $this->loadType == self::EXECUTION)
+			$this->statusCode = $this->saveToFile();
+	}
+	
+	public function getContent()
+	{
+		return unserialize($this->content);
+	}
+	
+	public function getStatusCode()
+	{
+		return $this->statusCode;
+	}
+	
+	public function load()
+	{
+		if ($this->loadType == self::FILE)
+			$this->statusCode = $this->loadFromFile();
+		elseif ($this->loadType == self::EXECUTION || $this->loadType == self::EXECUTION_NOCACHE)
+			$this->statusCode = $this->executeFunction();
+		
+		return false;
+	}
+	
+	private function saveToFile()
+	{
+		if (($this->stream = fopen($this->cachePath.$this->name.$this->fileSuffix, 'w')) === false)
+			return 1;
+		
+		if (flock($this->stream, LOCK_EX) === false)
+			return 2;
+		
+		if (fwrite($this->stream, $this->content) === false)
+			return 3;
+		
+		if (flock($this->stream, LOCK_UN) === false)
+			return 4;
+		
+		fclose($this->stream);
+		
+		if (touch($this->cachePath.$this->name.$this->fileSuffix) === false)
+			return 5;
+		
+		return 0;
+	}
+	
+	private function loadFromFile()
+	{
+		if (!file_exists($this->cachePath.$this->name.$this->fileSuffix) || !is_writable($this->cachePath.$this->name.$this->fileSuffix))
+			return 6;
+		
+		if (($this->stream = fopen($this->cachePath.$this->name.$this->fileSuffix, 'r')) === false)
+			return 7;
+		
+		if (flock($this->stream, LOCK_SH) === false)
+			return 8;
+		
+		$data = '';
+		
+		while (!feof($this->stream))
+			$data .= fread($this->stream, 512);
+		
+		if (flock($this->stream, LOCK_UN) === false)
+			return 9;
+		
+		fclose($this->stream);
+		
+		$this->content = $data;
+		$this->modificationTime = filemtime($this->cachePath.$this->name.$this->fileSuffix);
+		
+		return 0;
+	}
+	
+	public function displayHint($boolean = false)
+	{
+		if ($this->statusCode != 0 || $this->loadType == self::EXECUTION || $this->loadType == self::EXECUTION_NOCACHE)
+			return NULL;
+		
+		if ($boolean == false)
+			return '<div><span class="cached" title="'._t('Stand').': '.formatTime($this->modificationTime).'"><span>'._t('Cached').'</span><a href="?s=settings&amp;do=cache&amp;clear='.$this->name.'&amp;redirect='.urlencode($_SERVER['QUERY_STRING']).'">'._t('Aktualisieren').'</a></span></div>';
+		else
+			return array('name' => $this->name, 'modificationTime' => $this->modificationTime);
+	}
+	
+	public function clear()
+	{
+		return unlink($this->cachePath.$this->name.$this->fileSuffix);
+	}
+}
+?>