/packages/Image/ImageCache/Managers/ImageCache.class.php

 1<?php
 2class ImageCache
 3{
 4	protected $config;
 5	
 6	public function __construct(Config $config){
 7		$this->config = $config;
 8		
 9		ensurePathLastSlash($this->config->cacheDir);
10	}
11	
12	/**
13	 * Generate image cache and return resulting path
14	 * 
15	 * @param string $folderName
16	 * @param Image $image
17	 * @param boolean $forceGenerate
18	 * @throws InvalidArgumentException
19	 * @throws RuntimeException
20	 * @return string
21	 */
22	public function generateImageCache($folderName, Image $image, $forceGenerate = false){
23		if(!in_array($folderName, $this->config->folders->toArray())){
24			throw new InvalidArgumentException("There is no such folder defined with name $folderName!");
25		}
26		if(!file_exists($this->config->cacheDir . $folderName)){
27			throw new RuntimeException("There is no such folder $folderName in cache directory!");
28		}
29		
30		$resultingFilePath = $this->config->cacheDir . $folderName . "/" . $image->fileName;
31		
32		if($forceGenerate or !file_exists($resultingFilePath)){
33			switch ($image->getType()){
34				case Image::IMAGE_TYPE_JPEG:
35					$image->writeJpeg($resultingFilePath);
36					break;
37				case Image::IMAGE_TYPE_GIF:
38					$image->writeGif($resultingFilePath);
39					break;
40				case Image::IMAGE_TYPE_PNG:
41					$image->writePng($resultingFilePath);
42					break;
43			}
44		}
45		
46		return $resultingFilePath;
47	}
48	
49	/**
50	 * Checks if image cache is present
51	 * 
52	 * @param string $folderName
53	 * @param string $fileName
54	 * @throws InvalidArgumentException
55	 * @throws RuntimeException
56	 * @return boolean
57	 */
58	public function isImageCached($folderName, $fileName){
59		if(!in_array($folderName, $this->config->folders->toArray())){
60			throw new InvalidArgumentException("There is no such folder defined with name $folderName!");
61		}
62		if(!file_exists($this->config->cacheDir . $folderName)){
63			throw new RuntimeException("There is no such folder $folderName in cache directory!");
64		}
65		
66		$resultingFilePath = $this->config->cacheDir . $folderName . "/" . $fileName;
67		
68		if(file_exists($resultingFilePath)){
69			return true;
70		}
71		return false;
72	}
73	
74	/**
75	 * Clear cache of given photo filename 
76	 * @param string $fileName
77	 */
78	public function clearImageCache($fileName){
79		if(empty($fileName)){
80			throw new InvalidArgumentException("\$fileName is empty!");
81		}
82		foreach ($this->config->folders as $folderName){
83			if(file_exists($this->config->cacheDir . $folderName . "/" . $fileName)){
84				@unlink($this->config->cacheDir . $folderName . "/" . $fileName);
85			}
86		}
87	}
88	
89	/**
90	 * Clear whole image cache 
91	 */
92	public function clearWholeImageCache(){
93		foreach ($this->config->folders as $folderName){
94			@unlink($this->config->cacheDir . $folderName . "/*");
95		}
96	}
97}