Mercurial > SimpleWebPresenter

comparison FileCacheSet.inc @ 69:dd4ddedca4c5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add convenience header ScriptIncludeCache Split CacheTimeCheck and FileCacheSet
author Tom Fredrik "BFG" Klaussen <bfg@blenning.no>
date Thu, 11 Oct 2012 23:32:14 +0200
parents
children 62b9d7a35658
comparison
equal deleted inserted replaced
68:4dfa3f6a2dc1 69:dd4ddedca4c5
1 <?php
2 $baseDir = dirname(__FILE__);
3
4 include_once 'Logger.inc';
5 $cache = ScriptIncludeCache::instance(__FILE__);
6 $cache->cache_time("${baseDir}/Logger.inc");
7
8 class FileCacheSet {
9 private $newest = 0;
10 private $files = array();
11 private $parentCaches = array();
12
13 protected function __construct($parent = null) {
14 if ($parent) {
15 $this->addParent($parent);
16 }
17 }
18
19 protected function addParent($parent)
20 {
21 array_push($this->parentCaches, $parent);
22 }
23
24 /**
25 * List a set of files which contributes to this pages cacheset.
26 *
27 * @param $humanReadable If the timestamp should be humand readable.
28 *
29 * @return an associative array of file, and timestamp
30 */
31 function cacheSet($humanReadable = False)
32 {
33 $retVal = array();
34 foreach ($this->parentCaches as $parent) {
35 $retVal = array_merge($retVal, $parent->cacheSet($humanReadable));
36 }
37 foreach($this->files as $file) {
38 $mtime = filemtime($file);
39 if ($humanReadable)
40 $mtime = gmdate('D, d M Y H:i:s', $mtime) . ' GMT';
41
42 $retVal[$file] = $mtime;
43 }
44 return $retVal;
45 }
46
47 /**
48 * Include a file in the cacheset
49 *
50 * @param $path the path of the file
51 */
52 function cache_time($path)
53 {
54 if (!file_exists($path)) {
55 Logger::warn("${path} does not exist");
56 errorPage("Resource is not available");
57 }
58
59 array_push($this->files, $path);
60 $mtime = filemtime($path);
61 if ($mtime > $this->newest) {
62 $this->newest = $mtime;
63 }
64 }
65
66 function getNewest()
67 {
68 $newest = 0;
69 foreach ($this->parentCaches as $parent) {
70 $newest = max($newest, $parent->getNewest());
71 }
72 $newest = max($newest, $this->newest);
73 return $newest;
74 }
75 }
76
77 class ScriptIncludeCache extends FileCacheSet
78 {
79 private static $myInstance = 0;
80
81 protected function __construct($filename = False)
82 {
83 parent::__construct();
84 if ($filename)
85 $this->cache_time($filename);
86 $this->cache_time(__FILE__);
87 }
88
89 /**
90 * Generates a singleton instance of this CacheTimeCheck
91 *
92 * @param $filename an optional file to include in the cacheset
93 *
94 * @return a CacheTimeCheck object
95 */
96 function instance($filename = False)
97 {
98 if (! self::$myInstance)
99 self::$myInstance = new self($filename);
100 elseif ($filename)
101 self::$myInstance->cache_time($filename);
102 return self::$myInstance;
103 }
104
105 /**
106 * Convenience function to include a file, and add it to the cacheset.
107 *
108 * @param $path path of the file
109 * @param $basedir a directory to prepend to the path
110 */
111 function includeOnce($path, $basedir = false)
112 {
113 if ($basedir)
114 $path = $basedir . "/" . $path;
115 $this->cache_time($path);
116 include_once($path);
117 }
118 }
119 ?>