1<?php
2
3/**
4 * Smarty cache resource file clear method
5 *
6 * @package    Smarty
7 * @subpackage PluginsInternal
8 * @author     Uwe Tews
9 */
10
11/**
12 * Smarty Internal Runtime Cache Resource File Class
13 *
14 * @package    Smarty
15 * @subpackage PluginsInternal
16 */
17class Smarty_Internal_Runtime_CacheResourceFile
18{
19    /**
20     * Empty cache for a specific template
21     *
22     * @param Smarty  $smarty
23     * @param string  $resource_name template name
24     * @param string  $cache_id      cache id
25     * @param string  $compile_id    compile id
26     * @param integer $exp_time      expiration time (number of seconds, not timestamp)
27     *
28     * @return integer number of cache files deleted
29     */
30    public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
31    {
32        $_cache_id = isset($cache_id) ? preg_replace('![^\w\|]+!', '_', $cache_id) : null;
33        $_compile_id = isset($compile_id) ? preg_replace('![^\w]+!', '_', $compile_id) : null;
34        $_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
35        $_compile_id_offset = $smarty->use_sub_dirs ? 3 : 0;
36        $_dir = $smarty->getCacheDir();
37        if ($_dir == '/') { //We should never want to delete this!
38            return 0;
39        }
40        $_dir_length = strlen($_dir);
41        if (isset($_cache_id)) {
42            $_cache_id_parts = explode('|', $_cache_id);
43            $_cache_id_parts_count = count($_cache_id_parts);
44            if ($smarty->use_sub_dirs) {
45                foreach ($_cache_id_parts as $id_part) {
46                    $_dir .= $id_part . $smarty->ds;
47                }
48            }
49        }
50        if (isset($resource_name)) {
51            $_save_stat = $smarty->caching;
52            $smarty->caching = true;
53            $tpl = new $smarty->template_class($resource_name, $smarty);
54            $smarty->caching = $_save_stat;
55
56            // remove from template cache
57            $tpl->source; // have the template registered before unset()
58
59            if ($tpl->source->exists) {
60                $_resourcename_parts = basename(str_replace('^', '/', $tpl->cached->filepath));
61            } else {
62                return 0;
63            }
64        }
65        $_count = 0;
66        $_time = time();
67        if (file_exists($_dir)) {
68            $_cacheDirs = new RecursiveDirectoryIterator($_dir);
69            $_cache = new RecursiveIteratorIterator($_cacheDirs, RecursiveIteratorIterator::CHILD_FIRST);
70            foreach ($_cache as $_file) {
71                if (substr(basename($_file->getPathname()), 0, 1) == '.') {
72                    continue;
73                }
74                $_filepath = (string) $_file;
75                // directory ?
76                if ($_file->isDir()) {
77                    if (!$_cache->isDot()) {
78                        // delete folder if empty
79                        @rmdir($_file->getPathname());
80                    }
81                } else {
82                    // delete only php files
83                    if (substr($_filepath, -4) !== '.php') {
84                        continue;
85                    }
86                    $_parts = explode($_dir_sep, str_replace('\\', '/', substr($_filepath, $_dir_length)));
87                    $_parts_count = count($_parts);
88                    // check name
89                    if (isset($resource_name)) {
90                        if ($_parts[ $_parts_count - 1 ] != $_resourcename_parts) {
91                            continue;
92                        }
93                    }
94                    // check compile id
95                    if (isset($_compile_id) && (!isset($_parts[ $_parts_count - 2 - $_compile_id_offset ]) ||
96                                                $_parts[ $_parts_count - 2 - $_compile_id_offset ] != $_compile_id)
97                    ) {
98                        continue;
99                    }
100                    // check cache id
101                    if (isset($_cache_id)) {
102                        // count of cache id parts
103                        $_parts_count = (isset($_compile_id)) ? $_parts_count - 2 - $_compile_id_offset :
104                            $_parts_count - 1 - $_compile_id_offset;
105                        if ($_parts_count < $_cache_id_parts_count) {
106                            continue;
107                        }
108                        for ($i = 0; $i < $_cache_id_parts_count; $i ++) {
109                            if ($_parts[ $i ] != $_cache_id_parts[ $i ]) {
110                                continue 2;
111                            }
112                        }
113                    }
114                    // expired ?
115                    if (isset($exp_time)) {
116                        if ($exp_time < 0) {
117                            preg_match('#\'cache_lifetime\' =>\s*(\d*)#', file_get_contents($_file), $match);
118                            if ($_time < (@filemtime($_file) + $match[ 1 ])) {
119                                continue;
120                            }
121                        } else {
122                            if ($_time - @filemtime($_file) < $exp_time) {
123                                continue;
124                            }
125                        }
126                    }
127                    $_count += @unlink($_filepath) ? 1 : 0;
128                    if (function_exists('opcache_invalidate') && strlen(ini_get("opcache.restrict_api")) < 1) {
129                        opcache_invalidate($_filepath, true);
130                    }
131                }
132            }
133        }
134        return $_count;
135    }
136}