1<?php
2/**
3 * Smarty cache resource file clear method
4 *
5 * @package    Smarty
6 * @subpackage PluginsInternal
7 * @author     Uwe Tews
8 */
9
10/**
11 * Smarty Internal Runtime Cache Resource File Class
12 *
13 * @package    Smarty
14 * @subpackage PluginsInternal
15 */
16class Smarty_Internal_Runtime_CacheResourceFile
17{
18    /**
19     * Empty cache for a specific template
20     *
21     * @param Smarty  $smarty
22     * @param string  $resource_name template name
23     * @param string  $cache_id      cache id
24     * @param string  $compile_id    compile id
25     * @param integer $exp_time      expiration time (number of seconds, not timestamp)
26     *
27     * @return integer number of cache files deleted
28     */
29    public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
30    {
31        $_cache_id = isset($cache_id) ? preg_replace('![^\w\|]+!', '_', $cache_id) : null;
32        $_compile_id = isset($compile_id) ? preg_replace('![^\w]+!', '_', $compile_id) : null;
33        $_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
34        $_compile_id_offset = $smarty->use_sub_dirs ? 3 : 0;
35        $_dir = $smarty->getCacheDir();
36        if ($_dir === '/') { //We should never want to delete this!
37            return 0;
38        }
39        $_dir_length = strlen($_dir);
40        if (isset($_cache_id)) {
41            $_cache_id_parts = explode('|', $_cache_id);
42            $_cache_id_parts_count = count($_cache_id_parts);
43            if ($smarty->use_sub_dirs) {
44                foreach ($_cache_id_parts as $id_part) {
45                    $_dir .= $id_part . '/';
46                }
47            }
48        }
49        if (isset($resource_name)) {
50            $_save_stat = $smarty->caching;
51            $smarty->caching = Smarty::CACHING_LIFETIME_CURRENT;
52            $tpl = new $smarty->template_class($resource_name, $smarty);
53            $smarty->caching = $_save_stat;
54            // remove from template cache
55            $tpl->source; // have the template registered before unset()
56            if ($tpl->source->exists) {
57                $_resourcename_parts = basename(str_replace('^', '/', $tpl->cached->filepath));
58            } else {
59                return 0;
60            }
61        }
62        $_count = 0;
63        $_time = time();
64        if (file_exists($_dir)) {
65            $_cacheDirs = new RecursiveDirectoryIterator($_dir);
66            $_cache = new RecursiveIteratorIterator($_cacheDirs, RecursiveIteratorIterator::CHILD_FIRST);
67            foreach ($_cache as $_file) {
68                if (substr(basename($_file->getPathname()), 0, 1) === '.') {
69                    continue;
70                }
71                $_filepath = (string)$_file;
72                // directory ?
73                if ($_file->isDir()) {
74                    if (!$_cache->isDot()) {
75                        // delete folder if empty
76                        @rmdir($_file->getPathname());
77                    }
78                } else {
79                    // delete only php files
80                    if (substr($_filepath, -4) !== '.php') {
81                        continue;
82                    }
83                    $_parts = explode($_dir_sep, str_replace('\\', '/', substr($_filepath, $_dir_length)));
84                    $_parts_count = count($_parts);
85                    // check name
86                    if (isset($resource_name)) {
87                        if ($_parts[ $_parts_count - 1 ] !== $_resourcename_parts) {
88                            continue;
89                        }
90                    }
91                    // check compile id
92                    if (isset($_compile_id) && (!isset($_parts[ $_parts_count - 2 - $_compile_id_offset ])
93                                                || $_parts[ $_parts_count - 2 - $_compile_id_offset ] !== $_compile_id)
94                    ) {
95                        continue;
96                    }
97                    // check cache id
98                    if (isset($_cache_id)) {
99                        // count of cache id parts
100                        $_parts_count = (isset($_compile_id)) ? $_parts_count - 2 - $_compile_id_offset :
101                            $_parts_count - 1 - $_compile_id_offset;
102                        if ($_parts_count < $_cache_id_parts_count) {
103                            continue;
104                        }
105                        for ($i = 0; $i < $_cache_id_parts_count; $i++) {
106                            if ($_parts[ $i ] !== $_cache_id_parts[ $i ]) {
107                                continue 2;
108                            }
109                        }
110                    }
111                    if (is_file($_filepath)) {
112                        // expired ?
113                        if (isset($exp_time)) {
114                            if ($exp_time < 0) {
115                                preg_match('#\'cache_lifetime\' =>\s*(\d*)#', file_get_contents($_filepath), $match);
116                                if ($_time < (filemtime($_filepath) + $match[ 1 ])) {
117                                    continue;
118                                }
119                            } else {
120                                if ($_time - filemtime($_filepath) < $exp_time) {
121                                    continue;
122                                }
123                            }
124                        }
125                        $_count += @unlink($_filepath) ? 1 : 0;
126                        if (function_exists('opcache_invalidate')
127                            && (!function_exists('ini_get') || strlen(ini_get("opcache.restrict_api")) < 1)
128                        ) {
129                            opcache_invalidate($_filepath, true);
130                        } elseif (function_exists('apc_delete_file')) {
131                            apc_delete_file($_filepath);
132                        }
133                    }
134                }
135            }
136        }
137        return $_count;
138    }
139}
140