2 /************************************************************************
3 * MXChange v0.2.1 Start: 10/22/2009 *
4 * =============== Last change: 10/22/2009 *
6 * -------------------------------------------------------------------- *
7 * File : cachesystem.class.php *
8 * -------------------------------------------------------------------- *
9 * Short description : CacheSystem class *
10 * -------------------------------------------------------------------- *
11 * Kurzbeschreibung : CacheSystem-Klasse *
12 * -------------------------------------------------------------------- *
15 * $Tag:: 0.2.1-FINAL $ *
17 * Needs to be in all Files and every File needs "svn propset *
18 * svn:keywords Date Revision" (autoprobset!) at least!!!!!! *
19 * -------------------------------------------------------------------- *
20 * Copyright (c) 2003 - 2009 by Roland Haeder *
21 * For more information visit: http://www.mxchange.org *
23 * This program is free software; you can redistribute it and/or modify *
24 * it under the terms of the GNU General Public License as published by *
25 * the Free Software Foundation; either version 2 of the License, or *
26 * (at your option) any later version. *
28 * This program is distributed in the hope that it will be useful, *
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
31 * GNU General Public License for more details. *
33 * You should have received a copy of the GNU General Public License *
34 * along with this program; if not, write to the Free Software *
35 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
37 ************************************************************************/
39 // Some security stuff...
40 if (!defined('__SECURITY')) {
51 var $version = array();
53 var $rebuilt = array();
54 var $extension = '.cache';
55 var $statusDone = 'done';
56 var $status = array();
57 var $readable = array();
60 function CacheSystem () {
61 // Failed is the default
62 $this->ret = 'failed';
66 // Check if path exists
67 if (isDirectory(getConfig('CACHE_PATH'))) {
68 // Is there a .htaccess file?
69 if (isFileReadable(getConfig('CACHE_PATH') . '.htaccess')) {
71 $this->ret = $this->statusDone;
73 // Stop! Set a .htaccess file first
74 $this->ret = 'htaccess';
79 // Checks validity of cache file and if content is given
80 function loadCacheFile ($cacheName) {
81 // Remember cache file
82 $this->name = $cacheName;
84 // Construct FQFN (full qualified file name)
85 $this->fqfn = getConfig('CACHE_PATH') . $cacheName . $this->extension;
87 // Check if file exists and if version matches
88 if (!isset($this->status[$cacheName])) {
89 // Pre-fetch cache here if found
90 if ($this->isCacheReadable()) $this->getArrayFromCache();
92 //* DEBUG: */ print($cacheName.'='.intval($this->isCacheReadable()).'/'.intval(is_writeable($this->fqfn)).'/'.intval($this->extensionVersionMatches('cache')).'<br />');
93 $this->status[$cacheName] = ($this->isCacheReadable() && (is_writeable($this->fqfn)) && ($this->extensionVersionMatches('cache')));
95 //* DEBUG: */ print($cacheName.'='.intval($this->status[$cacheName]).'<br />');
98 return $this->status[$cacheName];
101 // Initializes the cache file
103 // This will destory an existing cache file!
104 if ($this->ret == $this->statusDone) {
106 $this->resetCacheReadStatus();
109 if ($this->isCacheReadable()) changeMode($this->fqfn, 0666);
110 $this->pointer = fopen($this->fqfn, 'w') or app_die(__METHOD__, __LINE__, "Cannot write to cache ".$this->fqfn." !");
113 fwrite($this->pointer, "<?php\n");
115 // Cannot create file
116 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
120 // Reset the read status
121 function resetCacheReadStatus () {
122 unset($this->readable[$this->name]);
123 unset($GLOBALS['file_readable'][$this->fqfn]);
124 unset($this->status[$this->name]);
127 function addRow ($data) {
128 // Is the pointe rvalid?
129 if (is_resource($this->pointer)) {
130 // Write every array element to cache file
131 foreach ($data as $k => $v) {
132 // Write global cache array for immediate access
133 if ((substr($k, 0, 4) == 'ext_') && (isset($data['ext_name'])) && (isset($data['ext_id']))) {
134 if ($k == 'ext_name') {
135 $GLOBALS['cache_array']['extension'][$k][$data['ext_id']] = $v;
137 $GLOBALS['cache_array']['extension'][$k][$data['ext_name']] = $v;
139 if (($k == 'ext_keep') && ($v == 'Y')) {
140 $GLOBALS['cache_array']['active_extensions'][$data['ext_name']] = $v;
142 } elseif (is_array($v)) {
143 // Serialize and BASE64-encode the array
144 $v = base64_encode(serialize($v));
145 } elseif ($this->name == 'config') {
147 $GLOBALS['cache_array']['config'][$data['config']][$k] = $v;
148 } elseif ($this->name == 'filter') {
150 $GLOBALS['cache_array']['filter']['chains'][$data['filter_name']][$data['filter_function']] = $data['filter_active'];
151 $GLOBALS['cache_array']['filter']['counter'][$data['filter_name']][$data['filter_function']] = $data['filter_counter'];
152 $GLOBALS['cache_array']['filter']['loaded'][$data['filter_name']][$data['filter_function']] = true;
153 } elseif ($this->name == 'modules') {
155 $GLOBALS['cache_array']['modules'][$k][$data['module']] = $v;
156 } elseif ($this->name == 'admin') {
159 $GLOBALS['cache_array']['admin'][$k][$data['admin_id']] = $v;
161 $GLOBALS['cache_array']['admin'][$k][$data['login']] = $v;
163 } elseif ($this->name == 'refdepths') {
165 $GLOBALS['cache_array']['refdepths'][$k][$data['id']] = $v;
166 } elseif ($this->name == 'refsystem') {
168 $GLOBALS['cache_array']['refsystem'][$k][$data['id']] = $v;
169 } elseif ($this->name == 'revision') {
171 $GLOBALS['cache_array']['revision'][$k] = $v;
172 } elseif ($this->name == 'themes') {
174 if ($k == 'theme_path') {
175 $GLOBALS['cache_array']['themes'][$k][$data['id']] = $v;
177 $GLOBALS['cache_array']['themes'][$k][$data['theme_path']] = $v;
180 // Finialize the cache and close it
184 $this->removeCacheFile(true);
186 // Unsupported cache found!
187 debug_report_bug('Unsupported cache ' . $this->name . ' detected.');
190 // Write cache line to file
191 fwrite($this->pointer, $this->rewriteEntry($k, $v));
194 // Cannot create file
195 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
199 function finalize () {
200 // Quit function when no pointer is set
201 if (is_resource($this->pointer)) {
202 // Add default depency
203 $this->storeExtensionVersion('cache');
206 fwrite($this->pointer, "?>\n");
208 // Close file add destroy handler
209 fclose($this->pointer);
211 // Reset readable status
212 $this->resetCacheReadStatus();
215 if ($this->isCacheReadable()) changeMode($this->fqfn, 0666);
217 // Remove pointer and status
218 unset($this->status[$this->name]);
219 $this->pointer = false;
220 //* DEBUG: */ outputHtml(__METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - FINALIZED!<br />");
224 function getArrayFromCache () {
225 // Is the cache already loaded?
226 if (isset($this->data[$this->name])) {
227 // Return it's content!
228 return $this->data[$this->name];
231 // Is the cache file there?
232 if ($this->isCacheReadable()) {
234 require($this->fqfn);
236 // Is there an array?
237 if (isset($this->data[$this->name])) {
238 // Cache version found?
239 if (isset($this->version[$this->name])) {
240 // Check it here if cache matches ext-cache version
241 if (!$this->extensionVersionMatches('cache')) {
243 logDebugMessage(__METHOD__, __LINE__, 'Invalid cache data ' . $this->name . ' detected.');
244 $this->removeCacheFile();
248 // Return cache if detected
249 if (isset($this->data[$this->name])) {
250 return $this->data[$this->name];
253 logDebugMessage(__METHOD__, __LINE__, 'Possible damaged cache ' . $this->name . ' detected.');
254 $this->removeCacheFile();
258 // Cache file not found or not readable
259 debug_report_bug($this->name);
260 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".sprintf(getMessage('CACHE_CANNOT_LOAD'), $this->fqfn));
263 $this->removeCacheFile();
266 // Always return an empty array if we have trouble or no data
270 // Destroy an existing cache file
271 function removeCacheFile ($force = false) {
273 $this->resetCacheReadStatus();
276 /* DEBUG: */ logDebugMessage(__METHOD__, __LINE__, sprintf("%s should be removed.", $this->name));
278 // Is the cache file not yet rebuilt?
279 if ((!isset($this->rebuilt[$this->name])) && ($this->isCacheReadable())) {
280 // Only run in regular output mode
281 if ((getOutputMode() != 0) && ($force === false)) {
282 // Debug message if allowed
283 if (isDebugModeEnabled()) {
285 logDebugMessage(__METHOD__, __LINE__, 'Not removing cache ' . $this->name . ' in output_mode=' . getOutputMode());
295 // Debug-mode enabled?
296 if (isDebugModeEnabled()) {
297 // Log removal of cache
298 logDebugMessage(__METHOD__, __LINE__, 'removing cache: ' . $this->name);
301 // Remove cache file from system
302 removeFile($this->fqfn);
305 $this->resetCacheReadStatus();
307 // Is the file there?
308 if (!$this->isCacheReadable()) {
309 // The cache does no longer exist so kill the content
310 unset($this->data[$this->name]);
311 unset($this->version[$this->name]);
312 $this->rebuilt[$this->name] = true;
315 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".sprintf(getMessage('CACHE_CANNOT_UNLINK'), $this->fqfn));
321 function removeEntry ($search, $data, $array) {
322 if ($this->status[$this->name] == $this->statusDone) {
323 // Load cache into dummy array
324 $dummy = $this->getArrayFromCache();
326 // Search for key in array
327 $key = array_search($data, $dummy[$search]);
329 // Key (hopefully) found?
330 foreach ($array as $a) {
331 // So we can remove all elements as requested
332 unset($dummy[$a][$key]);
335 // Flush array to cache file
339 $this->writeArray($dummy);
345 // Cannot write to cache!
346 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
350 function writeArray ($array) {
351 if (is_resource($this->pointer)) {
352 foreach ($array as $k => $v) {
354 // Multi line(s) found
356 foreach($v as $k2 => $v2) {
357 // Put every array element in a row...
358 $LINE .= $this->rewriteEntry($k, $v2);
362 $LINE = $this->rewriteEntry($k, $v);
366 fwrite($this->pointer, $LINE);
369 // Cannot write array!
370 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
375 function replaceEntry ($search, $replace, $search_key, $array) {
376 if ($this->status[$this->name] == $this->statusDone) {
377 // Load cache into dummy array
378 $dummy = $this->getArrayFromCache();
380 // Check if $dummy is valid (prevents some errors)
381 if ((is_array($dummy)) && (isset($dummy[$search])) && (is_array($dummy[$search]))) {
382 // Search for key in array
383 $key_found = array_key_exists($search_key, $dummy[$search]);
384 if ($key_found == true) {
386 // Key (hopefully) found?
387 foreach ($dummy as $a => $v) {
388 // So we can update all entries
391 $dummy[$a][$search_key] = $replace;
395 // Flush array to cache file
399 $this->writeArray($dummy);
406 // Cannot write to cache!
407 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
411 // Writes the version of given extension to the cache file
412 function storeExtensionVersion ($ext_name) {
413 // Valid cache pointer?
414 if (is_resource($this->pointer)) {
415 // Write only if extension is installed
416 if (isExtensionInstalled($ext_name)) {
417 // Get extension version
418 $ext_ver = getExtensionVersion($ext_name);
420 // Write cache line to file
421 fwrite($this->pointer, $this->rewriteEntry($ext_name, $ext_ver, 'version', true));
423 // Add the extension version to object (DO NOT REMOVE IT! Endless loop...)
424 $this->version[$this->name][$ext_name] = $ext_ver;
426 //* DEBUG: */ outputHtml(__METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - {$ext_name}={$ext_ver}<br />");
428 // Cannot create file
429 addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
433 // Checks wether versions from cache and extension matches
434 function extensionVersionMatches ($ext_name) {
435 // Default is not matching
438 // Compare only if installed
439 if (isExtensionInstalled($ext_name)) {
440 // Get extension version
441 $ext_ver = getExtensionVersion($ext_name);
444 if (isset($this->version[$this->name][$ext_name])) {
446 $matches = ((isset($this->version[$this->name][$ext_name])) && ($this->version[$this->name][$ext_name] == $ext_ver));
447 } elseif ($this->isCacheReadable()) {
448 // No cache version found!
449 logDebugMessage(__METHOD__, __LINE__, "Cache {$this->name} has missing version entry for extension {$ext_name}! Purging cache...");
451 // Remove the cache file
452 $this->removeCacheFile(true);
455 // Not installed, does always match
463 // Rewrit the entry so it can be stored in cache file
464 // @TODO Add support for more types which break in last else-block
465 function rewriteEntry ($key, $value, $prefix = 'data', $single = false) {
466 // Default is not single entry
469 // Add only for single array entry?
470 if ($single === true) $extender = '';
475 // String or non-string? ;-)
476 if (is_string($value)) {
478 $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = '" . smartAddSlashes($value) . "';\n";
479 } elseif (is_null($value)) {
481 $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = null;\n";
482 } elseif (is_bool($value)) {
484 if ($value === true) {
486 $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = true;\n";
489 $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = false;\n";
493 $line = '$this->' . $prefix . "['".$this->name."']['" . $key . "']" . $extender . " = " . $value . ";\n";
500 // Getter for cache status
501 function getStatus () {
505 // Checks wether the current cache file is readable
506 function isCacheReadable () {
507 // Array entry found?
508 if (!isset($this->readable[$this->name])) {
509 // Not found, so create it
510 $this->readable[$this->name] = isFileReadable($this->fqfn);
514 return $this->readable[$this->name];