Passed
Push — master ( c0a3a7...3b84a4 )
by Jeroen
58:51
created

elgg_is_system_cache_enabled()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 2
Code Lines 1

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 1
CRAP Score 1

Importance

Changes 0
Metric Value
cc 1
eloc 1
nc 1
nop 0
dl 0
loc 2
rs 10
c 0
b 0
f 0
ccs 1
cts 1
cp 1
crap 1
1
<?php
2
/**
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 * Elgg cache
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 * Cache file interface for caching data.
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 *
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 * @package    Elgg.Core
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 * @subpackage Cache
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 */
9
10
/**
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 * Returns an \ElggCache object suitable for caching system information
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 *
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 * @return ElggCache
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 */
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function elgg_get_system_cache() {
16 1
	return _elgg_services()->fileCache;
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}
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19
/**
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 * Reset the system cache by deleting the caches
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 *
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 * @return void
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 */
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function elgg_reset_system_cache() {
25 4
	_elgg_services()->systemCache->reset();
26 4
}
27
28
/**
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 * Saves a system cache.
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 *
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 * @param string $type The type or identifier of the cache
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 * @param string $data The data to be saved
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 * @return bool
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 */
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function elgg_save_system_cache($type, $data) {
36 2
	return _elgg_services()->systemCache->save($type, $data);
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}
38
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/**
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 * Retrieve the contents of a system cache.
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 *
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 * @param string $type The type of cache to load
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 * @return string
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 */
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function elgg_load_system_cache($type) {
46 17
	return _elgg_services()->systemCache->load($type);
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}
48
49
/**
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 * Is system cache enabled
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 *
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 * @return bool
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 * @since 2.2.0
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 */
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function elgg_is_system_cache_enabled() {
56 4778
	return _elgg_services()->systemCache->isEnabled();
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}
58
59
/**
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 * Enables the system disk cache.
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 *
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 * Uses the 'system_cache_enabled' config with a boolean value.
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 * Resets the system cache.
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 *
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 * @return void
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 */
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function elgg_enable_system_cache() {
68 4
	_elgg_services()->systemCache->enable();
69 4
}
70
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/**
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 * Disables the system disk cache.
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 *
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 * Uses the 'system_cache_enabled' config with a boolean value.
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 * Resets the system cache.
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 *
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 * @return void
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 */
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function elgg_disable_system_cache() {
80 2
	_elgg_services()->systemCache->disable();
81 2
}
82
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/* Simplecache */
84
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/**
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 * Registers a view to simple cache.
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 *
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 * Simple cache is a caching mechanism that saves the output of
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 * a view and its extensions into a file.
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 *
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 * @warning Simple cached views must take no parameters and return
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 * the same content no matter who is logged in.
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 *
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 * @param string $view_name View name
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 *
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 * @return void
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 * @see elgg_get_simplecache_url()
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 * @since 1.8.0
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 */
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function elgg_register_simplecache_view($view_name) {
101 31
	_elgg_services()->simpleCache->registerView($view_name);
102 31
}
103
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/**
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 * Get the URL for the cached view.
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 *
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 * Recommended usage is to just pass the entire view name as the first and only arg:
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 *
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 * ```
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 * $blog_js = elgg_get_simplecache_url('elgg/blog/save_draft.js');
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 * $favicon = elgg_get_simplecache_url('favicon.ico');
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 * ```
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 *
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 * For backwards compatibility with older versions of Elgg, this function supports
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 * "js" or "css" as the first arg, with the rest of the view name as the second arg:
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 *
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 * ```
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 * $blog_js = elgg_get_simplecache_url('js', 'elgg/blog/save_draft.js');
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 * ```
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 *
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 * This automatically registers the view with Elgg's simplecache.
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 *
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 * @param string $view    The full view name
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 * @param string $subview If the first arg is "css" or "js", the rest of the view name
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 * @return string
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 * @since 1.8.0
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 */
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function elgg_get_simplecache_url($view, $subview = '') {
129 37
	return _elgg_services()->simpleCache->getUrl($view, $subview);
130
}
131
132
/**
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 * Is simple cache enabled
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 *
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 * @return bool
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 * @since 1.8.0
137
 */
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function elgg_is_simplecache_enabled() {
139 1
	return _elgg_services()->simpleCache->isEnabled();
140
}
141
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/**
143
 * Enables the simple cache.
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 *
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 * @see elgg_register_simplecache_view()
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 * @return void
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 * @since 1.8.0
148
 */
149
function elgg_enable_simplecache() {
150 1
	_elgg_services()->simpleCache->enable();
151 1
}
152
153
/**
154
 * Disables the simple cache.
155
 *
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 * @warning Simplecache is also purged when disabled.
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 *
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 * @see elgg_register_simplecache_view()
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 * @return void
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 * @since 1.8.0
161
 */
162
function elgg_disable_simplecache() {
163 1
	_elgg_services()->simpleCache->disable();
164 1
}
165
166
/**
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 * Recursively deletes a directory, including all hidden files.
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 *
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 * TODO(ewinslow): Move to filesystem package
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 *
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 * @param string $dir   The directory
172
 * @param bool   $empty If true, we just empty the directory
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 *
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 * @return boolean Whether the dir was successfully deleted.
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 * @access private
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 */
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function _elgg_rmdir($dir, $empty = false) {
178 52
	if (!$dir) {
179
		// realpath can return false
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		_elgg_services()->logger->warn(__FUNCTION__ . ' called with empty $dir');
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		return true;
182
	}
183 52
	if (!is_dir($dir)) {
184 2
		return true;
185
	}
186
187 51
	$files = array_diff(scandir($dir), ['.', '..']);
188
	
189 51
	foreach ($files as $file) {
190 49
		if (is_dir("$dir/$file")) {
191 46
			_elgg_rmdir("$dir/$file");
192
		} else {
193 49
			unlink("$dir/$file");
194
		}
195
	}
196
197 51
	if ($empty) {
198 1
		return true;
199
	}
200
	
201 50
	return rmdir($dir);
202
}
203
204
/**
205
 * Deletes all cached views in the simplecache and sets the lastcache and
206
 * lastupdate time to 0 for every valid viewtype.
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 *
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 * @return bool
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 * @since 1.7.4
210
 */
211
function elgg_invalidate_simplecache() {
212 1
	_elgg_services()->simpleCache->invalidate();
213 1
}
214
215
/**
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 * Flush all the registered caches
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 *
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 * @return void
219
 * @since 1.11
220
 */
221
function elgg_flush_caches() {
222 1
	_elgg_services()->hooks->getEvents()->trigger('cache:flush', 'system');
223 1
}
224
225
/**
226
 * Checks if /cache directory has been symlinked to views simplecache directory
227
 *
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 * @return bool
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 * @access private
230
 */
231
function _elgg_is_cache_symlinked() {
232 1
	$root_path = elgg_get_root_path();
233 1
	$cache_path = elgg_get_cache_path();
234
235 1
	$simplecache_path = "{$cache_path}views_simplecache";
236 1
	$symlink_path = "{$root_path}cache";
237
238 1
	if (!is_dir($simplecache_path)) {
239 1
		return false;
240
	}
241 1
	return is_dir($symlink_path) && realpath($simplecache_path) == realpath($symlink_path);
242
}
243
244
/**
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 * Symlinks /cache directory to views simplecache directory
246
 *
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 * @return bool
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 * @access private
249
 */
250
function _elgg_symlink_cache() {
251
252 1
	if (_elgg_is_cache_symlinked()) {
253
		// Symlink exists, no need to proceed
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		return true;
255
	}
256
257 1
	$root_path = elgg_get_root_path();
258 1
	$cache_path = elgg_get_cache_path();
259
260 1
	$simplecache_path = "{$cache_path}views_simplecache";
261 1
	$symlink_path = "{$root_path}cache";
262
263 1
	if (is_dir($symlink_path)) {
264
		// Cache directory already exists
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		// We can not proceed without overwriting files
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		return false;
267
	}
268
269 1
	if (!is_dir($simplecache_path)) {
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		// Views simplecache directory has not yet been created
271 1
		mkdir($simplecache_path, 0700, true);
272
	}
273
274 1
	symlink($simplecache_path, $symlink_path);
275
276 1
	if (_elgg_is_cache_symlinked()) {
277 1
		return true;
278
	}
279
280
	if (is_dir($symlink_path)) {
281
		unlink($symlink_path);
282
	}
283
	
284
	return false;
285
}
286
287
/**
288
 * Initializes the simplecache lastcache variable and creates system cache files
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 * when appropriate.
290
 *
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 * @return void
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 *
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 * @access private
294
 */
295
function _elgg_cache_init() {
296 18
	_elgg_services()->simpleCache->init();
297 18
	_elgg_services()->systemCache->init();
298 18
}
299
300
/**
301
 * @see \Elgg\Application::loadCore Do not do work here. Just register for events.
302
 */
303
return function(\Elgg\EventsService $events, \Elgg\HooksRegistrationService $hooks) {
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The parameter $hooks is not used and could be removed. ( Ignorable by Annotation )

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303
return function(\Elgg\EventsService $events, /** @scrutinizer ignore-unused */ \Elgg\HooksRegistrationService $hooks) {

This check looks for parameters that have been defined for a function or method, but which are not used in the method body.

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304 18
	$events->registerHandler('ready', 'system', '_elgg_cache_init');
305
	
306
	// register plugin hooks for cache reset
307 18
	$events->registerHandler('cache:flush', 'system', 'elgg_reset_system_cache');
308 18
	$events->registerHandler('cache:flush', 'system', 'elgg_invalidate_simplecache');
309
};
310