summaryrefslogtreecommitdiffstats
path: root/help-install/ky/main::failsafe.html
diff options
context:
space:
mode:
Diffstat (limited to 'help-install/ky/main::failsafe.html')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.21.0) at 2026-05-03 09:20:41 +0000
id='n75' href='#n75'>75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 
<?php
/**
*
* @package extension
* @copyright (c) 2011 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/

/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
	exit;
}

/**
* The extension manager provides means to activate/deactivate extensions.
*
* @package extension
*/
class phpbb_extension_manager
{
	protected $db;
	protected $config;
	protected $cache;
	protected $php_ext;
	protected $extensions;
	protected $extension_table;
	protected $phpbb_root_path;
	protected $cache_name;

	/**
	* Creates a manager and loads information from database
	*
	* @param phpbb_db_driver $db A database connection
	* @param phpbb_config $config phpbb_config
	* @param string $extension_table The name of the table holding extensions
	* @param string $phpbb_root_path Path to the phpbb includes directory.
	* @param string $php_ext php file extension
	* @param phpbb_cache_driver_interface $cache A cache instance or null
	* @param string $cache_name The name of the cache variable, defaults to _ext
	*/
	public function __construct(phpbb_db_driver $db, phpbb_config $config, $extension_table, $phpbb_root_path, $php_ext = '.php', phpbb_cache_driver_interface $cache = null, $cache_name = '_ext')
	{
		$this->phpbb_root_path = $phpbb_root_path;
		$this->db = $db;
		$this->config = $config;
		$this->cache = $cache;
		$this->php_ext = $php_ext;
		$this->extension_table = $extension_table;
		$this->cache_name = $cache_name;

		$this->extensions = ($this->cache) ? $this->cache->get($this->cache_name) : false;

		if ($this->extensions === false)
		{
			$this->load_extensions();
		}
	}

	/**
	* Loads all extension information from the database
	*
	* @return null
	*/
	public function load_extensions()
	{
		$this->extensions = array();

		// Do not try to load any extensions when installing or updating
		// Note: database updater invokes this code, and in 3.0
		// there is no extension table therefore the rest of this function
		// fails
		if (defined('IN_INSTALL'))
		{
			return;
		}

		$sql = 'SELECT *
			FROM ' . $this->extension_table;

		$result = $this->db->sql_query($sql);
		$extensions = $this->db->sql_fetchrowset($result);
		$this->db->sql_freeresult($result);

		foreach ($extensions as $extension)
		{
			$extension['ext_path'] = $this->get_extension_path($extension['ext_name']);
			$this->extensions[$extension['ext_name']] = $extension;
		}

		ksort($this->extensions);

		if ($this->cache)
		{
			$this->cache->put($this->cache_name, $this->extensions);
		}
	}

	/**
	* Generates the path to an extension
	*
	* @param string $name The name of the extension
	* @param bool $phpbb_relative Whether the path should be relative to phpbb root
	* @return string Path to an extension
	*/
	public function get_extension_path($name, $phpbb_relative = false)
	{
		$name = str_replace('.', '', $name);

		return (($phpbb_relative) ? $this->phpbb_root_path : '') . 'ext/' . $name . '/';
	}

	/**
	* Instantiates the extension meta class for the extension with the given name
	*
	* @param string $name The extension name
	* @return phpbb_extension_interface Instance of the extension meta class or
	*                     phpbb_extension_base if the class does not exist
	*/
	public function get_extension($name)
	{
		$extension_class_name = 'phpbb_ext_' . str_replace('/', '_', $name) . '_ext';

		if (class_exists($extension_class_name))
		{
			return new $extension_class_name;
		}
		else
		{
			return new phpbb_extension_base;
		}
	}

	/**
	* Instantiates the metadata manager for the extension with the given name
	*
	* @param string $name The extension name
	* @param string $template The template manager
	* @return phpbb_extension_metadata_manager Instance of the metadata manager
	*/
	public function create_extension_metadata_manager($name, phpbb_template $template)
	{
		return new phpbb_extension_metadata_manager($name, $this->db, $this, $this->phpbb_root_path, $this->php_ext, $template, $this->config);
	}

	/**
	* Runs a step of the extension enabling process.
	*
	* Allows the exentension to enable in a long running script that works
	* in multiple steps across requests. State is kept for the extension
	* in the extensions table.
	*
	* @param	string	$name	The extension's name
	* @return	bool			False if enabling is finished, true otherwise
	*/
	public function enable_step($name)
	{
		// ignore extensions that are already enabled
		if (isset($this->extensions[$name]) && $this->extensions[$name]['ext_active'])
		{
			return false;
		}

		$old_state = (isset($this->extensions[$name]['ext_state'])) ? unserialize($this->extensions[$name]['ext_state']) : false;

		$extension = $this->get_extension($name);
		$state = $extension->enable_step($old_state);

		$active = ($state === false);

		$extension_data = array(
			'ext_name'		=> $name,
			'ext_active'	=> $active,
			'ext_state'		=> serialize($state),
		);

		$this->extensions[$name] = $extension_data;
		$this->extensions[$name]['ext_path'] = $this->get_extension_path($extension_data['ext_name']);
		ksort($this->extensions);

		$sql = 'UPDATE ' . $this->extension_table . '
			SET ' . $this->db->sql_build_array('UPDATE', $extension_data) . "
			WHERE ext_name = '" . $this->db->sql_escape($name) . "'";
		$this->db->sql_query($sql);

		if (!$this->db->sql_affectedrows())
		{
			$sql = 'INSERT INTO ' . $this->extension_table . '
				' . $this->db->sql_build_array('INSERT', $extension_data);
			$this->db->sql_query($sql);
		}

		if ($this->cache)
		{
			$this->cache->purge();
		}

		return !$active;
	}

	/**
	* Enables an extension
	*
	* This method completely enables an extension. But it could be long running
	* so never call this in a script that has a max_execution time.
	*
	* @param string $name The extension's name
	* @return null
	*/
	public function enable($name)
	{
		while ($this->enable_step($name));
	}

	/**
	* Disables an extension
	*
	* Calls the disable method on the extension's meta class to allow it to
	* process the event.
	*
	* @param string $name The extension's name
	* @return bool False if disabling is finished, true otherwise
	*/
	public function disable_step($name)
	{
		// ignore extensions that are already disabled
		if (!isset($this->extensions[$name]) || !$this->extensions[$name]['ext_active'])
		{
			return false;
		}

		$old_state = unserialize($this->extensions[$name]['ext_state']);

		$extension = $this->get_extension($name);
		$state = $extension->disable_step($old_state);

		// continue until the state is false
		if ($state !== false)
		{
			$extension_data = array(
				'ext_state'		=> serialize($state),
			);
			$this->extensions[$name]['ext_state'] = serialize($state);

			$sql = 'UPDATE ' . $this->extension_table . '
				SET ' . $this->db->sql_build_array('UPDATE', $extension_data) . "
				WHERE ext_name = '" . $this->db->sql_escape($name) . "'";
			$this->db->sql_query($sql);

			if ($this->cache)
			{
				$this->cache->purge();
			}

			return true;
		}

		$extension_data = array(
			'ext_active'	=> false,
			'ext_state'		=> serialize(false),
		);
		$this->extensions[$name]['ext_active'] = false;
		$this->extensions[$name]['ext_state'] = serialize(false);

		$sql = 'UPDATE ' . $this->extension_table . '
			SET ' . $this->db->sql_build_array('UPDATE', $extension_data) . "
			WHERE ext_name = '" . $this->db->sql_escape($name) . "'";
		$this->db->sql_query($sql);

		if ($this->cache)
		{
			$this->cache->purge();
		}

		return false;
	}

	/**
	* Disables an extension
	*
	* Disables an extension completely at once. This process could run for a
	* while so never call this in a script that has a max_execution time.
	*
	* @param string $name The extension's name
	* @return null
	*/
	public function disable($name)
	{
		while ($this->disable_step($name));
	}

	/**
	* Purge an extension
	*
	* Disables the extension first if active, and then calls purge on the
	* extension's meta class to delete the extension's database content.
	*
	* @param string $name The extension's name
	* @return bool False if purging is finished, true otherwise
	*/
	public function purge_step($name)
	{
		// ignore extensions that do not exist
		if (!isset($this->extensions[$name]))
		{
			return false;
		}

		// disable first if necessary
		if ($this->extensions[$name]['ext_active'])
		{
			$this->disable($name);
		}

		$old_state = unserialize($this->extensions[$name]['ext_state']);

		$extension = $this->get_extension($name);
		$state = $extension->purge_step($old_state);

		// continue until the state is false
		if ($state !== false)
		{
			$extension_data = array(
				'ext_state'		=> serialize($state),
			);
			$this->extensions[$name]['ext_state'] = serialize($state);

			$sql = 'UPDATE ' . $this->extension_table . '
				SET ' . $this->db->sql_build_array('UPDATE', $extension_data) . "
				WHERE ext_name = '" . $this->db->sql_escape($name) . "'";
			$this->db->sql_query($sql);

			if ($this->cache)
			{
				$this->cache->purge();
			}

			return true;
		}

		unset($this->extensions[$name]);

		$sql = 'DELETE FROM ' . $this->extension_table . "
			WHERE ext_name = '" . $this->db->sql_escape($name) . "'";
		$this->db->sql_query($sql);

		if ($this->cache)
		{
			$this->cache->purge();
		}

		return false;
	}

	/**
	* Purge an extension
	*
	* Purges an extension completely at once. This process could run for a while
	* so never call this in a script that has a max_execution time.
	*
	* @param string $name The extension's name
	* @return null
	*/
	public function purge($name)
	{
		while ($this->purge_step($name));
	}

	/**
	* Retrieves a list of all available extensions on the filesystem
	*
	* @return array An array with extension names as keys and paths to the
	*               extension as values
	*/
	public function all_available()
	{
		$available = array();
		if (!is_dir($this->phpbb_root_path . 'ext/'))
		{
			return $available;
		}

		$iterator = new RecursiveIteratorIterator(
			new RecursiveDirectoryIterator($this->phpbb_root_path . 'ext/', FilesystemIterator::NEW_CURRENT_AND_KEY | FilesystemIterator::FOLLOW_SYMLINKS),
			RecursiveIteratorIterator::SELF_FIRST);
		foreach ($iterator as $file_info)
		{
			if ($file_info->isFile() && $file_info->getFilename() == 'ext' . $this->php_ext)
			{
				$ext_name = $iterator->getInnerIterator()->getSubPath();

				$ext_name = str_replace(DIRECTORY_SEPARATOR, '/', $ext_name);

				$available[$ext_name] = $this->phpbb_root_path . 'ext/' . $ext_name . '/';
			}
		}
		ksort($available);
		return $available;
	}

	/**
	* Retrieves all configured extensions.
	*
	* All enabled and disabled extensions are considered configured. A purged
	* extension that is no longer in the database is not configured.
	*
	* @return array An array with extension names as keys and and the