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| <?php | |
| /** | |
| * | |
| * This file is part of the phpBB Forum Software package. | |
| * | |
| * @copyright (c) phpBB Limited <https://www.phpbb.com> | |
| * @license GNU General Public License, version 2 (GPL-2.0) | |
| * | |
| * For full copyright and license information, please see | |
| * the docs/CREDITS.txt file. | |
| * | |
| */ | |
| namespace phpbb\extension; | |
| /** | |
| * Provides a set of items found in extensions. | |
| * | |
| * This abstract class is essentially a wrapper around item-specific | |
| * finding logic. It handles storing the extension manager via constructor | |
| * for the finding logic to use to find the items, and provides an | |
| * iterator interface over the items found by the finding logic. | |
| * | |
| * Items could be anything, for example template paths or cron task names. | |
| * Derived classes completely define what the items are. | |
| */ | |
| abstract class provider implements \IteratorAggregate | |
| { | |
| /** | |
| * Array holding all found items | |
| * @var array|null | |
| */ | |
| protected $items = null; | |
| /** | |
| * An extension manager to search for items in extensions | |
| * @var \phpbb\extension\manager | |
| */ | |
| protected $extension_manager; | |
| /** | |
| * Constructor. Loads all available items. | |
| * | |
| * @param \phpbb\extension\manager $extension_manager phpBB extension manager | |
| */ | |
| public function __construct(\phpbb\extension\manager $extension_manager) | |
| { | |
| $this->extension_manager = $extension_manager; | |
| } | |
| /** | |
| * Finds items using the extension manager. | |
| * | |
| * @return array List of task names | |
| */ | |
| abstract protected function find(); | |
| /** | |
| * Retrieve an iterator over all items | |
| * | |
| * @return \ArrayIterator An iterator for the array of template paths | |
| */ | |
| public function getIterator() | |
| { | |
| if ($this->items === null) | |
| { | |
| $this->items = $this->find(); | |
| } | |
| return new \ArrayIterator($this->items); | |
| } | |
| } |