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Edit File: base.php

<?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\feed;

/**
 * Base class with some generic functions and settings.
 */
abstract class base implements feed_interface
{
	/**
	 * Feed helper object
	 * @var \phpbb\feed\helper
	 */
	protected $helper;

/** @var \phpbb\config\config */
	protected $config;

/** @var \phpbb\db\driver\driver_interface */
	protected $db;

/** @var \phpbb\cache\driver\driver_interface */
	protected $cache;

/** @var \phpbb\user */
	protected $user;

/** @var \phpbb\auth\auth */
	protected $auth;

/** @var \phpbb\content_visibility */
	protected $content_visibility;

/** @var \phpbb\event\dispatcher_interface */
	protected $phpbb_dispatcher;

/** @var string */
	protected $phpEx;

/**
	 * SQL Query to be executed to get feed items
	 */
	protected $sql = array();

/**
	 * Keys specified for retrieval of title, content, etc.
	 */
	protected $keys = array();

/**
	 * Number of items to fetch. Usually overwritten by $config['feed_something']
	 */
	protected $num_items = 15;

/**
	 * Separator for title elements to separate items (for example forum / topic)
	 */
	protected $separator = "\xE2\x80\xA2"; // &bull;

/**
	 * Separator for the statistics row (Posted by, post date, replies, etc.)
	 */
	protected $separator_stats = "\xE2\x80\x94"; // &mdash;

/** @var mixed Query result handle */
	protected $result;

/**
	 * Constructor
	 *
	 * @param \phpbb\feed\helper					$helper		Feed helper
	 * @param \phpbb\config\config				$config		Config object
	 * @param \phpbb\db\driver\driver_interface	$db			Database connection
	 * @param \phpbb\cache\driver\driver_interface	$cache	Cache object
	 * @param \phpbb\user						$user		User object
	 * @param \phpbb\auth\auth					$auth		Auth object
	 * @param \phpbb\content_visibility			$content_visibility		Auth object
	 * @param \phpbb\event\dispatcher_interface	$phpbb_dispatcher		Event dispatcher object
	 * @param string								$phpEx		php file extension
	 */
	public function __construct(
		\phpbb\feed\helper $helper,
		\phpbb\config\config $config,
		\phpbb\db\driver\driver_interface $db,
		\phpbb\cache\driver\driver_interface $cache,
		\phpbb\user $user,
		\phpbb\auth\auth $auth,
		\phpbb\content_visibility $content_visibility,
		\phpbb\event\dispatcher_interface $phpbb_dispatcher,
		$phpEx
	)
	{
		$this->config = $config;
		$this->helper = $helper;
		$this->db = $db;
		$this->cache = $cache;
		$this->user = $user;
		$this->auth = $auth;
		$this->content_visibility = $content_visibility;
		$this->phpbb_dispatcher = $phpbb_dispatcher;
		$this->phpEx = $phpEx;

$this->set_keys();

// Allow num_items to be string
		if (is_string($this->num_items))
		{
			$this->num_items = (int) $this->config[$this->num_items];

// A precaution
			if (!$this->num_items)
			{
				$this->num_items = 10;
			}
		}
	}

/**
	 * {@inheritdoc}
	 */
	public function set_keys()
	{
	}

/**
	 * {@inheritdoc}
	 */
	public function open()
	{
	}

/**
	 * {@inheritdoc}
	 */
	public function close()
	{
		if (!empty($this->result))
		{
			$this->db->sql_freeresult($this->result);
		}
	}

/**
	 * {@inheritdoc}
	 */
	public function set($key, $value)
	{
		$this->keys[$key] = $value;
	}

/**
	 * {@inheritdoc}
	 */
	public function get($key)
	{
		return (isset($this->keys[$key])) ? $this->keys[$key] : null;
	}

/**
	 * {@inheritdoc}
	 */
	public function get_item()
	{
		if (!isset($this->result))
		{
			if (!$this->get_sql())
			{
				return false;
			}

$sql_ary = $this->sql;

/**
			 * Event to modify the feed item sql
			 *
			 * @event core.feed_base_modify_item_sql
			 * @var	array	sql_ary		The SQL array to get the feed item data
			 *
			 * @since 3.1.10-RC1
			 */
			$vars = array('sql_ary');
			extract($this->phpbb_dispatcher->trigger_event('core.feed_base_modify_item_sql', compact($vars)));
			$this->sql = $sql_ary;
			unset($sql_ary);

// Query database
			$sql = $this->db->sql_build_query('SELECT', $this->sql);
			$this->result = $this->db->sql_query_limit($sql, $this->num_items);
		}

return $this->db->sql_fetchrow($this->result);
	}

/**
	 * Returns the ids of the forums readable by the current user.
	 *
	 * @return int[]
	 */
	protected function get_readable_forums()
	{
		static $forum_ids;

if (!isset($forum_ids))
		{
			$forum_ids = array_keys($this->auth->acl_getf('f_read', true));
		}

return $forum_ids;
	}

/**
	 * Returns the ids of the forum for which the current user can approve the post in the moderation queue.
	 *
	 * @return int[]
	 */
	protected function get_moderator_approve_forums()
	{
		static $forum_ids;

if (!isset($forum_ids))
		{
			$forum_ids = array_keys($this->auth->acl_getf('m_approve', true));
		}

return $forum_ids;
	}

/**
	 * Returns true if the current user can approve the post of the given forum
	 *
	 * @param int $forum_id Forum id to check
	 * @return bool
	 */
	protected function is_moderator_approve_forum($forum_id)
	{
		static $forum_ids;

if (!isset($forum_ids))
		{
			$forum_ids = array_flip($this->get_moderator_approve_forums());
		}

return (isset($forum_ids[$forum_id])) ? true : false;
	}

/**
	 * Returns the ids of the forum excluded from the feeds
	 *
	 * @return int[]
	 */
	protected function get_excluded_forums()
	{
		static $forum_ids;

// Matches acp/acp_board.php
		$cache_name	= 'feed_excluded_forum_ids';

if (!isset($forum_ids) && ($forum_ids = $this->cache->get('_' . $cache_name)) === false)
		{
			$sql = 'SELECT forum_id
				FROM ' . FORUMS_TABLE . '
				WHERE ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_EXCLUDE, '<> 0');
			$result = $this->db->sql_query($sql);

$forum_ids = array();
			while ($forum_id = (int) $this->db->sql_fetchfield('forum_id'))
			{
				$forum_ids[$forum_id] = $forum_id;
			}
			$this->db->sql_freeresult($result);

$this->cache->put('_' . $cache_name, $forum_ids);
		}

return $forum_ids;
	}

/**
	 * Returns true if the given id is in the excluded forums list.
	 *
	 * @param int $forum_id Id to check
	 * @return bool
	 */
	protected function is_excluded_forum($forum_id)
	{
		$forum_ids = $this->get_excluded_forums();

return isset($forum_ids[$forum_id]) ? true : false;
	}

/**
	 * Returns all password protected forum ids the current user is currently NOT authenticated for.
	 *
	 * @return array     Array of forum ids
	 */
	protected function get_passworded_forums()
	{
		return $this->user->get_passworded_forums();
	}

/**
	 * Returns the link to the user profile.
	 *
	 * @return string
	 */
	protected function user_viewprofile($row)
	{
		$author_id = (int) $row[$this->get('author_id')];

if ($author_id == ANONYMOUS)
		{
			// Since we cannot link to a profile, we just return GUEST
			// instead of $row['username']
			return $this->user->lang['GUEST'];
		}

return '<a href="' . $this->helper->append_sid('memberlist.' . $this->phpEx, 'mode=viewprofile&amp;u=' . $author_id) . '">' . $row[$this->get('creator')] . '</a>';
	}

/**
	 * Returns the SQL query used to retrieve the posts of the feed.
	 *
	 * @return string SQL SELECT query
	 */
	protected abstract function get_sql();
}