/includes/auth.php

<?php
/**
*
* @package Icy Phoenix
* @version $Id$
* @copyright (c) 2008 Icy Phoenix
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/

/**
*
* @Icy Phoenix is based on phpBB
* @copyright (c) 2008 phpBB Group
*
*/

if (!defined('IN_ICYPHOENIX'))
{
	die('Hacking attempt');
}

/*
* $type's accepted (pre-pend with AUTH_):
*
* 01 View,
* 02 Read,
* 03 Post,
* 04 Reply,
* 05 Edit,
* 06 Delete,
* 07 Sticky,
* 08 Announce,
* 09 Global Ann,
* 10 News,
* 11 Calendar,
* 12 Vote,
* 13 Poll,
* 14 Attach,
* 15 Download,
* 16 Warn,
* 17 Unban,
* 18 Report,
* 19 Rate
*
* Possible options ($type/forum_id combinations):
*
* - If you include a type and forum_id then a specific lookup will be done and the single result returned
* - If you set type to AUTH_ALL and specify a forum_id an array of all auth types will be returned
* - If you provide a forum_id a specific lookup on that forum will be done
* - If you set forum_id to AUTH_LIST_ALL and specify a type an array listing the results for all forums will be returned
* - If you set forum_id to AUTH_LIST_ALL and type to AUTH_ALL a multidimensional array containing the auth permissions
* for all types and all forums for that user is returned
*
* All results are returned as associative arrays, even when a single auth type is specified.
*
* If available you can send an array (either one or two dimensional) containing the
* forum auth levels, this will prevent the auth function having to do its own lookup
*/
function auth($type, $forum_id, $userdata, $f_access = '')
{
	global $db, $config, $lang, $tree;

	if (!empty($tree['data']))
	{
		$f_access = array();
		if (!empty($forum_id))
		{
			$idx = $tree['keys'][POST_FORUM_URL . $forum_id];
			$f_access = $tree['data'][$idx];
		}
		else
		{
			for ($i = 0; $i < sizeof($tree['data']); $i++)
			{
				if ($tree['type'][$i] == POST_FORUM_URL)
				{
					$f_access[] = $tree['data'][$i];
				}
			}
		}
	}

	switch($type)
	{
		case AUTH_ALL:
			$a_sql = 'a.auth_view, a.auth_read, a.auth_post, a.auth_reply, a.auth_edit, a.auth_delete, a.auth_sticky, a.auth_announce, a.auth_globalannounce, a.auth_news, a.auth_cal, a.auth_vote, a.auth_pollcreate, a.auth_attachments, a.auth_download, a.auth_ban, a.auth_greencard, a.auth_bluecard, a.auth_rate';
			$auth_fields = array('auth_view', 'auth_read', 'auth_post', 'auth_reply', 'auth_edit', 'auth_delete', 'auth_sticky', 'auth_announce', 'auth_globalannounce', 'auth_news', 'auth_cal', 'auth_vote', 'auth_pollcreate', 'auth_attachments', 'auth_download', 'auth_ban', 'auth_greencard', 'auth_bluecard', 'auth_rate');
			break;
		case AUTH_VIEW:
			$a_sql = 'a.auth_view';
			$auth_fields = array('auth_view');
			break;
		case AUTH_READ:
			$a_sql = 'a.auth_read';
			$auth_fields = array('auth_read');
			break;
		case AUTH_POST:
			$a_sql = 'a.auth_post';
			$auth_fields = array('auth_post');
			break;
		case AUTH_REPLY:
			$a_sql = 'a.auth_reply';
			$auth_fields = array('auth_reply');
			break;
		case AUTH_EDIT:
			$a_sql = 'a.auth_edit';
			$auth_fields = array('auth_edit');
			break;
		case AUTH_DELETE:
			$a_sql = 'a.auth_delete';
			$auth_fields = array('auth_delete');
			break;
		case AUTH_STICKY:
			$a_sql = 'a.auth_sticky';
			$auth_fields = array('auth_sticky');
			break;
		case AUTH_ANNOUNCE:
			$a_sql = 'a.auth_announce';
			$auth_fields = array('auth_announce');
			break;
		case AUTH_GLOBALANNOUNCE:
			$a_sql = 'a.auth_globalannounce';
			$auth_fields = array('auth_globalannounce');
			break;
		case AUTH_NEWS:
			$a_sql = 'a.auth_news';
			$auth_fields = array('auth_news');
			break;
		case AUTH_CAL:
			$a_sql = 'a.auth_cal';
			$auth_fields = array('auth_cal');
			break;
		case AUTH_VOTE:
			$a_sql = 'a.auth_vote';
			$auth_fields = array('auth_vote');
			break;
		case AUTH_POLLCREATE:
			$a_sql = 'a.auth_pollcreate';
			$auth_fields = array('auth_pollcreate');
			break;
		case AUTH_ATTACHMENTS:
			$a_sql = 'a.auth_attachments';
			$auth_fields = array('auth_attachments');
			break;
		case AUTH_DOWNLOAD:
			$a_sql = 'a.auth_download';
			$auth_fields = array('auth_download');
			break;
		case AUTH_BAN:
			$a_sql = 'a.auth_ban';
			$auth_fields = array('auth_ban');
			break;
		case AUTH_GREENCARD:
			$a_sql = 'a.auth_greencard';
			$auth_fields = array('auth_greencard');
			break;
		case AUTH_BLUECARD:
			$a_sql = 'a.auth_bluecard';
			$auth_fields = array('auth_bluecard');
			break;
		case AUTH_RATE:
			$a_sql = 'a.auth_rate';
			$auth_fields = array('auth_rate');
			break;
		default:
			break;
	}

	//
	// If f_access has been passed, or auth is needed to return an array of forums
	// then we need to pull the auth information on the given forum (or all forums)
	//
	if (empty($f_access))
	{
		$forum_match_sql = ($forum_id != AUTH_LIST_ALL) ? "WHERE a.forum_id = $forum_id" : '';

		$sql = "SELECT a.forum_id, $a_sql
			FROM " . FORUMS_TABLE . " a
			$forum_match_sql";
		$result = $db->sql_query($sql);
		$sql_fetchrow = ($forum_id != AUTH_LIST_ALL) ? 'sql_fetchrow' : 'sql_fetchrowset';

		if (!($f_access = $db->$sql_fetchrow($result)))
		{
			$db->sql_freeresult($result);
			return array();
		}
		$db->sql_freeresult($result);
	}

	//
	// If the user isn't logged on then all we need do is check if the forum
	// has the type set to ALL, if yes they are good to go, if not then they are denied access
	//
	$u_access = array();
	if ($userdata['session_logged_in'])
	{
		$forum_match_sql = ($forum_id != AUTH_LIST_ALL) ? "AND a.forum_id = $forum_id" : '';

		$sql = "SELECT a.forum_id, $a_sql, a.auth_mod
			FROM " . AUTH_ACCESS_TABLE . " a, " . USER_GROUP_TABLE . " ug
			WHERE ug.user_id = " . $userdata['user_id'] . "
				AND ug.user_pending = 0
				AND a.group_id = ug.group_id
				$forum_match_sql";
		$result = $db->sql_query($sql, 0, 'auth_');

		if ($row = $db->sql_fetchrow($result))
		{
			do
			{
				if ($forum_id != AUTH_LIST_ALL)
				{
					$u_access[] = $row;
				}
				else
				{
					$u_access[$row['forum_id']][] = $row;
				}
			}
			while($row = $db->sql_fetchrow($result));
		}
		$db->sql_freeresult($result);
	}

	$is_admin = (($userdata['user_level'] == ADMIN) && $userdata['session_logged_in']) ? true : 0;
	//$is_admin = ((($userdata['user_level'] == ADMIN) || ($userdata['user_level'] == JUNIOR_ADMIN)) && $userdata['session_logged_in']) ? true : 0;

	$auth_user = array();
	for($i = 0; $i < sizeof($auth_fields); $i++)
	{
		$key = $auth_fields[$i];

		//
		// If the user is logged on and the forum type is either ALL or REG then the user has access
		//
		// If the type if ACL, MOD or ADMIN then we need to see if the user has specific permissions
		// to do whatever it is they want to do ... to do this we pull relevant information for the
		// user (and any groups they belong to)
		//
		// Now we compare the users access level against the forums. We assume here that a moderator
		// and admin automatically have access to an ACL forum, similarly we assume admins meet an
		// auth requirement of MOD
		//
		if ($forum_id != AUTH_LIST_ALL)
		{
			$value = $f_access[$key];

			switch($value)
			{
				case AUTH_ALL:
					$auth_user[$key] = true;
					$auth_user[$key . '_type'] = $lang['Auth_Anonymous_Users'];
					break;

				case AUTH_REG:
					$auth_user[$key] = ($userdata['session_logged_in']) ? true : 0;
					// Check if the user is a BOT
					$auth_user[$key] = (($config['bots_reg_auth'] == true) && $userdata['is_bot']) ? true : $auth_user[$key];
					$auth_user[$key . '_type'] = $lang['Auth_Registered_Users'];
					break;

				// Self AUTH - BEGIN
				case AUTH_SELF:
					$auth_user[$key] = ($userdata['session_logged_in']) ? ((auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin)) ? true : AUTH_SELF) : 0;
					$auth_user[$key . '_type'] = $lang['Auth_Self_Users'];
					break;
				// Self AUTH - END

				case AUTH_ACL:
					$auth_user[$key] = ($userdata['session_logged_in']) ? auth_check_user(AUTH_ACL, $key, $u_access, $is_admin) : 0;
					$auth_user[$key . '_type'] = $lang['Auth_Users_granted_access'];
					break;

				case AUTH_MOD:
					$auth_user[$key] = ($userdata['session_logged_in']) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
					$auth_user[$key . '_type'] = $lang['Auth_Moderators'];
					break;

				case AUTH_ADMIN:
					$auth_user[$key] = $is_admin;
					$auth_user[$key . '_type'] = $lang['Auth_Administrators'];
					break;

				case AUTH_NONE:
					$auth_user[$key] = 0;
					break;

				default:
					$auth_user[$key] = 0;
					break;
			}
		}
		else
		{
			for($k = 0; $k < sizeof($f_access); $k++)
			{
				$value = $f_access[$k][$key];
				$f_forum_id = $f_access[$k]['forum_id'];
				$u_access[$f_forum_id] = isset($u_access[$f_forum_id]) ? $u_access[$f_forum_id] : array();

				switch($value)
				{
					case AUTH_ALL:
						$auth_user[$f_forum_id][$key] = true;
						$auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Anonymous_Users'];
						break;

					case AUTH_REG:
						$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in']) ? true : 0;
						// Check if the user is a BOT
						$auth_user[$f_forum_id][$key] = (($config['bots_reg_auth'] == true) && $userdata['is_bot']) ? true : $auth_user[$f_forum_id][$key];
						$auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Registered_Users'];
						break;

					// Self AUTH - BEGIN
					case AUTH_SELF:
						$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in']) ? ((auth_check_user(AUTH_MOD, 'auth_mod', $u_access[$f_forum_id], $is_admin)) ? true : AUTH_SELF) : 0;
						$auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Self_Users'];
						break;
					// Self AUTH - END

					case AUTH_ACL:
						$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in']) ? auth_check_user(AUTH_ACL, $key, $u_access[$f_forum_id], $is_admin) : 0;
						$auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Users_granted_access'];
						break;

					case AUTH_MOD:
						$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in']) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access[$f_forum_id], $is_admin) : 0;
						$auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Moderators'];
						break;

					case AUTH_ADMIN:
						$auth_user[$f_forum_id][$key] = $is_admin;
						$auth_user[$f_forum_id][$key . '_type'] = $lang['Auth_Administrators'];
						break;

					case AUTH_NONE:
						$auth_user[$f_forum_id][$key] = 0;
						break;

					default:
						$auth_user[$f_forum_id][$key] = 0;
						break;
				}
			}
		}
	}

	// Is user a moderator?
	if ($forum_id != AUTH_LIST_ALL)
	{
		$auth_user['auth_mod'] = ($userdata['session_logged_in']) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
	}
	else
	{
		for($k = 0; $k < sizeof($f_access); $k++)
		{
			$f_forum_id = $f_access[$k]['forum_id'];
			$u_access[$f_forum_id] = isset($u_access[$f_forum_id]) ? $u_access[$f_forum_id] : array();

			$auth_user[$f_forum_id]['auth_mod'] = ($userdata['session_logged_in']) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access[$f_forum_id], $is_admin) : 0;
		}
	}

	return $auth_user;
}

/*
* Check user auth
*/
function auth_check_user($type, $key, $u_access, $is_admin)
{
	$auth_user = 0;

	if (sizeof($u_access))
	{
		for($j = 0; $j < sizeof($u_access); $j++)
		{
			$result = 0;
			switch($type)
			{
				case AUTH_ACL:
					$result = $u_access[$j][$key];

				case AUTH_MOD:
					$result = $result || $u_access[$j]['auth_mod'];

				case AUTH_ADMIN:
					$result = $result || $is_admin;
					break;
			}

			$auth_user = $auth_user || $result;
		}
	}
	else
	{
		$auth_user = $is_admin;
	}

	return $auth_user;
}

/*
* Check auth level
* Returns true in case the user has the requested level
*/
function check_auth_level($level_required)
{
	global $userdata, $config;

	if ($level_required == AUTH_ALL)
	{
		return true;
	}

	if ($userdata['user_level'] == ADMIN)
	{
		if (($level_required == AUTH_ADMIN) || ($level_required == AUTH_GUEST_ONLY))
		{
			return true;
		}

		if ($level_required == AUTH_FOUNDER)
		{
			$founder_id = (defined('FOUNDER_ID') ? FOUNDER_ID : get_founder_id());
			return ($userdata['user_id'] == $founder_id) ? true : false;
		}
		elseif ($level_required == AUTH_MAIN_ADMIN)
		{
			if (defined('MAIN_ADMINS_ID'))
			{
				$allowed_admins = explode(',', MAIN_ADMINS_ID);
				return (in_array($userdata['user_id'], $allowed_admins)) ? true : false;
			}
		}
	}

	// Before going on... if level_required is for Guests only then check if the user is a guest but not a bot...
	if ($level_required == AUTH_GUEST_ONLY)
	{
		return (!$userdata['is_bot'] && !$userdata['session_logged_in']) ? true : false;
	}

	// Force to AUTH_ADMIN since we already checked all cases for founder or main admins
	if (($level_required == AUTH_FOUNDER) || ($level_required == AUTH_MAIN_ADMIN))
	{
		$level_required = AUTH_ADMIN;
	}

	// Access level required is at least REG and user is not an admin!
	// Remember that Junior Admin has the ADMIN level while not in CMS or ACP
	$not_auth = false;
	// Check if the user is REG or a BOT
	$is_reg = (($config['bots_reg_auth'] && $userdata['is_bot']) || $userdata['session_logged_in']) ? true : false;
	$not_auth = (!$not_auth && ($level_required == AUTH_REG) && !$is_reg) ? true : $not_auth;
	$not_auth = (!$not_auth && ($level_required == AUTH_MOD) && ($userdata['user_level'] != MOD) && ($userdata['user_level'] != ADMIN)) ? true : $not_auth;
	$not_auth = (!$not_auth && ($level_required == AUTH_ADMIN)) ? true : $not_auth;
	if ($not_auth)
	{
		return false;
	}

	return true;
}

/**
* Check if the user is allowed to access a page
*/
function check_page_auth($cms_page_id, $cms_auth_level, $return = false)
{
	global $userdata, $lang;

	$is_auth = check_auth_level($cms_auth_level);

	if (!$is_auth)
	{
		if ($return)
		{
			return false;
		}
		else
		{
			if (!$userdata['is_bot'] && !$userdata['session_logged_in'])
			{
				$page_array = array();
				$page_array = extract_current_page(IP_ROOT_PATH);
				redirect(append_sid(IP_ROOT_PATH . CMS_PAGE_LOGIN . '?redirect=' . str_replace(('.' . PHP_EXT . '?'), ('.' . PHP_EXT . '&'), $page_array['page']), true));
			}
			else
			{
				message_die(GENERAL_MESSAGE, $lang['Not_Auth_View']);
			}
		}
	}

	return true;
}

/**
* Builds a list of forums with no read access
*/
function build_exclusion_forums_list($only_auth_view = true)
{
	global $db, $config, $userdata, $lang, $tree;

	$sql_auth = "SELECT forum_id, parent_id, forum_name, auth_view, auth_read, auth_post FROM " . FORUMS_TABLE;
	$result_auth = $db->sql_query($sql_auth, 0, 'forums_excluded_list_', FORUMS_CACHE_FOLDER);
	$forum_data = array();
	while($row_auth = $db->sql_fetchrow($result_auth))
	{
		$forum_data[] = $row_auth;
	}
	$db->sql_freeresult($result_auth);

	$is_auth_ary = array();
	$is_auth_ary = auth(AUTH_ALL, AUTH_LIST_ALL, $userdata);

	$except_forums = '\'start\'';
	for($f = 0; $f < sizeof($forum_data); $f++)
	{
		$exclude_this = false;

		if((!$is_auth_ary[$forum_data[$f]['forum_id']]['auth_read']) || ((!$is_auth_ary[$forum_data[$f]['forum_id']]['auth_view']) && $only_auth_view))
		{
			$exclude_this = true;
		}

		// SELF AUTH - BEGIN
		// Comment the lines below if you wish to show RESERVED topics for AUTH_SELF.
		if(((($userdata['user_level'] != ADMIN) && ($userdata['user_level'] != MOD)) || (($userdata['user_level'] == MOD) && !$config['allow_mods_view_self'])) && (intval($is_auth_ary[$forum_data[$f]['forum_id']]['auth_read']) == AUTH_SELF))
		{
			$exclude_this = true;
		}
		// SELF AUTH - END

		if ($exclude_this)
		{
			if($except_forums == '\'start\'')
			{
				$except_forums = $forum_data[$f]['forum_id'];
			}
			else
			{
				$except_forums .= ',' . $forum_data[$f]['forum_id'];
			}
		}
	}
	return $except_forums;
}

/**
* Builds a list of forums with read access
*/
function build_allowed_forums_list()
{
	global $db, $config, $userdata, $lang, $tree;

	$sql_auth = "SELECT forum_id, parent_id, forum_name, auth_view, auth_read, auth_post FROM " . FORUMS_TABLE;
	$result_auth = $db->sql_query($sql_auth, 0, 'forums_allowed_list_', FORUMS_CACHE_FOLDER);
	$forum_data = array();
	while($row_auth = $db->sql_fetchrow($result_auth))
	{
		$forum_data[] = $row_auth;
	}
	$db->sql_freeresult($result_auth);

	$is_auth_ary = array();
	$is_auth_ary = auth(AUTH_ALL, AUTH_LIST_ALL, $userdata);

	$allowed_forums = '0';
	for($f = 0; $f < sizeof($forum_data); $f++)
	{
		$include_this = false;

		if($is_auth_ary[$forum_data[$f]['forum_id']]['auth_read'])
		{
			$include_this = true;
		}

		// SELF AUTH - BEGIN
		// Comment the lines below if you wish to show RESERVED topics for AUTH_SELF.
		if(((($userdata['user_level'] != ADMIN) && ($userdata['user_level'] != MOD)) || (($userdata['user_level'] == MOD) && !$config['allow_mods_view_self'])) && (intval($is_auth_ary[$forum_data[$f]['forum_id']]['auth_read']) == AUTH_SELF))
		{
			$include_this = false;
		}
		// SELF AUTH - END

		if ($include_this)
		{
			$allowed_forums .= ', ' . $forum_data[$f]['forum_id'];
		}
	}
	return $allowed_forums;
}

?>