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File: account_prefs_reset.php
<?php
# MantisBT - a php based bugtracking system

# MantisBT is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# MantisBT is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with MantisBT.  If not, see <http://www.gnu.org/licenses/>.

	/**
	 * CALLERS
	 * This page is called from:
	 * - account_prefs_inc.php
	 *
	 * EXPECTED BEHAVIOUR
	 * - Reset the user's preferences to default values
	 * - Redirect to account_prefs_page.php or another page, if given
	 *
	 * CALLS
	 * This page conditionally redirects upon completion
	 *
	 * RESTRICTIONS & PERMISSIONS
	 * - User must be authenticated
	 *	- User must not be protected
	 *
	 * @package MantisBT
	 * @copyright Copyright (C) 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
	 * @copyright Copyright (C) 2002 - 2011  MantisBT Team - mantisbt-dev@lists.sourceforge.net
	 * @link http://www.mantisbt.org
	 */
	 /**
	  * MantisBT Core API's
	  */
	require_once( 'core.php' );

	require_once( 'user_pref_api.php' );

	#============ Parameters ============
	$f_user_id = gpc_get_int( 'user_id' );
	$f_redirect_url	= string_sanitize_url( gpc_get_string( 'redirect_url', 'account_prefs_page.php' ) );

	#============ Permissions ============
	form_security_validate( 'account_prefs_reset' );

	auth_ensure_user_authenticated();

	user_ensure_exists( $f_user_id );

	$t_user = user_get_row( $f_user_id );

	# This page is currently called from the manage_* namespace and thus we
	# have to allow authorised users to update the accounts of other users.
	# TODO: split this functionality into manage_user_prefs_reset.php
	if ( auth_get_current_user_id() != $f_user_id ) {
		access_ensure_global_level( config_get( 'manage_user_threshold' ) );
		access_ensure_global_level( $t_user['access_level'] );
	} else {
		# Protected users should not be able to update the preferences of their
		# user account. The anonymous user is always considered a protected
		# user and hence will also not be allowed to update preferences.
		user_ensure_unprotected( $f_user_id );
	}

	user_pref_delete( $f_user_id );

	form_security_purge( 'account_prefs_reset' );

	print_header_redirect( $f_redirect_url, true, true );