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<?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/>.

/**
 * XMLHttpRequest API
 *
 * @package CoreAPI
 * @subpackage XMLHttpRequestAPI
 * @copyright Copyright 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
 * @copyright Copyright 2002  MantisBT Team - mantisbt-dev@lists.sourceforge.net
 * @link http://www.mantisbt.org
 *
 * @uses access_api.php
 * @uses bug_api.php
 * @uses config_api.php
 * @uses constant_inc.php
 * @uses gpc_api.php
 * @uses print_api.php
 * @uses profile_api.php
 */

require_api( 'access_api.php' );
require_api( 'bug_api.php' );
require_api( 'config_api.php' );
require_api( 'constant_inc.php' );
require_api( 'gpc_api.php' );
require_api( 'print_api.php' );
require_api( 'profile_api.php' );

/**
 * Filter a set of strings by finding strings that start with a case-insensitive prefix.
 * @param array  $p_set    An array of strings to search through.
 * @param string $p_prefix The prefix to filter by.
 * @return array An array of strings which match the supplied prefix.
 */
function xmlhttprequest_filter_by_prefix( array $p_set, $p_prefix ) {
	$t_matches = array();
	foreach ( $p_set as $p_item ) {
		if( utf8_strtolower( utf8_substr( $p_item, 0, utf8_strlen( $p_prefix ) ) ) === utf8_strtolower( $p_prefix ) ) {
			$t_matches[] = $p_item;
		}
	}
	return $t_matches;
}

/**
 * Outputs a serialized list of platforms starting with the prefix specified in the $_POST
 * @return void
 * @access public
 */
function xmlhttprequest_platform_get_with_prefix() {
	$f_platform = gpc_get_string( 'platform' );

	$t_unique_entries = profile_get_field_all_for_user( 'platform' );
	$t_matching_entries = xmlhttprequest_filter_by_prefix( $t_unique_entries, $f_platform );

	echo json_encode( $t_matching_entries );
}

/**
 * Outputs a serialized list of Operating Systems starting with the prefix specified in the $_POST
 * @return void
 * @access public
 */
function xmlhttprequest_os_get_with_prefix() {
	$f_os = gpc_get_string( 'os' );

	$t_unique_entries = profile_get_field_all_for_user( 'os' );
	$t_matching_entries = xmlhttprequest_filter_by_prefix( $t_unique_entries, $f_os );

	echo json_encode( $t_matching_entries );
}

/**
 * Outputs a serialized list of Operating System Versions starting with the prefix specified in the $_POST
 * @return void
 * @access public
 */
function xmlhttprequest_os_build_get_with_prefix() {
	$f_os_build = gpc_get_string( 'os_build' );

	$t_unique_entries = profile_get_field_all_for_user( 'os_build' );
	$t_matching_entries = xmlhttprequest_filter_by_prefix( $t_unique_entries, $f_os_build );

	echo json_encode( $t_matching_entries );
}