<?php

/*
 * Created on July 30, 2007
 *
 * API for MediaWiki 1.8+
 *
 * Copyright (C) 2007 Roan Kattouw <Firstname>.<Lastname>@home.nl
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * http://www.gnu.org/copyleft/gpl.html
 */

if (!defined('MEDIAWIKI')) {
	// Eclipse helper - will be ignored in production
	require_once ('ApiQueryBase.php');
}

/**
 * Query module to get information about a list of users
 *
 * @ingroup API
 */

 class ApiQueryUsers extends ApiQueryBase {

	public function __construct($query, $moduleName) {
		parent :: __construct($query, $moduleName, 'us');
	}

	public function execute() {
		$params = $this->extractRequestParams();
		$result = $this->getResult();
		$r = array();

		if (!is_null($params['prop'])) {
			$this->prop = array_flip($params['prop']);
		} else {
			$this->prop = array();
		}

		if(is_array($params['users'])) {
			$r = $this->getOtherUsersInfo($params['users']);
			$result->setIndexedTagName($r, 'user');
		}
		$result->addValue("query", $this->getModuleName(), $r);
	}

	protected function getOtherUsersInfo($users) {
		$goodNames = $retval = array();
		// Canonicalize user names
		foreach($users as $u) {
			$n = User::getCanonicalName($u);
			if($n === false || $n === '')
				$retval[] = array('name' => $u, 'invalid' => '');
			 else
				$goodNames[] = $n;
		}
		if(!count($goodNames))
			return $retval;

		$db = $this->getDB();
		$this->addTables('user', 'u1');
		$this->addFields('u1.*');
		$this->addWhereFld('u1.user_name', $goodNames);

		if(isset($this->prop['groups'])) {
			$this->addTables('user_groups');
			$this->addJoinConds(array('user_groups' => array('LEFT JOIN', 'ug_user=u1.user_id')));
			$this->addFields('ug_group');
		}
		if(isset($this->prop['blockinfo'])) {
			$this->addTables('ipblocks');
			$this->addTables('user', 'u2');
			$u2 = $this->getAliasedName('user', 'u2');
			$this->addJoinConds(array(
				'ipblocks' => array('LEFT JOIN', 'ipb_user=u1.user_id'),
				$u2 => array('LEFT JOIN', 'ipb_by=u2.user_id')));
			$this->addFields(array('ipb_reason', 'u2.user_name blocker_name'));
		}

		$data = array();
		$res = $this->select(__METHOD__);
		while(($r = $db->fetchObject($res))) {
			$user = User::newFromRow($r);
			$name = $user->getName();
			$data[$name]['name'] = $name;
			if(isset($this->prop['editcount']))
				// No proper member function in User class for this
				$data[$name]['editcount'] = $r->user_editcount;
			if(isset($this->prop['registration']))
				// Nor for this one
				$data[$name]['registration'] = wfTimestampOrNull(TS_ISO_8601, $r->user_registration);
			if(isset($this->prop['groups']))
				// This row contains only one group, others will be added from other rows
				if(!is_null($r->ug_group))
					$data[$name]['groups'][] = $r->ug_group;
			if(isset($this->prop['blockinfo']))
				if(!is_null($r->blocker_name)) {
					$data[$name]['blockedby'] = $r->blocker_name;
					$data[$name]['blockreason'] = $r->ipb_reason;
				}
			if(isset($this->prop['emailable']) && $user->canReceiveEmail())
				$data[$name]['emailable'] = '';
		}

		// Second pass: add result data to $retval
		foreach($goodNames as $u) {
			if(!isset($data[$u]))
				$retval[] = array('name' => $u, 'missing' => '');
			else {
				if(isset($this->prop['groups']) && isset($data[$u]['groups']))
					$this->getResult()->setIndexedTagName($data[$u]['groups'], 'g');
				$retval[] = $data[$u];
			}
		}
		return $retval;
	}

	public function getAllowedParams() {
		return array (
			'prop' => array (
				ApiBase :: PARAM_DFLT => NULL,
				ApiBase :: PARAM_ISMULTI => true,
				ApiBase :: PARAM_TYPE => array (
					'blockinfo',
					'groups',
					'editcount',
					'registration',
					'emailable',
				)
			),
			'users' => array(
				ApiBase :: PARAM_ISMULTI => true
			)
		);
	}

	public function getParamDescription() {
		return array (
			'prop' => array(
				'What pieces of information to include',
				'  blockinfo    - tags if the user is blocked, by whom, and for what reason',
				'  groups       - lists all the groups the user belongs to',
				'  editcount    - adds the user\'s edit count',
				'  registration - adds the user\'s registration timestamp',
				'  emailable    - tags if the user can and wants to receive e-mail through [[Special:Emailuser]]',
			),
			'users' => 'A list of users to obtain the same information for'
		);
	}

	public function getDescription() {
		return 'Get information about a list of users';
	}

	protected function getExamples() {
		return 'api.php?action=query&list=users&ususers=brion|TimStarling&usprop=groups|editcount';
	}

	public function getVersion() {
		return __CLASS__ . ': $Id: ApiQueryUsers.php 44231 2008-12-04 14:42:30Z catrope $';
	}
}
