<?php

/*
 * Created on Mar 29, 2009
 *
 * AbuseFilter extension
 *
 * Copyright (C) 2008 Alex Z. mrzmanwiki AT gmail DOT com
 * Based mostly on code by Bryan Tong Minh and Roan Kattouw
 *
 * 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
 */

/**
 * Query module to list abuse filter details.
 *
 * @ingroup API
 * @ingroup Extensions
 */
class ApiQueryAbuseFilters extends ApiQueryBase {

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

	public function execute() {
		global $wgUser;
		if(!$wgUser->isAllowed('abusefilter-view'))
			$this->dieUsage('You don\'t have permission to view abuse filters', 'permissiondenied');
			
		$params = $this->extractRequestParams();

		$prop = array_flip($params['prop']);
		$fld_id = isset($prop['id']);
		$fld_desc = isset($prop['description']);
		$fld_pattern = isset($prop['pattern']);
		$fld_actions = isset($prop['actions']);
		$fld_hits = isset($prop['hits']);
		$fld_comments = isset($prop['comments']);
		$fld_user = isset($prop['lasteditor']);
		$fld_time = isset($prop['lastedittime']);
		$fld_status = isset($prop['status']);
		$fld_private = isset($prop['private']);
		
		$result = $this->getResult();

		$this->addTables('abuse_filter');
		
		$this->addFields('af_id');
		$this->addFields('af_hidden');
		$this->addFieldsIf('af_hit_count', $fld_hits);
		$this->addFieldsIf('af_enabled', $fld_status);
		$this->addFieldsIf('af_deleted', $fld_status);
		$this->addFieldsIf('af_public_comments', $fld_desc);
		$this->addFieldsIf('af_pattern', $fld_pattern);
		$this->addFieldsIf('af_actions', $fld_actions);
		$this->addFieldsIf('af_comments', $fld_comments);
		$this->addFieldsIf('af_user_text', $fld_user);
		$this->addFieldsIf('af_timestamp', $fld_time);

		$this->addOption('LIMIT', $params['limit'] + 1);
		
		$this->addWhereRange('af_id', $params['dir'], $params['startid'], $params['endid']);
		
		if (!is_null($params['show'])) {		
			$show = array_flip($params['show']);
			
			/* Check for conflicting parameters. */
			if ((isset ($show['enabled']) && isset ($show['!enabled']))
					|| (isset ($show['deleted']) && isset ($show['!deleted']))
					|| (isset ($show['private']) && isset ($show['!private']))) {
					$this->dieUsage("Incorrect parameter - mutually exclusive values may not be supplied", 'show');
			}
			
			$this->addWhereIf('af_enabled = 0', isset ($show['!enabled']));
			$this->addWhereIf('af_enabled != 0', isset ($show['enabled']));
			$this->addWhereIf('af_deleted = 0', isset ($show['!deleted']));
			$this->addWhereIf('af_deleted != 0', isset ($show['deleted']));
			$this->addWhereIf('af_hidden = 0', isset ($show['!private']));
			$this->addWhereIf('af_hidden != 0', isset ($show['private']));
		}
		
		$res = $this->select(__METHOD__);

		$showhidden = $wgUser->isAllowed('abusefilter-modify');
		
		$count = 0;
		while($row = $res->fetchObject())
		{
			if(++$count > $params['limit'])
			{
				// We've had enough
				$this->setContinueEnumParameter('startid', $row->af_id);
				break;
			}
			$entry = array();
			if($fld_id)
				$entry['id'] = intval($row->af_id);
			if($fld_desc)
				$entry['description'] = $row->af_public_comments;
			if($fld_pattern && (!$row->af_hidden || $showhidden))
				$entry['pattern'] = $row->af_pattern;
			if($fld_actions)
				$entry['actions'] = $row->af_actions;
			if($fld_hits)
				$entry['hits'] = intval($row->af_hit_count);
			if($fld_comments && (!$row->af_hidden || $showhidden))
				$entry['comments'] = $row->af_comments;
			if($fld_user)
				$entry['lasteditor'] = $row->af_user_text;
			if($fld_time)
				$entry['lastedittime'] = wfTimestamp(TS_ISO_8601, $row->af_timestamp);
			if($fld_private && $row->af_hidden)
				$entry['private'] = '';
			if($fld_status) {
				if($row->af_enabled)
					$entry['enabled'] = '';
				if($row->af_deleted)
					$entry['deleted'] = '';
			}
			if ($entry) {
				$fit = $result->addValue(array('query', $this->getModuleName()), null, $entry);
				if(!$fit) {
					$this->setContinueEnumParameter('startid', $row->af_id);
					break;
				}
			}
		}
		$result->setIndexedTagName_internal(array('query', $this->getModuleName()), 'filter');
	}

	public function getAllowedParams() {
		return array (
			'startid' => array(
				ApiBase :: PARAM_TYPE => 'integer'
			),
			'endid' => array(
				ApiBase :: PARAM_TYPE => 'integer',
			),
			'dir' => array(
				ApiBase :: PARAM_TYPE => array(
					'older',
					'newer'
				),
				ApiBase :: PARAM_DFLT => 'newer'
			),
			'show' => array(
				ApiBase :: PARAM_ISMULTI => true,
				ApiBase :: PARAM_TYPE => array (
					'enabled',
					'!enabled',
					'deleted',
					'!deleted',
					'private',
					'!private',
				),
			),
			'limit' => array(
				ApiBase :: PARAM_DFLT => 10,
				ApiBase :: PARAM_TYPE => 'limit',
				ApiBase :: PARAM_MIN => 1,
				ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
				ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
			),
			'prop' => array(
				ApiBase :: PARAM_DFLT => 'id|description|actions|status',
				ApiBase :: PARAM_TYPE => array(
						'id',
						'description',
						'pattern',
						'actions',
						'hits',
						'comments',
						'lasteditor',
						'lastedittime',
						'status',
						'private',
					),
				ApiBase :: PARAM_ISMULTI => true
			)
		);
	}	
	
	public function getParamDescription() {
		return array (
			'startid' => 'The filter id to start enumerating from',
			'endid' => 'The filter id to stop enumerating at',
			'dir' => 'The direction in which to enumerate',
			'show' => 'Show only filters which meet these criteria',
			'limit' => 'The maximum number of filters to list',
			'prop' => 'Which properties to get',
		);
	}

	public function getDescription() {
		return 'Show details of the abuse filters.';
	}

	protected function getExamples() {
		return array('api.php?action=query&list=abusefilters&abfshow=enabled|!private',
			'api.php?action=query&list=abusefilters&abfprop=id|description|pattern'
		);
	}

	public function getVersion() {
		return __CLASS__ . ': $Id$';
	}
}