<?php
/**
 *
 *
 * Created on Sep 4, 2007
 *
 * Copyright © 2007 Roan Kattouw "<Firstname>.<Lastname>@gmail.com"
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

/**
 * API module that facilitates the blocking of users. Requires API write mode
 * to be enabled.
 *
 * @ingroup API
 */
class ApiBlock extends ApiBase {

	/**
	 * Blocks the user specified in the parameters for the given expiry, with the
	 * given reason, and with all other settings provided in the params. If the block
	 * succeeds, produces a result containing the details of the block and notice
	 * of success. If it fails, the result will specify the nature of the error.
	 */
	public function execute() {
		$user = $this->getUser();
		$params = $this->extractRequestParams();

		if ( !$user->isAllowed( 'block' ) ) {
			$this->dieUsageMsg( 'cantblock' );
		}

		# bug 15810: blocked admins should have limited access here
		if ( $user->isBlocked() ) {
			$status = SpecialBlock::checkUnblockSelf( $params['user'], $user );
			if ( $status !== true ) {
				$this->dieUsageMsg( array( $status ) );
			}
		}

		$target = User::newFromName( $params['user'] );
		// Bug 38633 - if the target is a user (not an IP address), but it
		// doesn't exist or is unusable, error.
		if ( $target instanceof User &&
			( $target->isAnon() /* doesn't exist */ || !User::isUsableName( $target->getName() ) )
		) {
			$this->dieUsageMsg( array( 'nosuchuser', $params['user'] ) );
		}

		if ( $params['hidename'] && !$user->isAllowed( 'hideuser' ) ) {
			$this->dieUsageMsg( 'canthide' );
		}
		if ( $params['noemail'] && !SpecialBlock::canBlockEmail( $user ) ) {
			$this->dieUsageMsg( 'cantblock-email' );
		}

		$data = array(
			'PreviousTarget' => $params['user'],
			'Target' => $params['user'],
			'Reason' => array(
				$params['reason'],
				'other',
				$params['reason']
			),
			'Expiry' => $params['expiry'] == 'never' ? 'infinite' : $params['expiry'],
			'HardBlock' => !$params['anononly'],
			'CreateAccount' => $params['nocreate'],
			'AutoBlock' => $params['autoblock'],
			'DisableEmail' => $params['noemail'],
			'HideUser' => $params['hidename'],
			'DisableUTEdit' => !$params['allowusertalk'],
			'Reblock' => $params['reblock'],
			'Watch' => $params['watchuser'],
			'Confirm' => true,
		);

		$retval = SpecialBlock::processForm( $data, $this->getContext() );
		if ( $retval !== true ) {
			// We don't care about multiple errors, just report one of them
			$this->dieUsageMsg( $retval );
		}

		list( $target, /*...*/ ) = SpecialBlock::getTargetAndType( $params['user'] );
		$res['user'] = $params['user'];
		$res['userID'] = $target instanceof User ? $target->getId() : 0;

		$block = Block::newFromTarget( $target );
		if ( $block instanceof Block ) {
			$res['expiry'] = $block->mExpiry == $this->getDB()->getInfinity()
				? 'infinite'
				: wfTimestamp( TS_ISO_8601, $block->mExpiry );
			$res['id'] = $block->getId();
		} else {
			# should be unreachable
			$res['expiry'] = '';
			$res['id'] = '';
		}

		$res['reason'] = $params['reason'];
		if ( $params['anononly'] ) {
			$res['anononly'] = '';
		}
		if ( $params['nocreate'] ) {
			$res['nocreate'] = '';
		}
		if ( $params['autoblock'] ) {
			$res['autoblock'] = '';
		}
		if ( $params['noemail'] ) {
			$res['noemail'] = '';
		}
		if ( $params['hidename'] ) {
			$res['hidename'] = '';
		}
		if ( $params['allowusertalk'] ) {
			$res['allowusertalk'] = '';
		}
		if ( $params['watchuser'] ) {
			$res['watchuser'] = '';
		}

		$this->getResult()->addValue( null, $this->getModuleName(), $res );
	}

	public function mustBePosted() {
		return true;
	}

	public function isWriteMode() {
		return true;
	}

	public function getAllowedParams() {
		return array(
			'user' => array(
				ApiBase::PARAM_TYPE => 'string',
				ApiBase::PARAM_REQUIRED => true
			),
			'expiry' => 'never',
			'reason' => '',
			'anononly' => false,
			'nocreate' => false,
			'autoblock' => false,
			'noemail' => false,
			'hidename' => false,
			'allowusertalk' => false,
			'reblock' => false,
			'watchuser' => false,
		);
	}

	public function getParamDescription() {
		return array(
			'user' => 'Username, IP address or IP range you want to block',
			'expiry' => 'Relative expiry time, e.g. \'5 months\' or \'2 weeks\'. ' .
				'If set to \'infinite\', \'indefinite\' or \'never\', the block will never expire.',
			'reason' => 'Reason for block',
			'anononly' => 'Block anonymous users only (i.e. disable anonymous edits for this IP)',
			'nocreate' => 'Prevent account creation',
			'autoblock' => 'Automatically block the last used IP address, and ' .
				'any subsequent IP addresses they try to login from',
			'noemail'
				=> 'Prevent user from sending email through the wiki. (Requires the "blockemail" right.)',
			'hidename' => 'Hide the username from the block log. (Requires the "hideuser" right.)',
			'allowusertalk'
				=> 'Allow the user to edit their own talk page (depends on $wgBlockAllowsUTEdit)',
			'reblock' => 'If the user is already blocked, overwrite the existing block',
			'watchuser' => 'Watch the user/IP\'s user and talk pages',
		);
	}

	public function getDescription() {
		return 'Block a user.';
	}

	public function needsToken() {
		return 'csrf';
	}

	public function getExamples() {
		return array(
			'api.php?action=block&user=123.5.5.12&expiry=3%20days&reason=First%20strike&token=123ABC',
			'api.php?action=block&user=Vandal&expiry=never&reason=Vandalism&nocreate=&autoblock=&noemail=&token=123ABC'
		);
	}

	public function getHelpUrls() {
		return 'https://www.mediawiki.org/wiki/API:Block';
	}
}