<?php
/**
 * Copyright © 2007 Roan Kattouw <roan.kattouw@gmail.com>
 *
 * @license GPL-2.0-or-later
 * @file
 */

namespace MediaWiki\Api;

use MediaWiki\Block\Block;
use MediaWiki\Block\BlockPermissionCheckerFactory;
use MediaWiki\Block\BlockTargetFactory;
use MediaWiki\Block\DatabaseBlockStore;
use MediaWiki\Block\UnblockUserFactory;
use MediaWiki\MainConfigNames;
use MediaWiki\ParamValidator\TypeDef\UserDef;
use MediaWiki\Title\Title;
use MediaWiki\User\Options\UserOptionsLookup;
use MediaWiki\User\UserIdentityLookup;
use MediaWiki\Watchlist\WatchedItemStoreInterface;
use MediaWiki\Watchlist\WatchlistManager;
use RuntimeException;
use Wikimedia\ParamValidator\ParamValidator;
use Wikimedia\ParamValidator\TypeDef\ExpiryDef;

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

	use ApiBlockInfoTrait;
	use ApiWatchlistTrait;

	private BlockPermissionCheckerFactory $permissionCheckerFactory;
	private UnblockUserFactory $unblockUserFactory;
	private UserIdentityLookup $userIdentityLookup;
	private WatchedItemStoreInterface $watchedItemStore;
	private DatabaseBlockStore $blockStore;
	private BlockTargetFactory $blockTargetFactory;

	public function __construct(
		ApiMain $main,
		string $action,
		BlockPermissionCheckerFactory $permissionCheckerFactory,
		UnblockUserFactory $unblockUserFactory,
		UserIdentityLookup $userIdentityLookup,
		WatchedItemStoreInterface $watchedItemStore,
		WatchlistManager $watchlistManager,
		UserOptionsLookup $userOptionsLookup,
		DatabaseBlockStore $blockStore,
		BlockTargetFactory $blockTargetFactory
	) {
		parent::__construct( $main, $action );

		$this->permissionCheckerFactory = $permissionCheckerFactory;
		$this->unblockUserFactory = $unblockUserFactory;
		$this->userIdentityLookup = $userIdentityLookup;
		$this->watchedItemStore = $watchedItemStore;

		// Variables needed in ApiWatchlistTrait trait
		$this->watchlistExpiryEnabled = $this->getConfig()->get( MainConfigNames::WatchlistExpiry );
		$this->watchlistMaxDuration =
			$this->getConfig()->get( MainConfigNames::WatchlistExpiryMaxDuration );
		$this->watchlistManager = $watchlistManager;
		$this->userOptionsLookup = $userOptionsLookup;
		$this->blockStore = $blockStore;
		$this->blockTargetFactory = $blockTargetFactory;
	}

	/**
	 * Unblocks the specified user or provides the reason the unblock failed.
	 */
	public function execute() {
		$performer = $this->getUser();
		$params = $this->extractRequestParams();

		$this->requireOnlyOneParameter( $params, 'id', 'user', 'userid' );

		if ( !$this->getAuthority()->isAllowed( 'block' ) ) {
			$this->dieWithError( 'apierror-permissiondenied-unblock', 'permissiondenied' );
		}

		if ( $params['userid'] !== null ) {
			$identity = $this->userIdentityLookup->getUserIdentityByUserId( $params['userid'] );
			if ( !$identity ) {
				$this->dieWithError( [ 'apierror-nosuchuserid', $params['userid'] ], 'nosuchuserid' );
			}
			$params['user'] = $identity;
		}

		$blockToRemove = null;
		if ( $params['id'] !== null ) {
			$blockToRemove = $this->blockStore->newFromID( $params['id'], true );
			if ( !$blockToRemove ) {
				$this->dieWithError(
					[ 'apierror-nosuchblockid', $params['id'] ],
					'nosuchblockid' );
			}
			$target = $blockToRemove->getRedactedTarget();
			if ( !$target ) {
				throw new RuntimeException( 'Block has no target' );
			}
		} else {
			$target = $this->blockTargetFactory->newFromUser( $params['user'] );
		}

		# T17810: blocked admins should have limited access here
		$status = $this->permissionCheckerFactory
			->newChecker(
				$this->getAuthority()
			)->checkBlockPermissions( $target );

		if ( $status !== true ) {
			$this->dieWithError(
				$status,
				null,
				// @phan-suppress-next-line PhanTypeMismatchArgumentNullable Block is checked and not null
				[ 'blockinfo' => $this->getBlockDetails( $performer->getBlock() ) ]
			);
		}

		if ( $blockToRemove !== null ) {
			$status = $this->unblockUserFactory->newRemoveBlock(
				$blockToRemove,
				$this->getAuthority(),
				$params['reason'],
				$params['tags'] ?? []
			)->unblock();
		} else {
			$status = $this->unblockUserFactory->newUnblockUser(
				$target,
				$this->getAuthority(),
				$params['reason'],
				$params['tags'] ?? []
			)->unblock();
		}

		if ( !$status->isOK() ) {
			$this->dieStatus( $status );
		}

		$block = $status->getValue();
		$targetType = $block->getType();
		$targetName = $targetType === Block::TYPE_AUTO ? '' : $block->getTargetName();
		$targetUserId = $block->getTargetUserIdentity() ? $block->getTargetUserIdentity()->getId() : 0;

		$userPage = Title::makeTitle( NS_USER, $targetName );
		$watchlistExpiry = $this->getExpiryFromParams( $params, $userPage, $this->getUser() );
		$watchuser = $params['watchuser'];
		if ( $watchuser && $targetType !== Block::TYPE_RANGE && $targetType !== Block::TYPE_AUTO ) {
			$this->setWatch( 'watch', $userPage, $this->getUser(), null, $watchlistExpiry );
		} else {
			$watchuser = false;
			$watchlistExpiry = null;
		}

		$res = [
			'id' => $block->getId(),
			'user' => $targetName,
			'userid' => $targetUserId,
			'reason' => $params['reason'],
			'watchuser' => $watchuser,
		];

		if ( $watchlistExpiry !== null ) {
			$res['watchlistexpiry'] = $this->getWatchlistExpiry(
				$this->watchedItemStore,
				$userPage,
				$this->getUser()
			);
		}

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

	/** @inheritDoc */
	public function mustBePosted() {
		return true;
	}

	/** @inheritDoc */
	public function isWriteMode() {
		return true;
	}

	/** @inheritDoc */
	public function getAllowedParams() {
		$params = [
			'id' => [
				ParamValidator::PARAM_TYPE => 'integer',
			],
			'user' => [
				ParamValidator::PARAM_TYPE => 'user',
				UserDef::PARAM_ALLOWED_USER_TYPES => [ 'name', 'ip', 'temp', 'cidr', 'id' ],
				UserDef::PARAM_RETURN_OBJECT => true,
			],
			'userid' => [
				ParamValidator::PARAM_TYPE => 'integer',
				ParamValidator::PARAM_DEPRECATED => true,
			],
			'reason' => '',
			'tags' => [
				ParamValidator::PARAM_TYPE => 'tags',
				ParamValidator::PARAM_ISMULTI => true,
			],
			'watchuser' => false,
		];

		// Params appear in the docs in the order they are defined,
		// which is why this is here and not at the bottom.
		// @todo Find better way to support insertion at arbitrary position
		if ( $this->watchlistExpiryEnabled ) {
			$params += [
				'watchlistexpiry' => [
					ParamValidator::PARAM_TYPE => 'expiry',
					ExpiryDef::PARAM_MAX => $this->watchlistMaxDuration,
					ExpiryDef::PARAM_USE_MAX => true,
				]
			];
		}

		return $params;
	}

	/** @inheritDoc */
	public function needsToken() {
		return 'csrf';
	}

	/** @inheritDoc */
	protected function getExamplesMessages() {
		return [
			'action=unblock&id=105'
				=> 'apihelp-unblock-example-id',
			'action=unblock&user=Bob&reason=Sorry%20Bob'
				=> 'apihelp-unblock-example-user',
		];
	}

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

/** @deprecated class alias since 1.43 */
class_alias( ApiUnblock::class, 'ApiUnblock' );