<?php
/**
 * 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
 */

use MediaWiki\Block\AbstractBlock;
use MediaWiki\Block\Block;
use MediaWiki\Block\CompositeBlock;
use MediaWiki\Block\DatabaseBlock;
use MediaWiki\Block\SystemBlock;
use MediaWiki\User\User;
use MediaWiki\Utils\MWTimestamp;

/**
 * @ingroup API
 */
trait ApiBlockInfoTrait {

	/**
	 * Get basic info about a given block
	 * @param Block $block
	 * @param Language|null $language
	 * @return array Array containing several keys:
	 *  - blockid - ID of the block
	 *  - blockedby - username of the blocker
	 *  - blockedbyid - user ID of the blocker
	 *  - blockreason - reason provided for the block
	 *  - blockedtimestamp - timestamp for when the block was placed/modified
	 *  - blockedtimestampformatted - blockedtimestamp, formatted for the current locale
	 *  - blockexpiry - expiry time of the block
	 *  - blockexpiryformatted - blockexpiry formatted for the current locale, omitted if infinite
	 *  - blockexpiryrelative - relative time to blockexpiry (e.g. 'in 5 days'), omitted if infinite
	 *  - blockpartial - block only applies to certain pages, namespaces and/or actions
	 *  - systemblocktype - system block type, if any
	 *  - blockcomponents - If the block is a composite block, this will be an array of block
	 *    info arrays
	 */
	private function getBlockDetails(
		Block $block,
		$language = null
	) {
		$language ??= $this->getLanguage();

		$blocker = $block->getBlocker();

		$vals = [];
		$vals['blockid'] = $block->getId();
		$vals['blockedby'] = $blocker ? $blocker->getName() : '';
		$vals['blockedbyid'] = $blocker ? $blocker->getId() : 0;
		$vals['blockreason'] = $block->getReasonComment()
			->message->inLanguage( $language )->plain();
		$vals['blockedtimestamp'] = wfTimestamp( TS_ISO_8601, $block->getTimestamp() );
		$expiry = ApiResult::formatExpiry( $block->getExpiry(), 'infinite' );
		$vals['blockexpiry'] = $expiry;
		$vals['blockpartial'] = !$block->isSitewide();
		$vals['blocknocreate'] = $block->isCreateAccountBlocked();
		$vals['blockanononly'] = !$block->isHardblock();
		if ( $block instanceof AbstractBlock ) {
			$vals['blockemail'] = $block->isEmailBlocked();
			$vals['blockowntalk'] = !$block->isUsertalkEditAllowed();
		}

		$user = $this->getUser();
		// Formatted timestamps
		$vals['blockedtimestampformatted'] = $language->formatExpiry(
			$block->getTimestamp(), true, 'infinity', $user
		);
		if ( $expiry !== 'infinite' ) {
			$vals['blockexpiryformatted'] = $language->formatExpiry(
				$expiry, true, 'infinity', $user
			);
			$vals['blockexpiryrelative'] = $language->getHumanTimestamp(
				new MWTimestamp( $expiry ), new MWTimestamp(), $user
			);
		}

		if ( $block instanceof SystemBlock ) {
			$vals['systemblocktype'] = $block->getSystemBlockType();
		}

		if ( $block instanceof CompositeBlock ) {
			$components = [];
			foreach ( $block->getOriginalBlocks() as $singleBlock ) {
				$components[] = $this->getBlockDetails( $singleBlock, $language );
			}
			$vals['blockcomponents'] = $components;
		}

		return $vals;
	}

	/**
	 * Get the API error code, to be used in ApiMessage::create or ApiBase::dieWithError
	 * @param Block $block
	 * @return string
	 */
	private function getBlockCode( Block $block ): string {
		if ( $block instanceof DatabaseBlock && $block->getType() === Block::TYPE_AUTO ) {
			return 'autoblocked';
		}
		return 'blocked';
	}

	// region   Methods required from ApiBase
	/** @name   Methods required from ApiBase
	 * @{
	 */

	/**
	 * @see IContextSource::getLanguage
	 * @return Language
	 */
	abstract public function getLanguage();

	/**
	 * @see IContextSource::getUser
	 * @return User
	 */
	abstract public function getUser();

	/** @} */
	// endregion -- end of methods required from ApiBase

}
