<?php
/**
 * Copyright © 2008 Bryan Tong Minh <Bryan.TongMinh@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
 */

use MediaWiki\Specials\SpecialEmailUser;
use MediaWiki\Status\Status;
use MediaWiki\User\User;
use Wikimedia\ParamValidator\ParamValidator;

/**
 * API Module to facilitate sending of emails to users
 * @ingroup API
 */
class ApiEmailUser extends ApiBase {

	public function execute() {
		$params = $this->extractRequestParams();

		// Validate target
		$targetUser = SpecialEmailUser::getTarget( $params['target'], $this->getUser() );
		if ( !( $targetUser instanceof User ) ) {
			switch ( $targetUser ) {
				case 'notarget':
					$this->dieWithError( 'apierror-notarget' );
					// dieWithError prevents continuation

				case 'noemail':
					$this->dieWithError( [ 'noemail', $params['target'] ] );
					// dieWithError prevents continuation

				case 'nowikiemail':
					$this->dieWithError( 'nowikiemailtext', 'nowikiemail' );
					// dieWithError prevents continuation

				default:
					$this->dieWithError( [ 'apierror-unknownerror', $targetUser ] );
			}
		}

		// Check permissions and errors
		$error = SpecialEmailUser::getPermissionsError(
			$this->getUser(),
			$params['token'],
			$this->getConfig(),
			true // authorize!
		);
		if ( $error ) {
			$this->dieWithError( $error );
		}

		$data = [
			'Target' => $targetUser->getName(),
			'Text' => $params['text'],
			'Subject' => $params['subject'],
			'CCMe' => $params['ccme'],
		];
		$retval = SpecialEmailUser::submit( $data, $this->getContext() );
		if ( !$retval instanceof Status ) {
			// This is probably the reason
			$retval = Status::newFatal( 'hookaborted' );
		}

		$result = array_filter( [
			'result' => $retval->isGood() ? 'Success' : ( $retval->isOK() ? 'Warnings' : 'Failure' ),
			'warnings' => $this->getErrorFormatter()->arrayFromStatus( $retval, 'warning' ),
			'errors' => $this->getErrorFormatter()->arrayFromStatus( $retval, 'error' ),
		] );

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

	public function mustBePosted() {
		return true;
	}

	public function isWriteMode() {
		return true;
	}

	public function getAllowedParams() {
		return [
			'target' => [
				ParamValidator::PARAM_TYPE => 'string',
				ParamValidator::PARAM_REQUIRED => true
			],
			'subject' => [
				ParamValidator::PARAM_TYPE => 'string',
				ParamValidator::PARAM_REQUIRED => true
			],
			'text' => [
				ParamValidator::PARAM_TYPE => 'text',
				ParamValidator::PARAM_REQUIRED => true
			],
			'ccme' => false,
		];
	}

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

	protected function getExamplesMessages() {
		return [
			'action=emailuser&target=WikiSysop&text=Content&token=123ABC'
				=> 'apihelp-emailuser-example-email',
		];
	}

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