<?php

declare(strict_types=1);

/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Joas Schilling <coding@schilljs.com>
 * @author Lukas Reschke <lukas@statuscode.ch>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Roeland Jago Douma <roeland@famdouma.nl>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program. If not, see <http://www.gnu.org/licenses/>
 *
 */
namespace OCP\Mail;

/**
 * Class IMailer provides some basic functions to create a mail message that can be used in combination with
 * \OC\Mail\Message.
 *
 * Example usage:
 *
 * 	$mailer = \OC::$server->getMailer();
 * 	$message = $mailer->createMessage();
 * 	$message->setSubject('Your Subject');
 * 	$message->setFrom(['cloud@domain.org' => 'Nextcloud Notifier']);
 * 	$message->setTo(['recipient@domain.org' => 'Recipient']);
 * 	$message->setPlainBody('The message text');
 * 	$message->setHtmlBody('The <strong>message</strong> text');
 * 	$mailer->send($message);
 *
 * This message can then be passed to send() of \OC\Mail\Mailer
 *
 * @since 8.1.0
 */
interface IMailer {
	/**
	 * Creates a new message object that can be passed to send()
	 *
	 * @return IMessage
	 * @since 8.1.0
	 */
	public function createMessage(): IMessage;

	/**
	 * @param string|null $data
	 * @param string|null $filename
	 * @param string|null $contentType
	 * @return IAttachment
	 * @since 13.0.0
	 */
	public function createAttachment($data = null, $filename = null, $contentType = null): IAttachment;

	/**
	 * @param string $path
	 * @param string|null $contentType
	 * @return IAttachment
	 * @since 13.0.0
	 */
	public function createAttachmentFromPath(string $path, $contentType = null): IAttachment;

	/**
	 * Creates a new email template object
	 *
	 * @param string $emailId
	 * @param array $data
	 * @return IEMailTemplate
	 * @since 12.0.0 Parameters added in 12.0.3
	 */
	public function createEMailTemplate(string $emailId, array $data = []): IEMailTemplate;

	/**
	 * Send the specified message. Also sets the from address to the value defined in config.php
	 * if no-one has been passed.
	 *
	 * @param IMessage $message Message to send
	 * @return string[] Array with failed recipients. Be aware that this depends on the used mail backend and
	 * therefore should be considered
	 * @throws \Exception In case it was not possible to send the message. (for example if an invalid mail address
	 * has been supplied.)
	 * @since 8.1.0
	 */
	public function send(IMessage $message): array;

	/**
	 * @param string $email Email address to be validated
	 * @return bool True if the mail address is valid, false otherwise
	 * @since 8.1.0
	 */
	public function validateMailAddress(string $email): bool;
}