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<?php

declare(strict_types=1);

/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Joas Schilling <coding@schilljs.com>
 * @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 OC\Notification;

use OCP\Notification\IAction;
use OCP\Notification\INotification;
use OCP\RichObjectStrings\InvalidObjectExeption;
use OCP\RichObjectStrings\IValidator;

class Notification implements INotification {
	protected string $app = '';
	protected string $user = '';
	protected \DateTime $dateTime;
	protected string $objectType = '';
	protected string $objectId = '';
	protected string $subject = '';
	protected array $subjectParameters = [];
	protected string $subjectParsed = '';
	protected string $subjectRich = '';
	protected array $subjectRichParameters = [];
	protected string $message = '';
	protected array $messageParameters = [];
	protected string $messageParsed = '';
	protected string $messageRich = '';
	protected array $messageRichParameters = [];
	protected string $link = '';
	protected string $icon = '';
	protected array $actions = [];
	protected array $actionsParsed = [];
	protected bool $hasPrimaryAction = false;
	protected bool $hasPrimaryParsedAction = false;

	public function __construct(
		protected IValidator $richValidator,
	) {
		$this->dateTime = new \DateTime();
		$this->dateTime->setTimestamp(0);
	}

	/**
	 * @param string $app
	 * @return $this
	 * @throws \InvalidArgumentException if the app id is invalid
	 * @since 8.2.0
	 */
	public function setApp(string $app): INotification {
		if ($app === '' || isset($app[32])) {
			throw new \InvalidArgumentException('The given app name is invalid');
		}
		$this->app = $app;
		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getApp(): string {
		return $this->app;
	}

	/**
	 * @param string $user
	 * @return $this
	 * @throws \InvalidArgumentException if the user id is invalid
	 * @since 8.2.0
	 */
	public function setUser(string $user): INotification {
		if ($user === '' || isset($user[64])) {
			throw new \InvalidArgumentException('The given user id is invalid');
		}
		$this->user = $user;
		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getUser(): string {
		return $this->user;
	}

	/**
	 * @param \DateTime $dateTime
	 * @return $this
	 * @throws \InvalidArgumentException if the $dateTime is invalid
	 * @since 9.0.0
	 */
	public function setDateTime(\DateTime $dateTime): INotification {
		if ($dateTime->getTimestamp() === 0) {
			throw new \InvalidArgumentException('The given date time is invalid');
		}
		$this->dateTime = $dateTime;
		return $this;
	}

	/**
	 * @return \DateTime
	 * @since 9.0.0
	 */
	public function getDateTime(): \DateTime {
		return $this->dateTime;
	}

	/**
	 * @param string $type
	 * @param string $id
	 * @return $this
	 * @throws \InvalidArgumentException if the object type or id is invalid
	 * @since 8.2.0 - 9.0.0: Type of $id changed to string
	 */
	public function setObject(string $type, string $id): INotification {
		if ($type === '' || isset($type[64])) {
			throw new \InvalidArgumentException('The given object type is invalid');
		}
		$this->objectType = $type;

		if ($id === '' || isset($id[64])) {
			throw new \InvalidArgumentException('The given object id is invalid');
		}
		$this->objectId = $id;
		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getObjectType(): string {
		return $this->objectType;
	}

	/**
	 * @return string
	 * @since 8.2.0 - 9.0.0: Return type changed to string
	 */
	public function getObjectId(): string {
		return $this->objectId;
	}

	/**
	 * @param string $subject
	 * @param array $parameters
	 * @return $this
	 * @throws \InvalidArgumentException if the subject or parameters are invalid
	 * @since 8.2.0
	 */
	public function setSubject(string $subject, array $parameters = []): INotification {
		if ($subject === '' || isset($subject[64])) {
			throw new \InvalidArgumentException('The given subject is invalid');
		}

		$this->subject = $subject;
		$this->subjectParameters = $parameters;

		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getSubject(): string {
		return $this->subject;
	}

	/**
	 * @return array
	 * @since 8.2.0
	 */
	public function getSubjectParameters(): array {
		return $this->subjectParameters;
	}

	/**
	 * @param string $subject
	 * @return $this
	 * @throws \InvalidArgumentException if the subject is invalid
	 * @since 8.2.0
	 */
	public function setParsedSubject(string $subject): INotification {
		if ($subject === '') {
			throw new \InvalidArgumentException('The given parsed subject is invalid');
		}
		$this->subjectParsed = $subject;
		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getParsedSubject(): string {
		return $this->subjectParsed;
	}

	/**
	 * @param string $subject
	 * @param array $parameters
	 * @return $this
	 * @throws \InvalidArgumentException if the subject or parameters are invalid
	 * @since 11.0.0
	 */
	public function setRichSubject(string $subject, array $parameters = []): INotification {
		if ($subject === '') {
			throw new \InvalidArgumentException('The given parsed subject is invalid');
		}

		$this->subjectRich = $subject;
		$this->subjectRichParameters = $parameters;

		if ($this->subjectParsed === '') {
			$this->subjectParsed = $this->richToParsed($subject, $parameters);
		}

		return $this;
	}

	/**
	 * @throws \InvalidArgumentException if a parameter has no name or no type
	 */
	private function richToParsed(string $message, array $parameters): string {
		$placeholders = [];
		$replacements = [];
		foreach ($parameters as $placeholder => $parameter) {
			$placeholders[] = '{' . $placeholder . '}';
			foreach (['name','type'] as $requiredField) {
				if (!isset($parameter[$requiredField]) || !is_string($parameter[$requiredField])) {
					throw new \InvalidArgumentException("Invalid rich object, {$requiredField} field is missing");
				}
			}
			if ($parameter['type'] === 'user') {
				$replacements[] = '@' . $parameter['name'];
			} elseif ($parameter['type'] === 'file') {
				$replacements[] = $parameter['path'] ?? $parameter['name'];
			} else {
				$replacements[] = $parameter['name'];
			}
		}
		return str_replace($placeholders, $replacements, $message);
	}

	/**
	 * @return string
	 * @since 11.0.0
	 */
	public function getRichSubject(): string {
		return $this->subjectRich;
	}

	/**
	 * @return array[]
	 * @since 11.0.0
	 */
	public function getRichSubjectParameters(): array {
		return $this->subjectRichParameters;
	}

	/**
	 * @param string $message
	 * @param array $parameters
	 * @return $this
	 * @throws \InvalidArgumentException if the message or parameters are invalid
	 * @since 8.2.0
	 */
	public function setMessage(string $message, array $parameters = []): INotification {
		if ($message === '' || isset($message[64])) {
			throw new \InvalidArgumentException('The given message is invalid');
		}

		$this->message = $message;
		$this->messageParameters = $parameters;

		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getMessage(): string {
		return $this->message;
	}

	/**
	 * @return array
	 * @since 8.2.0
	 */
	public function getMessageParameters(): array {
		return $this->messageParameters;
	}

	/**
	 * @param string $message
	 * @return $this
	 * @throws \InvalidArgumentException if the message is invalid
	 * @since 8.2.0
	 */
	public function setParsedMessage(string $message): INotification {
		if ($message === '') {
			throw new \InvalidArgumentException('The given parsed message is invalid');
		}
		$this->messageParsed = $message;
		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getParsedMessage(): string {
		return $this->messageParsed;
	}

	/**
	 * @param string $message
	 * @param array $parameters
	 * @return $this
	 * @throws \InvalidArgumentException if the message or parameters are invalid
	 * @since 11.0.0
	 */
	public function setRichMessage(string $message, array $parameters = []): INotification {
		if ($message === '') {
			throw new \InvalidArgumentException('The given parsed message is invalid');
		}

		$this->messageRich = $message;
		$this->messageRichParameters = $parameters;

		if ($this->messageParsed === '') {
			$this->messageParsed = $this->richToParsed($message, $parameters);
		}

		return $this;
	}

	/**
	 * @return string
	 * @since 11.0.0
	 */
	public function getRichMessage(): string {
		return $this->messageRich;
	}

	/**
	 * @return array[]
	 * @since 11.0.0
	 */
	public function getRichMessageParameters(): array {
		return $this->messageRichParameters;
	}

	/**
	 * @param string $link
	 * @return $this
	 * @throws \InvalidArgumentException if the link is invalid
	 * @since 8.2.0
	 */
	public function setLink(string $link): INotification {
		if ($link === '' || isset($link[4000])) {
			throw new \InvalidArgumentException('The given link is invalid');
		}
		$this->link = $link;
		return $this;
	}

	/**
	 * @return string
	 * @since 8.2.0
	 */
	public function getLink(): string {
		return $this->link;
	}

	/**
	 * @param string $icon
	 * @return $this
	 * @throws \InvalidArgumentException if the icon is invalid
	 * @since 11.0.0
	 */
	public function setIcon(string $icon): INotification {
		if ($icon === '' || isset($icon[4000])) {
			throw new \InvalidArgumentException('The given icon is invalid');
		}
		$this->icon = $icon;
		return $this;
	}

	/**
	 * @return string
	 * @since 11.0.0
	 */
	public function getIcon(): string {
		return $this->icon;
	}

	/**
	 * @return IAction
	 * @since 8.2.0
	 */
	public function createAction(): IAction {
		return new Action();
	}

	/**
	 * @param IAction $action
	 * @return $this
	 * @throws \InvalidArgumentException if the action is invalid
	 * @since 8.2.0
	 */
	public function addAction(IAction $action): INotification {
		if (!$action->isValid()) {
			throw new \InvalidArgumentException('The given action is invalid');
		}

		if ($action->isPrimary()) {
			if ($this->hasPrimaryAction) {
				throw new \InvalidArgumentException('The notification already has a primary action');
			}

			$this->hasPrimaryAction = true;
		}

		$this->actions[] = $action;
		return $this;
	}

	/**
	 * @return IAction[]
	 * @since 8.2.0
	 */
	public function getActions(): array {
		return $this->actions;
	}

	/**
	 * @param IAction $action
	 * @return $this
	 * @throws \InvalidArgumentException if the action is invalid
	 * @since 8.2.0
	 */
	public function addParsedAction(IAction $action): INotification {
		if (!$action->isValidParsed()) {
			throw new \InvalidArgumentException('The given parsed action is invalid');
		}

		if ($action->isPrimary()) {
			if ($this->hasPrimaryParsedAction) {
				throw new \InvalidArgumentException('The notification already has a primary action');
			}

			$this->hasPrimaryParsedAction = true;

			// Make sure the primary action is always the first one
			array_unshift($this->actionsParsed, $action);
		} else {
			$this->actionsParsed[] = $action;
		}

		return $this;
	}

	/**
	 * @return IAction[]
	 * @since 8.2.0
	 */
	public function getParsedActions(): array {
		return $this->actionsParsed;
	}

	/**
	 * @return bool
	 * @since 8.2.0
	 */
	public function isValid(): bool {
		return
			$this->isValidCommon()
			&&
			$this->getSubject() !== ''
		;
	}

	/**
	 * @return bool
	 * @since 8.2.0
	 */
	public function isValidParsed(): bool {
		if ($this->getRichSubject() !== '' || !empty($this->getRichSubjectParameters())) {
			try {
				$this->richValidator->validate($this->getRichSubject(), $this->getRichSubjectParameters());
			} catch (InvalidObjectExeption $e) {
				return false;
			}
		}

		if ($this->getRichMessage() !== '' || !empty($this->getRichMessageParameters())) {
			try {
				$this->richValidator->validate($this->getRichMessage(), $this->getRichMessageParameters());
			} catch (InvalidObjectExeption $e) {
				return false;
			}
		}

		return
			$this->isValidCommon()
			&&
			$this->getParsedSubject() !== ''
		;
	}

	protected function isValidCommon(): bool {
		return
			$this->getApp() !== ''
			&&
			$this->getUser() !== ''
			&&
			$this->getDateTime()->getTimestamp() !== 0
			&&
			$this->getObjectType() !== ''
			&&
			$this->getObjectId() !== ''
		;
	}
}

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