FederatedLinkService::checkUpdateLinkFromRemoteLinkUp() - Code Metrics - Inspection of "cleaning code" - nextcloud/circles - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 462815...ee89ff )

by Maxence

created 2017-08-29 17:21 UTC

checkUpdateLinkFromRemoteLinkUp() A

↳ Parent: FederatedLinkService

Complexity

Conditions	3
Paths	3

Size

Total Lines	15
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
dl	0
loc	15
rs	9.4285
c	1
b	0
f	0
cc	3
eloc	9
nc	3
nop	3

<?php
/**
 * Circles - Bring cloud-users closer together.
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Maxence Lange <[email protected]>
 * @copyright 2017
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\Circles\Service;


use Exception;
use OCA\Circles\Api\v1\Circles;
use OCA\Circles\AppInfo\Application;
use OCA\Circles\Db\CirclesRequest;
use OCA\Circles\Db\FederatedLinksRequest;
use OCA\Circles\Exceptions\CircleTypeNotValidException;
use OCA\Circles\Exceptions\FederatedCircleLinkFormatException;
use OCA\Circles\Exceptions\FederatedCircleNotAllowedException;
use OCA\Circles\Exceptions\FederatedCircleStatusUpdateException;
use OCA\Circles\Exceptions\FederatedLinkCreationException;
use OCA\Circles\Exceptions\FederatedLinkUpdateException;
use OCA\Circles\Exceptions\FederatedRemoteCircleDoesNotExistException;
use OCA\Circles\Exceptions\FederatedRemoteDoesNotAllowException;
use OCA\Circles\Exceptions\FederatedRemoteIsDownException;
use OCA\Circles\Exceptions\MemberIsNotAdminException;
use OCA\Circles\Model\Circle;
use OCA\Circles\Model\FederatedLink;
use OCP\Http\Client\IClientService;
use OCP\IL10N;

class FederatedLinkService {

	/** @var string */
	private $userId;

	/** @var IL10N */
	private $l10n;

	/** @var CirclesRequest */
	private $circlesRequest;

	/** @var ConfigService */
	private $configService;

	/** @var CirclesService */
	private $circlesService;

	/** @var BroadcastService */
	private $broadcastService;

	/** @var FederatedLinksRequest */
	private $federatedLinksRequest;

	/** @var EventsService */
	private $eventsService;

	/** @var IClientService */
	private $clientService;

	/** @var MiscService */
	private $miscService;


	/**
	 * CirclesService constructor.
	 *
	 * @param $userId
	 * @param IL10N $l10n
	 * @param CirclesRequest $circlesRequest
	 * @param ConfigService $configService
	 * @param CirclesService $circlesService
	 * @param BroadcastService $broadcastService
	 * @param FederatedLinksRequest $federatedLinksRequest
	 * @param EventsService $eventsService
	 * @param IClientService $clientService
	 * @param MiscService $miscService
	 */
	public function __construct(
		$userId, IL10N $l10n, CirclesRequest $circlesRequest, ConfigService $configService,
		CirclesService $circlesService, BroadcastService $broadcastService,
		FederatedLinksRequest $federatedLinksRequest, EventsService $eventsService,
		IClientService $clientService, MiscService $miscService
	) {
		$this->userId = $userId;
		$this->l10n = $l10n;
		$this->circlesRequest = $circlesRequest;
		$this->configService = $configService;
		$this->circlesService = $circlesService;
		$this->broadcastService = $broadcastService;
		$this->federatedLinksRequest = $federatedLinksRequest;
		$this->eventsService = $eventsService;

		$this->clientService = $clientService;
		$this->miscService = $miscService;
	}


	/**
	 * linkCircle();
	 *
	 * link to a circle.
	 * Function will check if settings allow Federated links between circles, and the format of
	 * the link ($remote). If no exception, a request to the remote circle will be initiated
	 * using requestLinkWithCircle()
	 *
	 * $remote format: <circle_name>@<remote_host>
	 *
	 * @param string $circleUniqueId
	 * @param string $remote
	 *
	 * @throws Exception
	 * @throws FederatedCircleLinkFormatException
	 * @throws CircleTypeNotValidException
	 *
	 * @return FederatedLink
	 */
	public function linkCircle($circleUniqueId, $remote) {

		if (!$this->configService->isFederatedCirclesAllowed()) {
			throw new FederatedCircleNotAllowedException(
				$this->l10n->t("Federated circles are not allowed on this Nextcloud")
			);
		}

		if (strpos($remote, '@') === false) {
			throw new FederatedCircleLinkFormatException(
				$this->l10n->t("Federated link does not have a valid format")
			);
		}

		try {
			return $this->requestLinkWithCircle($circleUniqueId, $remote);
		} catch (Exception $e) {
			throw $e;
		}
	}


	/**
	 * linkStatus()
	 *
	 * Update the status of a link.
	 * Function will check if user can edit the status, will update it and send the update to
	 * remote
	 *
	 * @param int $linkId
	 * @param int $status
	 *
	 * @throws Exception
	 * @throws FederatedCircleLinkFormatException
	 * @throws CircleTypeNotValidException
	 * @throws MemberIsNotAdminException
	 *
	 * @return FederatedLink[]
	 */
	public function linkStatus($linkId, $status) {

		$status = (int)$status;
		$link = null;
		try {

			$link = $this->circlesRequest->getLinkFromId($linkId);
			$circle = $this->circlesRequest->getCircle($link->getCircleId(), $this->userId);
			$circle->hasToBeFederated();
			$circle->getHigherViewer()
				   ->hasToBeAdmin();
			$link->hasToBeValidStatusUpdate($status);

			if (!$this->eventOnLinkStatus($circle, $link, $status)) {
				return $this->circlesRequest->getLinksFromCircle($circle->getUniqueId());
			}

		} catch (Exception $e) {
			throw $e;
		}

		$link->setStatus($status);
		$link->setCircleId($circle->getUniqueId(true));

		try {
			$this->updateLinkRemote($link);
		} catch (Exception $e) {
			if ($status !== FederatedLink::STATUS_LINK_REMOVE) {
				throw $e;
			}
		}

		$this->federatedLinksRequest->update($link);

		return $this->circlesRequest->getLinksFromCircle($circle->getUniqueId());
	}


	/**
	 * eventOnLinkStatus();
	 *
	 * Called by linkStatus() to manage events when status is changing.
	 * If status does not need update, returns false;
	 *
	 * @param Circle $circle
	 * @param FederatedLink $link
	 * @param $status
	 *
	 * @return bool
	 */
	private function eventOnLinkStatus(Circle $circle, FederatedLink $link, $status) {
		if ($link->getStatus() === $status) {
			return false;
		}

		if ($status === FederatedLink::STATUS_LINK_REMOVE) {
			$this->eventsService->onLinkRemove($circle, $link);
		}

		if ($status === FederatedLink::STATUS_LINK_UP) {
			$this->eventsService->onLinkRequestAccepting($circle, $link);
			$this->eventsService->onLinkUp($circle, $link);
		}

		return true;
	}


	/**
	 * requestLinkWithCircle()
	 *
	 * Using CircleId, function will get more infos from the database.
	 * Will check if author is at least admin and initiate a FederatedLink, save it
	 * in the database and send a request to the remote circle using requestLink()
	 * If any issue, entry is removed from the database.
	 *
	 * @param string $circleUniqueId
	 * @param string $remote
	 *
	 * @return FederatedLink
	 * @throws Exception
	 */
	private function requestLinkWithCircle($circleUniqueId, $remote) {

		$link = null;
		try {
			list($remoteCircle, $remoteAddress) = explode('@', $remote, 2);

			$circle = $this->circlesService->detailsCircle($circleUniqueId);
			$circle->getHigherViewer()
				   ->hasToBeAdmin();
			$circle->hasToBeFederated();
			$circle->cantBePersonal();

			$link = new FederatedLink();
			$link->setCircleId($circleUniqueId)
				 ->setLocalAddress($this->configService->getLocalAddress())
				 ->setAddress($remoteAddress)
				 ->setRemoteCircleName($remoteCircle)
				 ->setStatus(FederatedLink::STATUS_LINK_SETUP)
				 ->generateToken();

			$this->federatedLinksRequest->create($link);
			$this->requestLink($circle, $link);

		} catch (Exception $e) {
			if ($link !== null) {
				$this->federatedLinksRequest->delete($link);
			}
			throw $e;
		}

		return $link;
	}


	/**
	 * @param string $remote
	 *
	 * @return string
	 */
	private function generateLinkRemoteURL($remote) {
		return $this->configService->generateRemoteHost($remote) . Application::REMOTE_URL_LINK;
	}


	/**
	 * requestLink()
	 *
	 *
	 * @param Circle $circle
	 * @param FederatedLink $link
	 *
	 * @return boolean
	 * @throws Exception
	 */
	private function requestLink(Circle $circle, FederatedLink &$link) {
		$args = [
			'apiVersion' => Circles::version(),
			'token'      => $link->getToken(true),
			'uniqueId'   => $circle->getUniqueId(true),
			'sourceName' => $circle->getName(),
			'linkTo'     => $link->getRemoteCircleName(),
			'address'    => $link->getLocalAddress()
		];

		$client = $this->clientService->newClient();

		try {
			$request = $client->put(
				$this->generateLinkRemoteURL($link->getAddress()), [
																	 'body'            => $args,
																	 'timeout'         => 10,
																	 'connect_timeout' => 10,
																 ]
			);

			$result = json_decode($request->getBody(), true);
			if ($result === null) {
				throw new FederatedRemoteIsDownException(
					$this->l10n->t(
						'The remote host is down or the Circles app is not installed on it'
					)
				);
			}

			$this->eventOnRequestLink(
				$circle, $link, $result['status'],
				((key_exists('reason', $result)) ? $result['reason'] : '')
			);

			$link->setUniqueId($result['uniqueId']);
			$this->federatedLinksRequest->update($link);

			return true;
		} catch (Exception $e) {
			throw $e;
		}
	}


	/**
	 * eventOnRequestLink();
	 *
	 * Called by requestLink() will update status and event
	 * Will also manage errors returned by the remote link
	 *
	 * @param Circle $circle
	 * @param FederatedLink $link
	 * @param $status
	 * @param $reason
	 *
	 * @throws Exception
	 */
	private function eventOnRequestLink(Circle $circle, FederatedLink $link, $status, $reason) {

		try {
			if ($status === FederatedLink::STATUS_LINK_UP) {
				$link->setStatus(FederatedLink::STATUS_LINK_UP);
				$this->eventsService->onLinkUp($circle, $link);
			} else if ($status === FederatedLink::STATUS_LINK_REQUESTED) {
				$link->setStatus(FederatedLink::STATUS_REQUEST_SENT);
				$this->eventsService->onLinkRequestSent($circle, $link);
			} else {
				$this->parseRequestLinkError($reason);
			}
		} catch (Exception $e) {
			throw $e;
		}
	}


	/**
	 * parseRequestLinkError();
	 *
	 * Will parse the error reason returned by requestLink() and throw an Exception
	 *
	 * @param $reason
	 *
	 * @throws Exception
	 * @throws FederatedRemoteCircleDoesNotExistException
	 * @throws FederatedRemoteDoesNotAllowException
	 */
	private function parseRequestLinkError($reason) {

		if ($reason === 'federated_not_allowed') {
			throw new FederatedRemoteDoesNotAllowException(
				$this->l10n->t('Federated circles are not allowed on the remote Nextcloud')
			);
		}

		if ($reason === 'circle_links_disable') {
			throw new FederatedRemoteDoesNotAllowException(
				$this->l10n->t('The remote circle does not accept federated links')
			);
		}

		if ($reason === 'duplicate_unique_id') {
			throw new FederatedRemoteDoesNotAllowException(
				$this->l10n->t('It seems that you are trying to link a circle to itself')
			);
		}

		if ($reason === 'duplicate_link') {
			throw new FederatedRemoteDoesNotAllowException(
				$this->l10n->t('This link exists already')
			);
		}

		if ($reason === 'circle_does_not_exist') {
			throw new FederatedRemoteCircleDoesNotExistException(
				$this->l10n->t('The requested remote circle does not exist')
			);
		}

		throw new Exception($reason);
	}


	/**
	 * @param string $token
	 * @param string $uniqueId
	 * @param int $status
	 *
	 * @return FederatedLink
	 * @throws Exception
	 */
	public function updateLinkFromRemote($token, $uniqueId, $status) {
		try {
			$link = $this->circlesRequest->getLinkFromToken($token, $uniqueId);
			$circle = $this->circlesRequest->forceGetCircle($link->getCircleId());
			$circle->hasToBeFederated();

			$this->checkUpdateLinkFromRemote($status);
			$this->checkUpdateLinkFromRemoteLinkUp($circle, $link, $status);
			$this->checkUpdateLinkFromRemoteLinkRemove($circle, $link, $status);

			if ($link->getStatus() !== $status) {
				$this->federatedLinksRequest->update($link);
			}

			return $link;
		} catch (Exception $e) {
			throw $e;
		}
	}

	/**
	 * checkUpdateLinkFromRemote();
	 *
	 * will throw exception is the status sent by remote is not correct
	 *
	 * @param int $status
	 *
	 * @throws FederatedCircleStatusUpdateException
	 */
	private function checkUpdateLinkFromRemote($status) {
		$status = (int)$status;
		if ($status !== FederatedLink::STATUS_LINK_UP
			&& $status !== FederatedLink::STATUS_LINK_REMOVE
		) {
			throw new FederatedCircleStatusUpdateException(
				$this->l10n->t('Cannot proceed with this status update')
			);
		}
	}


	/**
	 * checkUpdateLinkFromRemoteLinkUp()
	 *
	 * in case of a request of status update from remote for a link up, we check the current
	 * status of the link locally.
	 *
	 * @param Circle $circle
	 * @param FederatedLink $link
	 * @param int $status
	 *
	 * @throws FederatedCircleStatusUpdateException
	 */
	private function checkUpdateLinkFromRemoteLinkUp(Circle $circle, FederatedLink $link, $status) {
		if ((int)$status !== FederatedLink::STATUS_LINK_UP) {
			return;
		}

		if ($link->getStatus() !== FederatedLink::STATUS_REQUEST_SENT) {
			throw new FederatedCircleStatusUpdateException(
				$this->l10n->t('Cannot proceed with this status update')
			);
		}

		$this->eventsService->onLinkRequestAccepted($circle, $link);
		$this->eventsService->onLinkUp($circle, $link);
		$link->setStatus($status);
	}


	/**
	 * checkUpdateLinkFromRemoteLinkRemove();
	 *
	 * in case of a request of status update from remote for a link down, we check the current
	 * status of the link locally
	 *
	 * @param Circle $circle
	 * @param FederatedLink $link
	 * @param int $status
	 *
	 * @throws FederatedCircleStatusUpdateException
	 */
	private function checkUpdateLinkFromRemoteLinkRemove(
		Circle $circle, FederatedLink $link, $status
	) {
		if ((int)$status !== FederatedLink::STATUS_LINK_REMOVE) {
			return;
		}

		if ($link->getStatus() === FederatedLink::STATUS_REQUEST_SENT) {

			$link->setStatus(FederatedLink::STATUS_REQUEST_DECLINED);
			$this->eventsService->onLinkRequestRejected($circle, $link);

			return;
		}

		if ($link->getStatus() === FederatedLink::STATUS_LINK_REQUESTED) {

			$link->setStatus(FederatedLink::STATUS_LINK_REMOVE);
			$this->eventsService->onLinkRequestCanceled($circle, $link);

			return;
		}

		if ($link->getStatus() > FederatedLink::STATUS_LINK_DOWN) {

			$link->setStatus(FederatedLink::STATUS_LINK_DOWN);
			$this->eventsService->onLinkDown($circle, $link);

			return;
		}

		throw new FederatedCircleStatusUpdateException(
			$this->l10n->t('Cannot proceed with this status update')
		);
	}


	/**
	 * updateLinkRemote()
	 *
	 * Send a request to the remote of the link to update its status.
	 *
	 * @param FederatedLink $link
	 *
	 * @return bool
	 * @throws Exception
	 */
	public function updateLinkRemote(FederatedLink &$link) {
		$args = [
			'apiVersion' => Circles::version(),
			'token'      => $link->getToken(true),
			'uniqueId'   => $link->getCircleId(true),
			'status'     => $link->getStatus()
		];

		$client = $this->clientService->newClient();
		try {
			$request = $client->post(
				$this->generateLinkRemoteURL($link->getAddress()), [
																	 'body'            => $args,
																	 'timeout'         => 10,
																	 'connect_timeout' => 10,
																 ]
			);

			$result = json_decode($request->getBody(), true);
			if ($result['status'] === -1) {
				throw new FederatedLinkUpdateException($result['reason']);
			}

			return true;
		} catch (Exception $e) {
			throw $e;
		}
	}


	/**
	 * Create a new link into database and assign the correct status.
	 *
	 * @param Circle $circle
	 * @param FederatedLink $link
	 *
	 * @throws Exception
	 */
	public function initiateLink(Circle $circle, FederatedLink &$link) {

		try {
			$this->checkLinkRequestValidity($circle, $link);
			$link->setCircleId($circle->getUniqueId());

			if ($circle->getSetting('allow_links_auto') === 'true') {
				$link->setStatus(FederatedLink::STATUS_LINK_UP);
				$this->eventsService->onLinkUp($circle, $link);
			} else {
				$link->setStatus(FederatedLink::STATUS_LINK_REQUESTED);
				$this->eventsService->onLinkRequestReceived($circle, $link);
			}

			$this->federatedLinksRequest->create($link);
		} catch (Exception $e) {
			throw $e;
		}
	}


	/**
	 * @param Circle $circle
	 * @param FederatedLink $link
	 *
	 * @throws FederatedLinkCreationException
	 */
	private function checkLinkRequestValidity($circle, $link) {
		if ($circle->getUniqueId(true) === $link->getUniqueId(true)) {
			throw new FederatedLinkCreationException('duplicate_unique_id');
		}

		if ($this->getLink($circle->getUniqueId(), $link->getUniqueId(true)) !== null) {
			throw new FederatedLinkCreationException('duplicate_link');
		}

		if ($circle->getSetting('allow_links') !== 'true') {
			throw new FederatedLinkCreationException('circle_links_disable');
		}
	}


	/**
	 * @param string $circleUniqueId
	 * @param string $uniqueId
	 *
	 * @return FederatedLink

	 */
	public function getLink($circleUniqueId, $uniqueId) {
		return $this->federatedLinksRequest->getFromUniqueId($circleUniqueId, $uniqueId);
	}


	/**
	 * @param string $circleUniqueId
	 *
	 * @return FederatedLink[]
	 */
	public function getLinksFromCircle($circleUniqueId) {
		return $this->federatedLinksRequest->getLinked($circleUniqueId);
	}

}

1		<?php
2		/**
3		* Circles - Bring cloud-users closer together.
4		*
5		* This file is licensed under the Affero General Public License version 3 or
6		* later. See the COPYING file.
7		*
8		* @author Maxence Lange <[email protected]>
9		* @copyright 2017
10		* @license GNU AGPL version 3 or any later version
11		*
12		* This program is free software: you can redistribute it and/or modify
13		* it under the terms of the GNU Affero General Public License as
14		* published by the Free Software Foundation, either version 3 of the
15		* License, or (at your option) any later version.
16		*
17		* This program is distributed in the hope that it will be useful,
18		* but WITHOUT ANY WARRANTY; without even the implied warranty of
19		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20		* GNU Affero General Public License for more details.
21		*
22		* You should have received a copy of the GNU Affero General Public License
23		* along with this program. If not, see <http://www.gnu.org/licenses/>.
24		*
25		*/
26
27		namespace OCA\Circles\Service;
28
29
30		use Exception;
31		use OCA\Circles\Api\v1\Circles;
32		use OCA\Circles\AppInfo\Application;
33		use OCA\Circles\Db\CirclesRequest;
34		use OCA\Circles\Db\FederatedLinksRequest;
35		use OCA\Circles\Exceptions\CircleTypeNotValidException;
36		use OCA\Circles\Exceptions\FederatedCircleLinkFormatException;
37		use OCA\Circles\Exceptions\FederatedCircleNotAllowedException;
38		use OCA\Circles\Exceptions\FederatedCircleStatusUpdateException;
39		use OCA\Circles\Exceptions\FederatedLinkCreationException;
40		use OCA\Circles\Exceptions\FederatedLinkUpdateException;
41		use OCA\Circles\Exceptions\FederatedRemoteCircleDoesNotExistException;
42		use OCA\Circles\Exceptions\FederatedRemoteDoesNotAllowException;
43		use OCA\Circles\Exceptions\FederatedRemoteIsDownException;
44		use OCA\Circles\Exceptions\MemberIsNotAdminException;
45		use OCA\Circles\Model\Circle;
46		use OCA\Circles\Model\FederatedLink;
47		use OCP\Http\Client\IClientService;
48		use OCP\IL10N;
49
50		class FederatedLinkService {
51
52		/** @var string */
53		private $userId;
54
55		/** @var IL10N */
56		private $l10n;
57
58		/** @var CirclesRequest */
59		private $circlesRequest;
60
61		/** @var ConfigService */
62		private $configService;
63
64		/** @var CirclesService */
65		private $circlesService;
66
67		/** @var BroadcastService */
68		private $broadcastService;
69
70		/** @var FederatedLinksRequest */
71		private $federatedLinksRequest;
72
73		/** @var EventsService */
74		private $eventsService;
75
76		/** @var IClientService */
77		private $clientService;
78
79		/** @var MiscService */
80		private $miscService;
81
82
83		/**
84		* CirclesService constructor.
85		*
86		* @param $userId
87		* @param IL10N $l10n
88		* @param CirclesRequest $circlesRequest
89		* @param ConfigService $configService
90		* @param CirclesService $circlesService
91		* @param BroadcastService $broadcastService
92		* @param FederatedLinksRequest $federatedLinksRequest
93		* @param EventsService $eventsService
94		* @param IClientService $clientService
95		* @param MiscService $miscService
96		*/
97		public function __construct(
98		$userId, IL10N $l10n, CirclesRequest $circlesRequest, ConfigService $configService,
99		CirclesService $circlesService, BroadcastService $broadcastService,
100		FederatedLinksRequest $federatedLinksRequest, EventsService $eventsService,
101		IClientService $clientService, MiscService $miscService
102		) {
103		$this->userId = $userId;
104		$this->l10n = $l10n;
105		$this->circlesRequest = $circlesRequest;
106		$this->configService = $configService;
107		$this->circlesService = $circlesService;
108		$this->broadcastService = $broadcastService;
109		$this->federatedLinksRequest = $federatedLinksRequest;
110		$this->eventsService = $eventsService;
111
112		$this->clientService = $clientService;
113		$this->miscService = $miscService;
114		}
115
116
117		/**
118		* linkCircle();
119		*
120		* link to a circle.
121		* Function will check if settings allow Federated links between circles, and the format of
122		* the link ($remote). If no exception, a request to the remote circle will be initiated
123		* using requestLinkWithCircle()
124		*
125		* $remote format: <circle_name>@<remote_host>
126		*
127		* @param string $circleUniqueId
128		* @param string $remote
129		*
130		* @throws Exception
131		* @throws FederatedCircleLinkFormatException
132		* @throws CircleTypeNotValidException
133		*
134		* @return FederatedLink
135		*/
136		public function linkCircle($circleUniqueId, $remote) {
137
138		if (!$this->configService->isFederatedCirclesAllowed()) {
139		throw new FederatedCircleNotAllowedException(
140		$this->l10n->t("Federated circles are not allowed on this Nextcloud")
141		);
142		}
143
144		if (strpos($remote, '@') === false) {
145		throw new FederatedCircleLinkFormatException(
146		$this->l10n->t("Federated link does not have a valid format")
147		);
148		}
149
150		try {
151		return $this->requestLinkWithCircle($circleUniqueId, $remote);
152		} catch (Exception $e) {
153		throw $e;
154		}
155		}
156
157
158		/**
159		* linkStatus()
160		*
161		* Update the status of a link.
162		* Function will check if user can edit the status, will update it and send the update to
163		* remote
164		*
165		* @param int $linkId
166		* @param int $status
167		*
168		* @throws Exception
169		* @throws FederatedCircleLinkFormatException
170		* @throws CircleTypeNotValidException
171		* @throws MemberIsNotAdminException
172		*
173		* @return FederatedLink[]
174		*/
175		public function linkStatus($linkId, $status) {
176
177		$status = (int)$status;
178		$link = null;
179		try {
180
181		$link = $this->circlesRequest->getLinkFromId($linkId);
182		$circle = $this->circlesRequest->getCircle($link->getCircleId(), $this->userId);
183		$circle->hasToBeFederated();
184		$circle->getHigherViewer()
185		->hasToBeAdmin();
186		$link->hasToBeValidStatusUpdate($status);
187
188		if (!$this->eventOnLinkStatus($circle, $link, $status)) {
189		return $this->circlesRequest->getLinksFromCircle($circle->getUniqueId());
190		}
191
192		} catch (Exception $e) {
193		throw $e;
194		}
195
196		$link->setStatus($status);
197		$link->setCircleId($circle->getUniqueId(true));
198
199		try {
200		$this->updateLinkRemote($link);
201		} catch (Exception $e) {
202		if ($status !== FederatedLink::STATUS_LINK_REMOVE) {
203		throw $e;
204		}
205		}
206
207		$this->federatedLinksRequest->update($link);
208
209		return $this->circlesRequest->getLinksFromCircle($circle->getUniqueId());
210		}
211
212
213		/**
214		* eventOnLinkStatus();
215		*
216		* Called by linkStatus() to manage events when status is changing.
217		* If status does not need update, returns false;
218		*
219		* @param Circle $circle
220		* @param FederatedLink $link
221		* @param $status
222		*
223		* @return bool
224		*/
225		private function eventOnLinkStatus(Circle $circle, FederatedLink $link, $status) {
226		if ($link->getStatus() === $status) {
227		return false;
228		}
229
230		if ($status === FederatedLink::STATUS_LINK_REMOVE) {
231		$this->eventsService->onLinkRemove($circle, $link);
232		}
233
234		if ($status === FederatedLink::STATUS_LINK_UP) {
235		$this->eventsService->onLinkRequestAccepting($circle, $link);
236		$this->eventsService->onLinkUp($circle, $link);
237		}
238
239		return true;
240		}
241
242
243		/**
244		* requestLinkWithCircle()
245		*
246		* Using CircleId, function will get more infos from the database.
247		* Will check if author is at least admin and initiate a FederatedLink, save it
248		* in the database and send a request to the remote circle using requestLink()
249		* If any issue, entry is removed from the database.
250		*
251		* @param string $circleUniqueId
252		* @param string $remote
253		*
254		* @return FederatedLink
255		* @throws Exception
256		*/
257		private function requestLinkWithCircle($circleUniqueId, $remote) {
258
259		$link = null;
260		try {
261		list($remoteCircle, $remoteAddress) = explode('@', $remote, 2);
262
263		$circle = $this->circlesService->detailsCircle($circleUniqueId);
264		$circle->getHigherViewer()
265		->hasToBeAdmin();
266		$circle->hasToBeFederated();
267		$circle->cantBePersonal();
268
269		$link = new FederatedLink();
270		$link->setCircleId($circleUniqueId)
271		->setLocalAddress($this->configService->getLocalAddress())
272		->setAddress($remoteAddress)
273		->setRemoteCircleName($remoteCircle)
274		->setStatus(FederatedLink::STATUS_LINK_SETUP)
275		->generateToken();
276
277		$this->federatedLinksRequest->create($link);
278		$this->requestLink($circle, $link);
279
280		} catch (Exception $e) {
281		if ($link !== null) {
282		$this->federatedLinksRequest->delete($link);
283		}
284		throw $e;
285		}
286
287		return $link;
288		}
289
290
291		/**
292		* @param string $remote
293		*
294		* @return string
295		*/
296		private function generateLinkRemoteURL($remote) {
297		return $this->configService->generateRemoteHost($remote) . Application::REMOTE_URL_LINK;
298		}
299
300
301		/**
302		* requestLink()
303		*
304		*
305		* @param Circle $circle
306		* @param FederatedLink $link
307		*
308		* @return boolean
309		* @throws Exception
310		*/
311		private function requestLink(Circle $circle, FederatedLink &$link) {
312		$args = [
313		'apiVersion' => Circles::version(),
314		'token' => $link->getToken(true),
315		'uniqueId' => $circle->getUniqueId(true),
316		'sourceName' => $circle->getName(),
317		'linkTo' => $link->getRemoteCircleName(),
318		'address' => $link->getLocalAddress()
319		];
320
321		$client = $this->clientService->newClient();
322
323		try {
324		$request = $client->put(
325		$this->generateLinkRemoteURL($link->getAddress()), [
326		'body' => $args,
327		'timeout' => 10,
328		'connect_timeout' => 10,
329		]
330		);
331
332		$result = json_decode($request->getBody(), true);
333		if ($result === null) {
334		throw new FederatedRemoteIsDownException(
335		$this->l10n->t(
336		'The remote host is down or the Circles app is not installed on it'
337		)
338		);
339		}
340
341		$this->eventOnRequestLink(
342		$circle, $link, $result['status'],
343		((key_exists('reason', $result)) ? $result['reason'] : '')
344		);
345
346		$link->setUniqueId($result['uniqueId']);
347		$this->federatedLinksRequest->update($link);
348
349		return true;
350		} catch (Exception $e) {
351		throw $e;
352		}
353		}
354
355
356		/**
357		* eventOnRequestLink();
358		*
359		* Called by requestLink() will update status and event
360		* Will also manage errors returned by the remote link
361		*
362		* @param Circle $circle
363		* @param FederatedLink $link
364		* @param $status
365		* @param $reason
366		*
367		* @throws Exception
368		*/
369		private function eventOnRequestLink(Circle $circle, FederatedLink $link, $status, $reason) {
370
371		try {
372		if ($status === FederatedLink::STATUS_LINK_UP) {
373		$link->setStatus(FederatedLink::STATUS_LINK_UP);
374		$this->eventsService->onLinkUp($circle, $link);
375		} else if ($status === FederatedLink::STATUS_LINK_REQUESTED) {
376		$link->setStatus(FederatedLink::STATUS_REQUEST_SENT);
377		$this->eventsService->onLinkRequestSent($circle, $link);
378		} else {
379		$this->parseRequestLinkError($reason);
380		}
381		} catch (Exception $e) {
382		throw $e;
383		}
384		}
385
386
387		/**
388		* parseRequestLinkError();
389		*
390		* Will parse the error reason returned by requestLink() and throw an Exception
391		*
392		* @param $reason
393		*
394		* @throws Exception
395		* @throws FederatedRemoteCircleDoesNotExistException
396		* @throws FederatedRemoteDoesNotAllowException
397		*/
398		private function parseRequestLinkError($reason) {
399
400		if ($reason === 'federated_not_allowed') {
401		throw new FederatedRemoteDoesNotAllowException(
402		$this->l10n->t('Federated circles are not allowed on the remote Nextcloud')
403		);
404		}
405
406		if ($reason === 'circle_links_disable') {
407		throw new FederatedRemoteDoesNotAllowException(
408		$this->l10n->t('The remote circle does not accept federated links')
409		);
410		}
411
412		if ($reason === 'duplicate_unique_id') {
413		throw new FederatedRemoteDoesNotAllowException(
414		$this->l10n->t('It seems that you are trying to link a circle to itself')
415		);
416		}
417
418		if ($reason === 'duplicate_link') {
419		throw new FederatedRemoteDoesNotAllowException(
420		$this->l10n->t('This link exists already')
421		);
422		}
423
424		if ($reason === 'circle_does_not_exist') {
425		throw new FederatedRemoteCircleDoesNotExistException(
426		$this->l10n->t('The requested remote circle does not exist')
427		);
428		}
429
430		throw new Exception($reason);
431		}
432
433
434		/**
435		* @param string $token
436		* @param string $uniqueId
437		* @param int $status
438		*
439		* @return FederatedLink
440		* @throws Exception
441		*/
442		public function updateLinkFromRemote($token, $uniqueId, $status) {
443		try {
444		$link = $this->circlesRequest->getLinkFromToken($token, $uniqueId);
445		$circle = $this->circlesRequest->forceGetCircle($link->getCircleId());
446		$circle->hasToBeFederated();
447
448		$this->checkUpdateLinkFromRemote($status);
449		$this->checkUpdateLinkFromRemoteLinkUp($circle, $link, $status);
450		$this->checkUpdateLinkFromRemoteLinkRemove($circle, $link, $status);
451
452		if ($link->getStatus() !== $status) {
453		$this->federatedLinksRequest->update($link);
454		}
455
456		return $link;
457		} catch (Exception $e) {
458		throw $e;
459		}
460		}
461
462		/**
463		* checkUpdateLinkFromRemote();
464		*
465		* will throw exception is the status sent by remote is not correct
466		*
467		* @param int $status
468		*
469		* @throws FederatedCircleStatusUpdateException
470		*/
471		private function checkUpdateLinkFromRemote($status) {
472		$status = (int)$status;
473		if ($status !== FederatedLink::STATUS_LINK_UP
474		&& $status !== FederatedLink::STATUS_LINK_REMOVE
475		) {
476		throw new FederatedCircleStatusUpdateException(
477		$this->l10n->t('Cannot proceed with this status update')
478		);
479		}
480		}
481
482
483		/**
484		* checkUpdateLinkFromRemoteLinkUp()
485		*
486		* in case of a request of status update from remote for a link up, we check the current
487		* status of the link locally.
488		*
489		* @param Circle $circle
490		* @param FederatedLink $link
491		* @param int $status
492		*
493		* @throws FederatedCircleStatusUpdateException
494		*/
495		private function checkUpdateLinkFromRemoteLinkUp(Circle $circle, FederatedLink $link, $status) {
496		if ((int)$status !== FederatedLink::STATUS_LINK_UP) {
497		return;
498		}
499
500		if ($link->getStatus() !== FederatedLink::STATUS_REQUEST_SENT) {
501		throw new FederatedCircleStatusUpdateException(
502		$this->l10n->t('Cannot proceed with this status update')
503		);
504		}
505
506		$this->eventsService->onLinkRequestAccepted($circle, $link);
507		$this->eventsService->onLinkUp($circle, $link);
508		$link->setStatus($status);
509		}
510
511
512		/**
513		* checkUpdateLinkFromRemoteLinkRemove();
514		*
515		* in case of a request of status update from remote for a link down, we check the current
516		* status of the link locally
517		*
518		* @param Circle $circle
519		* @param FederatedLink $link
520		* @param int $status
521		*
522		* @throws FederatedCircleStatusUpdateException
523		*/
524		private function checkUpdateLinkFromRemoteLinkRemove(
525		Circle $circle, FederatedLink $link, $status
526		) {
527		if ((int)$status !== FederatedLink::STATUS_LINK_REMOVE) {
528		return;
529		}
530
531	View Code Duplication	if ($link->getStatus() === FederatedLink::STATUS_REQUEST_SENT) {
		0 ignored issues – show Duplication introduced 2017-06-14 12:50 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
532		$link->setStatus(FederatedLink::STATUS_REQUEST_DECLINED);
533		$this->eventsService->onLinkRequestRejected($circle, $link);
534
535		return;
536		}
537
538	View Code Duplication	if ($link->getStatus() === FederatedLink::STATUS_LINK_REQUESTED) {
		0 ignored issues – show Duplication introduced 2017-06-14 12:50 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
539		$link->setStatus(FederatedLink::STATUS_LINK_REMOVE);
540		$this->eventsService->onLinkRequestCanceled($circle, $link);
541
542		return;
543		}
544
545	View Code Duplication	if ($link->getStatus() > FederatedLink::STATUS_LINK_DOWN) {
		0 ignored issues – show Duplication introduced 2017-06-14 12:50 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
546		$link->setStatus(FederatedLink::STATUS_LINK_DOWN);
547		$this->eventsService->onLinkDown($circle, $link);
548
549		return;
550		}
551
552		throw new FederatedCircleStatusUpdateException(
553		$this->l10n->t('Cannot proceed with this status update')
554		);
555		}
556
557
558		/**
559		* updateLinkRemote()
560		*
561		* Send a request to the remote of the link to update its status.
562		*
563		* @param FederatedLink $link
564		*
565		* @return bool
566		* @throws Exception
567		*/
568		public function updateLinkRemote(FederatedLink &$link) {
569		$args = [
570		'apiVersion' => Circles::version(),
571		'token' => $link->getToken(true),
572		'uniqueId' => $link->getCircleId(true),
573		'status' => $link->getStatus()
574		];
575
576		$client = $this->clientService->newClient();
577		try {
578		$request = $client->post(
579		$this->generateLinkRemoteURL($link->getAddress()), [
580		'body' => $args,
581		'timeout' => 10,
582		'connect_timeout' => 10,
583		]
584		);
585
586		$result = json_decode($request->getBody(), true);
587		if ($result['status'] === -1) {
588		throw new FederatedLinkUpdateException($result['reason']);
589		}
590
591		return true;
592		} catch (Exception $e) {
593		throw $e;
594		}
595		}
596
597
598		/**
599		* Create a new link into database and assign the correct status.
600		*
601		* @param Circle $circle
602		* @param FederatedLink $link
603		*
604		* @throws Exception
605		*/
606		public function initiateLink(Circle $circle, FederatedLink &$link) {
607
608		try {
609		$this->checkLinkRequestValidity($circle, $link);
610		$link->setCircleId($circle->getUniqueId());
611
612		if ($circle->getSetting('allow_links_auto') === 'true') {
613		$link->setStatus(FederatedLink::STATUS_LINK_UP);
614		$this->eventsService->onLinkUp($circle, $link);
615		} else {
616		$link->setStatus(FederatedLink::STATUS_LINK_REQUESTED);
617		$this->eventsService->onLinkRequestReceived($circle, $link);
618		}
619
620		$this->federatedLinksRequest->create($link);
621		} catch (Exception $e) {
622		throw $e;
623		}
624		}
625
626
627		/**
628		* @param Circle $circle
629		* @param FederatedLink $link
630		*
631		* @throws FederatedLinkCreationException
632		*/
633		private function checkLinkRequestValidity($circle, $link) {
634		if ($circle->getUniqueId(true) === $link->getUniqueId(true)) {
635		throw new FederatedLinkCreationException('duplicate_unique_id');
636		}
637
638		if ($this->getLink($circle->getUniqueId(), $link->getUniqueId(true)) !== null) {
639		throw new FederatedLinkCreationException('duplicate_link');
640		}
641
642		if ($circle->getSetting('allow_links') !== 'true') {
643		throw new FederatedLinkCreationException('circle_links_disable');
644		}
645		}
646
647
648		/**
649		* @param string $circleUniqueId
650		* @param string $uniqueId
651		*
652		* @return FederatedLink
		0 ignored issues – show Documentation introduced 2017-08-01 16:41 UTC by Report Bug Copy Issue Report Should the return type not be `FederatedLink\|null`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
653		*/
654		public function getLink($circleUniqueId, $uniqueId) {
655		return $this->federatedLinksRequest->getFromUniqueId($circleUniqueId, $uniqueId);
656		}
657
658
659		/**
660		* @param string $circleUniqueId
661		*
662		* @return FederatedLink[]
663		*/
664		public function getLinksFromCircle($circleUniqueId) {
665		return $this->federatedLinksRequest->getLinked($circleUniqueId);
666		}
667
668		}

nextcloud / circles

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checkUpdateLinkFromRemoteLinkUp() A

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