Merge pull request #7306 from nextcloud/feature/noid/simple-polls

📊 Simple polls API
3 years ago · 2f16ea57ae
21 changed files with 1963 additions and 13 deletions
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@ -16,7 +16,7 @@ And in the works for the [coming versions](https://github.com/nextcloud/spreed/m

 	]]></description>

-	<version>15.0.0-dev.3</version>
+	<version>15.0.0-dev.4</version>
 	<licence>agpl</licence>

 	<author>Aleksandra Lazarević</author>
--- a/appinfo/routes.php
+++ b/appinfo/routes.php
@ -35,6 +35,7 @@ return array_merge_recursive(
 	include(__DIR__ . '/routes/routesMatterbridgeController.php'),
 	include(__DIR__ . '/routes/routesMatterbridgeSettingsController.php'),
 	include(__DIR__ . '/routes/routesPageController.php'),
+	include(__DIR__ . '/routes/routesPollController.php'),
 	include(__DIR__ . '/routes/routesPublicShareAuthController.php'),
 	include(__DIR__ . '/routes/routesReactionController.php'),
 	include(__DIR__ . '/routes/routesRoomController.php'),
--- a/appinfo/routes/routesPollController.php
+++ b/appinfo/routes/routesPollController.php
@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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/>.
+ *
+ */
+
+$requirements = [
+	'apiVersion' => 'v1',
+	'token' => '^[a-z0-9]{4,30}$',
+];
+
+$requirementsWithPollId = [
+	'apiVersion' => 'v1',
+	'token' => '^[a-z0-9]{4,30}$',
+	'pollId' => '^[0-9]+$',
+];
+
+return [
+	'ocs' => [
+		/** @see \OCA\Talk\Controller\PollController::createPoll() */
+		['name' => 'Poll#createPoll', 'url' => '/api/{apiVersion}/poll/{token}', 'verb' => 'POST', 'requirements' => $requirements],
+		/** @see \OCA\Talk\Controller\PollController::showPoll() */
+		['name' => 'Poll#showPoll', 'url' => '/api/{apiVersion}/poll/{token}/{pollId}', 'verb' => 'GET', 'requirements' => $requirementsWithPollId],
+		/** @see \OCA\Talk\Controller\PollController::votePoll() */
+		['name' => 'Poll#votePoll', 'url' => '/api/{apiVersion}/poll/{token}/{pollId}', 'verb' => 'POST', 'requirements' => $requirementsWithPollId],
+		/** @see \OCA\Talk\Controller\PollController::closePoll() */
+		['name' => 'Poll#closePoll', 'url' => '/api/{apiVersion}/poll/{token}/{pollId}', 'verb' => 'DELETE', 'requirements' => $requirementsWithPollId],
+	],
+];
--- a/docs/constants.md
+++ b/docs/constants.md
@ -99,6 +99,16 @@ title: Constants
 * `other` - Shared objects not falling into any other category
 * `voice` - Voice messages

+## Poll
+
+### Poll status
+* `0` - Open: Participants can cast votes
+* `1` - Closed: Participants can no longer cast votes and the result is displayed
+
+### Poll mode
+* `0` - Public: Participants can see the result immediately and also who voted for which option
+* `1` - Hidden: The result is hidden until the poll is closed and then only the number of votes for each option are displayed
+
 ## Signaling modes
 * `internal` - No external signaling server is used
 * `external` - A single external signaling server is used
--- a/docs/poll.md
+++ b/docs/poll.md
@ -0,0 +1,114 @@
+# Poll API
+
+Base endpoint is: `/ocs/v2.php/apps/spreed/api/v1`
+
+## Create a poll in a conversation
+
+* Method: `POST`
+* Endpoint: `/poll/{token}`
+* Data:
+
+| field        | type         | Description                                                                                                                                                                                                                    |
+|--------------|--------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `question`   | string       | The question of the poll                                                                                                                                                                                                       |
+| `options`    | string[]     | Array of strings with the voting options                                                                                                                                                                                       |
+| `resultMode` | int          | The result and voting mode of the poll, `0` means participants can immediatelly see the result and who voted for which option. `1` means the result is hidden until the poll is closed and then only the summary is published. |
+| `maxVotes`   | int          | Maximum amount of options a participant can vote for                                                                                                                                                                           |
+
+* Response:
+    - Status code:
+        + `201 Created`
+        + `400 Bad Request` When the question or the options were too long
+        + `403 Forbidden` When the conversation is read-only
+        + `403 Forbidden` When the actor does not have chat permissions
+        + `404 Not Found` When the conversation could not be found for the participant
+        + `412 Precondition Failed` When the lobby is active and the user is not a moderator
+
+    - Data:
+
+        See [Poll data](#poll-data)
+
+## Get state or result of a poll
+
+* Method: `GET`
+* Endpoint: `/poll/{token}/{pollId}`
+
+* Response:
+    - Status code:
+        + `201 Created`
+        + `400 Bad Request` In case of any other error
+        + `404 Not Found` When the conversation could not be found for the participant
+        + `404 Not Found` When the poll id could not be found in the conversation
+        + `412 Precondition Failed` When the lobby is active and the user is not a moderator
+
+    - Data:
+
+      See [Poll data](#poll-data)
+
+## Vote on a poll
+
+* Method: `POST`
+* Endpoint: `/poll/{token}/{pollId}`
+* Data:
+
+| field        | type  | Description                                      |
+|--------------|-------|--------------------------------------------------|
+| `optionIds`  | int[] | The option IDs the participant wants to vote for |
+
+
+* Response:
+    - Status code:
+        + `201 Created`
+        + `400 Bad Request` When an option id is invalid
+        + `400 Bad Request` When too many options were voted
+        + `404 Not Found` When the conversation could not be found for the participant
+        + `404 Not Found` When the poll id could not be found in the conversation
+        + `412 Precondition Failed` When the lobby is active and the user is not a moderator
+
+    - Data:
+
+      See [Poll data](#poll-data)
+
+## Close a poll
+
+* Method: `DELETE`
+* Endpoint: `/poll/{token}/{pollId}`
+
+* Response:
+    - Status code:
+        + `200 OK`
+        + `403 Forbidden` When the participant is not the author of the poll or a moderator
+        + `404 Not Found` When the conversation could not be found for the participant
+        + `404 Not Found` When the poll id could not be found in the conversation
+        + `412 Precondition Failed` When the lobby is active and the user is not a moderator
+
+    - Data:
+
+      See [Poll data](#poll-data)
+
+## Poll data
+
+| field              | type     | Description                                                                                                      |
+|--------------------|----------|------------------------------------------------------------------------------------------------------------------|
+| `id`               | int      | ID of the poll                                                                                                   |
+| `question`         | string   | The question of the poll                                                                                         |
+| `options`          | string[] | The options participants can vote for                                                                            |
+| `votes`            | int[]    | Map with optionId => number of votes (only available for when the actor voted on public poll or the poll is closed) |
+| `actorType`        | string   | Actor type of the poll author (see [Constants - Attendee types](constants.md#attendee-types))                    |
+| `actorId`          | string   | Actor ID identifying the poll author                                                                             |
+| `actorDisplayName` | string   | Display name of the poll author                                                                                  |
+| `status`           | int      | Status of the poll (see [Constants - Poll status](constants.md#poll-status))                                     |
+| `resultMode`       | int      | Result mode of the poll (see [Constants - Poll mode](constants.md#poll-mode))                                    |
+| `maxVotes`         | int      | Maximum amount of options a user can vote for, `0` means unlimited                                               |
+| `votedSelf`        | int[]    | Array of option ids the participant voted for                                                                    |
+| `numVoters`        | int      | The number of unique voters that (only available for when the actor voted on public poll or the poll is closed)  |
+| `details`          | array[]  | Detailed list who voted for which option (only available for public closed polls), see [Details](#details) below |
+
+### Details
+
+| field            | type   | Description                                                                                                  |
+|------------------|--------|--------------------------------------------------------------------------------------------------------------|
+| actorType        | string | The actor type of the participant that voted (see [Constants - Attendee types](constants.md#attendee-types)) |
+| actorId          | string | The actor id of the participant that voted                                                                   |
+| actorDisplayName | string | The display name of the participant that voted                                                               |
+| optionId         | int    | The option that was voted for                                                                                |
--- a/lib/Chat/ChatManager.php
+++ b/lib/Chat/ChatManager.php
@ -33,6 +33,7 @@ use OCA\Talk\Participant;
 use OCA\Talk\Room;
 use OCA\Talk\Service\AttachmentService;
 use OCA\Talk\Service\ParticipantService;
+use OCA\Talk\Service\PollService;
 use OCA\Talk\Share\RoomShareProvider;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\Comments\IComment;
@ -85,6 +86,7 @@ class ChatManager {
 	private IManager $shareManager;
 	private RoomShareProvider $shareProvider;
 	private ParticipantService $participantService;
+	private PollService $pollService;
 	private Notifier $notifier;
 	protected ITimeFactory $timeFactory;
 	protected ICache $cache;
@ -98,6 +100,7 @@ class ChatManager {
 								IManager $shareManager,
 								RoomShareProvider $shareProvider,
 								ParticipantService $participantService,
+								PollService $pollService,
 								Notifier $notifier,
 								ICacheFactory $cacheFactory,
 								ITimeFactory $timeFactory,
@ -109,6 +112,7 @@ class ChatManager {
 		$this->shareManager = $shareManager;
 		$this->shareProvider = $shareProvider;
 		$this->participantService = $participantService;
+		$this->pollService = $pollService;
 		$this->notifier = $notifier;
 		$this->cache = $cacheFactory->createDistributed('talk/lastmsgid');
 		$this->unreadCountCache = $cacheFactory->createDistributed('talk/unreadcount');
@ -621,6 +625,8 @@ class ChatManager {
 		$this->notifier->removePendingNotificationsForRoom($chat);

 		$this->attachmentService->deleteAttachmentsForRoom($chat);
+
+		$this->pollService->deleteByRoomId($chat->getId());
 	}

 	/**
--- a/lib/Chat/Parser/SystemMessage.php
+++ b/lib/Chat/Parser/SystemMessage.php
@ -461,6 +461,18 @@ class SystemMessage {
 			if ($currentUserIsActor) {
 				$parsedMessage = $this->l->t('You cleared the history of the conversation');
 			}
+		} elseif ($message === 'poll_closed') {
+			$parsedParameters['poll'] = $parameters['poll'];
+			$parsedMessage = $this->l->t('{actor} closed the poll {poll}');
+			if ($currentUserIsActor) {
+				$parsedMessage = $this->l->t('You closed the poll {poll}');
+			}
+		} elseif ($message === 'poll_voted') {
+			$parsedParameters['poll'] = $parameters['poll'];
+			$parsedMessage = $this->l->t('{actor} voted on the poll {poll}');
+			if ($currentUserIsActor) {
+				$parsedMessage = $this->l->t('You voted on the poll {poll}');
+			}
 		} else {
 			throw new \OutOfBoundsException('Unknown subject');
 		}
--- a/lib/Controller/PollController.php
+++ b/lib/Controller/PollController.php
@ -0,0 +1,260 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Controller;
+
+use OCA\Talk\Chat\ChatManager;
+use OCA\Talk\Exceptions\WrongPermissionsException;
+use OCA\Talk\Model\Poll;
+use OCA\Talk\Model\Vote;
+use OCA\Talk\Service\AttachmentService;
+use OCA\Talk\Service\PollService;
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\DB\Exception;
+use OCP\IRequest;
+use Psr\Log\LoggerInterface;
+
+class PollController extends AEnvironmentAwareController {
+	protected ChatManager $chatManager;
+	protected PollService $pollService;
+	protected AttachmentService $attachmentService;
+	protected ITimeFactory $timeFactory;
+	protected LoggerInterface $logger;
+
+	public function __construct(string $appName,
+								IRequest $request,
+								ChatManager $chatManager,
+								PollService $pollService,
+								AttachmentService $attachmentService,
+								ITimeFactory $timeFactory,
+								LoggerInterface $logger) {
+		parent::__construct($appName, $request);
+		$this->pollService = $pollService;
+		$this->attachmentService = $attachmentService;
+		$this->chatManager = $chatManager;
+		$this->timeFactory = $timeFactory;
+		$this->logger = $logger;
+	}
+
+	/**
+	 * @PublicPage
+	 * @RequireParticipant
+	 * @RequireReadWriteConversation
+	 * @RequirePermissions(permissions=chat)
+	 * @RequireModeratorOrNoLobby
+	 *
+	 * @param string $question
+	 * @param array $options
+	 * @param int $resultMode
+	 * @param int $maxVotes
+	 * @return DataResponse
+	 */
+	public function createPoll(string $question, array $options, int $resultMode, int $maxVotes): DataResponse {
+		$attendee = $this->participant->getAttendee();
+		try {
+			$poll = $this->pollService->createPoll(
+				$this->room->getId(),
+				$attendee->getActorType(),
+				$attendee->getActorId(),
+				$attendee->getDisplayName(),
+				$question,
+				$options,
+				$resultMode,
+				$maxVotes
+			);
+		} catch (\Exception $e) {
+			$this->logger->error('Error creating poll', ['exception' => $e]);
+			return new DataResponse([], Http::STATUS_BAD_REQUEST);
+		}
+
+		$message = json_encode([
+			'message' => 'object_shared',
+			'parameters' => [
+				'objectType' => 'talk-poll',
+				'objectId' => $poll->getId(),
+				'metaData' => [
+					'type' => 'talk-poll',
+					'id' => $poll->getId(),
+					'name' => $question,
+				]
+			],
+		], JSON_THROW_ON_ERROR);
+
+		try {
+			$this->chatManager->addSystemMessage($this->room, $attendee->getActorType(), $attendee->getActorId(), $message, $this->timeFactory->getDateTime(), true);
+		} catch (\Exception $e) {
+			$this->logger->error($e->getMessage(), ['exception' => $e]);
+		}
+
+		return new DataResponse($this->renderPoll($poll, []), Http::STATUS_CREATED);
+	}
+
+	/**
+	 * @PublicPage
+	 * @RequireParticipant
+	 * @RequireModeratorOrNoLobby
+	 *
+	 * @param int $pollId
+	 * @return DataResponse
+	 */
+	public function showPoll(int $pollId): DataResponse {
+		try {
+			$poll = $this->pollService->getPoll($this->room->getId(), $pollId);
+		} catch (DoesNotExistException $e) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		$votedSelf = $this->pollService->getVotesForActor($this->participant, $poll);
+		$detailedVotes = [];
+		if ($poll->getResultMode() === Poll::MODE_PUBLIC && $poll->getStatus() === Poll::STATUS_CLOSED) {
+			$detailedVotes = $this->pollService->getVotes($poll);
+		}
+
+		return new DataResponse($this->renderPoll($poll, $votedSelf, $detailedVotes));
+	}
+
+	/**
+	 * @PublicPage
+	 * @RequireParticipant
+	 * @RequireModeratorOrNoLobby
+	 *
+	 * @param int $pollId
+	 * @param int[] $optionIds
+	 * @return DataResponse
+	 */
+	public function votePoll(int $pollId, array $optionIds): DataResponse {
+		try {
+			$poll = $this->pollService->getPoll($this->room->getId(), $pollId);
+		} catch (\Exception $e) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		if ($poll->getStatus() === Poll::STATUS_CLOSED) {
+			return new DataResponse([], Http::STATUS_BAD_REQUEST);
+		}
+
+		try {
+			$votedSelf = $this->pollService->votePoll($this->participant, $poll, $optionIds);
+		} catch (\RuntimeException $e) {
+			return new DataResponse([], Http::STATUS_BAD_REQUEST);
+		}
+
+		if ($poll->getResultMode() === Poll::MODE_PUBLIC) {
+			$attendee = $this->participant->getAttendee();
+			try {
+				$message = json_encode([
+					'message' => 'poll_voted',
+					'parameters' => [
+						'poll' => [
+							'type' => 'talk-poll',
+							'id' => $poll->getId(),
+							'name' => $poll->getQuestion(),
+						],
+					],
+				], JSON_THROW_ON_ERROR);
+				$this->chatManager->addSystemMessage($this->room, $attendee->getActorType(), $attendee->getActorId(), $message, $this->timeFactory->getDateTime(), true);
+			} catch (\Exception $e) {
+				$this->logger->error($e->getMessage(), ['exception' => $e]);
+			}
+		}
+
+		return new DataResponse($this->renderPoll($poll, $votedSelf));
+	}
+
+	/**
+	 * @PublicPage
+	 * @RequireParticipant
+	 * @RequireModeratorOrNoLobby
+	 *
+	 * @param int $pollId
+	 * @return DataResponse
+	 */
+	public function closePoll(int $pollId): DataResponse {
+		try {
+			$poll = $this->pollService->getPoll($this->room->getId(), $pollId);
+		} catch (\Exception $e) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		$poll->setStatus(Poll::STATUS_CLOSED);
+
+		try {
+			$this->pollService->updatePoll($this->participant, $poll);
+		} catch (WrongPermissionsException $e) {
+			return new DataResponse([], Http::STATUS_FORBIDDEN);
+		} catch (Exception $e) {
+			$this->logger->error($e->getMessage(), ['exception' => $e]);
+			return new DataResponse([], Http::STATUS_INTERNAL_SERVER_ERROR);
+		}
+
+		$attendee = $this->participant->getAttendee();
+		try {
+			$message = json_encode([
+				'message' => 'poll_closed',
+				'parameters' => [
+					'poll' => [
+						'type' => 'talk-poll',
+						'id' => $poll->getId(),
+						'name' => $poll->getQuestion(),
+					],
+				],
+			], JSON_THROW_ON_ERROR);
+			$this->chatManager->addSystemMessage($this->room, $attendee->getActorType(), $attendee->getActorId(), $message, $this->timeFactory->getDateTime(), true);
+		} catch (\Exception $e) {
+			$this->logger->error($e->getMessage(), ['exception' => $e]);
+		}
+
+		$detailedVotes = [];
+		if ($poll->getResultMode() === Poll::MODE_PUBLIC) {
+			$detailedVotes = $this->pollService->getVotes($poll);
+		}
+
+		$votedSelf = $this->pollService->getVotesForActor($this->participant, $poll);
+
+		return new DataResponse($this->renderPoll($poll, $votedSelf, $detailedVotes));
+	}
+
+	protected function renderPoll(Poll $poll, array $votedSelf = [], array $detailedVotes = []): array {
+		$data = $poll->asArray();
+		unset($data['roomId']);
+
+		$canSeeSummary = !empty($votedSelf) && $poll->getResultMode() === Poll::MODE_PUBLIC;
+
+		if (!$canSeeSummary && $poll->getStatus() === Poll::STATUS_OPEN) {
+			$data['votes'] = [];
+			$data['numVoters'] = 0;
+		} elseif ($poll->getResultMode() === Poll::MODE_PUBLIC && $poll->getStatus() === Poll::STATUS_CLOSED) {
+			$data['details'] = array_map(static fn (Vote $vote) => $vote->asArray(), $detailedVotes);
+		}
+
+		$data['votedSelf'] = array_map(static fn (Vote $vote) => $vote->getOptionId(), $votedSelf);
+
+		return $data;
+	}
+}
--- a/lib/GuestManager.php
+++ b/lib/GuestManager.php
@ -27,6 +27,7 @@ use OCA\Talk\Events\AddEmailEvent;
 use OCA\Talk\Events\ModifyParticipantEvent;
 use OCA\Talk\Model\Attendee;
 use OCA\Talk\Service\ParticipantService;
+use OCA\Talk\Service\PollService;
 use OCP\Defaults;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IL10N;
@ -42,19 +43,13 @@ class GuestManager {
 	public const EVENT_AFTER_NAME_UPDATE = self::class . '::updateName';

 	protected Config $talkConfig;
-
 	protected IMailer $mailer;
-
 	protected Defaults $defaults;
-
 	protected IUserSession $userSession;
-
-	private ParticipantService $participantService;
-
+	protected ParticipantService $participantService;
+	protected PollService $pollService;
 	protected IURLGenerator $url;
-
 	protected IL10N $l;
-
 	protected IEventDispatcher $dispatcher;

 	public function __construct(Config $talkConfig,
@ -62,6 +57,7 @@ class GuestManager {
 								Defaults $defaults,
 								IUserSession $userSession,
 								ParticipantService $participantService,
+								PollService $pollService,
 								IURLGenerator $url,
 								IL10N $l,
 								IEventDispatcher $dispatcher) {
@ -70,6 +66,7 @@ class GuestManager {
 		$this->defaults = $defaults;
 		$this->userSession = $userSession;
 		$this->participantService = $participantService;
+		$this->pollService = $pollService;
 		$this->url = $url;
 		$this->l = $l;
 		$this->dispatcher = $dispatcher;
@ -89,6 +86,12 @@ class GuestManager {
 				$displayName
 			);

+			$this->pollService->updateDisplayNameForActor(
+				$attendee->getActorType(),
+				$attendee->getActorId(),
+				$displayName
+			);
+
 			$event = new ModifyParticipantEvent($room, $participant, 'name', $displayName);
 			$this->dispatcher->dispatch(self::EVENT_AFTER_NAME_UPDATE, $event);
 		}
--- a/lib/Listener/UserDisplayNameListener.php
+++ b/lib/Listener/UserDisplayNameListener.php
@ -25,15 +25,19 @@ namespace OCA\Talk\Listener;

 use OCA\Talk\Model\Attendee;
 use OCA\Talk\Service\ParticipantService;
+use OCA\Talk\Service\PollService;
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventListener;
 use OCP\User\Events\UserChangedEvent;

 class UserDisplayNameListener implements IEventListener {
 	private ParticipantService $participantService;
+	private PollService $pollService;

-	public function __construct(ParticipantService $participantService) {
+	public function __construct(ParticipantService $participantService,
+								PollService $pollService) {
 		$this->participantService = $participantService;
+		$this->pollService = $pollService;
 	}

 	public function handle(Event $event): void {
@ -52,5 +56,11 @@ class UserDisplayNameListener implements IEventListener {
 			$event->getUser()->getUID(),
 			(string) $event->getValue()
 		);
+
+		$this->pollService->updateDisplayNameForActor(
+			Attendee::ACTOR_USERS,
+			$event->getUser()->getUID(),
+			(string) $event->getValue()
+		);
 	}
 }
--- a/lib/Migration/Version15000Date20220503121308.php
+++ b/lib/Migration/Version15000Date20220503121308.php
@ -0,0 +1,145 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Migration;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version15000Date20220503121308 extends SimpleMigrationStep {
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 * @return null|ISchemaWrapper
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		if (!$schema->hasTable('talk_polls')) {
+			$table = $schema->createTable('talk_polls');
+
+			$table->addColumn('id', Types::BIGINT, [
+				'autoincrement' => true,
+				'notnull' => true,
+				'length' => 20,
+			]);
+			$table->addColumn('room_id', Types::BIGINT, [
+				'notnull' => true,
+				'length' => 20,
+			]);
+			$table->addColumn('question', Types::TEXT, [
+				'notnull' => false,
+				'length' => null,
+			]);
+			$table->addColumn('options', Types::TEXT, [
+				'notnull' => false,
+				'length' => null,
+			]);
+			$table->addColumn('votes', Types::TEXT, [
+				'notnull' => false,
+				'length' => null,
+			]);
+			$table->addColumn('num_voters', Types::BIGINT, [
+				'notnull' => false,
+				'length' => 20,
+				'default' => 0,
+			]);
+			$table->addColumn('actor_type', Types::STRING, [
+				'notnull' => true,
+				'length' => 64,
+			]);
+			$table->addColumn('actor_id', Types::STRING, [
+				'notnull' => true,
+				'length' => 64,
+			]);
+			$table->addColumn('display_name', Types::STRING, [
+				'notnull' => false,
+				'length' => 255,
+			]);
+			$table->addColumn('status', Types::SMALLINT, [
+				'notnull' => false,
+				'default' => 0,
+			]);
+			$table->addColumn('result_mode', Types::SMALLINT, [
+				'notnull' => false,
+				'default' => 0,
+			]);
+			$table->addColumn('max_votes', Types::INTEGER, [
+				'notnull' => true,
+				'default' => 0,
+			]);
+
+			$table->setPrimaryKey(['id']);
+			$table->addIndex(['room_id'], 'talk_poll_room');
+		}
+
+		if (!$schema->hasTable('talk_poll_votes')) {
+			$table = $schema->createTable('talk_poll_votes');
+
+			$table->addColumn('id', Types::BIGINT, [
+				'autoincrement' => true,
+				'notnull' => true,
+				'length' => 20,
+			]);
+			$table->addColumn('poll_id', Types::BIGINT, [
+				'notnull' => true,
+				'length' => 20,
+			]);
+			$table->addColumn('room_id', Types::BIGINT, [
+				'notnull' => true,
+				'length' => 20,
+			]);
+			$table->addColumn('actor_type', Types::STRING, [
+				'notnull' => true,
+				'length' => 64,
+			]);
+			$table->addColumn('actor_id', Types::STRING, [
+				'notnull' => true,
+				'length' => 64,
+			]);
+			$table->addColumn('display_name', Types::STRING, [
+				'notnull' => false,
+				'length' => 255,
+			]);
+			$table->addColumn('option_id', Types::INTEGER, [
+				'notnull' => true,
+				'length' => 6,
+				'default' => 1,
+			]);
+
+			$table->setPrimaryKey(['id']);
+			$table->addIndex(['poll_id', 'actor_type', 'actor_id'], 'talk_poll_vote');
+			$table->addIndex(['room_id'], 'talk_vote_room');
+		}
+
+		return $schema;
+	}
+}
--- a/lib/Model/Poll.php
+++ b/lib/Model/Poll.php
@ -0,0 +1,108 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Model;
+
+use OCP\AppFramework\Db\Entity;
+
+/**
+ * @method void setRoomId(int $roomId)
+ * @method int getRoomId()
+ * @method void setQuestion(string $question)
+ * @method string getQuestion()
+ * @method void setOptions(string $options)
+ * @method string getOptions()
+ * @method void setVotes(string $votes)
+ * @method string getVotes()
+ * @method void setNumVoters(int $numVoters)
+ * @method int getNumVoters()
+ * @method void setActorType(string $actorType)
+ * @method string getActorType()
+ * @method void setActorId(string $actorId)
+ * @method string getActorId()
+ * @method void setDisplayName(string $displayName)
+ * @method string getDisplayName()
+ * @method void setStatus(int $status)
+ * @method int getStatus()
+ * @method void setResultMode(int $resultMode)
+ * @method int getResultMode()
+ * @method void setMaxVotes(int $maxVotes)
+ * @method int getMaxVotes()
+ */
+class Poll extends Entity {
+	public const STATUS_OPEN = 0;
+	public const STATUS_CLOSED = 1;
+	public const MODE_PUBLIC = 0;
+	public const MODE_HIDDEN = 1;
+	public const MAX_VOTES_UNLIMITED = 0;
+
+	protected int $roomId = 0;
+	protected string $question = '';
+	protected string $options = '';
+	protected string $votes = '';
+	protected int $numVoters = 0;
+	protected string $actorType = '';
+	protected string $actorId = '';
+	protected ?string $displayName = null;
+	protected int $status = self::STATUS_OPEN;
+	protected int $resultMode = self::MODE_PUBLIC;
+	protected int $maxVotes = self::MAX_VOTES_UNLIMITED;
+
+	public function __construct() {
+		$this->addType('roomId', 'int');
+		$this->addType('question', 'string');
+		$this->addType('options', 'string');
+		$this->addType('votes', 'string');
+		$this->addType('numVoters', 'int');
+		$this->addType('actorType', 'string');
+		$this->addType('actorId', 'string');
+		$this->addType('displayName', 'string');
+		$this->addType('status', 'int');
+		$this->addType('resultMode', 'int');
+		$this->addType('maxVotes', 'int');
+	}
+
+	/**
+	 * @return array
+	 */
+	public function asArray(): array {
+		return [
+			'id' => $this->getId(),
+			// The room id is not needed on the API level but only internally for optimising database queries
+			// 'roomId' => $this->getRoomId(),
+			'question' => $this->getQuestion(),
+			'options' => json_decode($this->getOptions(), true, 512, JSON_THROW_ON_ERROR),
+			'votes' => json_decode($this->getVotes(), true, 512, JSON_THROW_ON_ERROR),
+			'numVoters' => $this->getNumVoters(),
+			'actorType' => $this->getActorType(),
+			'actorId' => $this->getActorId(),
+			'actorDisplayName' => $this->getDisplayName(),
+			'status' => $this->getStatus(),
+			'resultMode' => $this->getResultMode(),
+			'maxVotes' => $this->getMaxVotes(),
+		];
+	}
+}
--- a/lib/Model/PollMapper.php
+++ b/lib/Model/PollMapper.php
@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Model;
+
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Db\MultipleObjectsReturnedException;
+use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\Exception;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class PollMapper extends QBMapper {
+
+	/**
+	 * @param IDBConnection $db
+	 */
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'talk_polls', Poll::class);
+	}
+
+	/**
+	 * @param int $pollId
+	 * @return Poll
+	 * @throws DoesNotExistException
+	 * @throws MultipleObjectsReturnedException
+	 * @throws Exception
+	 */
+	public function getByPollId(int $pollId): Poll {
+		$query = $this->db->getQueryBuilder();
+
+		$query->select('*')
+			->from($this->getTableName())
+			->where($query->expr()->eq('id', $query->createNamedParameter($pollId, IQueryBuilder::PARAM_INT)));
+
+		return $this->findEntity($query);
+	}
+
+	public function deleteByRoomId(int $roomId): void {
+		$query = $this->db->getQueryBuilder();
+
+		$query->delete($this->getTableName())
+			->where($query->expr()->eq('room_id', $query->createNamedParameter($roomId, IQueryBuilder::PARAM_INT)));
+
+		$query->executeStatement();
+	}
+}
--- a/lib/Model/Vote.php
+++ b/lib/Model/Vote.php
@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Model;
+
+use OCP\AppFramework\Db\Entity;
+
+/**
+ * @method void setPollId(int $pollId)
+ * @method int getPollId()
+ * @method void setRoomId(int $roomId)
+ * @method int getRoomId()
+ * @method void setActorType(string $actorType)
+ * @method string getActorType()
+ * @method void setActorId(string $actorId)
+ * @method string getActorId()
+ * @method void setDisplayName(string $displayName)
+ * @method string getDisplayName()
+ * @method void setOptionId(int $optionId)
+ * @method int getOptionId()
+ */
+class Vote extends Entity {
+	protected int $pollId = 0;
+	protected int $roomId = 0;
+	protected string $actorType = '';
+	protected string $actorId = '';
+	protected ?string $displayName = null;
+	protected int $optionId = 0;
+
+	public function __construct() {
+		$this->addType('pollId', 'int');
+		$this->addType('roomId', 'int');
+		$this->addType('actorType', 'string');
+		$this->addType('actorId', 'string');
+		$this->addType('displayName', 'string');
+		$this->addType('optionId', 'int');
+	}
+
+	/**
+	 * @return array
+	 */
+	public function asArray(): array {
+		return [
+			// The ids are not needed on the API level but only internally for optimising database queries
+			// 'id' => $this->getId(),
+			// 'pollId' => $this->getPollId(),
+			// 'roomId' => $this->getRoomId(),
+			'actorType' => $this->getActorType(),
+			'actorId' => $this->getActorId(),
+			'actorDisplayName' => $this->getDisplayName(),
+			'optionId' => $this->getOptionId(),
+		];
+	}
+}
--- a/lib/Model/VoteMapper.php
+++ b/lib/Model/VoteMapper.php
@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Model;
+
+use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class VoteMapper extends QBMapper {
+
+	/**
+	 * @param IDBConnection $db
+	 */
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'talk_poll_votes', Vote::class);
+	}
+
+	/**
+	 * @param int $pollId
+	 * @return Vote[]
+	 */
+	public function findByPollId(int $pollId): array {
+		$query = $this->db->getQueryBuilder();
+		$query->select('*')
+			->from($this->getTableName())
+			->where($query->expr()->eq('poll_id', $query->createNamedParameter($pollId)));
+
+		return $this->findEntities($query);
+	}
+
+	/**
+	 * @param int $pollId
+	 * @param string $actorType
+	 * @param string $actorId
+	 * @return Vote[]
+	 */
+	public function findByPollIdForActor(int $pollId, string $actorType, string $actorId): array {
+		$query = $this->db->getQueryBuilder();
+		$query->select('*')
+			->from($this->getTableName())
+			->where($query->expr()->eq('poll_id', $query->createNamedParameter($pollId)))
+			->andWhere($query->expr()->eq('actor_type', $query->createNamedParameter($actorType)))
+			->andWhere($query->expr()->eq('actor_id', $query->createNamedParameter($actorId)));
+
+		return $this->findEntities($query);
+	}
+
+	public function deleteByRoomId(int $roomId): void {
+		$query = $this->db->getQueryBuilder();
+
+		$query->delete($this->getTableName())
+			->where($query->expr()->eq('room_id', $query->createNamedParameter($roomId, IQueryBuilder::PARAM_INT)));
+
+		$query->executeStatement();
+	}
+
+	public function deleteVotesByActor(int $pollId, string $actorType, string $actorId): void {
+		$query = $this->db->getQueryBuilder();
+
+		$query->delete($this->getTableName())
+			->where($query->expr()->eq('poll_id', $query->createNamedParameter($pollId)))
+			->andWhere($query->expr()->eq('actor_type', $query->createNamedParameter($actorType)))
+			->andWhere($query->expr()->eq('actor_id', $query->createNamedParameter($actorId)));
+
+		$query->executeStatement();
+	}
+}
--- a/lib/Service/PollService.php
+++ b/lib/Service/PollService.php
@ -0,0 +1,281 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Talk\Service;
+
+use OCA\Talk\Exceptions\WrongPermissionsException;
+use OCA\Talk\Model\Poll;
+use OCA\Talk\Model\PollMapper;
+use OCA\Talk\Model\Vote;
+use OCA\Talk\Model\VoteMapper;
+use OCA\Talk\Participant;
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\DB\Exception;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class PollService {
+	protected IDBConnection $connection;
+	protected PollMapper $pollMapper;
+	protected VoteMapper $voteMapper;
+
+	public function __construct(IDBConnection $connection,
+								PollMapper $pollMapper,
+								VoteMapper $voteMapper) {
+		$this->connection = $connection;
+		$this->pollMapper = $pollMapper;
+		$this->voteMapper = $voteMapper;
+	}
+
+	public function createPoll(int $roomId, string $actorType, string $actorId, string $displayName, string $question, array $options, int $resultMode, int $maxVotes): Poll {
+		$poll = new Poll();
+		$poll->setRoomId($roomId);
+		$poll->setActorType($actorType);
+		$poll->setActorId($actorId);
+		$poll->setDisplayName($displayName);
+		$poll->setQuestion($question);
+		$poll->setOptions(json_encode($options));
+		$poll->setVotes(json_encode([]));
+		$poll->setResultMode($resultMode);
+		$poll->setMaxVotes($maxVotes);
+
+		$this->pollMapper->insert($poll);
+
+		return $poll;
+	}
+
+	/**
+	 * @param int $roomId
+	 * @param int $pollId
+	 * @return Poll
+	 * @throws DoesNotExistException
+	 */
+	public function getPoll(int $roomId, int $pollId): Poll {
+		$poll = $this->pollMapper->getByPollId($pollId);
+
+		if ($poll->getRoomId() !== $roomId) {
+			throw new DoesNotExistException('Room id mismatch');
+		}
+
+		return $poll;
+	}
+
+	/**
+	 * @param Participant $participant
+	 * @param Poll $poll
+	 * @throws WrongPermissionsException
+	 * @throws Exception
+	 */
+	public function updatePoll(Participant $participant, Poll $poll): void {
+		if (!$participant->hasModeratorPermissions()
+		 && ($poll->getActorType() !== $participant->getAttendee()->getActorType()
+		 || $poll->getActorId() !== $participant->getAttendee()->getActorId())) {
+			// Only moderators and the author of the poll can update it
+			throw new WrongPermissionsException();
+		}
+
+		$this->pollMapper->update($poll);
+	}
+
+	/**
+	 * @param Participant $participant
+	 * @param Poll $poll
+	 * @return Vote[]
+	 */
+	public function getVotesForActor(Participant $participant, Poll $poll): array {
+		return $this->voteMapper->findByPollIdForActor(
+			$poll->getId(),
+			$participant->getAttendee()->getActorType(),
+			$participant->getAttendee()->getActorId()
+		);
+	}
+
+	/**
+	 * @param Poll $poll
+	 * @return Vote[]
+	 */
+	public function getVotes(Poll $poll): array {
+		return $this->voteMapper->findByPollId($poll->getId());
+	}
+
+	/**
+	 * @param Participant $participant
+	 * @param Poll $poll
+	 * @param int[] $optionIds Options the user voted for
+	 * @return Vote[]
+	 * @throws \RuntimeException
+	 */
+	public function votePoll(Participant $participant, Poll $poll, array $optionIds): array {
+		$numVotes = count($optionIds);
+		if ($numVotes !== count(array_unique($optionIds))) {
+			throw new \UnexpectedValueException();
+		}
+
+		if ($poll->getMaxVotes() !== Poll::MAX_VOTES_UNLIMITED
+			&& $poll->getMaxVotes() < $numVotes) {
+			throw new \OverflowException();
+		}
+
+		$maxOptionId = max(array_keys(json_decode($poll->getOptions(), true, 512, JSON_THROW_ON_ERROR)));
+		$maxVotedId = max($optionIds);
+		$minVotedId = min($optionIds);
+		if ($minVotedId < 0 || $maxVotedId > $maxOptionId) {
+			throw new \RangeException();
+		}
+
+		$votes = [];
+		$result = json_decode($poll->getVotes(), true);
+
+		$previousVotes = $this->voteMapper->findByPollIdForActor(
+			$poll->getId(),
+			$participant->getAttendee()->getActorType(),
+			$participant->getAttendee()->getActorId()
+		);
+
+		$numVoters = $poll->getNumVoters();
+		if ($previousVotes && $numVoters > 0) {
+			$numVoters--;
+		}
+
+		foreach ($previousVotes as $vote) {
+			$result[$vote->getOptionId()] ??= 1;
+			$result[$vote->getOptionId()] -= 1;
+		}
+
+		$this->connection->beginTransaction();
+		try {
+			$this->voteMapper->deleteVotesByActor(
+				$poll->getId(),
+				$participant->getAttendee()->getActorType(),
+				$participant->getAttendee()->getActorId()
+			);
+
+			if (!empty($optionIds)) {
+				$numVoters++;
+			}
+
+			foreach ($optionIds as $optionId) {
+				$vote = new Vote();
+				$vote->setPollId($poll->getId());
+				$vote->setRoomId($poll->getRoomId());
+				$vote->setActorType($participant->getAttendee()->getActorType());
+				$vote->setActorId($participant->getAttendee()->getActorId());
+				$vote->setDisplayName($participant->getAttendee()->getDisplayName());
+				$vote->setOptionId($optionId);
+				$this->voteMapper->insert($vote);
+
+				$result[$optionId] ??= 0;
+				$result[$optionId] += 1;
+				$votes[] = $vote;
+			}
+		} catch (\Exception $e) {
+			$this->connection->rollBack();
+			throw $e;
+		}
+		$this->connection->commit();
+
+		$this->updateResultCache($poll->getId());
+		$result = array_filter($result);
+		$poll->setVotes(json_encode($result));
+		$poll->setNumVoters($numVoters);
+
+		return $votes;
+	}
+
+	public function updateResultCache(int $pollId): void {
+		$resultQuery = $this->connection->getQueryBuilder();
+		$resultQuery->selectAlias(
+			$resultQuery->func()->concat(
+				$resultQuery->expr()->literal('"'),
+					'option_id',
+				$resultQuery->expr()->literal('":'),
+				$resultQuery->func()->count('id')
+				),
+				'colonseparatedvalue'
+			)
+			->from('talk_poll_votes')
+			->where($resultQuery->expr()->eq('poll_id', $resultQuery->createNamedParameter($pollId)))
+			->groupBy('option_id')
+			->orderBy('option_id', 'ASC');
+
+		$jsonQuery = $this->connection->getQueryBuilder();
+		$jsonQuery
+			->selectAlias(
+				$jsonQuery->func()->concat(
+					$jsonQuery->expr()->literal('{'),
+					$jsonQuery->func()->groupConcat('colonseparatedvalue'),
+					$jsonQuery->expr()->literal('}')
+				),
+				'json'
+			)
+			->from($jsonQuery->createFunction('(' . $resultQuery->getSQL() . ')'), 'json');
+
+		$subQuery = $this->connection->getQueryBuilder();
+		$subQuery->select('actor_type', 'actor_id')
+			->from('talk_poll_votes')
+			->where($subQuery->expr()->eq('poll_id', $subQuery->createNamedParameter($pollId)))
+			->groupBy('actor_type', 'actor_id');
+
+		$votersQuery = $this->connection->getQueryBuilder();
+		$votersQuery->select($votersQuery->func()->count('*'))
+			->from($votersQuery->createFunction('(' . $subQuery->getSQL() . ')'), 'voters');
+
+		$update = $this->connection->getQueryBuilder();
+		$update->update('talk_polls')
+			->set('votes', $jsonQuery->createFunction('(' . $jsonQuery->getSQL() . ')'))
+			->set('num_voters', $jsonQuery->createFunction('(' . $votersQuery->getSQL() . ')'))
+			->where($update->expr()->eq('id', $update->createNamedParameter($pollId, IQueryBuilder::PARAM_INT)));
+
+		$this->connection->beginTransaction();
+		try {
+			$update->executeStatement();
+		} catch (\Exception $e) {
+			$this->connection->rollBack();
+			throw $e;
+		}
+		$this->connection->commit();
+	}
+
+	public function deleteByRoomId(int $roomId): void {
+		$this->voteMapper->deleteByRoomId($roomId);
+		$this->pollMapper->deleteByRoomId($roomId);
+	}
+
+	public function updateDisplayNameForActor(string $actorType, string $actorId, string $displayName): void {
+		$update = $this->connection->getQueryBuilder();
+		$update->update('talk_polls')
+			->set('display_name', $update->createNamedParameter($displayName))
+			->where($update->expr()->eq('actor_type', $update->createNamedParameter($actorType)))
+			->andWhere($update->expr()->eq('actor_id', $update->createNamedParameter($actorId)));
+		$update->executeStatement();
+
+		$update = $this->connection->getQueryBuilder();
+		$update->update('talk_poll_votes')
+			->set('display_name', $update->createNamedParameter($displayName))
+			->where($update->expr()->eq('actor_type', $update->createNamedParameter($actorType)))
+			->andWhere($update->expr()->eq('actor_id', $update->createNamedParameter($actorId)));
+		$update->executeStatement();
+	}
+}
--- a/mkdocs.yml
+++ b/mkdocs.yml
@ -27,6 +27,7 @@ nav:
      - 'Call management': 'call.md'
      - 'Chat management': 'chat.md'
      - 'Reaction management': 'reaction.md'
+      - 'Poll management': 'poll.md'
      - 'Webinar management': 'webinar.md'
      - 'Settings': 'settings.md'
      - 'Integration by other apps': 'integration.md'
--- a/tests/integration/features/bootstrap/FeatureContext.php
+++ b/tests/integration/features/bootstrap/FeatureContext.php
@ -56,6 +56,8 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 	protected static $remoteToInviteId;
 	/** @var string[] */
 	protected static $inviteIdToRemote;
+	/** @var int[] */
+	protected static $questionToPollId;


 	protected static $permissionsMap = [
@ -148,6 +150,7 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 		self::$userToAttendeeId = [];
 		self::$textToMessageId = [];
 		self::$messageIdToText = [];
+		self::$questionToPollId = [];

 		$this->createdUsers = [];
 		$this->createdGroups = [];
@ -1511,6 +1514,171 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 		}
 	}

+	/**
+	 * @Then /^user "([^"]*)" creates a poll in room "([^"]*)" with (\d+)(?: \((v1)\))?$/
+	 *
+	 * @param string $user
+	 * @param string $identifier
+	 * @param string $statusCode
+	 * @param string $apiVersion
+	 */
+	public function createPoll(string $user, string $identifier, string $statusCode, string $apiVersion = 'v1', TableNode $formData = null): void {
+		$data = $formData->getRowsHash();
+		$data['options'] = json_decode($data['options'], true);
+		if ($data['resultMode'] === 'public') {
+			$data['resultMode'] = 0;
+		} elseif ($data['resultMode'] === 'hidden') {
+			$data['resultMode'] = 1;
+		} else {
+			throw new \Exception('Invalid result mode');
+		}
+		if ($data['maxVotes'] === 'unlimited') {
+			$data['maxVotes'] = 0;
+		}
+
+		$this->setCurrentUser($user);
+		$this->sendRequest(
+			'POST', '/apps/spreed/api/' . $apiVersion . '/poll/' . self::$identifierToToken[$identifier],
+			$data
+		);
+		$this->assertStatusCode($this->response, $statusCode);
+
+		if ($statusCode !== '201') {
+			return;
+		}
+
+		$response = $this->getDataFromResponse($this->response);
+		if (isset($response['id'])) {
+			self::$questionToPollId[$data['question']] = $response['id'];
+		}
+	}
+
+	/**
+	 * @Then /^user "([^"]*)" sees poll "([^"]*)" in room "([^"]*)" with (\d+)(?: \((v1)\))?$/
+	 *
+	 * @param string $user
+	 * @param string $question
+	 * @param string $identifier
+	 * @param string $statusCode
+	 * @param string $apiVersion
+	 * @param ?TableNode $formData
+	 */
+	public function userSeesPollInRoom(string $user, string $question, string $identifier, string $statusCode, string $apiVersion = 'v1', TableNode $formData = null): void {
+		$this->setCurrentUser($user);
+
+		$this->sendRequest('GET', '/apps/spreed/api/' . $apiVersion . '/poll/' . self::$identifierToToken[$identifier] . '/' . self::$questionToPollId[$question]);
+		$this->assertStatusCode($this->response, $statusCode);
+
+		$expected = $this->preparePollExpectedData($formData->getRowsHash());
+		$response = $this->getDataFromResponse($this->response);
+		$this->assertPollEquals($expected, $response);
+	}
+
+	/**
+	 * @Then /^user "([^"]*)" closes poll "([^"]*)" in room "([^"]*)" with (\d+)(?: \((v1)\))?$/
+	 *
+	 * @param string $user
+	 * @param string $question
+	 * @param string $identifier
+	 * @param string $statusCode
+	 * @param string $apiVersion
+	 * @param ?TableNode $formData
+	 */
+	public function userClosesPollInRoom(string $user, string $question, string $identifier, string $statusCode, string $apiVersion = 'v1', TableNode $formData = null): void {
+		$this->setCurrentUser($user);
+		$this->sendRequest('DELETE', '/apps/spreed/api/' . $apiVersion . '/poll/' . self::$identifierToToken[$identifier] . '/' . self::$questionToPollId[$question]);
+		$this->assertStatusCode($this->response, $statusCode);
+
+		if ($statusCode !== '200') {
+			return;
+		}
+
+		$expected = $this->preparePollExpectedData($formData->getRowsHash());
+		$response = $this->getDataFromResponse($this->response);
+		$this->assertPollEquals($expected, $response);
+	}
+
+	/**
+	 * @Then /^user "([^"]*)" votes for options "([^"]*)" on poll "([^"]*)" in room "([^"]*)" with (\d+)(?: \((v1)\))?$/
+	 *
+	 * @param string $user
+	 * @param string $options
+	 * @param string $question
+	 * @param string $identifier
+	 * @param string $statusCode
+	 * @param string $apiVersion
+	 * @param ?TableNode $formData
+	 */
+	public function userVotesPollInRoom(string $user, string $options, string $question, string $identifier, string $statusCode, string $apiVersion = 'v1', TableNode $formData = null): void {
+		$data = [
+			'optionIds' => json_decode($options, true),
+		];
+
+		$this->setCurrentUser($user);
+		$this->sendRequest(
+			'POST', '/apps/spreed/api/' . $apiVersion . '/poll/' . self::$identifierToToken[$identifier] . '/' . self::$questionToPollId[$question],
+			$data
+		);
+		$this->assertStatusCode($this->response, $statusCode);
+
+		if ($statusCode !== '200' && $statusCode !== '201') {
+			return;
+		}
+
+		$expected = $this->preparePollExpectedData($formData->getRowsHash());
+		$response = $this->getDataFromResponse($this->response);
+		$this->assertPollEquals($expected, $response);
+	}
+
+	protected function assertPollEquals(array $expected, array $response): void {
+		if (isset($expected['details'])) {
+			$response['details'] = array_map(static function (array $detail): array {
+				unset($detail['id']);
+				return $detail;
+			}, $response['details']);
+		}
+
+		Assert::assertEquals($expected, $response);
+	}
+
+	protected function preparePollExpectedData(array $expected): array {
+		if ($expected['resultMode'] === 'public') {
+			$expected['resultMode'] = 0;
+		} elseif ($expected['resultMode'] === 'hidden') {
+			$expected['resultMode'] = 1;
+		}
+		if ($expected['maxVotes'] === 'unlimited') {
+			$expected['maxVotes'] = 0;
+		}
+		if ($expected['status'] === 'open') {
+			$expected['status'] = 0;
+		} elseif ($expected['status'] === 'closed') {
+			$expected['status'] = 1;
+		}
+
+		if ($expected['votedSelf'] === 'not voted') {
+			$expected['votedSelf'] = [];
+		} else {
+			$expected['votedSelf'] = json_decode($expected['votedSelf'], true);
+		}
+
+		if (isset($expected['votes'])) {
+			$expected['votes'] = json_decode($expected['votes'], true);
+		}
+		if (isset($expected['details'])) {
+			$expected['details'] = json_decode($expected['details'], true);
+		}
+		$expected['numVoters'] = (int) $expected['numVoters'];
+		$expected['options'] = json_decode($expected['options'], true);
+
+		$result = preg_match('/POLL_ID\(([^)]+)\)/', $expected['id'], $matches);
+		if ($result) {
+			$expected['id'] = self::$questionToPollId[$matches[1]];
+		}
+
+		return $expected;
+	}
+
 	/**
 	 * @Then /^user "([^"]*)" deletes message "([^"]*)" from room "([^"]*)" with (\d+)(?: \((v1)\))?$/
 	 *
@ -1741,14 +1909,21 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 		$includeReactions = in_array('reactions', $formData->getRow(0), true);
 		$includeReactionsSelf = in_array('reactionsSelf', $formData->getRow(0), true);

-		$count = count($formData->getHash());
+		$expected = $formData->getHash();
+		$count = count($expected);
 		Assert::assertCount($count, $messages, 'Message count does not match');
 		for ($i = 0; $i < $count; $i++) {
-			if ($formData->getHash()[$i]['messageParameters'] === '"IGNORE"') {
+			if ($expected[$i]['messageParameters'] === '"IGNORE"') {
 				$messages[$i]['messageParameters'] = 'IGNORE';
 			}
+
+			$result = preg_match('/POLL_ID\(([^)]+)\)/', $expected[$i]['messageParameters'], $matches);
+			if ($result) {
+				$expected[$i]['messageParameters'] = str_replace($matches[0], self::$questionToPollId[$matches[1]], $expected[$i]['messageParameters']);
+			}
 		}
-		Assert::assertEquals($formData->getHash(), array_map(function ($message) use ($includeParents, $includeReferenceId, $includeReactions, $includeReactionsSelf) {
+
+		Assert::assertEquals($expected, array_map(function ($message) use ($includeParents, $includeReferenceId, $includeReactions, $includeReactionsSelf) {
 			$data = [
 				'room' => self::$tokenToIdentifier[$message['token']],
 				'actorType' => $message['actorType'],
--- a/tests/integration/features/chat/poll.feature
+++ b/tests/integration/features/chat/poll.feature
@ -0,0 +1,525 @@
+Feature: chat/poll
+  Background:
+    Given user "participant1" exists
+    Given user "participant2" exists
+
+  Scenario: Create a public poll without max votes limit
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" sees the following messages in room "room" with 200
+      | room | actorType | actorId      | actorDisplayName         | message   | messageParameters |
+      | room | users     | participant1 | participant1-displayname | {object}  | {"actor":{"type":"user","id":"participant1","name":"participant1-displayname"},"object":{"type":"talk-poll","id":POLL_ID(What is the question?),"name":"What is the question?"}} |
+    Then user "participant1" sees poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | []   |
+      | numVoters  | 0    |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | not voted |
+    Then user "participant1" votes for options "[1]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant1" sees poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant2" sees poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | [] |
+      | numVoters  | 0 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | not voted |
+    Then user "participant1" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1    |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | closed |
+      | votedSelf  | [1] |
+      | details    | [{"actorType":"users","actorId":"participant1","actorDisplayName":"participant1-displayname","optionId":1}] |
+    Then user "participant2" sees poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | closed |
+      | votedSelf  | not voted |
+      | details    | [{"actorType":"users","actorId":"participant1","actorDisplayName":"participant1-displayname","optionId":1}] |
+
+  Scenario: Participants can update their votes but only while open
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[0]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1}   |
+      | numVoters  | 1    |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [0] |
+    Then user "participant1" votes for options "[1]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1    |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant1" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1    |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | closed |
+      | votedSelf  | [1] |
+      | details    | [{"actorType":"users","actorId":"participant1","actorDisplayName":"participant1-displayname","optionId":1}] |
+    Then user "participant1" votes for options "[0]" on poll "What is the question?" in room "room" with 400
+
+  Scenario: Participants can only vote for valid options
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[-1]" on poll "What is the question?" in room "room" with 400
+    Then user "participant1" votes for options "[2]" on poll "What is the question?" in room "room" with 400
+
+  Scenario: Participants can not exceed the maxVotes
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | 1 |
+    Then user "participant1" votes for options "[0,1]" on poll "What is the question?" in room "room" with 400
+
+  Scenario: Participants can vote for multiple options
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[0,1]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1,"1":1} |
+      | numVoters  | 1    |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [0,1] |
+
+  Scenario: Participants can not vote for the same option multiple times
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[1,1]" on poll "What is the question?" in room "room" with 400
+
+  Scenario: Non-moderators can also create polls and close it themselves
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant2" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" sees the following messages in room "room" with 200
+      | room | actorType | actorId      | actorDisplayName         | message   | messageParameters |
+      | room | users     | participant2 | participant2-displayname | {object}  | {"actor":{"type":"user","id":"participant2","name":"participant2-displayname"},"object":{"type":"talk-poll","id":POLL_ID(What is the question?),"name":"What is the question?"}} |
+    Then user "participant2" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | [] |
+      | numVoters  | 0 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant2 |
+      | actorDisplayName    | participant2-displayname |
+      | status     | closed |
+      | votedSelf  | not voted |
+      | details    | {} |
+
+  Scenario: Non-moderators can note create polls without chat permission
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    # Removing chat permission only
+    Then user "participant1" sets permissions for "participant2" in room "room" to "CSJLAVP" with 200 (v4)
+    When user "participant2" creates a poll in room "room" with 403
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+
+  Scenario: Moderators can close polls of others
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant2" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | [] |
+      | numVoters  | 0 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant2 |
+      | actorDisplayName    | participant2-displayname |
+      | status     | closed |
+      | votedSelf  | not voted |
+      | details    | {} |
+
+  Scenario: There are system messages for opening, voting and closing on public polls
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[0]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1} |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [0] |
+    Then user "participant2" votes for options "[1]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1,"1":1} |
+      | numVoters  | 2 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant1" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1,"1":1} |
+      | numVoters  | 2 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | closed |
+      | votedSelf  | [0] |
+      | details    | [{"actorType":"users","actorId":"participant1","actorDisplayName":"participant1-displayname","optionId":0},{"actorType":"users","actorId":"participant2","actorDisplayName":"participant2-displayname","optionId":1}] |
+    Then user "participant1" sees the following system messages in room "room" with 200 (v1)
+      | room | actorType | actorId      | actorDisplayName         | systemMessage        |
+      | room | users     | participant1 | participant1-displayname | poll_closed          |
+      | room | users     | participant2 | participant2-displayname | poll_voted           |
+      | room | users     | participant1 | participant1-displayname | poll_voted           |
+      | room | users     | participant1 | participant1-displayname | user_added           |
+      | room | users     | participant1 | participant1-displayname | conversation_created |
+    Then user "participant1" sees the following messages in room "room" with 200 (v1)
+      | room | actorType | actorId      | actorDisplayName         | message  | messageParameters |
+      | room | users     | participant1 | participant1-displayname | {object} | {"actor":{"type":"user","id":"participant1","name":"participant1-displayname"},"object":{"type":"talk-poll","id":POLL_ID(What is the question?),"name":"What is the question?"}} |
+
+
+  Scenario: There are only system messages for opening and closing on hidden polls
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[0]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | [] |
+      | numVoters  | 0 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [0] |
+    Then user "participant2" votes for options "[1]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | [] |
+      | numVoters  | 0 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant1" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1,"1":1} |
+      | numVoters  | 2 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | closed |
+      | votedSelf  | [0] |
+    Then user "participant1" sees the following system messages in room "room" with 200 (v1)
+      | room | actorType | actorId      | actorDisplayName         | systemMessage        |
+      | room | users     | participant1 | participant1-displayname | poll_closed          |
+      | room | users     | participant1 | participant1-displayname | user_added           |
+      | room | users     | participant1 | participant1-displayname | conversation_created |
+    Then user "participant1" sees the following messages in room "room" with 200 (v1)
+      | room | actorType | actorId      | actorDisplayName         | message  | messageParameters |
+      | room | users     | participant1 | participant1-displayname | {object} | {"actor":{"type":"user","id":"participant1","name":"participant1-displayname"},"object":{"type":"talk-poll","id":POLL_ID(What is the question?),"name":"What is the question?"}} |
+
+  Scenario: Non-moderators can not close polls of others
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant2" closes poll "What is the question?" in room "room" with 403
+
+  Scenario: Votes and details are not accessible in hidden result mode
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+    Then user "participant1" sees the following messages in room "room" with 200
+      | room | actorType | actorId      | actorDisplayName         | message   | messageParameters |
+      | room | users     | participant1 | participant1-displayname | {object}  | {"actor":{"type":"user","id":"participant1","name":"participant1-displayname"},"object":{"type":"talk-poll","id":POLL_ID(What is the question?),"name":"What is the question?"}} |
+    Then user "participant2" votes for options "[1]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | []   |
+      | numVoters  | 0 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant1" sees poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | []   |
+      | numVoters  | 0 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | not voted |
+    Then user "participant2" sees poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | []   |
+      | numVoters  | 0 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant1" closes poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"1":1}   |
+      | numVoters  | 1 |
+      | resultMode | hidden |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | closed |
+      | votedSelf  | not voted |
+
+  Scenario: Number of voters and votes are restricted to the very same poll
+    Given user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    When user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    When user "participant1" creates a poll in room "room" with 201
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant1" votes for options "[0]" on poll "What is the question?" in room "room" with 200
+      | id         | POLL_ID(What is the question?) |
+      | question   | What is the question? |
+      | options    | ["Where are you?","How much is the fish?"] |
+      | votes      | {"0":1} |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant1 |
+      | actorDisplayName    | participant1-displayname |
+      | status     | open |
+      | votedSelf  | [0] |
+    When user "participant2" creates a poll in room "room" with 201
+      | question   | Another one ... |
+      | options    | ["... bites the dust!","... bites de_dust!"] |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+    Then user "participant2" votes for options "[1]" on poll "Another one ..." in room "room" with 200
+      | id         | POLL_ID(Another one ...) |
+      | question   | Another one ... |
+      | options    | ["... bites the dust!","... bites de_dust!"] |
+      | votes      | {"1":1} |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant2 |
+      | actorDisplayName    | participant2-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
+    Then user "participant2" sees poll "Another one ..." in room "room" with 200
+      | id         | POLL_ID(Another one ...) |
+      | question   | Another one ... |
+      | options    | ["... bites the dust!","... bites de_dust!"] |
+      | votes      | {"1":1} |
+      | numVoters  | 1 |
+      | resultMode | public |
+      | maxVotes   | unlimited |
+      | actorType  | users |
+      | actorId    | participant2 |
+      | actorDisplayName    | participant2-displayname |
+      | status     | open |
+      | votedSelf  | [1] |
--- a/tests/integration/spreedcheats/lib/Controller/ApiController.php
+++ b/tests/integration/spreedcheats/lib/Controller/ApiController.php
@ -74,6 +74,12 @@ class ApiController extends OCSController {
 		$delete = $this->db->getQueryBuilder();
 		$delete->delete('talk_rooms')->executeStatement();

+		$delete = $this->db->getQueryBuilder();
+		$delete->delete('talk_polls')->executeStatement();
+
+		$delete = $this->db->getQueryBuilder();
+		$delete->delete('talk_poll_votes')->executeStatement();
+
 		$delete = $this->db->getQueryBuilder();
 		$delete->delete('talk_sessions')->executeStatement();

--- a/tests/php/Chat/ChatManagerTest.php
+++ b/tests/php/Chat/ChatManagerTest.php
@ -33,6 +33,7 @@ use OCA\Talk\Participant;
 use OCA\Talk\Room;
 use OCA\Talk\Service\AttachmentService;
 use OCA\Talk\Service\ParticipantService;
+use OCA\Talk\Service\PollService;
 use OCA\Talk\Share\RoomShareProvider;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\Comments\IComment;
@ -64,6 +65,8 @@ class ChatManagerTest extends TestCase {
 	protected $shareProvider;
 	/** @var ParticipantService|MockObject */
 	protected $participantService;
+	/** @var PollService|MockObject */
+	protected $pollService;
 	/** @var Notifier|MockObject */
 	protected $notifier;
 	/** @var ITimeFactory|MockObject */
@ -81,6 +84,7 @@ class ChatManagerTest extends TestCase {
 		$this->shareManager = $this->createMock(IManager::class);
 		$this->shareProvider = $this->createMock(RoomShareProvider::class);
 		$this->participantService = $this->createMock(ParticipantService::class);
+		$this->pollService = $this->createMock(PollService::class);
 		$this->notifier = $this->createMock(Notifier::class);
 		$this->timeFactory = $this->createMock(ITimeFactory::class);
 		$this->attachmentService = $this->createMock(AttachmentService::class);
@ -94,6 +98,7 @@ class ChatManagerTest extends TestCase {
 			$this->shareManager,
 			$this->shareProvider,
 			$this->participantService,
+			$this->pollService,
 			$this->notifier,
 			$cacheFactory,
 			$this->timeFactory,
@ -118,6 +123,7 @@ class ChatManagerTest extends TestCase {
 					$this->shareManager,
 					$this->shareProvider,
 					$this->participantService,
+					$this->pollService,
 					$this->notifier,
 					$cacheFactory,
 					$this->timeFactory,
@ -135,6 +141,7 @@ class ChatManagerTest extends TestCase {
 			$this->shareManager,
 			$this->shareProvider,
 			$this->participantService,
+			$this->pollService,
 			$this->notifier,
 			$cacheFactory,
 			$this->timeFactory,