feat: Allow guests to contacts user via public profile "Talk to" link

lib/Controller/PageController.php

@@ -52,6 +52,7 @@
 use OCP\AppFramework\Http\Response;
 use OCP\AppFramework\Http\Template\PublicTemplateResponse;
 use OCP\AppFramework\Http\TemplateResponse;
+use OCP\AppFramework\Http\TooManyRequestsResponse;
 use OCP\AppFramework\Services\IInitialState;
 use OCP\Collaboration\Reference\RenderReferenceEvent;
 use OCP\Collaboration\Resources\LoadAdditionalScriptsEvent;
@@ -64,9 +65,14 @@
 use OCP\IRequest;
 use OCP\IURLGenerator;
 use OCP\IUser;
+use OCP\IUserManager;
 use OCP\IUserSession;
+use OCP\L10N\IFactory;
 use OCP\Notification\IManager as INotificationManager;
+use OCP\Profile\IProfileManager;
 use OCP\Security\Bruteforce\IThrottler;
+use OCP\Security\RateLimiting\ILimiter;
+use OCP\Security\RateLimiting\IRateLimitExceededException;
 use Psr\Log\LoggerInterface;
 
 #[IgnoreOpenAPI]
@@ -95,6 +101,10 @@ public function __construct(
 		Config $talkConfig,
 		IConfig $serverConfig,
 		IGroupManager $groupManager,
+		protected IUserManager $userManager,
+		protected IProfileManager $profileManager,
+		protected ILimiter $limiter,
+		protected IFactory $l10nFactory,
 	) {
 		parent::__construct($appName, $request);
 		$this->initialState = $initialState;
@@ -148,7 +158,7 @@ public function duplicateSession(): Response {
 	/**
 	 * @param string $token
 	 * @param string $callUser
-	 * @return TemplateResponse|RedirectResponse
+	 * @return TemplateResponse|RedirectResponse|TooManyRequestsResponse
 	 * @throws HintException
 	 */
 	#[NoCSRFRequired]
@@ -162,17 +172,66 @@ public function index(string $token = '', string $callUser = ''): Response {
 		return $this->pageHandler($token, $callUser);
 	}
 
+	/**
+	 * @throws \InvalidArgumentException
+	 */
+	protected function createContactRequestRoom(string $targetUserId): Room {
+		$user = $this->userManager->get($targetUserId);
+		if (!$user instanceof IUser) {
+			throw new \InvalidArgumentException('user');
+		}
+
+		if ($this->talkConfig->isNotAllowedToCreateConversations($user)) {
+			throw new \InvalidArgumentException('config');
+		}
+
+		if (!$this->profileManager->isProfileFieldVisible('talk', $user, null)) {
+			throw new \InvalidArgumentException('profile');
+		}
+
+		$l = $this->l10nFactory->get('spreed', $this->l10nFactory->getUserLanguage($user));
+
+		return $this->roomService->createConversation(
+			Room::TYPE_PUBLIC,
+			$l->t('Contact request'),
+			$user,
+		);
+	}
+
 	/**
 	 * @param string $token
 	 * @param string $callUser
 	 * @param string $password
-	 * @return TemplateResponse|RedirectResponse
+	 * @return TemplateResponse|RedirectResponse|TooManyRequestsResponse
 	 * @throws HintException
 	 */
 	protected function pageHandler(string $token = '', string $callUser = '', string $password = ''): Response {
 		$bruteForceToken = $token;
 		$user = $this->userSession->getUser();
 		if (!$user instanceof IUser) {
+			if ($token === '') {
+				try {
+					$this->limiter->registerAnonRequest(
+						'create-anonymous-conversation',
+						5, // Five conversations
+						60 * 60, // Per hour
+						$this->request->getRemoteAddress(),
+					);
+				} catch (IRateLimitExceededException) {
+					return new TooManyRequestsResponse();
+				}
+
+				try {
+					$room = $this->createContactRequestRoom($callUser);
+				} catch (\InvalidArgumentException) {
+					$response = new TemplateResponse('core', '404-profile', [], TemplateResponse::RENDER_AS_GUEST);
+					$response->throttle(['action' => 'callUser', 'callUser' => $callUser]);
+					return $response;
+				}
+
+				return $this->redirectToConversation($room->getToken());
+			}
+
 			return $this->guestEnterRoom($token, $password);
 		}
 

lib/Profile/TalkAction.php

@@ -63,9 +63,10 @@ public function getDisplayId(): string {
 
 	public function getTitle(): string {
 		$visitingUser = $this->userSession->getUser();
-		if (!$visitingUser || $visitingUser === $this->targetUser) {
+		if ($visitingUser === $this->targetUser) {
 			return $this->l->t('Open Talk');
 		}
+
 		return $this->l->t('Talk to %s', [$this->targetUser->getDisplayName()]);
 	}
 
@@ -78,17 +79,23 @@ public function getIcon(): string {
 	}
 
 	public function getTarget(): ?string {
-		$visitingUser = $this->userSession->getUser();
-		if (
-			!$visitingUser
-			|| $this->config->isDisabledForUser($this->targetUser)
-			|| $this->config->isDisabledForUser($visitingUser)
-		) {
+		if ($this->config->isDisabledForUser($this->targetUser)) {
 			return null;
 		}
+
+		$visitingUser = $this->userSession->getUser();
 		if ($visitingUser === $this->targetUser) {
 			return $this->urlGenerator->linkToRouteAbsolute('spreed.Page.index');
 		}
+
+		if ($visitingUser && $this->config->isDisabledForUser($visitingUser)) {
+			return null;
+		}
+
+		if (!$visitingUser && $this->config->isNotAllowedToCreateConversations($this->targetUser)) {
+			return null;
+		}
+
 		return $this->urlGenerator->linkToRouteAbsolute('spreed.Page.index') . '?callUser=' . $this->targetUser->getUID();
 	}
 }