Notify board members about moved cards according to their Deck setting

Replaces the yes/no notify_email flag with notify_mode:
- off:   no mail
- owner: only the board owner, as before (migrated from notify_email=1)
- board: everyone with access to the board, filtered by their own Deck
         "Notifications" setting for it (board:<id>:notify-due: off /
         assigned / all), mirroring Deck's NotificationHelper rules

Recipients are resolved via PermissionService::findUsers() (owner, ACL,
groups and circles expanded), AssignmentMapper::isUserAssigned() and
IConfig, none of which reads Deck's frozen $userId. If they cannot be
resolved, no mail is sent rather than one to the wrong people.

Moved cards are collected over the whole run and each recipient gets a
single digest mail afterwards, in their own language.

Bumps to 35.2.0 so the migrations run.

lib/Controller/WorkflowController.php

@@ -8,6 +8,7 @@ use OCA\WorkflowDeckAutomation\Db\Workflow;
 use OCA\WorkflowDeckAutomation\Db\WorkflowMapper;
 use OCA\WorkflowDeckAutomation\Service\DeckIntegrationService;
 use OCA\WorkflowDeckAutomation\Service\DeckUnavailableException;
+use OCA\WorkflowDeckAutomation\Service\NotificationPolicy;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\Attribute\NoAdminRequired;
@@ -55,14 +56,14 @@ class WorkflowController extends OCSController {
 		int $boardId,
 		int $sourceStackId,
 		int $targetStackId,
-		bool $notifyEmail = false,
+		string $notifyMode = NotificationPolicy::MODE_OFF,
 		bool $enabled = true,
 	): DataResponse {
-		$this->validate($title, $boardId, $sourceStackId, $targetStackId);
+		$this->validate($title, $boardId, $sourceStackId, $targetStackId, $notifyMode);
 
 		$workflow = new Workflow();
 		$workflow->setUserId($this->currentUserId());
-		$this->applyFields($workflow, $title, $boardId, $sourceStackId, $targetStackId, $notifyEmail, $enabled);
+		$this->applyFields($workflow, $title, $boardId, $sourceStackId, $targetStackId, $notifyMode, $enabled);
 
 		$workflow = $this->workflowMapper->insert($workflow);
 		return new DataResponse($workflow->jsonSerialize(), Http::STATUS_CREATED);
@@ -75,16 +76,16 @@ class WorkflowController extends OCSController {
 		int $boardId,
 		int $sourceStackId,
 		int $targetStackId,
-		bool $notifyEmail = false,
+		string $notifyMode = NotificationPolicy::MODE_OFF,
 		bool $enabled = true,
 	): DataResponse {
 		$workflow = $this->findOwnWorkflow($id);
-		$this->validate($title, $boardId, $sourceStackId, $targetStackId);
+		$this->validate($title, $boardId, $sourceStackId, $targetStackId, $notifyMode);
 
 		// Kept in step with the board owner so the job runs as, and mails,
 		// the right user; validate() made sure the editor owns the board.
 		$workflow->setUserId($this->currentUserId());
-		$this->applyFields($workflow, $title, $boardId, $sourceStackId, $targetStackId, $notifyEmail, $enabled);
+		$this->applyFields($workflow, $title, $boardId, $sourceStackId, $targetStackId, $notifyMode, $enabled);
 		$workflow = $this->workflowMapper->update($workflow);
 
 		return new DataResponse($workflow->jsonSerialize());
@@ -155,13 +156,16 @@ class WorkflowController extends OCSController {
 		}
 	}
 
-	private function validate(string $title, int $boardId, int $sourceStackId, int $targetStackId): void {
+	private function validate(string $title, int $boardId, int $sourceStackId, int $targetStackId, string $notifyMode): void {
 		if (trim($title) === '') {
 			throw new OCSBadRequestException('Title must not be empty');
 		}
 		if ($sourceStackId === $targetStackId) {
 			throw new OCSBadRequestException('Source and target stack must differ');
 		}
+		if (!NotificationPolicy::isValidMode($notifyMode)) {
+			throw new OCSBadRequestException('Notification mode must be one of: ' . implode(', ', NotificationPolicy::MODES));
+		}
 
 		// Reject references to boards or stacks that are gone (or were never
 		// the user's) instead of storing a workflow that can only fail later.
@@ -198,14 +202,14 @@ class WorkflowController extends OCSController {
 		int $boardId,
 		int $sourceStackId,
 		int $targetStackId,
-		bool $notifyEmail,
+		string $notifyMode,
 		bool $enabled,
 	): void {
 		$workflow->setTitle($title);
 		$workflow->setBoardId($boardId);
 		$workflow->setSourceStackId($sourceStackId);
 		$workflow->setTargetStackId($targetStackId);
-		$workflow->setNotifyEmail($notifyEmail);
+		$workflow->setNotifyMode($notifyMode);
 		$workflow->setEnabled($enabled);
 	}
 }