Improve Google Calendar task sync reliability

docs/releases/unreleased.md

@@ -23,3 +23,13 @@ Example:
 ```
 
 -->
+
+## Fixed
+
+- Persist failed Google Calendar task-event deletions in plugin data and retry them after restart or reconnect, preventing orphaned task events when a task file is deleted while Google cleanup fails or sync is not ready.
+- Track exported Google Calendar task events in plugin data so startup can recover cleanup for task files deleted while Obsidian was closed.
+- Persist Google Calendar task sync requests while Google Calendar is not ready and replay the current task state after reconnect for scheduled, due, or both-date calendar modes.
+- Restore cancelled Google Calendar event tombstones when a task is synced to an existing event ID, so deleted-but-still-addressable events become visible again.
+- Prevent duplicate Google Calendar task events when concurrent syncs race before the newly created event ID reaches Obsidian metadata.
+- Prevent pending intermediate status updates from overwriting completed Google Calendar task events when users quickly cycle a task to done.
+- Mark Google Calendar events as completed when tasks were already done before they became calendar-eligible.

src/bootstrap/pluginBootstrap.ts

@@ -270,10 +270,11 @@ export function initializeServicesLazily(plugin: TaskNotesPlugin): void {
 
 			plugin.taskCalendarSyncService = new (await import("../services/TaskCalendarSyncService"))
 				.TaskCalendarSyncService(plugin, plugin.googleCalendarService);
+			plugin.taskCalendarSyncService.startDeletionQueueProcessor();
 
 			plugin.registerEvent(
 				plugin.emitter.on("file-deleted", (data: FileDeletedEventData) => {
-					if (!plugin.taskCalendarSyncService?.isEnabled()) {
+					if (!plugin.taskCalendarSyncService) {
 						return;
 					}
 

src/components/BatchContextMenu.ts

@@ -334,7 +334,7 @@ export class BatchContextMenu {
 					const file = plugin.app.vault.getAbstractFileByPath(path);
 					if (file) {
 						// Delete from Google Calendar before trashing file
-						if (plugin.taskCalendarSyncService?.isEnabled()) {
+						if (plugin.taskCalendarSyncService) {
 							const task = await plugin.cacheManager.getTaskInfo(path);
 							if (task?.googleCalendarEventId) {
 								try {

src/components/TaskContextMenu.ts

@@ -466,14 +466,15 @@ export class TaskContextMenu {
 						});
 						if (confirmed) {
 							// Delete from Google Calendar before trashing file
-							if (plugin.taskCalendarSyncService?.isEnabled() && task.googleCalendarEventId) {
-								plugin.taskCalendarSyncService
-									.deleteTaskFromCalendarByPath(task.path, task.googleCalendarEventId)
-									.catch((error) => {
-										console.warn("Failed to delete task from Google Calendar:", error);
-									});
+							if (plugin.taskCalendarSyncService && task.googleCalendarEventId) {
+								try {
+									await plugin.taskCalendarSyncService
+										.deleteTaskFromCalendarByPath(task.path, task.googleCalendarEventId);
+								} catch (error) {
+									console.warn("Failed to delete task from Google Calendar:", error);
+								}
 							}
-							plugin.app.vault.trash(file, true);
+							await plugin.app.vault.trash(file, true);
 						}
 					});
 				});

src/services/GoogleCalendarService.ts

@@ -602,6 +602,9 @@ export class GoogleCalendarService extends CalendarProvider {
 
 			// Build update payload
 			const payload: any = { ...currentEvent };
+			if (payload.status === "cancelled") {
+				payload.status = "confirmed";
+			}
 
 			// Support both 'title' and 'summary'
 			if (updates.title !== undefined || updates.summary !== undefined) {