feat: add task management features to calendar

lib/jmap/client-interface.ts

@@ -1,4 +1,4 @@
-import type { Email, Mailbox, StateChange, AccountStates, Thread, Identity, EmailAddress, ContactCard, AddressBook, VacationResponse, Calendar, CalendarEvent, CalendarEventFilter, FileNode } from "./types";
+import type { Email, Mailbox, StateChange, AccountStates, Thread, Identity, EmailAddress, ContactCard, AddressBook, VacationResponse, Calendar, CalendarEvent, CalendarEventFilter, CalendarTask, FileNode } from "./types";
 import type { SieveScript, SieveCapabilities } from "./sieve-types";
 
 /**
@@ -201,6 +201,12 @@ export interface IJMAPClient {
   queryAllCalendarEvents(filter: CalendarEventFilter, sort?: Array<{ property: string; isAscending: boolean }>, limit?: number): Promise<CalendarEvent[]>;
   parseCalendarEvents(accountId: string, blobId: string): Promise<Partial<CalendarEvent>[]>;
 
+  // ── Calendar Tasks ────────────────────────────────────────────
+  getCalendarTasks(calendarIds?: string[], targetAccountId?: string): Promise<CalendarTask[]>;
+  createCalendarTask(task: Partial<CalendarTask>, targetAccountId?: string): Promise<CalendarTask>;
+  updateCalendarTask(taskId: string, updates: Partial<CalendarTask>, targetAccountId?: string): Promise<void>;
+  deleteCalendarTask(taskId: string, targetAccountId?: string): Promise<void>;
+
   // ── Sieve / Filters ──────────────────────────────────────────
   getSieveAccountId(): string;
   getSieveCapabilities(): SieveCapabilities | null;

lib/jmap/client.ts

@@ -1,4 +1,4 @@
-import type { Email, Mailbox, StateChange, AccountStates, Thread, Identity, EmailAddress, ContactCard, AddressBook, VacationResponse, Calendar, CalendarEvent, CalendarEventFilter, FileNode, FileNodeFilter } from "./types";
+import type { Email, Mailbox, StateChange, AccountStates, Thread, Identity, EmailAddress, ContactCard, AddressBook, VacationResponse, Calendar, CalendarEvent, CalendarEventFilter, CalendarTask, FileNode, FileNodeFilter } from "./types";
 import type { SieveScript, SieveCapabilities } from "./sieve-types";
 import type { IJMAPClient } from "./client-interface";
 import { toWildcardQuery } from "./search-utils";
@@ -3173,6 +3173,34 @@ export class JMAPClient implements IJMAPClient {
     return { destroyed, notDestroyed };
   }
 
+  // ─── Calendar Tasks (JSCalendar Task objects via CalendarEvent endpoints) ───
+
+  async getCalendarTasks(calendarIds?: string[], targetAccountId?: string): Promise<CalendarTask[]> {
+    try {
+      const events = await this.getCalendarEvents(calendarIds, targetAccountId);
+      return events.filter((e): e is CalendarTask & CalendarEvent =>
+        (e as unknown as CalendarTask)['@type'] === 'Task'
+      ) as unknown as CalendarTask[];
+    } catch (error) {
+      console.error('Failed to get calendar tasks:', error);
+      return [];
+    }
+  }
+
+  async createCalendarTask(task: Partial<CalendarTask>, targetAccountId?: string): Promise<CalendarTask> {
+    const event = { ...task, '@type': 'Task' } as unknown as Partial<CalendarEvent>;
+    const created = await this.createCalendarEvent(event, false, targetAccountId);
+    return created as unknown as CalendarTask;
+  }
+
+  async updateCalendarTask(taskId: string, updates: Partial<CalendarTask>, targetAccountId?: string): Promise<void> {
+    await this.updateCalendarEvent(taskId, updates as unknown as Partial<CalendarEvent>, false, targetAccountId);
+  }
+
+  async deleteCalendarTask(taskId: string, targetAccountId?: string): Promise<void> {
+    await this.deleteCalendarEvent(taskId, false, targetAccountId);
+  }
+
   // ─── JMAP FileNode methods (draft-ietf-jmap-filenode) ───
 
   supportsFiles(): boolean {