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wwwroot/js/storage/IndexedDBService.d.ts

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+import { ICalendarEvent } from '../types/CalendarTypes';
+/**
+ * Operation for the sync queue
+ */
+export interface IQueueOperation {
+    id: string;
+    type: 'create' | 'update' | 'delete';
+    eventId: string;
+    data: Partial<ICalendarEvent> | ICalendarEvent;
+    timestamp: number;
+    retryCount: number;
+}
+/**
+ * IndexedDB Service for Calendar App
+ * Handles local storage of events and sync queue
+ */
+export declare class IndexedDBService {
+    private static readonly DB_NAME;
+    private static readonly DB_VERSION;
+    private static readonly EVENTS_STORE;
+    private static readonly QUEUE_STORE;
+    private static readonly SYNC_STATE_STORE;
+    private db;
+    private initialized;
+    /**
+     * Initialize and open the database
+     */
+    initialize(): Promise<void>;
+    /**
+     * Check if database is initialized
+     */
+    isInitialized(): boolean;
+    /**
+     * Ensure database is initialized
+     */
+    private ensureDB;
+    /**
+     * Get a single event by ID
+     */
+    getEvent(id: string): Promise<ICalendarEvent | null>;
+    /**
+     * Get all events
+     */
+    getAllEvents(): Promise<ICalendarEvent[]>;
+    /**
+     * Save an event (create or update)
+     */
+    saveEvent(event: ICalendarEvent): Promise<void>;
+    /**
+     * Delete an event
+     */
+    deleteEvent(id: string): Promise<void>;
+    /**
+     * Add operation to queue
+     */
+    addToQueue(operation: Omit<IQueueOperation, 'id'>): Promise<void>;
+    /**
+     * Get all queue operations (sorted by timestamp)
+     */
+    getQueue(): Promise<IQueueOperation[]>;
+    /**
+     * Remove operation from queue
+     */
+    removeFromQueue(id: string): Promise<void>;
+    /**
+     * Clear entire queue
+     */
+    clearQueue(): Promise<void>;
+    /**
+     * Save sync state value
+     */
+    setSyncState(key: string, value: any): Promise<void>;
+    /**
+     * Get sync state value
+     */
+    getSyncState(key: string): Promise<any | null>;
+    /**
+     * Serialize event for IndexedDB storage (convert Dates to ISO strings)
+     */
+    private serializeEvent;
+    /**
+     * Deserialize event from IndexedDB (convert ISO strings to Dates)
+     */
+    private deserializeEvent;
+    /**
+     * Close database connection
+     */
+    close(): void;
+    /**
+     * Delete entire database (for testing/reset)
+     */
+    static deleteDatabase(): Promise<void>;
+    /**
+     * Seed IndexedDB with mock data if empty
+     */
+    seedIfEmpty(mockDataUrl?: string): Promise<void>;
+}