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import { useErrorHandler, useSuccessHandler } from './useErrorHandler';
import i18n from '@/lib/i18n';
export interface ConnectionState {
isOnline: boolean;
isConnecting: boolean;
lastOnline: Date | null;
lastSync: Date | null;
retryCount: number;
connectionQuality: 'excellent' | 'good' | 'poor' | 'offline';
}
export interface SyncState {
isSyncing: boolean;
lastSyncAttempt: Date | null;
syncError: string | null;
pendingChanges: number;
}
export function useConnectionStatus() {
const [connectionState, setConnectionState] = useState<ConnectionState>({
isOnline: typeof navigator !== 'undefined' ? navigator.onLine : true,
isConnecting: false,
lastOnline: null,
lastSync: null,
retryCount: 0,
connectionQuality: 'excellent'});
const { handleNetworkError } = useErrorHandler();
const { showSuccess, showWarning } = useSuccessHandler();
// Test connection quality
const testConnectionQuality = useCallback(async (): Promise<'excellent' | 'good' | 'poor' | 'offline'> => {
if (!navigator.onLine) return 'offline';
try {
const start = performance.now();
const response = await fetch('/api/health', {
method: 'HEAD',
cache: 'no-cache'});
const end = performance.now();
const latency = end - start;
if (!response.ok) return 'poor';
if (latency < 100) return 'excellent';
if (latency < 300) return 'good';
return 'poor';
} catch {
return 'offline';
}
}, []);
// Update connection state
const updateConnectionState = useCallback(async () => {
const isOnline = navigator.onLine;
const quality = await testConnectionQuality();
setConnectionState(prev => ({
...prev,
isOnline,
connectionQuality: quality,
lastOnline: isOnline ? new Date() : prev.lastOnline,
retryCount: isOnline ? 0 : prev.retryCount}));
}, [testConnectionQuality]);
// Handle connection events
useEffect(() => {
const handleOnline = () => {
setConnectionState(prev => ({
...prev,
isOnline: true,
lastOnline: new Date(),
retryCount: 0}));
showSuccess('Connection restored', {
title: 'Back Online',
duration: 3000});
// Test quality after coming back online
updateConnectionState();
};
const handleOffline = () => {
setConnectionState(prev => ({
...prev,
isOnline: false,
connectionQuality: 'offline'}));
showWarning('Connection lost', {
title: 'Offline',
duration: 5000});
};
window.addEventListener('online', handleOnline);
window.addEventListener('offline', handleOffline);
// Initial connection test
updateConnectionState();
// Periodic connection quality checks
const qualityCheckInterval = setInterval(updateConnectionState, 30000); // Every 30 seconds
return () => {
window.removeEventListener('online', handleOnline);
window.removeEventListener('offline', handleOffline);
clearInterval(qualityCheckInterval);
};
}, [updateConnectionState, showSuccess, showWarning]);
// Retry connection
const retryConnection = useCallback(async () => {
setConnectionState(prev => ({
...prev,
isConnecting: true,
retryCount: prev.retryCount + 1}));
try {
await updateConnectionState();
} catch (_error) {
handleNetworkError(_error);
} finally {
setConnectionState(prev => ({
...prev,
isConnecting: false}));
}
}, [updateConnectionState, handleNetworkError]);
return {
...connectionState,
retryConnection,
updateConnectionState};
}
export function useSyncStatus() {
const [syncState, setSyncState] = useState<SyncState>({
isSyncing: false,
lastSyncAttempt: null,
syncError: null,
pendingChanges: 0});
const { handleApiError } = useErrorHandler();
const { showSuccess } = useSuccessHandler();
// Sync function
const sync = useCallback(async (syncFunction: () => Promise<void>) => {
setSyncState(prev => ({
...prev,
isSyncing: true,
lastSyncAttempt: new Date(),
syncError: null}));
try {
await syncFunction();
setSyncState(prev => ({
...prev,
isSyncing: false,
pendingChanges: 0,
syncError: null}));
showSuccess('Data synchronized successfully', {
title: 'Sync Complete',
duration: 3000});
} catch (_error) {
const errorMessage = _error instanceof Error ? _error.message : 'Sync failed';
setSyncState(prev => ({
...prev,
isSyncing: false,
syncError: errorMessage}));
handleApiError(_error, 'Sync');
}
}, [handleApiError, showSuccess]);
// Add pending change
const addPendingChange = useCallback(() => {
setSyncState(prev => ({
...prev,
pendingChanges: prev.pendingChanges + 1}));
}, []);
// Clear pending changes
const clearPendingChanges = useCallback(() => {
setSyncState(prev => ({
...prev,
pendingChanges: 0}));
}, []);
// Auto-sync when coming back online
const { isOnline } = useConnectionStatus();
useEffect(() => {
if (isOnline && syncState.pendingChanges > 0 && !syncState.isSyncing) {
// Auto-sync after a short delay when coming back online
const autoSyncTimer = setTimeout(() => {
// This would trigger auto-sync if implemented
console.log('Auto-sync triggered due to pending changes');
}, 2000);
return () => clearTimeout(autoSyncTimer);
}
}, [isOnline, syncState.pendingChanges, syncState.isSyncing]);
return {
...syncState,
sync,
addPendingChange,
clearPendingChanges};
}
// Hook for offline-first data management
/* eslint-disable @typescript-eslint/no-unused-vars */
export function useOfflineData<T>(
key: string,
fetchFunction: () => Promise<T>,
options: {
syncOnReconnect?: boolean;
maxAge?: number; // in milliseconds
} = {}
) {
const { syncOnReconnect = true, maxAge = 5 * 60 * 1000 } = options; // 5 minutes default
const [data, setData] = useState<T | null>(null);
const [isLoading, setIsLoading] = useState(false);
const [error, setError] = useState<string | null>(null);
const [lastFetch, setLastFetch] = useState<Date | null>(null);
const { isOnline } = useConnectionStatus();
const { handleApiError } = useErrorHandler();
// Load data from localStorage
const loadFromCache = useCallback(() => {
try {
const cached = localStorage.getItem(`offline_${key}`);
if (cached) {
const { data: cachedData, timestamp } = JSON.parse(cached);
const age = Date.now() - timestamp;
if (age < maxAge) {
setData(cachedData);
setLastFetch(new Date(timestamp));
return true;
}
}
} catch (_error) {
}
return false;
}, [key, maxAge]);
// Save data to localStorage
const saveToCache = useCallback((data: T) => {
try {
localStorage.setItem(`offline_${key}`, JSON.stringify({
data,
timestamp: Date.now()}));
} catch (_error) {
}
}, [key]);
// Fetch fresh data
const fetchData = useCallback(async (force = false) => {
if (!isOnline && !force) {
return loadFromCache();
}
setIsLoading(true);
setError(null);
try {
const freshData = await fetchFunction();
setData(freshData);
setLastFetch(new Date());
saveToCache(freshData);
return true;
} catch (_error) {
const errorMessage = _error instanceof Error ? _error.message : i18n.t('common.serverError');
setError(errorMessage);
handleApiError(_error, `Fetch ${key}`);
// Fall back to cache if available
return loadFromCache();
} finally {
setIsLoading(false);
}
}, [isOnline, fetchFunction, loadFromCache, saveToCache, handleApiError, key]);
// Initial load
useEffect(() => {
if (!data) {
fetchData();
}
}, [data, fetchData]);
// Sync when coming back online
useEffect(() => {
if (isOnline && syncOnReconnect && data && lastFetch) {
const age = Date.now() - lastFetch.getTime();
if (age > maxAge) {
fetchData();
}
}
}, [isOnline, syncOnReconnect, data, lastFetch, maxAge, fetchData]);
const refresh = useCallback(() => fetchData(true), [fetchData]);
return {
data,
isLoading,
error,
lastFetch,
isStale: lastFetch ? (Date.now() - lastFetch.getTime()) > maxAge : true,
refresh,
isOnline};
}
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