src/lib/components/GoogleAuthButton.svelte

@@ -6,12 +6,14 @@
 	let { 
 		onSuccess, 
 		onError, 
+		onDisconnect,
 		disabled = false,
 		size = 'default',
 		variant = 'primary'
 	} = $props<{
 		onSuccess?: (token: string) => void;
 		onError?: (error: string) => void;
+		onDisconnect?: () => void;
 		disabled?: boolean;
 		size?: 'small' | 'default' | 'large';
 		variant?: 'primary' | 'secondary';
@@ -21,8 +23,8 @@
 	let authState = $state(createGoogleAuthState());
 	let authManager = new GoogleAuthManager(authState);
 
-	onMount(() => {
+	onMount(async () => {
-		authManager.checkConnection();
+		await authManager.checkConnection();
 	});
 
 	async function handleConnect() {
@@ -41,6 +43,7 @@
 
 	async function handleDisconnect() {
 		await authManager.disconnectGoogle();
+		onDisconnect?.();
 	}
 
 	// Size classes
@@ -57,7 +60,14 @@
 	};
 </script>
 
-{#if authState.isConnected}
+{#if authState.checking}
+	<div class="flex items-center gap-3">
+		<div class="flex items-center gap-2 rounded-full bg-gray-100 px-3 py-1 border border-gray-300 whitespace-nowrap">
+			<div class="w-4 h-4 animate-spin rounded-full border-2 border-current border-t-transparent text-gray-600"></div>
+			<span class="text-sm font-medium text-gray-800">Checking connection...</span>
+		</div>
+	</div>
+{:else if authState.isConnected}
 	<div class="flex flex-wrap items-center gap-3">
 		<div class="flex items-center gap-2 rounded-full bg-green-100 px-3 py-1 border border-green-300 whitespace-nowrap">
 			<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 text-green-600" viewBox="0 0 20 20" fill="currentColor">

src/lib/google/auth/manager.ts

@@ -30,7 +30,7 @@ export class GoogleAuthManager {
 		this.state = state;
 	}
 
-	checkConnection(): void {
+	async checkConnection(): Promise<void> {
 		this.state.checking = true;
 		this.state.error = null;
 
@@ -38,12 +38,39 @@ export class GoogleAuthManager {
 			const token = localStorage.getItem('google_refresh_token');
 			const email = localStorage.getItem('google_user_email');
 
-			this.state.isConnected = !!token;
+			if (!token) {
-			this.state.token = token;
+				this.state.isConnected = false;
-			this.state.userEmail = email;
+				this.state.token = null;
+				this.state.userEmail = null;
+				return;
+			}
+
+			// Verify the token by calling our backend endpoint
+			const response = await fetch('/private/api/google/auth/check', {
+				method: 'POST',
+				headers: {
+					'Content-Type': 'application/json'
+				},
+				body: JSON.stringify({ refreshToken: token })
+			});
+
+			if (response.ok) {
+				this.state.isConnected = true;
+				this.state.token = token;
+				this.state.userEmail = email;
+			} else {
+				// Token is invalid or expired
+				await this.disconnectGoogle();
+				if (response.status === 401) {
+					this.state.error = 'Google session expired. Please reconnect.';
+				} else {
+					this.state.error = 'Failed to verify connection.';
+				}
+			}
 		} catch (error) {
 			console.error('Error checking connection:', error);
-			this.state.error = 'Failed to check connection status';
+			this.state.error = 'Failed to verify connection status';
+			this.state.isConnected = false;
 		} finally {
 			this.state.checking = false;
 		}

src/lib/google/sheets/server.ts

@@ -51,25 +51,48 @@ export async function getRecentSpreadsheets(
  * Get data from a Google Sheet
  * @param refreshToken - Google refresh token
  * @param spreadsheetId - ID of the spreadsheet
- * @param range - Cell range to retrieve (default: A1:Z10)
+ * @param range - Optional cell range. If not provided, it will fetch the entire first sheet.
  * @returns Sheet data as a 2D array
  */
 export async function getSpreadsheetData(
-  refreshToken: string,
+	refreshToken: string,
-  spreadsheetId: string,
+	spreadsheetId: string,
-  range: string = 'A1:Z10'
+	range?: string
 ): Promise<SheetData> {
-  const oauth = getAuthenticatedClient(refreshToken);
+	const oauth = getAuthenticatedClient(refreshToken);
-  const sheets = google.sheets({ version: 'v4', auth: oauth });
+	const sheets = google.sheets({ version: 'v4', auth: oauth });
 
-  const response = await sheets.spreadsheets.values.get({
+	let effectiveRange = range;
-    spreadsheetId,
-    range
-  });
 
-  return {
+	// If no range is provided, get the name of the first sheet and use that as the range
-    values: response.data.values || []
+	// to fetch all its content.
-  };
+	if (!effectiveRange) {
+		try {
+			const info = await getSpreadsheetInfo(refreshToken, spreadsheetId);
+			const firstSheetName = info.sheets?.[0]?.properties?.title;
+
+			if (firstSheetName) {
+				// To use a sheet name as a range, it must be quoted if it contains spaces or special characters.
+				effectiveRange = `'${firstSheetName}'`;
+			} else {
+				// Fallback if sheet name can't be determined.
+				effectiveRange = 'A1:Z1000'; // A sensible default for a large preview
+			}
+		} catch (error) {
+			console.error(`Failed to get sheet info for spreadsheet ${spreadsheetId}`, error);
+			// Fallback if the info call fails
+			effectiveRange = 'A1:Z1000';
+		}
+	}
+
+	const response = await sheets.spreadsheets.values.get({
+		spreadsheetId,
+		range: effectiveRange
+	});
+
+	return {
+		values: response.data.values || []
+	};
 }
 
 /**

src/routes/private/api/google/auth/check/+server.ts

@@ -0,0 +1,32 @@
+import { json } from '@sveltejs/kit';
+import { getAuthenticatedClient } from '$lib/google/auth/server';
+
+/**
+ * @description Verify the validity of a Google refresh token
+ * @method POST
+ * @param {Request} request
+ * @returns {Response}
+ */
+export async function POST({ request }: { request: Request }): Promise<Response> {
+	try {
+		const { refreshToken } = await request.json();
+
+		if (!refreshToken) {
+			return json({ error: 'Refresh token is required' }, { status: 400 });
+		}
+
+		// Get an authenticated client. This will attempt to get a new access token,
+		// which effectively validates the refresh token.
+		const oauth2Client = getAuthenticatedClient(refreshToken);
+
+		// Attempt to get a new access token
+		await oauth2Client.getAccessToken();
+
+		// If no error is thrown, the token is valid
+		return json({ success: true });
+	} catch (error) {
+		console.error('Failed to verify Google refresh token:', error);
+		// The token is likely invalid or revoked
+		return json({ error: 'Invalid or expired refresh token' }, { status: 401 });
+	}
+}

src/routes/private/api/google/sheets/[sheetId]/data/+server.ts

@@ -2,17 +2,18 @@ import { json } from '@sveltejs/kit';
 import type { RequestHandler } from './$types';
 import { googleSheetsServer } from '$lib/google/sheets/server.js';
 
-export const GET: RequestHandler = async ({ params, request }) => {
+export const GET: RequestHandler = async ({ params, request, url }) => {
 	try {
 		const { sheetId } = params;
 		const authHeader = request.headers.get('authorization');
-		
+		const range = url.searchParams.get('range') || undefined;
+
 		if (!authHeader?.startsWith('Bearer ')) {
 			return json({ error: 'Missing or invalid authorization header' }, { status: 401 });
 		}
 
 		const refreshToken = authHeader.slice(7);
-		const sheetData = await googleSheetsServer.getSpreadsheetData(refreshToken, sheetId, 'A1:Z10');
+		const sheetData = await googleSheetsServer.getSpreadsheetData(refreshToken, sheetId, range);
 
 		return json(sheetData);
 	} catch (error) {

src/routes/private/events/event/new/+page.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
-	import { isTokenValid, getUserInfo, revokeToken } from '$lib/google/auth/client.js';
 	import type { GoogleSheet } from '$lib/google/sheets/types.ts';
 	import { goto } from '$app/navigation';
 	import { toast } from '$lib/stores/toast.js';
@@ -16,19 +15,11 @@
 	let { data } = $props();
 
 	// Step management
-	let currentStep = $state(0); // Start at step 0 for Google auth check
+	let currentStep = $state(0);
-	const totalSteps = 4; // Increased to include auth step
+	const totalSteps = 4;
 
 	// Step 0: Google Auth
-	let authData = $state({
+	let isGoogleConnected = $state(false);
-		isConnected: false,
-		checking: true,
-		connecting: false,
-		showCancelOption: false,
-		token: null as string | null,
-		error: null as string | null,
-		userEmail: null as string | null
-	});
 
 	// Step 1: Event Details
 	let eventData = $state({
@@ -42,13 +33,13 @@
 		selectedSheet: null as GoogleSheet | null,
 		sheetData: [] as string[][],
 		columnMapping: {
-			name: 0, // Initialize to 0 (no column selected)
+			name: 0,
 			surname: 0,
 			email: 0,
 			confirmation: 0
 		},
 		loading: false,
-		expandedSheetList: true // Add this flag to control sheet list expansion
+		expandedSheetList: true
 	});
 
 	// Step 3: Email
@@ -62,189 +53,11 @@
 	let errors = $state<Record<string, string>>({});
 
 	onMount(async () => {
-		// Check Google auth status on mount
-		await checkGoogleAuth();
-
 		if (currentStep === 2) {
 			await loadRecentSheets();
 		}
 	});
 
-	// Google Auth functions
-	async function checkGoogleAuth() {
-		authData.checking = true;
-		try {
-			const accessToken = localStorage.getItem('google_access_token');
-			const refreshToken = localStorage.getItem('google_refresh_token');
-
-			if (accessToken && refreshToken) {
-				// Check if token is still valid
-				const isValid = await isTokenValid(accessToken);
-				authData.isConnected = isValid;
-				authData.token = accessToken;
-
-				if (isValid) {
-					// Fetch user info
-					await fetchUserInfo(accessToken);
-				}
-			} else {
-				authData.isConnected = false;
-				authData.userEmail = null;
-			}
-		} catch (error) {
-			console.error('Error checking Google auth:', error);
-			authData.isConnected = false;
-			authData.error = 'Error checking Google connection';
-			authData.userEmail = null;
-		} finally {
-			authData.checking = false;
-		}
-	}
-
-	async function connectToGoogle() {
-		authData.error = '';
-		authData.connecting = true;
-
-		try {
-			// Open popup window for OAuth
-			const popup = window.open(
-				'/auth/google',
-				'google-auth',
-				'width=500,height=600,scrollbars=yes,resizable=yes,left=' +
-					Math.round(window.screen.width / 2 - 250) +
-					',top=' +
-					Math.round(window.screen.height / 2 - 300)
-			);
-
-			if (!popup) {
-				authData.error = 'Failed to open popup window. Please allow popups for this site.';
-				authData.connecting = false;
-				return;
-			}
-
-			let authCompleted = false;
-			let popupTimer: number | null = null;
-			let cancelTimeout: number | null = null;
-
-			// Store current timestamp to detect changes in localStorage
-			const startTimestamp = localStorage.getItem('google_auth_timestamp') || '0';
-
-			// Poll localStorage for auth completion
-			const pollInterval = setInterval(() => {
-				try {
-					const currentTimestamp = localStorage.getItem('google_auth_timestamp');
-
-					// If timestamp has changed, auth is complete
-					if (currentTimestamp && currentTimestamp !== startTimestamp) {
-						handleAuthSuccess();
-					}
-				} catch (e) {
-					console.error('Error checking auth timestamp:', e);
-				}
-			}, 500); // Poll every 500ms
-
-			// Common handler for authentication success
-			function handleAuthSuccess() {
-				if (authCompleted) return; // Prevent duplicate handling
-
-				authCompleted = true;
-				authData.connecting = false;
-				authData.showCancelOption = false;
-
-				// Clean up timers
-				clearInterval(pollInterval);
-				if (popupTimer) clearTimeout(popupTimer);
-				if (cancelTimeout) clearTimeout(cancelTimeout);
-
-				// Update auth state
-				setTimeout(checkGoogleAuth, 100);
-			}
-
-			// Clean up function to handle all cleanup in one place
-			const cleanUp = () => {
-				clearInterval(pollInterval);
-				if (popupTimer) clearTimeout(popupTimer);
-				if (cancelTimeout) clearTimeout(cancelTimeout);
-				authData.connecting = false;
-			};
-
-			// Set a timeout for initial auth check
-			popupTimer = setTimeout(() => {
-				// Only check if auth isn't already completed
-				if (!authCompleted) {
-					cleanUp();
-					// Check if tokens were stored by the popup before it was closed
-					setTimeout(checkGoogleAuth, 100);
-				}
-			}, 30 * 1000) as unknown as number; // Reduced from 60s to 30s
-
-			// Show cancel option sooner
-			cancelTimeout = setTimeout(() => {
-				if (!authCompleted) {
-					authData.showCancelOption = true;
-				}
-			}, 10 * 1000) as unknown as number; // Reduced from 20s to 10s
-
-			// Final cleanup timeout
-			setTimeout(() => {
-				if (!authCompleted) {
-					cleanUp();
-				}
-			}, 60 * 1000); // Reduced from 3min to 1min
-		} catch (error) {
-			console.error('Error connecting to Google:', error);
-			authData.error = 'Failed to connect to Google';
-			authData.connecting = false;
-		}
-	}
-
-	function cancelGoogleAuth() {
-		authData.connecting = false;
-		authData.showCancelOption = false;
-	}
-
-	async function fetchUserInfo(accessToken: string) {
-		try {
-			// Use the new getUserInfo function from our lib
-			const userData = await getUserInfo(accessToken);
-			if (userData) {
-				authData.userEmail = userData.email;
-			} else {
-				authData.userEmail = null;
-			}
-		} catch (error) {
-			console.error('Error fetching user info:', error);
-			authData.userEmail = null;
-		}
-	}
-
-	async function disconnectGoogle() {
-		try {
-			// First revoke the token at Google using our API
-			const accessToken = localStorage.getItem('google_access_token');
-			if (accessToken) {
-				await revokeToken(accessToken);
-			}
-
-			// Remove tokens from local storage
-			localStorage.removeItem('google_access_token');
-			localStorage.removeItem('google_refresh_token');
-
-			// Update auth state
-			authData.isConnected = false;
-			authData.token = null;
-			authData.userEmail = null;
-
-			// Clear any selected sheets data
-			sheetsData.availableSheets = [];
-			sheetsData.selectedSheet = null;
-			sheetsData.sheetData = [];
-		} catch (error) {
-			console.error('Error disconnecting from Google:', error);
-			authData.error = 'Failed to disconnect from Google';
-		}
-	}
-
 	// Step navigation
 	function nextStep() {
 		if (validateCurrentStep()) {
@@ -265,7 +78,7 @@
 		let isValid = true;
 
 		if (currentStep === 0) {
-			if (!authData.isConnected) {
+			if (!isGoogleConnected) {
 				toast.error('Please connect your Google account to continue');
 				errors.auth = 'Please connect your Google account to continue';
 				return false;
@@ -359,8 +172,8 @@
 		}
 
 		try {
-			// Use the new unified API endpoint
+			// Use the new unified API endpoint, requesting only a preview range
-			const response = await fetch(`/private/api/google/sheets/${sheet.id}/data`, {
+			const response = await fetch(`/private/api/google/sheets/${sheet.id}/data?range=A1:Z10`, {
 				method: 'GET',
 				headers: {
 					Authorization: `Bearer ${localStorage.getItem('google_refresh_token')}`
@@ -437,13 +250,13 @@
 
 	// Computed values
 	let canProceed = $derived(() => {
-		if (currentStep === 0) return authData.isConnected;
+		if (currentStep === 0) return isGoogleConnected;
-		if (currentStep === 1) return eventData.name && eventData.date;
+		if (currentStep === 1) return !!(eventData.name && eventData.date);
 		if (currentStep === 2) {
 			const { name, surname, email, confirmation } = sheetsData.columnMapping;
-			return sheetsData.selectedSheet && name && surname && email && confirmation;
+			return !!(sheetsData.selectedSheet && name && surname && email && confirmation);
 		}
-		if (currentStep === 3) return emailData.subject && emailData.body;
+		if (currentStep === 3) return !!(emailData.subject && emailData.body);
 		return false;
 	});
 </script>
@@ -455,16 +268,9 @@
 <div class="mb-4 rounded border border-gray-300 bg-white p-6">
 	{#if currentStep === 0}
 		<GoogleAuthStep
-			onSuccess={(token) => {
+			onSuccess={() => (isGoogleConnected = true)}
-				authData.error = null;
+			onDisconnect={() => (isGoogleConnected = false)}
-				authData.token = token;
+			onError={(err) => toast.error(err)}
-				authData.isConnected = true;
-				setTimeout(checkGoogleAuth, 100);
-			}}
-			onError={(error) => {
-				authData.error = error;
-				authData.isConnected = false;
-			}}
 		/>
 	{:else if currentStep === 1}
 		<EventDetailsStep bind:eventData />
@@ -485,7 +291,7 @@
 <StepNavigation
 	{currentStep}
 	{totalSteps}
-	{canProceed}
+	canProceed={canProceed()}
 	{loading}
 	{prevStep}
 	{nextStep}

src/routes/private/events/event/new/components/GoogleAuthStep.svelte

@@ -2,9 +2,10 @@
 	import GoogleAuthButton from '$lib/components/GoogleAuthButton.svelte';
 
 	// Props
-	let { onSuccess, onError } = $props<{
+	let { onSuccess, onError, onDisconnect } = $props<{
 		onSuccess?: (token: string) => void;
 		onError?: (error: string) => void;
+		onDisconnect?: () => void;
 	}>();
 </script>
 
@@ -15,11 +16,12 @@
 			To create events and import participants from Google Sheets, you need to connect your Google account.
 		</p>
 
-		<GoogleAuthButton 
+		<GoogleAuthButton
-				size="large"
+			size="large"
-				variant="primary"
+			variant="primary"
-				onSuccess={onSuccess}
+			{onSuccess}
-				onError={onError}
+			{onError}
-			/>
+			{onDisconnect}
+		/>
 	</div>
 </div>

src/routes/private/events/event/view/+page.svelte

@@ -115,6 +115,8 @@
 		}
 
 		syncingParticipants = true;
+		const previousCount = participants.length; // Capture count before sync
+
 		try {
 			// Fetch sheet data
 			const response = await fetch(`/private/api/google/sheets/${event.sheet_id}/data`, {
@@ -177,16 +179,23 @@
 
 			// Reload participants
 			await loadParticipants();
-			
+
-			// Show success message with count of synced participants
+			// Show success message with accurate count of changes
-			const previousCount = participants.length;
+			const newCount = participants.length;
-			const newCount = names.length;
+			const diff = newCount - previousCount;
-			const addedCount = Math.max(0, participants.length - previousCount);
+			const processedCount = names.length;
-			
+
-			toast.success(
+			let message = `Sync complete. ${processedCount} confirmed entries processed from the sheet.`;
-				`Successfully synced participants. ${newCount} entries processed, ${addedCount} new participants added.`,
+
-				5000
+			if (diff > 0) {
-			);
+				message += ` ${diff} new participants added.`;
+			} else if (diff < 0) {
+				message += ` ${-diff} participants removed.`;
+			} else {
+				message += ` No changes to the participant list.`;
+			}
+
+			toast.success(message, 6000);
 		} catch (err) {
 			console.error('Error syncing participants:', err);
 			toast.error(`Failed to sync participants: ${err instanceof Error ? err.message : 'Unknown error'}`);