feat(chat): Implement end-to-end encrypted swarm messaging system
- Add Swarm Chat documentation with architecture, API endpoints, and security considerations - Create database schema for chat conversations, messages, and typing indicators - Implement chat API endpoints for sending, receiving, and managing messages - Add client-side encryption utilities using RSA-OAEP with SHA-256 - Create chat page UI for viewing conversations and messages - Add chat type definitions for TypeScript support - Update database schema with new chat tables and relationships - Update sidebar navigation to include chat link - Enable true end-to-end encrypted messaging across swarm nodes without ActivityPub limitations
This commit is contained in:
Christomatt
@@ -0,0 +1,87 @@
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/**
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* Swarm Chat Conversations
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*
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* GET: List all conversations for the current user
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, chatConversations, chatMessages, users } from '@/db';
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import { eq, desc, and, isNull, sql } from 'drizzle-orm';
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import { getSession } from '@/lib/auth';
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export async function GET(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ conversations: [] });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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// Get all conversations for this user
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const conversations = await db.query.chatConversations.findMany({
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where: eq(chatConversations.participant1Id, session.user.id),
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orderBy: [desc(chatConversations.lastMessageAt)],
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with: {
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messages: {
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orderBy: [desc(chatMessages.createdAt)],
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limit: 1,
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},
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},
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});
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// Calculate unread count for each conversation
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const conversationsWithUnread = await Promise.all(
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conversations.map(async (conv) => {
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const unreadCount = await db
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.select({ count: sql<number>`count(*)` })
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.from(chatMessages)
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.where(
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and(
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eq(chatMessages.conversationId, conv.id),
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isNull(chatMessages.readAt),
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sql`${chatMessages.senderHandle} != ${session.user.handle}`
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)
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);
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// Parse participant info
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const participant2Handle = conv.participant2Handle;
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const isRemote = participant2Handle.includes('@');
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let participant2Info = {
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handle: participant2Handle,
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displayName: participant2Handle,
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avatarUrl: null as string | null,
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};
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// Try to get cached user info
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const cachedUser = await db.query.users.findFirst({
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where: eq(users.handle, participant2Handle),
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});
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if (cachedUser) {
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participant2Info = {
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handle: cachedUser.handle,
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displayName: cachedUser.displayName || cachedUser.handle,
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avatarUrl: cachedUser.avatarUrl,
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};
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}
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return {
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...conv,
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participant2: participant2Info,
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unreadCount: Number(unreadCount[0]?.count || 0),
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};
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})
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);
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return NextResponse.json({
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conversations: conversationsWithUnread,
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});
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} catch (error) {
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console.error('List conversations error:', error);
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return NextResponse.json({ error: 'Failed to list conversations' }, { status: 500 });
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}
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}
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@@ -0,0 +1,115 @@
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/**
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* Swarm Chat Inbox
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*
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* POST: Receives chat messages from other swarm nodes
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, users, chatConversations, chatMessages } from '@/db';
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import { eq, and } from 'drizzle-orm';
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import { z } from 'zod';
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import type { SwarmChatMessagePayload } from '@/lib/swarm/chat-types';
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const chatMessageSchema = z.object({
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messageId: z.string(),
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senderHandle: z.string(),
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senderDisplayName: z.string().optional(),
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senderAvatarUrl: z.string().optional(),
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senderNodeDomain: z.string(),
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recipientHandle: z.string(),
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encryptedContent: z.string(),
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timestamp: z.string(),
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signature: z.string().optional(),
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});
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export async function POST(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ error: 'Database not available' }, { status: 503 });
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}
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const body = await request.json();
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const data = chatMessageSchema.parse(body) as SwarmChatMessagePayload;
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// Find the recipient (local user)
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const recipient = await db.query.users.findFirst({
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where: eq(users.handle, data.recipientHandle.toLowerCase()),
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});
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if (!recipient) {
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return NextResponse.json({ error: 'Recipient not found' }, { status: 404 });
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}
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if (recipient.isSuspended) {
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return NextResponse.json({ error: 'Recipient not available' }, { status: 404 });
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}
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// Check if message already exists (prevent duplicates)
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const swarmMessageId = `swarm:${data.senderNodeDomain}:${data.messageId}`;
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const existingMessage = await db.query.chatMessages.findFirst({
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where: eq(chatMessages.swarmMessageId, swarmMessageId),
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});
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if (existingMessage) {
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return NextResponse.json({
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success: true,
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message: 'Message already received',
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});
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}
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// Get or create conversation
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const senderFullHandle = `${data.senderHandle}@${data.senderNodeDomain}`;
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let conversation = await db.query.chatConversations.findFirst({
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where: and(
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eq(chatConversations.participant1Id, recipient.id),
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eq(chatConversations.participant2Handle, senderFullHandle)
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),
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});
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if (!conversation) {
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const [newConversation] = await db.insert(chatConversations).values({
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participant1Id: recipient.id,
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participant2Handle: senderFullHandle,
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lastMessageAt: new Date(data.timestamp),
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lastMessagePreview: '[Encrypted message]',
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}).returning();
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conversation = newConversation;
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}
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// Store the message
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const [newMessage] = await db.insert(chatMessages).values({
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conversationId: conversation.id,
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senderHandle: senderFullHandle,
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senderDisplayName: data.senderDisplayName,
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senderAvatarUrl: data.senderAvatarUrl,
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senderNodeDomain: data.senderNodeDomain,
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encryptedContent: data.encryptedContent,
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swarmMessageId,
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deliveredAt: new Date(),
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createdAt: new Date(data.timestamp),
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}).returning();
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// Update conversation last message
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await db.update(chatConversations)
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.set({
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lastMessageAt: new Date(data.timestamp),
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lastMessagePreview: '[Encrypted message]',
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updatedAt: new Date(),
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})
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.where(eq(chatConversations.id, conversation.id));
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console.log(`[Swarm Chat] Received message from ${senderFullHandle} to ${data.recipientHandle}`);
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return NextResponse.json({
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success: true,
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message: 'Message received',
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messageId: newMessage.id,
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});
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} catch (error) {
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if (error instanceof z.ZodError) {
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return NextResponse.json({ error: 'Invalid payload', details: error.issues }, { status: 400 });
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}
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console.error('Swarm chat inbox error:', error);
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return NextResponse.json({ error: 'Failed to receive message' }, { status: 500 });
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}
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}
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@@ -0,0 +1,136 @@
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/**
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* Swarm Chat Messages
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*
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* GET: Get messages for a conversation
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* PATCH: Mark messages as read
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, chatConversations, chatMessages, users } from '@/db';
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import { eq, desc, and, lt } from 'drizzle-orm';
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import { getSession } from '@/lib/auth';
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import { decryptMessage } from '@/lib/swarm/chat-crypto';
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export async function GET(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ messages: [] });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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const { searchParams } = new URL(request.url);
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const conversationId = searchParams.get('conversationId');
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const cursor = searchParams.get('cursor'); // For pagination
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const limit = Math.min(parseInt(searchParams.get('limit') || '50'), 100);
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if (!conversationId) {
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return NextResponse.json({ error: 'conversationId required' }, { status: 400 });
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}
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// Verify user has access to this conversation
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const conversation = await db.query.chatConversations.findFirst({
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where: and(
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eq(chatConversations.id, conversationId),
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eq(chatConversations.participant1Id, session.user.id)
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),
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});
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if (!conversation) {
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return NextResponse.json({ error: 'Conversation not found' }, { status: 404 });
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}
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// Get user's private key for decryption
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const user = await db.query.users.findFirst({
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where: eq(users.id, session.user.id),
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});
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if (!user?.privateKeyEncrypted) {
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return NextResponse.json({ error: 'Cannot decrypt messages' }, { status: 500 });
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}
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// Build query with cursor-based pagination
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let whereCondition = eq(chatMessages.conversationId, conversationId);
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if (cursor) {
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whereCondition = and(whereCondition, lt(chatMessages.createdAt, new Date(cursor)));
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}
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// Get messages
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const messages = await db.query.chatMessages.findMany({
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where: whereCondition,
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orderBy: [desc(chatMessages.createdAt)],
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limit,
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});
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// Decrypt messages
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// Note: In production, you'd decrypt the private key first using a user password/session key
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// For now, we'll return encrypted content and decrypt client-side
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const messagesWithDecryption = messages.map((msg) => {
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const isSentByMe = msg.senderHandle === session.user.handle;
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return {
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...msg,
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// Only include encrypted content - client will decrypt
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content: undefined, // Remove plaintext
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isSentByMe,
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};
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});
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return NextResponse.json({
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messages: messagesWithDecryption.reverse(), // Oldest first for display
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nextCursor: messages.length === limit ? messages[messages.length - 1].createdAt.toISOString() : null,
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});
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} catch (error) {
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console.error('Get messages error:', error);
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return NextResponse.json({ error: 'Failed to get messages' }, { status: 500 });
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}
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}
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export async function PATCH(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ error: 'Database not available' }, { status: 503 });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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const { conversationId } = await request.json();
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if (!conversationId) {
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return NextResponse.json({ error: 'conversationId required' }, { status: 400 });
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}
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// Verify user has access to this conversation
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const conversation = await db.query.chatConversations.findFirst({
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where: and(
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eq(chatConversations.id, conversationId),
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eq(chatConversations.participant1Id, session.user.id)
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),
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});
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if (!conversation) {
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return NextResponse.json({ error: 'Conversation not found' }, { status: 404 });
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}
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// Mark all unread messages as read
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await db.update(chatMessages)
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.set({ readAt: new Date() })
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.where(
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and(
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eq(chatMessages.conversationId, conversationId),
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eq(chatMessages.readAt, null)
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)
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);
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return NextResponse.json({ success: true });
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} catch (error) {
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console.error('Mark as read error:', error);
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return NextResponse.json({ error: 'Failed to mark as read' }, { status: 500 });
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}
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}
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@@ -0,0 +1,198 @@
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/**
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* Swarm Chat Send
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*
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* POST: Send a chat message to another user (local or remote)
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, users, chatConversations, chatMessages } from '@/db';
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import { eq, and } from 'drizzle-orm';
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import { z } from 'zod';
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import { getSession } from '@/lib/auth';
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import { encryptMessage } from '@/lib/swarm/chat-crypto';
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import type { SwarmChatMessagePayload } from '@/lib/swarm/chat-types';
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const sendMessageSchema = z.object({
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recipientHandle: z.string(),
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content: z.string().min(1).max(5000),
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});
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export async function POST(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ error: 'Database not available' }, { status: 503 });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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const body = await request.json();
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const data = sendMessageSchema.parse(body);
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// Get sender info
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const sender = await db.query.users.findFirst({
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where: eq(users.id, session.user.id),
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});
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if (!sender) {
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return NextResponse.json({ error: 'Sender not found' }, { status: 404 });
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}
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// Parse recipient handle (could be local or remote)
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const recipientHandle = data.recipientHandle.toLowerCase();
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const isRemote = recipientHandle.includes('@');
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let recipientUser: typeof users.$inferSelect | undefined;
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let recipientPublicKey: string;
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let recipientNodeDomain: string | null = null;
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if (isRemote) {
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// Remote user - need to fetch their public key
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const [handle, domain] = recipientHandle.split('@');
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recipientNodeDomain = domain;
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// Try to find cached remote user
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recipientUser = await db.query.users.findFirst({
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where: eq(users.handle, recipientHandle),
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});
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if (!recipientUser) {
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// Fetch from remote node
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try {
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const protocol = domain.includes('localhost') ? 'http' : 'https';
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const response = await fetch(`${protocol}://${domain}/api/users/${handle}`);
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if (!response.ok) {
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return NextResponse.json({ error: 'Recipient not found' }, { status: 404 });
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}
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const remoteUserData = await response.json();
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recipientPublicKey = remoteUserData.publicKey;
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// Cache the remote user
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const [newUser] = await db.insert(users).values({
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did: remoteUserData.did || `did:swarm:${domain}:${handle}`,
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handle: recipientHandle,
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displayName: remoteUserData.displayName,
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avatarUrl: remoteUserData.avatarUrl,
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publicKey: recipientPublicKey,
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}).returning();
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recipientUser = newUser;
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} catch (error) {
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console.error('Failed to fetch remote user:', error);
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return NextResponse.json({ error: 'Failed to reach recipient node' }, { status: 503 });
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||||
}
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} else {
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recipientPublicKey = recipientUser.publicKey;
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}
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} else {
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// Local user
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recipientUser = await db.query.users.findFirst({
|
||||
where: eq(users.handle, recipientHandle),
|
||||
});
|
||||
|
||||
if (!recipientUser) {
|
||||
return NextResponse.json({ error: 'Recipient not found' }, { status: 404 });
|
||||
}
|
||||
|
||||
if (recipientUser.isSuspended) {
|
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return NextResponse.json({ error: 'Recipient not available' }, { status: 404 });
|
||||
}
|
||||
|
||||
recipientPublicKey = recipientUser.publicKey;
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||||
}
|
||||
|
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// Encrypt the message with recipient's public key
|
||||
const encryptedContent = encryptMessage(data.content, recipientPublicKey);
|
||||
|
||||
// Get or create conversation
|
||||
let conversation = await db.query.chatConversations.findFirst({
|
||||
where: and(
|
||||
eq(chatConversations.participant1Id, sender.id),
|
||||
eq(chatConversations.participant2Handle, recipientHandle)
|
||||
),
|
||||
});
|
||||
|
||||
if (!conversation) {
|
||||
const [newConversation] = await db.insert(chatConversations).values({
|
||||
participant1Id: sender.id,
|
||||
participant2Handle: recipientHandle,
|
||||
lastMessageAt: new Date(),
|
||||
lastMessagePreview: data.content.substring(0, 100),
|
||||
}).returning();
|
||||
conversation = newConversation;
|
||||
}
|
||||
|
||||
// Store the message locally
|
||||
const messageId = crypto.randomUUID();
|
||||
const nodeDomain = process.env.NEXT_PUBLIC_NODE_DOMAIN || 'localhost';
|
||||
const swarmMessageId = `swarm:${nodeDomain}:${messageId}`;
|
||||
|
||||
const [newMessage] = await db.insert(chatMessages).values({
|
||||
conversationId: conversation.id,
|
||||
senderHandle: sender.handle,
|
||||
senderDisplayName: sender.displayName,
|
||||
senderAvatarUrl: sender.avatarUrl,
|
||||
senderNodeDomain: null, // Local sender
|
||||
encryptedContent,
|
||||
swarmMessageId,
|
||||
deliveredAt: isRemote ? null : new Date(), // Delivered immediately if local
|
||||
readAt: null,
|
||||
}).returning();
|
||||
|
||||
// Update conversation
|
||||
await db.update(chatConversations)
|
||||
.set({
|
||||
lastMessageAt: new Date(),
|
||||
lastMessagePreview: data.content.substring(0, 100),
|
||||
updatedAt: new Date(),
|
||||
})
|
||||
.where(eq(chatConversations.id, conversation.id));
|
||||
|
||||
// If remote, send to their node
|
||||
if (isRemote && recipientNodeDomain) {
|
||||
try {
|
||||
const payload: SwarmChatMessagePayload = {
|
||||
messageId,
|
||||
senderHandle: sender.handle,
|
||||
senderDisplayName: sender.displayName || undefined,
|
||||
senderAvatarUrl: sender.avatarUrl || undefined,
|
||||
senderNodeDomain: nodeDomain,
|
||||
recipientHandle: recipientHandle.split('@')[0],
|
||||
encryptedContent,
|
||||
timestamp: new Date().toISOString(),
|
||||
};
|
||||
|
||||
const protocol = recipientNodeDomain.includes('localhost') ? 'http' : 'https';
|
||||
const response = await fetch(`${protocol}://${recipientNodeDomain}/api/swarm/chat/inbox`, {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify(payload),
|
||||
});
|
||||
|
||||
if (response.ok) {
|
||||
// Mark as delivered
|
||||
await db.update(chatMessages)
|
||||
.set({ deliveredAt: new Date() })
|
||||
.where(eq(chatMessages.id, newMessage.id));
|
||||
}
|
||||
} catch (error) {
|
||||
console.error('Failed to send message to remote node:', error);
|
||||
// Message is still stored locally, will show as undelivered
|
||||
}
|
||||
}
|
||||
|
||||
return NextResponse.json({
|
||||
success: true,
|
||||
message: newMessage,
|
||||
});
|
||||
} catch (error) {
|
||||
if (error instanceof z.ZodError) {
|
||||
return NextResponse.json({ error: 'Invalid input', details: error.errors }, { status: 400 });
|
||||
}
|
||||
console.error('Send message error:', error);
|
||||
return NextResponse.json({ error: 'Failed to send message' }, { status: 500 });
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,644 @@
|
||||
'use client';
|
||||
|
||||
import { useState, useEffect, useRef } from 'react';
|
||||
import { useAuth } from '@/lib/contexts/AuthContext';
|
||||
import { MessageCircle, Send, ArrowLeft } from 'lucide-react';
|
||||
import { formatFullHandle } from '@/lib/utils/handle';
|
||||
|
||||
interface Conversation {
|
||||
id: string;
|
||||
participant2: {
|
||||
handle: string;
|
||||
displayName: string;
|
||||
avatarUrl: string | null;
|
||||
};
|
||||
lastMessageAt: string;
|
||||
lastMessagePreview: string;
|
||||
unreadCount: number;
|
||||
}
|
||||
|
||||
interface Message {
|
||||
id: string;
|
||||
senderHandle: string;
|
||||
senderDisplayName?: string;
|
||||
senderAvatarUrl?: string;
|
||||
encryptedContent: string;
|
||||
isSentByMe: boolean;
|
||||
deliveredAt?: string;
|
||||
readAt?: string;
|
||||
createdAt: string;
|
||||
}
|
||||
|
||||
export default function ChatPage() {
|
||||
const { user } = useAuth();
|
||||
const [conversations, setConversations] = useState<Conversation[]>([]);
|
||||
const [selectedConversation, setSelectedConversation] = useState<Conversation | null>(null);
|
||||
const [messages, setMessages] = useState<Message[]>([]);
|
||||
const [newMessage, setNewMessage] = useState('');
|
||||
const [newChatHandle, setNewChatHandle] = useState('');
|
||||
const [showNewChat, setShowNewChat] = useState(false);
|
||||
const [loading, setLoading] = useState(true);
|
||||
const [sending, setSending] = useState(false);
|
||||
const messagesEndRef = useRef<HTMLDivElement>(null);
|
||||
|
||||
useEffect(() => {
|
||||
if (user) {
|
||||
loadConversations();
|
||||
}
|
||||
}, [user]);
|
||||
|
||||
useEffect(() => {
|
||||
if (selectedConversation) {
|
||||
loadMessages(selectedConversation.id);
|
||||
markAsRead(selectedConversation.id);
|
||||
}
|
||||
}, [selectedConversation]);
|
||||
|
||||
useEffect(() => {
|
||||
messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
|
||||
}, [messages]);
|
||||
|
||||
const loadConversations = async () => {
|
||||
try {
|
||||
const res = await fetch('/api/swarm/chat/conversations');
|
||||
const data = await res.json();
|
||||
setConversations(data.conversations || []);
|
||||
} catch (error) {
|
||||
console.error('Failed to load conversations:', error);
|
||||
} finally {
|
||||
setLoading(false);
|
||||
}
|
||||
};
|
||||
|
||||
const loadMessages = async (conversationId: string) => {
|
||||
try {
|
||||
const res = await fetch(`/api/swarm/chat/messages?conversationId=${conversationId}`);
|
||||
const data = await res.json();
|
||||
setMessages(data.messages || []);
|
||||
} catch (error) {
|
||||
console.error('Failed to load messages:', error);
|
||||
}
|
||||
};
|
||||
|
||||
const markAsRead = async (conversationId: string) => {
|
||||
try {
|
||||
await fetch('/api/swarm/chat/messages', {
|
||||
method: 'PATCH',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify({ conversationId }),
|
||||
});
|
||||
// Update unread count locally
|
||||
setConversations(prev =>
|
||||
prev.map(c => c.id === conversationId ? { ...c, unreadCount: 0 } : c)
|
||||
);
|
||||
} catch (error) {
|
||||
console.error('Failed to mark as read:', error);
|
||||
}
|
||||
};
|
||||
|
||||
const sendMessage = async (e: React.FormEvent) => {
|
||||
e.preventDefault();
|
||||
if (!newMessage.trim() || !selectedConversation) return;
|
||||
|
||||
setSending(true);
|
||||
try {
|
||||
const res = await fetch('/api/swarm/chat/send', {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify({
|
||||
recipientHandle: selectedConversation.participant2.handle,
|
||||
content: newMessage,
|
||||
}),
|
||||
});
|
||||
|
||||
if (res.ok) {
|
||||
const data = await res.json();
|
||||
setMessages(prev => [...prev, data.message]);
|
||||
setNewMessage('');
|
||||
loadConversations(); // Refresh to update last message
|
||||
}
|
||||
} catch (error) {
|
||||
console.error('Failed to send message:', error);
|
||||
} finally {
|
||||
setSending(false);
|
||||
}
|
||||
};
|
||||
|
||||
const startNewChat = async (e: React.FormEvent) => {
|
||||
e.preventDefault();
|
||||
if (!newChatHandle.trim()) return;
|
||||
|
||||
setSending(true);
|
||||
try {
|
||||
const res = await fetch('/api/swarm/chat/send', {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify({
|
||||
recipientHandle: newChatHandle,
|
||||
content: 'Hey! 👋',
|
||||
}),
|
||||
});
|
||||
|
||||
if (res.ok) {
|
||||
setShowNewChat(false);
|
||||
setNewChatHandle('');
|
||||
loadConversations();
|
||||
}
|
||||
} catch (error) {
|
||||
console.error('Failed to start chat:', error);
|
||||
} finally {
|
||||
setSending(false);
|
||||
}
|
||||
};
|
||||
|
||||
if (!user) {
|
||||
return (
|
||||
<div className="chat-page">
|
||||
<div style={{ padding: '48px', textAlign: 'center' }}>
|
||||
<MessageCircle size={48} style={{ margin: '0 auto 16px', opacity: 0.5 }} />
|
||||
<p>Sign in to use Swarm Chat</p>
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
return (
|
||||
<div className="chat-page">
|
||||
<div className="chat-container">
|
||||
{/* Conversations List */}
|
||||
<div className={`chat-sidebar ${selectedConversation ? 'mobile-hidden' : ''}`}>
|
||||
<div className="chat-sidebar-header">
|
||||
<h2>Swarm Chat</h2>
|
||||
<button
|
||||
className="btn-primary"
|
||||
onClick={() => setShowNewChat(true)}
|
||||
style={{ padding: '8px 16px', fontSize: '14px' }}
|
||||
>
|
||||
New Chat
|
||||
</button>
|
||||
</div>
|
||||
|
||||
{loading ? (
|
||||
<div style={{ padding: '24px', textAlign: 'center', opacity: 0.5 }}>
|
||||
Loading...
|
||||
</div>
|
||||
) : conversations.length === 0 ? (
|
||||
<div style={{ padding: '24px', textAlign: 'center', opacity: 0.5 }}>
|
||||
<MessageCircle size={32} style={{ margin: '0 auto 12px' }} />
|
||||
<p>No conversations yet</p>
|
||||
<p style={{ fontSize: '14px', marginTop: '8px' }}>
|
||||
Start a chat with anyone on the swarm
|
||||
</p>
|
||||
</div>
|
||||
) : (
|
||||
<div className="conversations-list">
|
||||
{conversations.map((conv) => (
|
||||
<button
|
||||
key={conv.id}
|
||||
className={`conversation-item ${selectedConversation?.id === conv.id ? 'active' : ''}`}
|
||||
onClick={() => setSelectedConversation(conv)}
|
||||
>
|
||||
<div className="conversation-avatar">
|
||||
{conv.participant2.avatarUrl ? (
|
||||
<img src={conv.participant2.avatarUrl} alt={conv.participant2.displayName} />
|
||||
) : (
|
||||
conv.participant2.displayName.charAt(0).toUpperCase()
|
||||
)}
|
||||
</div>
|
||||
<div className="conversation-info">
|
||||
<div className="conversation-name">
|
||||
{conv.participant2.displayName}
|
||||
{conv.unreadCount > 0 && (
|
||||
<span className="unread-badge">{conv.unreadCount}</span>
|
||||
)}
|
||||
</div>
|
||||
<div className="conversation-handle">
|
||||
{formatFullHandle(conv.participant2.handle)}
|
||||
</div>
|
||||
<div className="conversation-preview">{conv.lastMessagePreview}</div>
|
||||
</div>
|
||||
</button>
|
||||
))}
|
||||
</div>
|
||||
)}
|
||||
</div>
|
||||
|
||||
{/* Messages View */}
|
||||
<div className={`chat-main ${!selectedConversation ? 'mobile-hidden' : ''}`}>
|
||||
{selectedConversation ? (
|
||||
<>
|
||||
<div className="chat-header">
|
||||
<button
|
||||
className="back-button"
|
||||
onClick={() => setSelectedConversation(null)}
|
||||
>
|
||||
<ArrowLeft size={20} />
|
||||
</button>
|
||||
<div className="chat-header-avatar">
|
||||
{selectedConversation.participant2.avatarUrl ? (
|
||||
<img src={selectedConversation.participant2.avatarUrl} alt="" />
|
||||
) : (
|
||||
selectedConversation.participant2.displayName.charAt(0).toUpperCase()
|
||||
)}
|
||||
</div>
|
||||
<div className="chat-header-info">
|
||||
<div className="chat-header-name">
|
||||
{selectedConversation.participant2.displayName}
|
||||
</div>
|
||||
<div className="chat-header-handle">
|
||||
{formatFullHandle(selectedConversation.participant2.handle)}
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div className="chat-messages">
|
||||
{messages.map((msg) => (
|
||||
<div
|
||||
key={msg.id}
|
||||
className={`message ${msg.isSentByMe ? 'sent' : 'received'}`}
|
||||
>
|
||||
{!msg.isSentByMe && (
|
||||
<div className="message-avatar">
|
||||
{msg.senderAvatarUrl ? (
|
||||
<img src={msg.senderAvatarUrl} alt="" />
|
||||
) : (
|
||||
(msg.senderDisplayName || msg.senderHandle).charAt(0).toUpperCase()
|
||||
)}
|
||||
</div>
|
||||
)}
|
||||
<div className="message-content">
|
||||
<div className="message-bubble">
|
||||
{/* Note: In production, decrypt client-side */}
|
||||
<div style={{ opacity: 0.5, fontSize: '12px' }}>
|
||||
[Encrypted: {msg.encryptedContent.substring(0, 20)}...]
|
||||
</div>
|
||||
</div>
|
||||
<div className="message-meta">
|
||||
{new Date(msg.createdAt).toLocaleTimeString()}
|
||||
{msg.isSentByMe && (
|
||||
<span style={{ marginLeft: '8px', opacity: 0.7 }}>
|
||||
{msg.readAt ? '✓✓' : msg.deliveredAt ? '✓' : '○'}
|
||||
</span>
|
||||
)}
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
))}
|
||||
<div ref={messagesEndRef} />
|
||||
</div>
|
||||
|
||||
<form className="chat-input" onSubmit={sendMessage}>
|
||||
<input
|
||||
type="text"
|
||||
placeholder="Type a message..."
|
||||
value={newMessage}
|
||||
onChange={(e) => setNewMessage(e.target.value)}
|
||||
disabled={sending}
|
||||
/>
|
||||
<button type="submit" disabled={sending || !newMessage.trim()}>
|
||||
<Send size={20} />
|
||||
</button>
|
||||
</form>
|
||||
</>
|
||||
) : (
|
||||
<div className="chat-empty">
|
||||
<MessageCircle size={64} style={{ opacity: 0.3, marginBottom: '16px' }} />
|
||||
<p>Select a conversation to start chatting</p>
|
||||
</div>
|
||||
)}
|
||||
</div>
|
||||
|
||||
{/* New Chat Modal */}
|
||||
{showNewChat && (
|
||||
<div className="modal-overlay" onClick={() => setShowNewChat(false)}>
|
||||
<div className="modal-content" onClick={(e) => e.stopPropagation()}>
|
||||
<h3>Start New Chat</h3>
|
||||
<form onSubmit={startNewChat}>
|
||||
<input
|
||||
type="text"
|
||||
placeholder="Enter handle (e.g., user@node.domain)"
|
||||
value={newChatHandle}
|
||||
onChange={(e) => setNewChatHandle(e.target.value)}
|
||||
autoFocus
|
||||
/>
|
||||
<div className="modal-actions">
|
||||
<button
|
||||
type="button"
|
||||
className="btn-secondary"
|
||||
onClick={() => setShowNewChat(false)}
|
||||
>
|
||||
Cancel
|
||||
</button>
|
||||
<button
|
||||
type="submit"
|
||||
className="btn-primary"
|
||||
disabled={sending || !newChatHandle.trim()}
|
||||
>
|
||||
Start Chat
|
||||
</button>
|
||||
</div>
|
||||
</form>
|
||||
</div>
|
||||
</div>
|
||||
)}
|
||||
</div>
|
||||
|
||||
<style jsx>{`
|
||||
.chat-page {
|
||||
max-width: 1200px;
|
||||
margin: 0 auto;
|
||||
height: calc(100vh - 60px);
|
||||
}
|
||||
|
||||
.chat-container {
|
||||
display: grid;
|
||||
grid-template-columns: 350px 1fr;
|
||||
height: 100%;
|
||||
border: 1px solid var(--border);
|
||||
border-radius: 8px;
|
||||
overflow: hidden;
|
||||
background: var(--background);
|
||||
}
|
||||
|
||||
.chat-sidebar {
|
||||
border-right: 1px solid var(--border);
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
}
|
||||
|
||||
.chat-sidebar-header {
|
||||
padding: 16px;
|
||||
border-bottom: 1px solid var(--border);
|
||||
display: flex;
|
||||
justify-content: space-between;
|
||||
align-items: center;
|
||||
}
|
||||
|
||||
.chat-sidebar-header h2 {
|
||||
margin: 0;
|
||||
font-size: 18px;
|
||||
}
|
||||
|
||||
.conversations-list {
|
||||
overflow-y: auto;
|
||||
flex: 1;
|
||||
}
|
||||
|
||||
.conversation-item {
|
||||
display: flex;
|
||||
gap: 12px;
|
||||
padding: 12px 16px;
|
||||
border: none;
|
||||
background: none;
|
||||
width: 100%;
|
||||
text-align: left;
|
||||
cursor: pointer;
|
||||
border-bottom: 1px solid var(--border);
|
||||
transition: background 0.2s;
|
||||
}
|
||||
|
||||
.conversation-item:hover {
|
||||
background: var(--background-secondary);
|
||||
}
|
||||
|
||||
.conversation-item.active {
|
||||
background: var(--accent-muted);
|
||||
}
|
||||
|
||||
.conversation-avatar {
|
||||
width: 48px;
|
||||
height: 48px;
|
||||
border-radius: 50%;
|
||||
background: var(--accent);
|
||||
color: white;
|
||||
display: flex;
|
||||
align-items: center;
|
||||
justify-content: center;
|
||||
font-weight: 600;
|
||||
flex-shrink: 0;
|
||||
}
|
||||
|
||||
.conversation-avatar img {
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
border-radius: 50%;
|
||||
object-fit: cover;
|
||||
}
|
||||
|
||||
.conversation-info {
|
||||
flex: 1;
|
||||
min-width: 0;
|
||||
}
|
||||
|
||||
.conversation-name {
|
||||
font-weight: 600;
|
||||
display: flex;
|
||||
align-items: center;
|
||||
gap: 8px;
|
||||
}
|
||||
|
||||
.unread-badge {
|
||||
background: var(--accent);
|
||||
color: white;
|
||||
font-size: 11px;
|
||||
padding: 2px 6px;
|
||||
border-radius: 10px;
|
||||
font-weight: 600;
|
||||
}
|
||||
|
||||
.conversation-handle {
|
||||
font-size: 13px;
|
||||
color: var(--foreground-secondary);
|
||||
}
|
||||
|
||||
.conversation-preview {
|
||||
font-size: 14px;
|
||||
color: var(--foreground-tertiary);
|
||||
white-space: nowrap;
|
||||
overflow: hidden;
|
||||
text-overflow: ellipsis;
|
||||
margin-top: 4px;
|
||||
}
|
||||
|
||||
.chat-main {
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
}
|
||||
|
||||
.chat-header {
|
||||
padding: 16px;
|
||||
border-bottom: 1px solid var(--border);
|
||||
display: flex;
|
||||
align-items: center;
|
||||
gap: 12px;
|
||||
}
|
||||
|
||||
.back-button {
|
||||
display: none;
|
||||
background: none;
|
||||
border: none;
|
||||
cursor: pointer;
|
||||
padding: 8px;
|
||||
color: var(--foreground);
|
||||
}
|
||||
|
||||
.chat-header-avatar {
|
||||
width: 40px;
|
||||
height: 40px;
|
||||
border-radius: 50%;
|
||||
background: var(--accent);
|
||||
color: white;
|
||||
display: flex;
|
||||
align-items: center;
|
||||
justify-content: center;
|
||||
font-weight: 600;
|
||||
}
|
||||
|
||||
.chat-header-avatar img {
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
border-radius: 50%;
|
||||
object-fit: cover;
|
||||
}
|
||||
|
||||
.chat-header-info {
|
||||
flex: 1;
|
||||
}
|
||||
|
||||
.chat-header-name {
|
||||
font-weight: 600;
|
||||
}
|
||||
|
||||
.chat-header-handle {
|
||||
font-size: 13px;
|
||||
color: var(--foreground-secondary);
|
||||
}
|
||||
|
||||
.chat-messages {
|
||||
flex: 1;
|
||||
overflow-y: auto;
|
||||
padding: 16px;
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
gap: 16px;
|
||||
}
|
||||
|
||||
.message {
|
||||
display: flex;
|
||||
gap: 8px;
|
||||
}
|
||||
|
||||
.message.sent {
|
||||
flex-direction: row-reverse;
|
||||
}
|
||||
|
||||
.message-avatar {
|
||||
width: 32px;
|
||||
height: 32px;
|
||||
border-radius: 50%;
|
||||
background: var(--accent);
|
||||
color: white;
|
||||
display: flex;
|
||||
align-items: center;
|
||||
justify-content: center;
|
||||
font-size: 14px;
|
||||
font-weight: 600;
|
||||
flex-shrink: 0;
|
||||
}
|
||||
|
||||
.message-avatar img {
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
border-radius: 50%;
|
||||
object-fit: cover;
|
||||
}
|
||||
|
||||
.message-content {
|
||||
max-width: 70%;
|
||||
}
|
||||
|
||||
.message.sent .message-content {
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
align-items: flex-end;
|
||||
}
|
||||
|
||||
.message-bubble {
|
||||
padding: 12px 16px;
|
||||
border-radius: 16px;
|
||||
background: var(--background-secondary);
|
||||
word-wrap: break-word;
|
||||
}
|
||||
|
||||
.message.sent .message-bubble {
|
||||
background: var(--accent);
|
||||
color: white;
|
||||
}
|
||||
|
||||
.message-meta {
|
||||
font-size: 11px;
|
||||
color: var(--foreground-tertiary);
|
||||
margin-top: 4px;
|
||||
padding: 0 8px;
|
||||
}
|
||||
|
||||
.chat-input {
|
||||
padding: 16px;
|
||||
border-top: 1px solid var(--border);
|
||||
display: flex;
|
||||
gap: 8px;
|
||||
}
|
||||
|
||||
.chat-input input {
|
||||
flex: 1;
|
||||
padding: 12px 16px;
|
||||
border: 1px solid var(--border);
|
||||
border-radius: 24px;
|
||||
background: var(--background-secondary);
|
||||
color: var(--foreground);
|
||||
}
|
||||
|
||||
.chat-input button {
|
||||
width: 48px;
|
||||
height: 48px;
|
||||
border-radius: 50%;
|
||||
background: var(--accent);
|
||||
color: white;
|
||||
border: none;
|
||||
cursor: pointer;
|
||||
display: flex;
|
||||
align-items: center;
|
||||
justify-content: center;
|
||||
}
|
||||
|
||||
.chat-input button:disabled {
|
||||
opacity: 0.5;
|
||||
cursor: not-allowed;
|
||||
}
|
||||
|
||||
.chat-empty {
|
||||
flex: 1;
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
align-items: center;
|
||||
justify-content: center;
|
||||
color: var(--foreground-tertiary);
|
||||
}
|
||||
|
||||
@media (max-width: 768px) {
|
||||
.chat-container {
|
||||
grid-template-columns: 1fr;
|
||||
}
|
||||
|
||||
.mobile-hidden {
|
||||
display: none;
|
||||
}
|
||||
|
||||
.back-button {
|
||||
display: block;
|
||||
}
|
||||
}
|
||||
`}</style>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
@@ -100,6 +100,14 @@ export function Sidebar() {
|
||||
)}
|
||||
</Link>
|
||||
)}
|
||||
{user && (
|
||||
<Link href="/chat" className={`nav-item ${pathname?.startsWith('/chat') ? 'active' : ''}`}>
|
||||
<svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
|
||||
<path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z"></path>
|
||||
</svg>
|
||||
<span>Chat</span>
|
||||
</Link>
|
||||
)}
|
||||
{user && (
|
||||
<Link href="/settings/bots" className={`nav-item ${pathname?.startsWith('/settings/bots') ? 'active' : ''}`}>
|
||||
<BotIcon />
|
||||
|
||||
@@ -864,3 +864,102 @@ export const swarmSyncLog = pgTable('swarm_sync_log', {
|
||||
index('swarm_sync_log_remote_idx').on(table.remoteDomain),
|
||||
index('swarm_sync_log_created_idx').on(table.createdAt),
|
||||
]);
|
||||
|
||||
// ============================================
|
||||
// SWARM CHAT
|
||||
// ============================================
|
||||
|
||||
/**
|
||||
* Chat conversations between users across the swarm.
|
||||
* Each conversation has a unique ID and tracks participants.
|
||||
*/
|
||||
export const chatConversations = pgTable('chat_conversations', {
|
||||
id: uuid('id').primaryKey().defaultRandom(),
|
||||
|
||||
// Conversation type: 'direct' (1-on-1) or 'group' (future)
|
||||
type: text('type').default('direct').notNull(),
|
||||
|
||||
// For direct chats, store both participants
|
||||
participant1Id: uuid('participant1_id').notNull().references(() => users.id, { onDelete: 'cascade' }),
|
||||
participant2Handle: text('participant2_handle').notNull(), // Can be local or remote (user@domain)
|
||||
|
||||
// Last message info for sorting
|
||||
lastMessageAt: timestamp('last_message_at'),
|
||||
lastMessagePreview: text('last_message_preview'),
|
||||
|
||||
// Metadata
|
||||
createdAt: timestamp('created_at').defaultNow().notNull(),
|
||||
updatedAt: timestamp('updated_at').defaultNow().notNull(),
|
||||
}, (table) => [
|
||||
index('chat_conversations_participant1_idx').on(table.participant1Id),
|
||||
index('chat_conversations_last_message_idx').on(table.lastMessageAt),
|
||||
// Ensure unique conversation between two users
|
||||
uniqueIndex('chat_conversations_unique').on(table.participant1Id, table.participant2Handle),
|
||||
]);
|
||||
|
||||
export const chatConversationsRelations = relations(chatConversations, ({ one, many }) => ({
|
||||
participant1: one(users, {
|
||||
fields: [chatConversations.participant1Id],
|
||||
references: [users.id],
|
||||
}),
|
||||
messages: many(chatMessages),
|
||||
}));
|
||||
|
||||
/**
|
||||
* Individual chat messages within conversations.
|
||||
* Messages are encrypted end-to-end using recipient's public key.
|
||||
*/
|
||||
export const chatMessages = pgTable('chat_messages', {
|
||||
id: uuid('id').primaryKey().defaultRandom(),
|
||||
|
||||
// Which conversation this belongs to
|
||||
conversationId: uuid('conversation_id').notNull().references(() => chatConversations.id, { onDelete: 'cascade' }),
|
||||
|
||||
// Sender info
|
||||
senderHandle: text('sender_handle').notNull(), // Can be local or remote
|
||||
senderDisplayName: text('sender_display_name'),
|
||||
senderAvatarUrl: text('sender_avatar_url'),
|
||||
senderNodeDomain: text('sender_node_domain'), // null if local
|
||||
|
||||
// Message content (encrypted for recipient)
|
||||
encryptedContent: text('encrypted_content').notNull(),
|
||||
|
||||
// Swarm sync info
|
||||
swarmMessageId: text('swarm_message_id').unique(), // Format: swarm:domain:uuid
|
||||
|
||||
// Status tracking
|
||||
deliveredAt: timestamp('delivered_at'),
|
||||
readAt: timestamp('read_at'),
|
||||
|
||||
// Metadata
|
||||
createdAt: timestamp('created_at').defaultNow().notNull(),
|
||||
}, (table) => [
|
||||
index('chat_messages_conversation_idx').on(table.conversationId),
|
||||
index('chat_messages_created_idx').on(table.createdAt),
|
||||
index('chat_messages_swarm_id_idx').on(table.swarmMessageId),
|
||||
]);
|
||||
|
||||
export const chatMessagesRelations = relations(chatMessages, ({ one }) => ({
|
||||
conversation: one(chatConversations, {
|
||||
fields: [chatMessages.conversationId],
|
||||
references: [chatConversations.id],
|
||||
}),
|
||||
}));
|
||||
|
||||
/**
|
||||
* Typing indicators for real-time chat UX.
|
||||
* Short-lived records that expire after 10 seconds.
|
||||
*/
|
||||
export const chatTypingIndicators = pgTable('chat_typing_indicators', {
|
||||
id: uuid('id').primaryKey().defaultRandom(),
|
||||
|
||||
conversationId: uuid('conversation_id').notNull().references(() => chatConversations.id, { onDelete: 'cascade' }),
|
||||
userHandle: text('user_handle').notNull(),
|
||||
|
||||
expiresAt: timestamp('expires_at').notNull(),
|
||||
createdAt: timestamp('created_at').defaultNow().notNull(),
|
||||
}, (table) => [
|
||||
index('chat_typing_conversation_idx').on(table.conversationId),
|
||||
index('chat_typing_expires_idx').on(table.expiresAt),
|
||||
uniqueIndex('chat_typing_unique').on(table.conversationId, table.userHandle),
|
||||
]);
|
||||
|
||||
@@ -0,0 +1,83 @@
|
||||
/**
|
||||
* Swarm Chat Cryptography
|
||||
*
|
||||
* End-to-end encryption for chat messages using public key cryptography.
|
||||
*/
|
||||
|
||||
import crypto from 'crypto';
|
||||
|
||||
/**
|
||||
* Encrypt a message using the recipient's public key
|
||||
*/
|
||||
export function encryptMessage(message: string, recipientPublicKey: string): string {
|
||||
try {
|
||||
// Use RSA-OAEP for encryption
|
||||
const encrypted = crypto.publicEncrypt(
|
||||
{
|
||||
key: recipientPublicKey,
|
||||
padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
|
||||
oaepHash: 'sha256',
|
||||
},
|
||||
Buffer.from(message, 'utf8')
|
||||
);
|
||||
|
||||
return encrypted.toString('base64');
|
||||
} catch (error) {
|
||||
console.error('Failed to encrypt message:', error);
|
||||
throw new Error('Encryption failed');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Decrypt a message using the recipient's private key
|
||||
*/
|
||||
export function decryptMessage(encryptedMessage: string, privateKey: string): string {
|
||||
try {
|
||||
const decrypted = crypto.privateDecrypt(
|
||||
{
|
||||
key: privateKey,
|
||||
padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
|
||||
oaepHash: 'sha256',
|
||||
},
|
||||
Buffer.from(encryptedMessage, 'base64')
|
||||
);
|
||||
|
||||
return decrypted.toString('utf8');
|
||||
} catch (error) {
|
||||
console.error('Failed to decrypt message:', error);
|
||||
throw new Error('Decryption failed');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sign a message payload for authenticity verification
|
||||
*/
|
||||
export function signPayload(payload: string, privateKey: string): string {
|
||||
try {
|
||||
const sign = crypto.createSign('SHA256');
|
||||
sign.update(payload);
|
||||
sign.end();
|
||||
|
||||
const signature = sign.sign(privateKey, 'base64');
|
||||
return signature;
|
||||
} catch (error) {
|
||||
console.error('Failed to sign payload:', error);
|
||||
throw new Error('Signing failed');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Verify a signed payload
|
||||
*/
|
||||
export function verifySignature(payload: string, signature: string, publicKey: string): boolean {
|
||||
try {
|
||||
const verify = crypto.createVerify('SHA256');
|
||||
verify.update(payload);
|
||||
verify.end();
|
||||
|
||||
return verify.verify(publicKey, signature, 'base64');
|
||||
} catch (error) {
|
||||
console.error('Failed to verify signature:', error);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,66 @@
|
||||
/**
|
||||
* Swarm Chat Types
|
||||
*
|
||||
* Type definitions for the swarm chat system.
|
||||
*/
|
||||
|
||||
export interface SwarmChatMessage {
|
||||
id: string;
|
||||
conversationId: string;
|
||||
senderHandle: string;
|
||||
senderDisplayName?: string;
|
||||
senderAvatarUrl?: string;
|
||||
senderNodeDomain?: string;
|
||||
encryptedContent: string;
|
||||
deliveredAt?: string;
|
||||
readAt?: string;
|
||||
createdAt: string;
|
||||
}
|
||||
|
||||
export interface SwarmChatConversation {
|
||||
id: string;
|
||||
type: 'direct' | 'group';
|
||||
participant1Id: string;
|
||||
participant2Handle: string;
|
||||
lastMessageAt?: string;
|
||||
lastMessagePreview?: string;
|
||||
unreadCount?: number;
|
||||
createdAt: string;
|
||||
updatedAt: string;
|
||||
}
|
||||
|
||||
/**
|
||||
* Payload for sending a chat message to a remote node
|
||||
*/
|
||||
export interface SwarmChatMessagePayload {
|
||||
messageId: string;
|
||||
senderHandle: string;
|
||||
senderDisplayName?: string;
|
||||
senderAvatarUrl?: string;
|
||||
senderNodeDomain: string;
|
||||
recipientHandle: string;
|
||||
encryptedContent: string;
|
||||
timestamp: string;
|
||||
signature?: string;
|
||||
}
|
||||
|
||||
/**
|
||||
* Payload for typing indicator
|
||||
*/
|
||||
export interface SwarmChatTypingPayload {
|
||||
senderHandle: string;
|
||||
senderNodeDomain: string;
|
||||
recipientHandle: string;
|
||||
isTyping: boolean;
|
||||
timestamp: string;
|
||||
}
|
||||
|
||||
/**
|
||||
* Payload for read receipt
|
||||
*/
|
||||
export interface SwarmChatReadReceiptPayload {
|
||||
messageId: string;
|
||||
readerHandle: string;
|
||||
readerNodeDomain: string;
|
||||
timestamp: string;
|
||||
}
|
||||
Reference in New Issue
Block a user