Implement AI chat history system with enhanced memory (Phases 1 & 2)
Phase 1 - Database Schema & Basic API: - Add ChatConversation and ChatMessage tables with proper relationships - Create conversation CRUD API endpoints with authentication - Update chat API to support persistent conversations - Implement auto-generated conversation titles and language separation - Add conversation soft delete and user-specific access control Phase 2 - Enhanced Memory System: - Implement intelligent context selection beyond simple chronological order - Add relevance scoring for older messages based on keyword overlap and biblical references - Create automatic message summarization for very long conversations - Optimize token usage with smart context management (1500 token budget) - Add biblical awareness with Romanian/English book name detection - Implement time-based relevance decay for better context prioritization Frontend Improvements: - Add chat history button to floating chat header - Create basic history panel UI with placeholder content - Maintain backward compatibility for anonymous users Database Changes: - Enhanced schema with conversation relationships and message roles - Proper indexing for performance and user-specific queries - Migration completed successfully with prisma db push 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
andupetcu
266
app/api/chat/conversations/[id]/route.ts
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266
app/api/chat/conversations/[id]/route.ts
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import { NextRequest, NextResponse } from 'next/server'
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import { z } from 'zod'
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import { PrismaClient } from '@prisma/client'
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import { verifyToken } from '@/lib/auth'
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const prisma = new PrismaClient()
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export const runtime = 'nodejs'
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const updateConversationSchema = z.object({
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title: z.string().min(1).max(200).optional(),
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isActive: z.boolean().optional(),
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})
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// GET /api/chat/conversations/[id] - Get conversation with messages
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export async function GET(
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request: NextRequest,
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{ params }: { params: { id: string } }
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) {
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try {
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// Get user from authentication
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const authHeader = request.headers.get('authorization')
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if (!authHeader?.startsWith('Bearer ')) {
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return NextResponse.json(
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{ success: false, error: 'Authentication required' },
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{ status: 401 }
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)
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}
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const token = authHeader.substring(7)
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const payload = verifyToken(token)
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if (!payload) {
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return NextResponse.json(
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{ success: false, error: 'Invalid token' },
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{ status: 401 }
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)
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}
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const userId = payload.userId as string
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const conversationId = params.id
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// Get conversation with messages
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const conversation = await prisma.chatConversation.findUnique({
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where: {
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id: conversationId,
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userId, // Ensure user owns this conversation
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isActive: true
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},
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include: {
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messages: {
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orderBy: { timestamp: 'asc' },
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select: {
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id: true,
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role: true,
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content: true,
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timestamp: true,
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metadata: true
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}
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}
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}
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})
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if (!conversation) {
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return NextResponse.json(
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{ success: false, error: 'Conversation not found' },
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{ status: 404 }
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)
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}
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return NextResponse.json({
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success: true,
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conversation: {
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id: conversation.id,
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title: conversation.title,
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language: conversation.language,
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createdAt: conversation.createdAt,
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lastMessageAt: conversation.lastMessageAt,
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messages: conversation.messages.map(msg => ({
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id: msg.id,
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role: msg.role.toLowerCase(), // Convert enum to lowercase for frontend compatibility
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content: msg.content,
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timestamp: msg.timestamp,
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metadata: msg.metadata
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}))
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}
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})
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} catch (error) {
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console.error('Error fetching conversation:', error)
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return NextResponse.json(
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{
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success: false,
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error: 'Failed to fetch conversation'
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},
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{ status: 500 }
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)
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}
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}
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// PUT /api/chat/conversations/[id] - Update conversation
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export async function PUT(
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request: NextRequest,
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{ params }: { params: { id: string } }
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) {
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try {
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// Get user from authentication
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const authHeader = request.headers.get('authorization')
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if (!authHeader?.startsWith('Bearer ')) {
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return NextResponse.json(
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{ success: false, error: 'Authentication required' },
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{ status: 401 }
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)
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}
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const token = authHeader.substring(7)
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const payload = verifyToken(token)
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if (!payload) {
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return NextResponse.json(
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{ success: false, error: 'Invalid token' },
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{ status: 401 }
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)
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}
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const userId = payload.userId as string
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const conversationId = params.id
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// Parse request body
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const body = await request.json()
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const updateData = updateConversationSchema.parse(body)
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// Verify conversation ownership
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const existingConversation = await prisma.chatConversation.findUnique({
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where: {
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id: conversationId,
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userId
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}
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})
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if (!existingConversation) {
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return NextResponse.json(
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{ success: false, error: 'Conversation not found' },
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{ status: 404 }
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)
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}
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// Update conversation
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const conversation = await prisma.chatConversation.update({
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where: { id: conversationId },
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data: {
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...updateData,
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updatedAt: new Date()
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},
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include: {
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_count: {
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select: { messages: true }
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}
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}
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})
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return NextResponse.json({
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success: true,
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conversation: {
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id: conversation.id,
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title: conversation.title,
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language: conversation.language,
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messageCount: conversation._count.messages,
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lastMessageAt: conversation.lastMessageAt,
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createdAt: conversation.createdAt,
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isActive: conversation.isActive
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}
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})
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} catch (error) {
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console.error('Error updating conversation:', error)
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if (error instanceof z.ZodError) {
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return NextResponse.json(
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{
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success: false,
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error: 'Invalid request format',
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details: error.errors
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},
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{ status: 400 }
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)
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}
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return NextResponse.json(
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{
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success: false,
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error: 'Failed to update conversation'
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},
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{ status: 500 }
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)
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}
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}
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// DELETE /api/chat/conversations/[id] - Delete conversation
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export async function DELETE(
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request: NextRequest,
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{ params }: { params: { id: string } }
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) {
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try {
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// Get user from authentication
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const authHeader = request.headers.get('authorization')
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if (!authHeader?.startsWith('Bearer ')) {
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return NextResponse.json(
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{ success: false, error: 'Authentication required' },
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{ status: 401 }
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)
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}
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const token = authHeader.substring(7)
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const payload = verifyToken(token)
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if (!payload) {
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return NextResponse.json(
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{ success: false, error: 'Invalid token' },
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{ status: 401 }
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)
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}
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const userId = payload.userId as string
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const conversationId = params.id
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// Verify conversation ownership
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const existingConversation = await prisma.chatConversation.findUnique({
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where: {
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id: conversationId,
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userId
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}
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})
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if (!existingConversation) {
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return NextResponse.json(
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{ success: false, error: 'Conversation not found' },
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{ status: 404 }
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)
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}
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// Soft delete (mark as inactive) instead of hard delete to preserve data
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await prisma.chatConversation.update({
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where: { id: conversationId },
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data: {
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isActive: false,
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updatedAt: new Date()
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}
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})
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return NextResponse.json({
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success: true,
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message: 'Conversation deleted successfully'
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})
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} catch (error) {
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console.error('Error deleting conversation:', error)
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return NextResponse.json(
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{
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success: false,
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error: 'Failed to delete conversation'
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},
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{ status: 500 }
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)
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}
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}
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206
app/api/chat/conversations/route.ts
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206
app/api/chat/conversations/route.ts
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@@ -0,0 +1,206 @@
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import { NextRequest, NextResponse } from 'next/server'
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import { z } from 'zod'
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import { PrismaClient } from '@prisma/client'
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import { verifyToken } from '@/lib/auth'
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const prisma = new PrismaClient()
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export const runtime = 'nodejs'
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const createConversationSchema = z.object({
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title: z.string().min(1).max(200),
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language: z.enum(['ro', 'en']).default('ro'),
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})
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const getConversationsSchema = z.object({
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language: z.enum(['ro', 'en']).optional(),
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limit: z.string().transform(Number).pipe(z.number().min(1).max(50)).optional().default(20),
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offset: z.string().transform(Number).pipe(z.number().min(0)).optional().default(0),
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})
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// GET /api/chat/conversations - List user's conversations
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export async function GET(request: NextRequest) {
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try {
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// Get user from authentication
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const authHeader = request.headers.get('authorization')
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if (!authHeader?.startsWith('Bearer ')) {
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return NextResponse.json(
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{ success: false, error: 'Authentication required' },
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{ status: 401 }
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)
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}
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const token = authHeader.substring(7)
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const payload = verifyToken(token)
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if (!payload) {
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return NextResponse.json(
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{ success: false, error: 'Invalid token' },
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{ status: 401 }
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)
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}
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const userId = payload.userId as string
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// Parse query parameters
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const url = new URL(request.url)
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const queryParams = Object.fromEntries(url.searchParams.entries())
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const { language, limit, offset } = getConversationsSchema.parse(queryParams)
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// Build where clause
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const where: any = {
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userId,
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isActive: true
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}
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if (language) {
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where.language = language
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}
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// Get conversations with message count
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const conversations = await prisma.chatConversation.findMany({
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where,
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orderBy: { lastMessageAt: 'desc' },
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take: limit,
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skip: offset,
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include: {
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_count: {
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select: { messages: true }
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},
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messages: {
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take: 1,
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orderBy: { timestamp: 'desc' },
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select: {
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content: true,
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role: true,
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timestamp: true
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}
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}
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}
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})
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// Get total count for pagination
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const total = await prisma.chatConversation.count({ where })
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return NextResponse.json({
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success: true,
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conversations: conversations.map(conv => ({
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id: conv.id,
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title: conv.title,
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language: conv.language,
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messageCount: conv._count.messages,
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lastMessage: conv.messages[0] || null,
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lastMessageAt: conv.lastMessageAt,
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createdAt: conv.createdAt
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})),
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pagination: {
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total,
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limit,
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offset,
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hasMore: offset + limit < total
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}
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})
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} catch (error) {
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console.error('Error fetching conversations:', error)
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if (error instanceof z.ZodError) {
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return NextResponse.json(
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{
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success: false,
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error: 'Invalid request parameters',
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details: error.errors
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},
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{ status: 400 }
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)
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}
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return NextResponse.json(
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{
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success: false,
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error: 'Failed to fetch conversations'
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},
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{ status: 500 }
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)
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}
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}
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// POST /api/chat/conversations - Create new conversation
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export async function POST(request: NextRequest) {
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try {
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// Get user from authentication
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const authHeader = request.headers.get('authorization')
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if (!authHeader?.startsWith('Bearer ')) {
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return NextResponse.json(
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{ success: false, error: 'Authentication required' },
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{ status: 401 }
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)
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}
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const token = authHeader.substring(7)
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const payload = verifyToken(token)
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if (!payload) {
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return NextResponse.json(
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{ success: false, error: 'Invalid token' },
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{ status: 401 }
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)
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}
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const userId = payload.userId as string
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// Parse request body
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const body = await request.json()
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const { title, language } = createConversationSchema.parse(body)
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// Create new conversation
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const conversation = await prisma.chatConversation.create({
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data: {
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userId,
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title,
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language,
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lastMessageAt: new Date()
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},
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include: {
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_count: {
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select: { messages: true }
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}
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}
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})
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return NextResponse.json({
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success: true,
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conversation: {
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id: conversation.id,
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title: conversation.title,
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language: conversation.language,
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messageCount: conversation._count.messages,
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lastMessage: null,
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lastMessageAt: conversation.lastMessageAt,
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createdAt: conversation.createdAt
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}
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}, { status: 201 })
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} catch (error) {
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console.error('Error creating conversation:', error)
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if (error instanceof z.ZodError) {
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return NextResponse.json(
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{
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success: false,
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error: 'Invalid request format',
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details: error.errors
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},
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{ status: 400 }
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)
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}
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return NextResponse.json(
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{
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success: false,
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error: 'Failed to create conversation'
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},
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{ status: 500 }
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)
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}
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}
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Reference in New Issue
Block a user