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3## Description
4
5This is an AI-powered Grocery Shopping assistant that turns an imprecise list of items like "milk, bread, eggs" into a Kroger cart full of groceries. It relies on the Kroger API to search each item, then uses an LLM to decide which specific UPC to add to the cart (again, using the Kroger API). Once an item is selected, we store the UPC in the database so we can avoid consulting the LLM for that item again.
6
7Households have preferences for which items to buy, and what priorities they have for each item. For example, we prefer to buy free range eggs and poultry, but don't particularly care whether they are organic or not. These details are stored in a database, which should also be consulted to add context to the LLM's decisions.
8
9## Kroger OAuth Implementation
35- **User Management**: Create/update users based on Kroger profile ID
36
37## Database Schema
38
39The database consists of the following tables:
40
41### kroger_users_1
119├── backend/
120│   ├── index.ts              # Main HTTP handler with OAuth routes
121│   ├── database/
122│   │   ├── migrations.ts     # Database schema setup
123│   │   └── krogerQueries.ts  # Database query functions
124│   └── services/
125│       └── krogerAuth.ts     # Kroger OAuth service

1// Script to set up the telegram_chats table in SQLite
2// Run this script manually to create the database table
3
4export default async function setupTelegramChatDb() {
25    `);
26
27    return "Telegram chat database table created successfully.";
28  } catch (error) {
29    console.error("Error setting up telegram_chats table:", error);

4
5* `index.ts` - this is the **entrypoint** for this whole project
6* `database/` - this contains the code for interfacing with the app's SQLite database table
7
8## Hono
26## CRUD API Routes
27
28This app has two CRUD API routes: for reading and inserting into the messages table. They both speak JSON, which is standard. They import their functions from `/backend/database/queries.ts`. These routes are called from the React app to refresh and update data.
29
30## Errors

1# Database
2
3This app uses [Val Town SQLite](https://docs.val.town/std/sqlite/) to manage data. Every Val Town account comes with a free SQLite database, hosted on [Turso](https://turso.tech/). This folder is broken up into two files:
4
5* `migrations.ts` - code to set up the database tables the app needs
6* `queries.ts` - functions to run queries against those tables, which are imported and used in the main Hono server in `/backend/index.ts`
7
8## Migrations
9
10In `backend/database/migrations.ts`, this app creates a new SQLite table `reactHonoStarter_messages` to store messages. 
11
12This "migration" runs once on every app startup because it's imported in `index.ts`. You can comment this line out for a slight (30ms) performance improvement on cold starts. It's left in so that users who fork this project will have the migration run correctly.
13
14SQLite has much more limited support for altering existing tables as compared to other databases. Often it's easier to create new tables with the schema you want, and then copy the data over. Happily LLMs are quite good at those sort of database operations, but please reach out in the [Val Town Discord](https://discord.com/invite/dHv45uN5RY) if you need help.
15
16## Queries
17
18The queries file is where running the migrations happen in this app. It'd also be reasonable for that to happen in index.ts, or as is said above, for that line to be commented out, and only run when actual changes are made to your database schema.
19
20The queries file exports functions to get and write data. It relies on shared types and data imported from the `/shared` directory.

374];
375
376// Insert memories into the database
377async function insertDemoMemories() {
378  try {
415    await insertDemoMemories();
416
417    console.log("Demo database successfully populated!");
418    return "Demo database successfully populated!";
419  } catch (error) {
420    console.error("Error populating demo database:", error);
421    throw error;
422  }

2
3/**
4 * Retrieves all memories from the database
5 * @param includeDate Whether to include date-specific memories or not
6 * @param startDate Optional start date to filter memories from (ISO format)

6import { Hono } from "npm:hono";
7import { type Memory } from "../shared/types.ts";
8import { createMemory, deleteMemory, getAllMemories, updateMemory } from "./database/queries.ts";
9
10const app = new Hono();

208```
209├── backend/
210│   ├── database/
211│   │   ├── migrations.ts    # Schema definitions
212│   │   ├── queries.ts       # DB query functions
270- Handle API calls properly with proper error catching
271
272### Database Patterns
273- Run migrations on startup or comment out for performance
274- Change table names when modifying schemas rather than altering

158    const colors = {
159      service: 'rgba(34, 197, 94, 0.8)',
160      database: 'rgba(239, 68, 68, 0.8)',
161      frontend: 'rgba(59, 130, 246, 0.8)',
162      api: 'rgba(168, 85, 247, 0.8)',
170    const icons = {
171      service: '⚙️',
172      database: '🗄️',
173      frontend: '🖥️',
174      api: '🔌',

3interface SimulationEntity {
4  id: string;
5  type: 'user' | 'service' | 'database' | 'network' | 'load_generator';
6  position: { x: number; y: number; z: number };
7  state: Record<string, any>;
622    
623    if (metrics.averageLatency > 500) {
624      recommendations.push("Optimize database queries");
625      recommendations.push("Implement caching layer");
626      recommendations.push("Consider CDN for static assets");
640      case 'api':
641        return 'service';
642      case 'database':
643        return 'database';
644      case 'frontend':
645        return 'service';