AI Meeting Digest Implementation

.env.local.example

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+# Supabase
+NEXT_PUBLIC_SUPABASE_URL=your_supabase_project_url
+NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
+
+# Google Gemini API
+GOOGLE_GEMINI_API_KEY=your_google_gemini_api_key

.eslintrc.json

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+{
+  "extends": "next/core-web-vitals",
+  "rules": {
+    "@next/next/no-img-element": "off"
+  }
+}

.gitignore

@@ -120,7 +120,7 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
+# lib/  # Commented out for Next.js project
 lib64/
 parts/
 sdist/

CANDIDATE_README.md

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+# AI Meeting Digest - Candidate Submission
+
+### 1. Technology Choices
+
+* **Frontend:** Next.js 15, React 19, TypeScript, Tailwind CSS
+* **Backend:** Next.js API Routes
+* **Database:** Supabase (PostgreSQL)
+* **AI Service:** Google Gemini API
+
+I chose this stack because:
+- **Next.js 15** provides an excellent full-stack framework with built-in API routes, server-side rendering, and excellent developer experience
+- **TypeScript** ensures type safety and better code maintainability
+- **Tailwind CSS** allows rapid UI development with utility-first classes
+- **Supabase** offers a managed PostgreSQL database with real-time capabilities and built-in authentication (for future enhancements)
+- **Google Gemini API** provides powerful AI capabilities with streaming support and a generous free tier
+
+### 2. How to Run the Project
+
+**Prerequisites:**
+- Node.js 18+ and npm
+- Supabase account (free tier works)
+- Google AI Studio account for Gemini API key (free)
+
+**Step-by-step instructions:**
+
+1. Clone the repository:
+```bash
+git clone https://github.com/your-username/work4u-interview.git
+cd work4u-interview
+```
+
+2. Install dependencies:
+```bash
+npm install
+```
+
+3. Set up environment variables:
+```bash
+cp .env.local.example .env.local
+```
+
+4. Edit `.env.local` with your credentials:
+```
+NEXT_PUBLIC_SUPABASE_URL=your_supabase_project_url
+NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
+GOOGLE_GEMINI_API_KEY=your_google_gemini_api_key
+```
+
+5. Set up Supabase database:
+   - Create a new Supabase project at https://supabase.com
+   - Go to SQL Editor and run the commands from `supabase-schema.sql`
+   - Copy your project URL and anon key from Settings → API
+
+6. Get Google Gemini API key:
+   - Visit https://aistudio.google.com/app/apikey
+   - Create a new API key
+   - Add it to `.env.local`
+
+7. Run the development server:
+```bash
+npm run dev
+```
+
+8. Open http://localhost:3000 in your browser
+
+### 3. Design Decisions & Trade-offs
+
+**Key Design Decisions:**
+
+1. **Real-time Streaming Implementation:**
+   - Used Server-Sent Events (SSE) instead of WebSockets for simplicity
+   - Created a toggle to switch between streaming and non-streaming modes
+   - Implemented progressive text rendering with a dedicated streaming display area
+
+2. **Database Design:**
+   - Single `digests` table with JSON arrays for decisions and action items
+   - Added `public_id` field for shareable links using nanoid for short, URL-safe IDs
+   - Indexed `public_id` and `created_at` for better query performance
+
+3. **UI/UX Improvements:**
+   - Modern gradient design with glassmorphism effects
+   - Added loading states, error handling, and success feedback
+   - Implemented copy-to-clipboard functionality for share links
+   - Responsive design that works well on mobile and desktop
+
+4. **API Structure:**
+   - Separate endpoints for streaming (`/api/digest/stream`) and non-streaming (`/api/digest/create`)
+   - Pagination support in list endpoint for scalability
+   - Error handling with appropriate HTTP status codes
+
+**Trade-offs:**
+
+1. **No Authentication:** Kept the app simple without user accounts, but added public IDs for basic access control
+2. **Client-side State Management:** Used React hooks instead of a state management library for simplicity
+3. **Streaming Parsing:** Basic text parsing for structured data extraction during streaming - could be improved with more sophisticated NLP
+
+**What I Would Do Differently with More Time:**
+
+1. **Testing:** Implement comprehensive unit and integration tests using Jest and React Testing Library
+2. **Authentication:** Add Supabase Auth for user accounts and private digests
+3. **Enhanced Streaming:** Implement markdown parsing during streaming for better formatting
+4. **Caching:** Add Redis or Supabase caching for frequently accessed digests
+5. **Export Features:** Add PDF and Word document export functionality
+6. **Webhook Support:** Allow integration with Slack/Teams for automatic digest sharing
+
+### 4. AI Usage Log
+
+I used AI programming assistants extensively throughout this project:
+
+1. **Project Setup & Architecture:**
+   - Used Claude to help design the initial project structure and database schema
+   - Asked for best practices for Next.js 15 app router implementation
+
+2. **Streaming Implementation:**
+   - Consulted on the best approach for implementing SSE with Next.js
+   - Got help debugging CORS issues and proper header configuration
+   - Used AI to understand the Gemini streaming API documentation
+
+3. **UI Components:**
+   - Generated initial Tailwind CSS classes for the gradient backgrounds
+   - Asked for modern UI design patterns and animation suggestions
+   - Got help with responsive design breakpoints
+
+4. **Error Handling:**
+   - Used AI to implement comprehensive error boundaries
+   - Asked for best practices in API error responses
+   - Got suggestions for user-friendly error messages
+
+5. **Database Queries:**
+   - Optimized Supabase queries with AI assistance
+   - Implemented proper indexing strategies
+   - Learned about Row Level Security considerations
+
+6. **Code Quality:**
+   - Used AI for TypeScript type definitions
+   - Asked for ESLint rule recommendations
+   - Got help with code organization and file structure
+
+The AI assistants were invaluable for rapid development, helping me understand new APIs quickly and implement features I hadn't used before. They were particularly helpful for debugging streaming issues and optimizing performance.
+
+## Features
+
+### Core Features
+1. **Meeting Transcript Processing**: Accept raw meeting transcripts and generate AI-powered summaries
+2. **Structured Summaries**: Extract overview, key decisions, and action items
+3. **History Management**: View and access previously generated digests
+4. **Shareable Links**: Each digest has a unique public URL for sharing
+
+### Bonus Features
+1. **Real-time Streaming**: Watch the AI generate summaries in real-time using Server-Sent Events
+2. **Responsive Design**: Works seamlessly on desktop and mobile devices
+
+## Setup Instructions
+
+### Prerequisites
+- Node.js 18+ and npm
+- Supabase account
+- Google AI Studio account for Gemini API key
+
+### Installation
+
+1. Clone the repository:
+```bash
+git clone https://github.com/02inf/work4u-interview.git
+cd work4u-interview
+```
+
+2. Install dependencies:
+```bash
+npm install
+```
+
+3. Set up environment variables:
+```bash
+cp .env.local.example .env.local
+```
+
+Edit `.env.local` with your credentials:
+```
+NEXT_PUBLIC_SUPABASE_URL=your_supabase_project_url
+NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
+GOOGLE_GEMINI_API_KEY=your_google_gemini_api_key
+```
+
+4. Set up Supabase database:
+   - Create a new Supabase project
+   - Run the SQL commands in `supabase-schema.sql` in the SQL editor
+   - Copy your project URL and anon key to `.env.local`
+
+5. Get Google Gemini API key:
+   - Visit [Google AI Studio](https://makersuite.google.com/app/apikey)
+   - Create a new API key
+   - Add it to `.env.local`
+
+6. Run the development server:
+```bash
+npm run dev
+```
+
+Visit `http://localhost:3000` to see the application.
+
+## Project Structure
+
+```
+work4u-interview/
+├── app/                          # Next.js App Router
+│   ├── api/                     # API endpoints
+│   │   └── digest/              # Digest-related APIs
+│   │       ├── create/          # Create new digest
+│   │       ├── list/            # List all digests
+│   │       ├── stream/          # Streaming endpoint
+│   │       └── [id]/            # Get digest by ID
+│   ├── digest/
+│   │   └── [id]/                # Share page route
+│   ├── layout.tsx               # Root layout
+│   ├── page.tsx                 # Home page
+│   └── globals.css              # Global styles
+├── components/                   # React components
+│   ├── DigestCard.tsx           # Digest preview card
+│   └── StreamingDigest.tsx      # Streaming UI component
+├── lib/                         # Utility functions
+│   ├── supabase.ts              # Supabase client setup
+│   └── gemini.ts                # Gemini AI integration
+├── types/                       # TypeScript definitions
+│   └── digest.ts                # Digest type interfaces
+├── public/                      # Static assets
+├── .env.local.example           # Environment variables template
+├── next.config.js               # Next.js configuration
+├── tailwind.config.js           # Tailwind CSS configuration
+├── tsconfig.json                # TypeScript configuration
+└── supabase-schema.sql          # Database schema
+```
+
+## API Endpoints
+
+### POST /api/digest/create
+Create a new digest from a transcript.
+
+Request:
+```json
+{
+  "transcript": "Meeting transcript text..."
+}
+```
+
+Response:
+```json
+{
+  "digest": {
+    "id": "uuid",
+    "transcript": "...",
+    "summary": "...",
+    "overview": "...",
+    "key_decisions": ["..."],
+    "action_items": ["..."],
+    "public_id": "abc123",
+    "created_at": "2024-01-01T00:00:00Z"
+  }
+}
+```
+
+### GET /api/digest/list
+Get a list of recent digests.
+
+Query params:
+- `limit`: Number of items (default: 10)
+- `offset`: Pagination offset (default: 0)
+
+### GET /api/digest/[id]
+Get a single digest by public ID.
+
+### POST /api/digest/stream
+Create a digest with real-time streaming response (SSE).
+
+## Database Schema
+
+The application uses a single `digests` table with the following structure:
+- `id`: UUID primary key
+- `transcript`: Original meeting text
+- `summary`: Full AI-generated summary
+- `overview`: Brief overview
+- `key_decisions`: Array of decisions
+- `action_items`: Array of tasks
+- `public_id`: Unique 8-character ID for sharing
+- `created_at`: Timestamp
+
+## Development Workflow
+
+1. **Linting**: `npm run lint`
+2. **Type checking**: TypeScript checks run automatically
+3. **Building**: `npm run build`
+4. **Production**: `npm start`
+
+## Deployment
+
+### Vercel (Recommended)
+1. Push your code to GitHub
+2. Import the project in Vercel
+3. Add environment variables in Vercel dashboard
+4. Deploy
+
+### Other Platforms
+The application can be deployed to any platform that supports Next.js:
+- Railway
+- Render
+- AWS Amplify
+- Google Cloud Run
+
+## Security Considerations
+
+- API keys are stored as environment variables
+- Supabase Row Level Security can be enabled for additional protection
+- Input validation on all API endpoints
+- No sensitive data exposed in client-side code
+
+## Future Enhancements
+
+1. **User Authentication**: Add user accounts with Supabase Auth
+2. **Team Collaboration**: Share digests within teams
+3. **Export Options**: PDF, Markdown, or Word document exports
+4. **Template Support**: Different summary formats for different meeting types
+5. **Multi-language Support**: Process meetings in different languages
+6. **Analytics**: Track digest usage and engagement
+
+## Testing
+
+While formal tests weren't implemented due to time constraints, the application has been manually tested for:
+- Creating digests with various transcript lengths
+- Viewing digest history
+- Sharing digests via public links
+- Real-time streaming functionality
+- Error handling for invalid inputs
+- Responsive design on different screen sizes
+
+## Performance Optimizations
+
+- Pagination for digest list to handle large datasets
+- Indexed database columns for faster queries
+- Efficient streaming implementation
+- Client-side caching of digest data
+
+## Known Limitations
+
+1. No user authentication (by design for simplicity)
+2. Rate limiting depends on Google Gemini API quotas
+3. Large transcripts may take longer to process
+4. Streaming may not work behind certain proxies
+
+## Contact
+
+This project was created as part of the work4u interview process. For any questions or feedback, please reach out through the appropriate channels.