AI Writing Assistant Backend

This is a Next.js application providing backend API endpoints for various AI-powered writing features, including chat interactions, text autocompletion, and blog post management.

Features

• /api/chat: Handles chat interactions, allowing users to interact with an AI model. It supports different modes like agent-based document modification and conversational assistance. Integrates with Composio tools.
• /api/autocomplete: Provides text autocompletion suggestions based on the current text and context, powered by an AI model.
• /api/blogs: Manages blog posts, allowing fetching and saving posts (stored as JSON files locally).

Tech Stack

• Next.js - React framework for server-side rendering and API routes.
• TypeScript - Typed superset of JavaScript.
• Vercel AI SDK - For integrating AI models and features.
• OpenAI / Google AI - Language models used for generation.
• Composio - For integrating third-party tools via Vercel AI SDK.
• dotenv - For loading environment variables.

Setup and Installation

1. Clone the repository:

   git clone <your-repository-url>
   cd <repository-directory>

2. Install dependencies:

   npm install
   # or
   yarn install

3. Set up environment variables: Create a .env file in the root directory and add the necessary API keys:

   # Required for /api/chat and /api/autocomplete
   OPENAI_API_KEY=your_openai_api_key 
   # Optional alternative model for /api/chat and /api/autocomplete (uncomment if used)
   # GOOGLE_GENERATIVE_AI_API_KEY=your_google_api_key 
   
   # Required for Composio tool integration in /api/chat
   COMPOSIO_API_KEY=your_composio_api_key 
   NEXT_PUBLIC_LOCAL_ENV=False #Change to True for full functionality
   # Add any other keys used by Composio tools or other services
   # Example: GROQ_API_KEY, MISTRAL_API_KEY, SOLANA keys... 
   # (Only include if actively used by your Composio-integrated tools)
   

   Replace your_..._key with your actual API keys.

4. Run the development server:

   npm run dev
   # or
   yarn dev

   The application will start, typically on http://localhost:3000.

API Endpoints

• POST /api/chat: Accepts JSON body with message, currentContent (optional), selections (optional), mode ('agent' or 'ask'), and composioApiKey. Returns AI-generated chat responses or document modifications.
• POST /api/autocomplete: Accepts JSON body with text, cursorPosition, and context (optional). Returns AI-generated text completion suggestions.
• GET /api/blogs: Fetches all blog posts stored in the blogs/ directory.
• POST /api/blogs: Saves a new blog post. Accepts JSON body representing the post structure.