The program is a simple mail application that supports sending, reading, and deleting messages via a Command Line Interface (CLI) using the Notion API. It allows users to:

1. Send mail to a designated user as a specified sender.
2. Read mail for a given recipient.

Additionally, these features:

• Added functionality to delete messages.
• Added better error handling and user input validation for a smoother user experience.

1. Clone the repository:

   git clone <repository-url>

2. Navigate into the project directory:

   cd MailsApp

3. Install dependencies:

   npm install

4. Setup environment variables:

   Create a .env file in the root directory and add your Notion API credentials:

   NOTION_KEY=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
   NOTION_DATABASE_ID=190dda4764cf80a99b45c9c549d9ed9b
   

5. Run the program:

   node server.js

6. Follow the interactive prompts to send, read, or delete mail.

• [Notion Build Your First API] https://developers.notion.com/docs/create-a-notion-integration#getting-started
• [Notion Authroization] https://developers.notion.com/docs/authorization
• [Notion Create a database] https://developers.notion.com/reference/create-a-database
• [Notion intro to database] https://www.notion.com/help/intro-to-databasesa
• [Node js tutorial] https://nodejs.org/en/learn/getting-started/introduction-to-nodejs
• [Command line interface and node js] https://medium.com/@manavshrivastava/lets-build-a-cli-command-line-interface-with-node-js-d3b5faacc5ea

1. User Authentication: Implement user authentication to restrict access to authorized users.
2. Message Editing: Add functionality to edit messages after they have been sent.
3. Message Search: Add the capability to search messages by keywords.
4. Improve User Interface: Enhance the CLI experience using libraries like inquirer.js to provide a more user-friendly interface.
5. Deployment: Containerize the application using Docker for easier deployment and scalability.

1. Message Editing: Allow Users to Edit Messages After Sending

• Steps: Develop an editing endpoint, ensure only the message author or admin can edit, and modify the database to include edited_at and edit_history fields. Update the CLI to include editing options.
• Key Considerations: Maintain transparency by keeping an edit history and clearly indicate edited messages to users.

2. Message Search: Add Keyword-Based Search Capability

• Steps: Implement full-text search indexing on messages, develop a search endpoint, and integrate a search feature in the CLI.
• Key Considerations: Optimize for case-insensitivity and partial matches, and sanitize search inputs for security.

3. Improve User Interface: Enhance CLI with inquirer.js

• Steps: Integrate inquirer.js to replace basic inputs with interactive prompts. Structure user workflows logically and enhance usability.
• Key Considerations: Ensure accessibility and gather user feedback to improve interaction.

These improvements aim to make the MailsApp more user-friendly and scalable, facilitating better management and user experiences.

1. Node.js and Notion SDK: Leveraged Node.js and the official Notion SDK for easy and seamless interaction with the Notion API.

2. Environment Variables: Used .env files to manage sensitive credentials, making it easier to manage in different environments.

3. Error Handling: Added comprehensive error handling to manage issues like API failures and invalid user inputs gracefully.

This guide provides a comprehensive description and steps for setup, running, and understanding the improvements made to the Notion mail app. The code is modular and extendable for future features and improvements.