net-cat TCP Chat Server

This project implements a multi-room TCP chat server in Go. The core logic is in server.go, which manages chat rooms, client connections, and command handling.

Features

• Multiple Chat Rooms: Users can join or create rooms with /join ROOM_NAME.
• Nicknames: Users set/change their nickname with /nick NAME. Name changes are broadcast to the room.
• Room Listing: /rooms lists all available rooms.
• Message History: Messages in the "general" room are saved and replayed to new joiners.
• Help Command: /help lists available commands.
• Graceful Client Exit: /quit disconnects the user and notifies the room.
• Logging: Server logs client connections and disconnections.

Usage

Start the server:

go run main.go

or

go build && ./net-cat $PORT

Commands

• /nick NAME — Set your nickname (max 20 chars)
• /join ROOM_NAME — Join or create a room (max 30 chars)
• /rooms — List all rooms
• /msg MESSAGE — Send a message to the current room
• /quit — Leave the chat
• /help — Show available commands

File Structure

• server.go — Main server logic (rooms, clients, commands)
• client.go — Client connection and input handling
• room.go — Room struct and broadcast logic
• command.go — Command types and struct
• utils.go — Utility functions (port, shutdown, etc.)
• main.go — Entry point

Notes

• When joining the "general" room, previous messages are shown.
• Nickname and room name limits are enforced.
• Server logs are printed to the console.

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