package main

import (
    "bufio"
    "fmt"
    "net"
)

func handleConnection(c net.Conn) {

    localChan := make(chan string)

    // starts a goroutine to handle incoming message from client
    go func() {
        for {
            netData, err := bufio.NewReader(c).ReadString('\n')
            if err != nil {
                fmt.Println(err)
                return
            }
            if netData[:8] == "message:" {
                res := "back at you: " + netData[8:]
                localChan <- res
            } else if netData[:4] == "brc:" {
                //res := "broadcast: " + netData[4:]
                // what to do?
            }
        }
    }()

    // do something when received channel
    for {
        select {
        case loc := <-localChan:
            c.Write([]byte(loc))
        }
    }
}

func main() {

    l, err := net.Listen("tcp", "127.0.0.1:305")
    if err != nil {
        fmt.Println(err)
        return
    }
    defer l.Close()

    for {
        con, err := l.Accept()
        if err != nil {
            fmt.Println(err)
            return
        }

        // create separate goroutine for each new client
        go handleConnection(con)
    }
}