import "strings"
import "github.com/abiosoft/ishell"

func main(){
    // create new shell.
    // by default, new shell includes 'exit', 'help' and 'clear' commands.
    shell := ishell.New()

	// display welcome info.
	shell.Println("Sample Interactive Shell")

	// register a function for "greet" command.
    shell.Register("greet", func(args ...string) (string, error) {
        name := "Stranger"
        if len(args) > 0 {
            name = strings.Join(args, " ")
        }
		return "Hello "+name, nil
	})

	// start shell
	shell.Start()
}

// simulate an authentication
shell.Register("login", func(args ...string) (string, error) {
	// disable the '>>>' for cleaner same line input.
	shell.ShowPrompt(false)
	defer shell.ShowPrompt(true) // yes, revert after login.

    // get username
	shell.Print("Username: ")
	username := shell.ReadLine()

    // get password.
	shell.Print("Password: ")
	password := shell.ReadPassword()

	... // do something with username and password

    return "Authentication Successful.", nil
})

shell.Register("multi", func(args ...string) (string, error) {
	shell.Println("Input some lines:")
	// read until a semicolon ';' is found
	// use shell.ReadMultiLinesFunc for more control.
	lines := shell.ReadMultiLines(";")
	shell.Println("You wrote:")
	return lines, nil
})

// Read and write history to $HOME/.ishell_history
shell.SetHomeHistoryPath(".ishell_history")