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tui.go
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tui.go
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package tui
import (
"crypto/rand"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"log"
"os"
"regexp"
"strings"
"time"
"github.com/AlecAivazis/survey/v2"
"github.com/lighthouse-p2p/lighthouse/internal/api"
"github.com/lighthouse-p2p/lighthouse/internal/desktop"
"github.com/lighthouse-p2p/lighthouse/internal/http"
"github.com/lighthouse-p2p/lighthouse/internal/models"
"github.com/lighthouse-p2p/lighthouse/internal/rtc"
"github.com/lighthouse-p2p/lighthouse/internal/signaling"
"github.com/lighthouse-p2p/lighthouse/internal/state"
"github.com/logrusorgru/aurora"
"github.com/tj/go-spin"
"golang.org/x/crypto/nacl/sign"
)
// NewUserFlow is the TUI flow used when lighthouse metadata is missing
var NewUserFlow = []*survey.Question{
{
Name: "register",
Prompt: &survey.Confirm{
Message: "metadata.json was not found in the current directory, do you want to register and create one now?",
},
Validate: survey.Required,
},
}
// NewUserAnswers contains the answers from NewUserFlow
type NewUserAnswers struct {
Register bool
}
// StartNewUserFlow starts the TUI flow and registers the user
func StartNewUserFlow() {
answers := &NewUserAnswers{}
survey.Ask(NewUserFlow, answers)
if answers.Register {
host := "localhost:3000"
survey.AskOne(
&survey.Input{
Message: "Host:",
Default: "localhost:3000",
},
&host,
survey.WithValidator(survey.Required),
)
validationRegex := regexp.MustCompile("^[a-z]+$")
nickname := ""
survey.AskOne(
&survey.Input{
Message: "Nickname:",
},
&nickname,
survey.WithValidator(survey.Required),
survey.WithValidator(func(val interface{}) error {
if !validationRegex.Match([]byte(val.(string))) {
return errors.New("Nickname must be a-z in lower case")
}
return nil
}),
)
done := make(chan bool)
go Spinner(done, "Generating a keypair", "Done")
publicKey, privateKey, err := sign.GenerateKey(rand.Reader)
if err != nil {
done <- true
fmt.Printf("%s\n", aurora.Bold(aurora.Red("Cannot generate keypair ✕")))
fmt.Printf("Error: %s\n", err)
os.Exit(1)
}
publicKeyBase64 := base64.StdEncoding.EncodeToString(publicKey[:])
privateKeyBase64 := base64.StdEncoding.EncodeToString(privateKey[:])
time.Sleep(1 * time.Second)
done <- true
done = make(chan bool)
go Spinner(done, "Registering", "Registered")
err = api.Register(fmt.Sprintf("http://%s/v1/register", host), publicKeyBase64, nickname)
if err != nil {
done <- true
// time.Sleep(64 * time.Millisecond)
fmt.Printf("\r %s\n", aurora.Bold(aurora.Red("Registration failed ✕")))
fmt.Printf(" %s %s\n", aurora.Bold(aurora.Red("Error:")), err)
os.Exit(1)
}
time.Sleep(1 * time.Second)
done <- true
time.Sleep(64 * time.Millisecond)
metadata, err := json.Marshal(models.Metadata{
PubKey: publicKeyBase64,
PrivKey: privateKeyBase64,
NickName: nickname,
Host: host,
})
if err != nil {
log.Fatalf("%s\n", err)
}
f, err := os.Create("metadata.json")
if err != nil {
log.Fatalf("%s\n", err)
}
_, err = f.WriteString(string(metadata))
if err != nil {
log.Fatalf("%s\n", err)
}
} else {
return
}
}
// AlreadyRegisteredFlow is run when metadata.json is present
func AlreadyRegisteredFlow(metadata models.Metadata, launchDesktopApp bool) {
done := make(chan bool)
go Spinner(done, "Authenticating", "Authenticated")
signalingClient := &signaling.Client{}
err := signalingClient.Init(metadata)
defer signalingClient.Close()
if err != nil {
done <- true
time.Sleep(64 * time.Millisecond)
fmt.Printf("\r %s\n", aurora.Bold(aurora.Red("Authentication failed ✕")))
fmt.Printf(" %s %s\n", aurora.Bold(aurora.Red("Error:")), err)
os.Exit(1)
}
signalingClient.Listen()
go func() {
for {
signal := <-signalingClient.SignalChan
sess := &rtc.Session{}
sess.InitAnswer(signal, func(s string) {
signalingClient.Push(s)
}, metadata.PubKey)
}
}()
time.Sleep(1 * time.Second)
done <- true
state := &state.State{}
state.Metadata = metadata
state.SignalingClient = signalingClient
sessions := &rtc.Sessions{}
sessions.Init()
time.Sleep(250 * time.Millisecond)
fmt.Printf("\n")
go http.InitFileServer(metadata)
go http.InitProxyServer(&metadata, sessions, state)
if launchDesktopApp {
go func() {
time.Sleep(time.Second)
done = make(chan bool)
go Spinner(done, "Starting desktop app", "Started the desktop app")
err = desktop.LaunchDesktopApp()
time.Sleep(250 * time.Millisecond)
done <- true
if err != nil {
// time.Sleep(64 * time.Millisecond)
fmt.Printf("\r %s\n", aurora.Bold(aurora.Red("Launching the desktop app failed ✕")))
fmt.Printf(" %s %s\n", aurora.Bold(aurora.Red("Error:")), err)
if !errors.Is(err, desktop.ErrDesktopNotSupported) {
os.Exit(1)
}
}
fmt.Printf("\n")
}()
}
// go func() {
// sess := &rtc.Session{}
// err = sess.Init("akshitg", *state)
// if err != nil {
// log.Fatalf("%s\n", err)
// }
// }()
select {}
// time.Sleep(64 * time.Millisecond)
}
// Spinner creates a terminal loading prompt
func Spinner(done chan bool, loading, loaded string) {
go func() {
s := spin.New()
s.Set(spin.Default)
loop:
for {
select {
case <-done:
fmt.Printf("\r %s %s", aurora.Bold(aurora.Green(fmt.Sprintf("%s ✓", loaded))), strings.Repeat(" ", Abs(len(loading)-len(loaded))))
break loop
default:
fmt.Printf("\r %s %s ", aurora.Bold(aurora.Cyan(loading)), s.Next())
time.Sleep(64 * time.Millisecond)
}
}
time.Sleep(64 * time.Millisecond)
}()
}
// Abs gives the absolute value of the int
func Abs(x int) int {
if x < 0 {
return -x
}
return x
}