town/cmd/welcome/main.go

210 lines
4.9 KiB
Go

package main
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"os"
"os/exec"
"git.tilde.town/tildetown/town/invites"
"git.tilde.town/tildetown/town/stats"
"git.tilde.town/tildetown/town/towndb"
"github.com/charmbracelet/lipgloss"
_ "embed"
)
// TODO add logging like the signup tool has
// TODO consider merging adduser, usermod, and createkeyfile into single createuser helper to limit sudoers list
// TODO move magic key machine to static page
// TODO link to code of conduct as part of the form and ask if they agree
// TODO add alerts for new users (mailing list post, irc post, etc(?))
//go:embed welcome.txt
var welcomeArt string
type newUserData struct {
Username string
DisplayName string
Email string
PubKey string
}
func defaultStyle() lipgloss.Style {
return lipgloss.NewStyle().
Foreground(lipgloss.AdaptiveColor{
Light: "#7D19BD",
Dark: "#E0B0FF",
})
}
func _main() error {
inviteDB, err := invites.ConnectDB()
if err != nil {
return err
}
s := defaultStyle().SetString(welcomeArt)
fmt.Println(s)
code, err := promptCode()
if err != nil {
return err
}
invite, err := invites.Get(inviteDB, code)
if err != nil {
return fmt.Errorf("could not look up invite code: %w", err)
}
if invite.Used {
return errors.New("that invite code has already been used.")
}
s = s.SetString("thanks!! just gotta collect some information now and then your account will be ready.")
fmt.Println(s)
townData, err := stats.Stats()
if err != nil {
return err
}
data := &newUserData{
Email: invite.Email,
}
a := &asker{
UserData: data,
Invite: *invite,
TownData: townData,
Style: defaultStyle(),
}
if err = a.Ask(); err != nil {
return err
}
conf, err := confirmContinue()
if err != nil {
return err
}
if !conf {
for !conf {
if err = a.Ask(); err != nil {
return err
}
if conf, err = confirmContinue(); err != nil {
return err
}
}
}
s = s.SetString("cool, awesome, going to make your account now...")
fmt.Println(s)
if err = createUser(*data); err != nil {
s = s.SetString(fmt.Sprintf(`augh, I'm sorry. the account creation failed.
Please email root@tilde.town and paste the following error:
%s
Your invite code has not been marked as used and you're welcome to try again,
though if there is a system issue you might need to wait for word from an admin.`, err.Error()))
fmt.Println(s)
return nil
}
s = s.SetString(fmt.Sprintf(`OK! your user account has been created.
welcome, ~%[1]s <3
This program is going to exit and you are now free to ssh to town as yourself:
ssh %[1]s@tilde.town
if your public key isn't found by ssh, you'll need to explain to ssh how to find it with:
ssh -i "replace with path to public key file" %[1]s@tilde.town
for help with ssh, see: https://tilde.town/wiki/getting-started/ssh.html
if you end up very stuck, you can email root@tilde.town .`, data.Username))
fmt.Println(s)
if err = invite.MarkUsed(inviteDB); err != nil {
return fmt.Errorf("could not mark invite as used: %w", err)
}
// TODO burn invite
return nil
}
func createUser(data newUserData) (err error) {
cmd := exec.Command("sudo", "/usr/sbin/adduser", "--quiet", "--disabled-password", data.Username)
if err = cmd.Run(); err != nil {
return fmt.Errorf("adduser failed: %w", err)
}
cmd = exec.Command("sudo", "/usr/sbin/usermod", "-a", "-G", "town", data.Username)
if err = cmd.Run(); err != nil {
return fmt.Errorf("usermod failed: %w", err)
}
cmd = exec.Command("sudo", "--user", data.Username, "/town/bin/createkeyfile", data.Username)
cmd.Stdin = bytes.NewBufferString(keyfileText(data))
stdoutBuff := bytes.NewBuffer([]byte{})
cmd.Stdout = stdoutBuff
if err = cmd.Run(); err != nil {
return fmt.Errorf("createkeyfile failed with '%s': %w", string(stdoutBuff.Bytes()), err)
}
cmd = exec.Command("sudo", "/town/bin/generate_welcome_present.sh", data.Username)
if err = cmd.Run(); err != nil {
// TODO log this. no reason to bail out.
}
tu := towndb.TownUser{
Username: data.Username,
Emails: []string{
data.Email,
},
State: towndb.StateActive,
}
var out []byte
if out, err = json.Marshal(tu); err != nil {
return fmt.Errorf("could not serialize user data: %w", err)
}
cmd = exec.Command("sudo", "/town/bin/registeruser")
stderrBuff := bytes.NewBuffer([]byte{})
cmd.Stderr = stderrBuff
cmd.Stdin = bytes.NewBuffer(out)
if err = cmd.Run(); err != nil {
return fmt.Errorf("register user failed with '%s': %w", string(stderrBuff.Bytes()), err)
}
return nil
}
func keyfileText(data newUserData) string {
header := `########## GREETINGS! ##########
# Hi! This file was automatically generated by tilde.town when
# your account was created. You can edit it if you want, but we
# recommend adding stuff to ~/.ssh/authorized_keys instead.`
return fmt.Sprintf("%s\n%s", header, data.PubKey)
}
func main() {
// TODO friendlier error handling
err := _main()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}