add MVP gui.

Author: m1k1o

cmd/serve.go

@@ -15,7 +15,17 @@ func init() {
 		Use:   "serve",
 		Short: "Start HTTP server.",
 		Run: func(cmd *cobra.Command, args []string) {
-			err := internal.Serve(config)
+			if config.Gui.Enabled {
+				go func() {
+					// TODO: Shutdown.
+					err := internal.ServeGui(config)
+					if err != nil {
+						log.Panic().Err(err).Msg("unable to start gui command")
+					}
+				}()
+			}
+
+			err := internal.ServeApp(config)
 			if err != nil {
 				log.Panic().Err(err).Msg("unable to start serve command")
 			}

config.yaml

@@ -101,3 +101,10 @@ redis:
   password: ""
   # Redis database.
   database: 0
+
+# (MVP) gui administation, very basic.
+gui:
+  # If GUI should be enabled.
+  enabled: false
+  # GUI bind address.
+  bind: "127.0.0.1:8081"

internal/config/config.go

@@ -33,9 +33,18 @@ type App struct {
 	Target string
 	Bind   string
 	Proxy  bool
-	Users  map[string]string // username:password
-	Emails []string          // list of emails or @domains
-	Roles  map[string]string // username/email:role
+
+	// username:password
+	Users     map[string]string
+	usersFile string
+
+	// list of emails or @domains
+	Emails     []string
+	emailsFile string
+
+	// username/email:role
+	Roles     map[string]string
+	rolesFile string
 
 	RedirectAllowlist []url.URL
 
@@ -205,9 +214,9 @@ func (c *App) Set() {
 	emails := viper.GetStringSlice("app.emails")
 
 	// load emails from a file
-	emailsFile := viper.GetString("app.emails_file")
-	if emailsFile != "" {
-		emailsBytes, err := os.ReadFile(emailsFile)
+	c.emailsFile = viper.GetString("app.emails_file")
+	if c.emailsFile != "" {
+		emailsBytes, err := os.ReadFile(c.emailsFile)
 		if err != nil {
 			log.Panic().Err(err).Msgf("error opening emails file")
 		}
@@ -220,9 +229,9 @@ func (c *App) Set() {
 	users := viper.GetStringSlice("app.users")
 
 	// load users from a file
-	usersFile := viper.GetString("app.users_file")
-	if usersFile != "" {
-		usersBytes, err := os.ReadFile(usersFile)
+	c.usersFile = viper.GetString("app.users_file")
+	if c.usersFile != "" {
+		usersBytes, err := os.ReadFile(c.usersFile)
 		if err != nil {
 			log.Panic().Err(err).Msgf("error opening users file")
 		}
@@ -235,9 +244,9 @@ func (c *App) Set() {
 	roles := viper.GetStringSlice("app.roles")
 
 	// load roles from a file
-	rolesFile := viper.GetString("app.roles_file")
-	if rolesFile != "" {
-		rolesBytes, err := os.ReadFile(rolesFile)
+	c.rolesFile = viper.GetString("app.roles_file")
+	if c.rolesFile != "" {
+		rolesBytes, err := os.ReadFile(c.rolesFile)
 		if err != nil {
 			log.Panic().Err(err).Msgf("error opening roles file")
 		}
@@ -324,6 +333,46 @@ func (c *App) Set() {
 	c.Expiration.Session = time.Duration(viper.GetInt64("app.expiration.session")) * time.Second
 }
 
+func (c *App) SaveEmails() error {
+	// if there is no emails file, we cannot save anything
+	if c.emailsFile == "" {
+		return fmt.Errorf("no emails file specified")
+	}
+
+	payload := []byte(strings.Join(c.Emails, "\n"))
+	return os.WriteFile(c.emailsFile, payload, 0644)
+}
+
+func (c *App) SaveUsers() error {
+	// if there is no users file, we cannot save anything
+	if c.usersFile == "" {
+		return fmt.Errorf("no users file specified")
+	}
+
+	users := []string{}
+	for username, secret := range c.Users {
+		users = append(users, fmt.Sprintf("%s:%s", username, secret))
+	}
+
+	payload := []byte(strings.Join(users, "\n"))
+	return os.WriteFile(c.usersFile, payload, 0644)
+}
+
+func (c *App) SaveRoles() error {
+	// if there is no roles file, we cannot save anything
+	if c.rolesFile == "" {
+		return fmt.Errorf("no roles file specified")
+	}
+
+	roles := []string{}
+	for user, role := range c.Roles {
+		roles = append(roles, fmt.Sprintf("%s=%s", user, role))
+	}
+
+	payload := []byte(strings.Join(roles, "\n"))
+	return os.WriteFile(c.rolesFile, payload, 0644)
+}
+
 //
 // tmpl
 //
@@ -492,3 +541,31 @@ func (c *Redis) Set() {
 	c.Password = viper.GetString("redis.password")
 	c.Database = viper.GetInt("redis.database")
 }
+
+//
+// gui
+//
+
+type Gui struct {
+	Enabled bool
+	Bind    string
+}
+
+func (Gui) Init(cmd *cobra.Command) error {
+	cmd.PersistentFlags().Bool("gui.enabled", false, "If GUI should be enabled.")
+	if err := viper.BindPFlag("gui.enabled", cmd.PersistentFlags().Lookup("gui.enabled")); err != nil {
+		return err
+	}
+
+	cmd.PersistentFlags().String("gui.bind", "127.0.0.1:8081", "Address, where is HTTP server listening.")
+	if err := viper.BindPFlag("gui.bind", cmd.PersistentFlags().Lookup("gui.bind")); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Gui) Set() {
+	c.Enabled = viper.GetBool("gui.enabled")
+	c.Bind = viper.GetString("gui.bind")
+}

internal/config/serve.go

@@ -10,6 +10,7 @@ type Serve struct {
 	Email  Email
 	Cookie Cookie
 	Redis  Redis
+	Gui    Gui
 }
 
 func (c *Serve) Init(cmd *cobra.Command) error {
@@ -33,6 +34,10 @@ func (c *Serve) Init(cmd *cobra.Command) error {
 		return err
 	}
 
+	if err := c.Gui.Init(cmd); err != nil {
+		return err
+	}
+
 	return nil
 }
 
@@ -42,4 +47,5 @@ func (c *Serve) Set() {
 	c.Email.Set()
 	c.Cookie.Set()
 	c.Redis.Set()
+	c.Gui.Set()
 }

internal/gui/emails.gohtml

@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>email-auth</title>
+    <style>
+        body {
+            font-family: Arial, Helvetica, sans-serif;
+        }
+        form {
+            display: inline-block;
+        }
+    </style>
+</head>
+<body>
+    <h1> emails </h1>
+    <a href="./">back</a>
+    <br>
+    <br>
+    <form action="./email" method="post">
+        <input type="text" name="email" placeholder="email or @domain.com">
+        <input type="hidden" name="action" value="add">
+        <input type="submit" value="add email">
+    </form>
+    <ul>
+        {{ range $email := .Emails }}
+            <li>
+            {{ $email }} &bull; <form action="./email" method="post">
+                <input type="hidden" name="email" value="{{ $email }}">
+                <input type="hidden" name="action" value="remove">
+                <input type="submit" value="remove">
+            </form>
+            </li>
+        {{ end }}
+    </ul>
+</body>