Add admin-controlled signup toggle and hide signup links.

handlers/about.go

@@ -29,6 +29,7 @@ func AboutHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - About",
 				Navbar:           "about",
 				LoggedIn:         loggedIn,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/admin.go

@@ -0,0 +1,89 @@
+package handlers
+
+import (
+	"log"
+	"net/http"
+	"threadr/models"
+
+	"github.com/gorilla/sessions"
+)
+
+func AdminHandler(app *App) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		session := r.Context().Value("session").(*sessions.Session)
+		userID, ok := session.Values["user_id"].(int)
+		if !ok {
+			http.Redirect(w, r, app.Config.ThreadrDir+"/login/", http.StatusFound)
+			return
+		}
+
+		user, err := models.GetUserByID(app.DB, userID)
+		if err != nil {
+			log.Printf("Error fetching user in AdminHandler: %v", err)
+			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+			return
+		}
+		if user == nil || !models.HasGlobalPermission(user, models.PermManageUsers) {
+			http.Error(w, "Forbidden", http.StatusForbidden)
+			return
+		}
+
+		cookie, _ := r.Cookie("threadr_cookie_banner")
+
+		if r.Method == http.MethodPost {
+			if !app.validateCSRFToken(r, session) {
+				http.Error(w, "Invalid CSRF token", http.StatusForbidden)
+				return
+			}
+
+			allowSignup := r.FormValue("allow_signup") == "on"
+			if err := models.SetAllowSignup(app.DB, allowSignup); err != nil {
+				log.Printf("Error updating site settings in AdminHandler: %v", err)
+				http.Error(w, "Failed to save settings", http.StatusInternalServerError)
+				return
+			}
+
+			http.Redirect(w, r, app.Config.ThreadrDir+"/admin/?saved=true", http.StatusFound)
+			return
+		}
+
+		if r.Method != http.MethodGet {
+			http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
+			return
+		}
+
+		settings, err := models.GetSiteSettings(app.DB)
+		if err != nil {
+			log.Printf("Error fetching site settings in AdminHandler: %v", err)
+			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+			return
+		}
+
+		data := struct {
+			PageData
+			AllowSignup bool
+			ShowSuccess bool
+		}{
+			PageData: PageData{
+				Title:            "ThreadR - Admin",
+				Navbar:           "admin",
+				LoggedIn:         true,
+				IsAdmin:          true,
+				AllowSignup:      settings.AllowSignup,
+				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
+				BasePath:         app.Config.ThreadrDir,
+				StaticPath:       app.Config.ThreadrDir + "/static",
+				CurrentURL:       r.URL.RequestURI(),
+				CSRFToken:        app.csrfToken(session),
+			},
+			AllowSignup: settings.AllowSignup,
+			ShowSuccess: r.URL.Query().Get("saved") == "true",
+		}
+
+		if err := app.Tmpl.ExecuteTemplate(w, "admin", data); err != nil {
+			log.Printf("Error executing template in AdminHandler: %v", err)
+			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+			return
+		}
+	}
+}

handlers/app.go

@@ -14,6 +14,8 @@ type PageData struct {
 	Title            string
 	Navbar           string
 	LoggedIn         bool
+	IsAdmin          bool
+	AllowSignup      bool
 	ShowCookieBanner bool
 	BasePath         string
 	StaticPath       string

handlers/board.go

@@ -119,6 +119,7 @@ func BoardHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - " + board.Name,
 				Navbar:           "boards",
 				LoggedIn:         loggedIn,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/boards.go

@@ -107,6 +107,7 @@ func BoardsHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - Boards",
 				Navbar:           "boards",
 				LoggedIn:         loggedIn,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/chat.go

@@ -239,6 +239,7 @@ func ChatHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR Chat - " + board.Name,
 				Navbar:           "boards",
 				LoggedIn:         true,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/home.go

@@ -19,6 +19,7 @@ func HomeHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - Home",
 				Navbar:           "home",
 				LoggedIn:         loggedIn,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       filepath.Join(app.Config.ThreadrDir, "static"),

handlers/login.go

@@ -52,18 +52,21 @@ func LoginHandler(app *App) http.HandlerFunc {
 			Error string
 		}{
 			PageData: PageData{
-				Title:      "ThreadR - Login",
+				Title:       "ThreadR - Login",
-				Navbar:     "login",
+				Navbar:      "login",
-				LoggedIn:   false,
+				LoggedIn:    false,
-				BasePath:   app.Config.ThreadrDir,
+				AllowSignup: app.allowSignup(),
-				StaticPath: app.Config.ThreadrDir + "/static",
+				BasePath:    app.Config.ThreadrDir,
-				CurrentURL: r.URL.RequestURI(),
+				StaticPath:  app.Config.ThreadrDir + "/static",
-				CSRFToken:  app.csrfToken(session),
+				CurrentURL:  r.URL.RequestURI(),
+				CSRFToken:   app.csrfToken(session),
 			},
 			Error: "",
 		}
 		if r.URL.Query().Get("error") == "invalid" {
 			data.Error = "Invalid username or password"
+		} else if r.URL.Query().Get("error") == "signup_disabled" {
+			data.Error = "Sign up is currently disabled by the administrator"
 		}
 
 		if err := app.Tmpl.ExecuteTemplate(w, "login", data); err != nil {

handlers/news.go

@@ -86,6 +86,7 @@ func NewsHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - News",
 				Navbar:           "news",
 				LoggedIn:         loggedIn,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/preferences.go

@@ -70,6 +70,7 @@ func PreferencesHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - Preferences",
 				Navbar:           "preferences",
 				LoggedIn:         true,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: false,
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/profile.go

@@ -38,6 +38,7 @@ func ProfileHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - Profile",
 				Navbar:           "profile",
 				LoggedIn:         true,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: false,
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/profile_edit.go

@@ -133,6 +133,7 @@ func ProfileEditHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - Edit Profile",
 				Navbar:           "profile",
 				LoggedIn:         true,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: false,
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/signup.go

@@ -11,6 +11,18 @@ func SignupHandler(app *App) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		session := r.Context().Value("session").(*sessions.Session)
 		cookie, _ := r.Cookie("threadr_cookie_banner")
+
+		settings, err := models.GetSiteSettings(app.DB)
+		if err != nil {
+			log.Printf("Error fetching site settings in SignupHandler: %v", err)
+			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+			return
+		}
+		if !settings.AllowSignup {
+			http.Redirect(w, r, app.Config.ThreadrDir+"/login/?error=signup_disabled", http.StatusFound)
+			return
+		}
+
 		if r.Method == http.MethodPost {
 			if !app.validateCSRFToken(r, session) {
 				http.Error(w, "Invalid CSRF token", http.StatusForbidden)
@@ -32,6 +44,7 @@ func SignupHandler(app *App) http.HandlerFunc {
 						Title:            "ThreadR - Sign Up",
 						Navbar:           "signup",
 						LoggedIn:         false,
+						AllowSignup:      true,
 						ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 						BasePath:         app.Config.ThreadrDir,
 						StaticPath:       app.Config.ThreadrDir + "/static",
@@ -59,6 +72,7 @@ func SignupHandler(app *App) http.HandlerFunc {
 						Title:            "ThreadR - Sign Up",
 						Navbar:           "signup",
 						LoggedIn:         false,
+						AllowSignup:      true,
 						ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 						BasePath:         app.Config.ThreadrDir,
 						StaticPath:       app.Config.ThreadrDir + "/static",
@@ -85,6 +99,7 @@ func SignupHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - Sign Up",
 				Navbar:           "signup",
 				LoggedIn:         session.Values["user_id"] != nil,
+				AllowSignup:      true,
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/site_settings.go

@@ -0,0 +1,16 @@
+package handlers
+
+import (
+	"log"
+	"threadr/models"
+)
+
+func (app *App) allowSignup() bool {
+	settings, err := models.GetSiteSettings(app.DB)
+	if err != nil {
+		log.Printf("Error fetching site settings: %v", err)
+		return true
+	}
+
+	return settings.AllowSignup
+}

handlers/thread.go

@@ -165,6 +165,7 @@ func ThreadHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - " + thread.Title,
 				Navbar:           "boards",
 				LoggedIn:         loggedIn,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

handlers/userhome.go

@@ -25,6 +25,9 @@ func UserHomeHandler(app *App) http.HandlerFunc {
 			http.Error(w, "User not found", http.StatusNotFound)
 			return
 		}
+
+		isAdmin := models.HasGlobalPermission(user, models.PermManageUsers)
+
 		data := struct {
 			PageData
 			Username string
@@ -33,6 +36,8 @@ func UserHomeHandler(app *App) http.HandlerFunc {
 				Title:            "ThreadR - User Home",
 				Navbar:           "userhome",
 				LoggedIn:         true,
+				IsAdmin:          isAdmin,
+				AllowSignup:      app.allowSignup(),
 				ShowCookieBanner: false,
 				BasePath:         app.Config.ThreadrDir,
 				StaticPath:       app.Config.ThreadrDir + "/static",

main.go

@@ -231,6 +231,12 @@ func createTablesIfNotExist(db *sql.DB) error {
 		return fmt.Errorf("error creating user_preferences table: %v", err)
 	}
 
+	// Create site_settings table
+	err = models.EnsureSiteSettings(db)
+	if err != nil {
+		return fmt.Errorf("error ensuring site_settings table: %v", err)
+	}
+
 	log.Println("Database tables created.")
 	return nil
 }
@@ -351,6 +357,11 @@ func main() {
 	// Normal startup (without automatic table creation)
 	log.Println("Starting ThreadR server...")
 
+	err = models.EnsureSiteSettings(db)
+	if err != nil {
+		log.Fatal("Error ensuring site_settings table:", err)
+	}
+
 	dir, err := os.Getwd()
 	if err != nil {
 		log.Fatal("Error getting working directory:", err)
@@ -364,6 +375,7 @@ func main() {
 
 	// Parse page-specific templates with unique names
 	pageTemplates := []string{
+		"admin.html",
 		"about.html",
 		"board.html",
 		"boards.html",
@@ -428,6 +440,7 @@ func main() {
 	handleAuthed("/profile/", handlers.ProfileHandler(app))
 	handleAuthed("/profile/edit/", handlers.ProfileEditHandler(app))
 	handleAuthed("/preferences/", handlers.PreferencesHandler(app))
+	handleAuthed("/admin/", handlers.AdminHandler(app))
 	handleAuthed("/like/", handlers.LikeHandler(app))
 	handle("/news/", handlers.NewsHandler(app))
 	handle("/signup/", handlers.SignupHandler(app))

models/site_settings.go

@@ -0,0 +1,43 @@
+package models
+
+import "database/sql"
+
+const siteSettingsID = 1
+
+type SiteSettings struct {
+	AllowSignup bool
+}
+
+func EnsureSiteSettings(db *sql.DB) error {
+	_, err := db.Exec(`
+		CREATE TABLE IF NOT EXISTS site_settings (
+			id INT PRIMARY KEY,
+			allow_signup BOOLEAN NOT NULL DEFAULT TRUE,
+			updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+		)`)
+	if err != nil {
+		return err
+	}
+
+	_, err = db.Exec(`
+		INSERT INTO site_settings (id, allow_signup)
+		VALUES (?, TRUE)
+		ON DUPLICATE KEY UPDATE id = id
+	`, siteSettingsID)
+	return err
+}
+
+func GetSiteSettings(db *sql.DB) (*SiteSettings, error) {
+	settings := &SiteSettings{}
+	err := db.QueryRow("SELECT allow_signup FROM site_settings WHERE id = ?", siteSettingsID).Scan(&settings.AllowSignup)
+	if err != nil {
+		return nil, err
+	}
+
+	return settings, nil
+}
+
+func SetAllowSignup(db *sql.DB, allowSignup bool) error {
+	_, err := db.Exec("UPDATE site_settings SET allow_signup = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?", allowSignup, siteSettingsID)
+	return err
+}

templates/pages/admin.html

@@ -0,0 +1,39 @@
+{{define "admin"}}
+<!DOCTYPE html>
+<html>
+<head>
+    <title>{{.Title}}</title>
+    <link rel="stylesheet" href="{{.StaticPath}}/style.css">
+    <script src="{{.StaticPath}}/app.js" defer></script>
+</head>
+<body>
+    {{template "navbar" .}}
+    <main>
+        <header>
+            <h2>Admin Panel</h2>
+        </header>
+        {{if .ShowSuccess}}
+        <div class="notification success" style="position: static; margin-bottom: 1em; animation: none;">
+            Settings saved successfully!
+        </div>
+        {{end}}
+        <section>
+            <h3>Registration</h3>
+            <form method="post" action="{{.BasePath}}/admin/">
+                <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
+                <label for="allow_signup" style="display: flex; align-items: center; gap: 0.5em; cursor: pointer;">
+                    <input type="checkbox" id="allow_signup" name="allow_signup" {{if .AllowSignup}}checked{{end}}>
+                    <span>Allow new user signups</span>
+                </label>
+                <p style="margin-left: 1.5em; margin-top: 0.25em; font-size: 0.9em; opacity: 0.8;">
+                    When disabled, the signup page redirects to login and prevents account creation.
+                </p>
+
+                <input type="submit" value="Save Settings" style="margin-top: 1.5em;">
+            </form>
+        </section>
+    </main>
+    {{template "cookie_banner" .}}
+</body>
+</html>
+{{end}}

templates/pages/userhome.html

@@ -14,9 +14,12 @@
         </header>
         <section>
             <p>This is your user home page.</p>
+            {{if .IsAdmin}}
+            <p><a href="{{.BasePath}}/admin/">Go to Admin Panel</a></p>
+            {{end}}
         </section>
     </main>
     {{template "cookie_banner" .}}
 </body>
 </html>
-{{end}}
+{{end}}

templates/partials/navbar.html

@@ -5,14 +5,19 @@
     <li><a {{if eq .Navbar "userhome"}}class="active"{{end}} href="{{.BasePath}}/userhome/">User Home</a></li>
     <li><a {{if eq .Navbar "profile"}}class="active"{{end}} href="{{.BasePath}}/profile/">Profile</a></li>
     <li><a {{if eq .Navbar "preferences"}}class="active"{{end}} href="{{.BasePath}}/preferences/">Preferences</a></li>
+    {{if .IsAdmin}}
+    <li><a {{if eq .Navbar "admin"}}class="active"{{end}} href="{{.BasePath}}/admin/">Admin</a></li>
+    {{end}}
     <li><a href="{{.BasePath}}/logout/">Logout</a></li>
     {{else}}
     <li><a {{if eq .Navbar "login"}}class="active"{{end}} href="{{.BasePath}}/login/">Login</a></li>
+    {{if .AllowSignup}}
     <li><a {{if eq .Navbar "signup"}}class="active"{{end}} href="{{.BasePath}}/signup/">Sign Up</a></li>
     {{end}}
+    {{end}}
     <li><a {{if eq .Navbar "boards"}}class="active"{{end}} href="{{.BasePath}}/boards/">Boards</a></li>
     <li><a {{if eq .Navbar "news"}}class="active"{{end}} href="{{.BasePath}}/news/">News</a></li>
     <li><a {{if eq .Navbar "about"}}class="active"{{end}} href="{{.BasePath}}/about/">About</a></li>
 </ul>
 <div class="topnav"></div>
-{{end}}
+{{end}}