add optional prefix to url

internal/handlers/auth.go

@@ -20,6 +20,11 @@ const sessionCookieName = "gobsidian_session"
 
 // LoginPage renders the login form
 func (h *Handlers) LoginPage(c *gin.Context) {
+    // If already authenticated, redirect to home (respect URL prefix)
+    if isAuthenticated(c) {
+        c.Redirect(http.StatusFound, h.config.URLPrefix+"/")
+        return
+    }
     token, _ := c.Get("csrf_token")
     c.HTML(http.StatusOK, "login", gin.H{
         "app_name":        h.config.AppName,
@@ -128,7 +133,7 @@ func isAllDigits(s string) bool {
 func (h *Handlers) MFALoginPage(c *gin.Context) {
     session, _ := h.store.Get(c.Request, sessionCookieName)
     if _, ok := session.Values["mfa_user_id"]; !ok {
-        c.Redirect(http.StatusFound, "/editor/login")
+        c.Redirect(http.StatusFound, h.config.URLPrefix+"/editor/login")
         return
     }
     token, _ := c.Get("csrf_token")
@@ -161,7 +166,7 @@ func (h *Handlers) MFALoginVerify(c *gin.Context) {
     session, _ := h.store.Get(c.Request, sessionCookieName)
     uidAny, ok := session.Values["mfa_user_id"]
     if !ok {
-        c.Redirect(http.StatusFound, "/editor/login")
+        c.Redirect(http.StatusFound, h.config.URLPrefix+"/editor/login")
         return
     }
     uid, _ := uidAny.(int64)
@@ -188,14 +193,14 @@ func (h *Handlers) MFALoginVerify(c *gin.Context) {
     delete(session.Values, "mfa_user_id")
     session.Values["user_id"] = uid
     _ = session.Save(c.Request, c.Writer)
-    c.Redirect(http.StatusFound, "/")
+    c.Redirect(http.StatusFound, h.config.URLPrefix+"/")
 }
 
 // ProfileMFASetupPage shows QR and input to verify during enrollment
 func (h *Handlers) ProfileMFASetupPage(c *gin.Context) {
     uidPtr := getUserIDPtr(c)
     if uidPtr == nil {
-        c.Redirect(http.StatusFound, "/editor/login")
+        c.Redirect(http.StatusFound, h.config.URLPrefix+"/editor/login")
         return
     }
     // ensure enrollment exists, otherwise create one
@@ -329,7 +334,7 @@ func (h *Handlers) LoginPost(c *gin.Context) {
         session, _ := h.store.Get(c.Request, sessionCookieName)
         session.Values["mfa_user_id"] = user.ID
         _ = session.Save(c.Request, c.Writer)
-        c.Redirect(http.StatusFound, "/editor/mfa")
+        c.Redirect(http.StatusFound, h.config.URLPrefix+"/editor/mfa")
         return
     }
 
@@ -340,7 +345,7 @@ func (h *Handlers) LoginPost(c *gin.Context) {
         session, _ := h.store.Get(c.Request, sessionCookieName)
         session.Values["user_id"] = user.ID
         _ = session.Save(c.Request, c.Writer)
-        c.Redirect(http.StatusFound, "/editor/profile/mfa/setup")
+        c.Redirect(http.StatusFound, h.config.URLPrefix+"/editor/profile/mfa/setup")
         return
     }
 
@@ -349,7 +354,7 @@ func (h *Handlers) LoginPost(c *gin.Context) {
     session.Values["user_id"] = user.ID
     _ = session.Save(c.Request, c.Writer)
 
-    c.Redirect(http.StatusFound, "/")
+    c.Redirect(http.StatusFound, h.config.URLPrefix+"/")
 }
 
 // LogoutPost clears the session
@@ -357,5 +362,5 @@ func (h *Handlers) LogoutPost(c *gin.Context) {
     session, _ := h.store.Get(c.Request, sessionCookieName)
     session.Options.MaxAge = -1
     _ = session.Save(c.Request, c.Writer)
-    c.Redirect(http.StatusFound, "/editor/login")
+    c.Redirect(http.StatusFound, h.config.URLPrefix+"/editor/login")
 }