allow to hide login form (#459) (#470)

use the `hide_login_form` parameter in the `auth` settings to configure this feature

internal/app/api/core/assets/doc/v0_swagger.json

@@ -2231,6 +2231,9 @@
                 "ApiAdminOnly": {
                     "type": "boolean"
                 },
+                "LoginFormVisible": {
+                    "type": "boolean"
+                },
                 "MailLinkOnly": {
                     "type": "boolean"
                 },

internal/app/api/core/assets/doc/v0_swagger.yaml

@@ -381,6 +381,8 @@ definitions:
     properties:
       ApiAdminOnly:
         type: boolean
+      LoginFormVisible:
+        type: boolean
       MailLinkOnly:
         type: boolean
       MinPasswordLength:

internal/app/api/v0/handlers/endpoint_config.go

@@ -96,10 +96,13 @@ func (e ConfigEndpoint) handleSettingsGet() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		sessionUser := domain.GetUserInfo(r.Context())
 
+		hasSocialLogin := len(e.cfg.Auth.OAuth) > 0 || len(e.cfg.Auth.OpenIDConnect) > 0 || e.cfg.Auth.WebAuthn.Enabled
+
 		// For anonymous users, we return the settings object with minimal information
 		if sessionUser.Id == domain.CtxUnknownUserId || sessionUser.Id == "" {
 			respond.JSON(w, http.StatusOK, model.Settings{
-				WebAuthnEnabled: e.cfg.Auth.WebAuthn.Enabled,
+				WebAuthnEnabled:  e.cfg.Auth.WebAuthn.Enabled,
+				LoginFormVisible: !e.cfg.Auth.HideLoginForm || !hasSocialLogin,
 			})
 		} else {
 			respond.JSON(w, http.StatusOK, model.Settings{
@@ -109,6 +112,7 @@ func (e ConfigEndpoint) handleSettingsGet() http.HandlerFunc {
 				ApiAdminOnly:              e.cfg.Advanced.ApiAdminOnly,
 				WebAuthnEnabled:           e.cfg.Auth.WebAuthn.Enabled,
 				MinPasswordLength:         e.cfg.Auth.MinPasswordLength,
+				LoginFormVisible:          !e.cfg.Auth.HideLoginForm || !hasSocialLogin,
 			})
 		}
 	}

internal/app/api/v0/model/models.go

@@ -12,4 +12,5 @@ type Settings struct {
 	ApiAdminOnly              bool `json:"ApiAdminOnly"`
 	WebAuthnEnabled           bool `json:"WebAuthnEnabled"`
 	MinPasswordLength         int  `json:"MinPasswordLength"`
+	LoginFormVisible          bool `json:"LoginFormVisible"`
 }

internal/config/auth.go

@@ -21,6 +21,9 @@ type Auth struct {
 	// MinPasswordLength is the minimum password length for user accounts. This also applies to the admin user.
 	// It is encouraged to set this value to at least 16 characters.
 	MinPasswordLength int `yaml:"min_password_length"`
+	// HideLoginForm specifies whether the login form should be hidden. If no social login providers are configured,
+	// the login form will be shown regardless of this setting.
+	HideLoginForm bool `yaml:"hide_login_form"`
 }
 
 // BaseFields contains the basic fields that are used to map user information from the authentication providers.

internal/config/config.go

@@ -95,6 +95,9 @@ func (c *Config) LogStartupValues() {
 		"oidcProviders", len(c.Auth.OpenIDConnect),
 		"oauthProviders", len(c.Auth.OAuth),
 		"ldapProviders", len(c.Auth.Ldap),
+		"webauthnEnabled", c.Auth.WebAuthn.Enabled,
+		"minPasswordLength", c.Auth.MinPasswordLength,
+		"hideLoginForm", c.Auth.HideLoginForm,
 	)
 }
 
@@ -169,6 +172,7 @@ func defaultConfig() *Config {
 
 	cfg.Auth.WebAuthn.Enabled = true
 	cfg.Auth.MinPasswordLength = 16
+	cfg.Auth.HideLoginForm = false
 
 	return cfg
 }