Manage server registrations

Allows admins to set server registration manually and at runtime
to either

* Open (default)
* Closed
* Invite Only

The last one is new. If enabled, admins can manage invitation codes
and registration is only possible when entering a valid code.

Author: oneiros

debug_fasp/app/views/layouts/admin.html.erb

@@ -27,6 +27,10 @@
           </p>
           <% if admin_signed_in? %>
             <%= nav_link_to t(".users"), fasp_base.admin_users_path %>
+            <% if registration_invite_only? %>
+              <%= nav_link_to t(".invitation_codes"), fasp_base.admin_invitation_codes_path %>
+            <% end %>
+            <%= nav_link_to t(".settings"), fasp_base.admin_settings_path %>
           <% end %>
         </div>
         <div class="flex gap-8">

debug_fasp/app/views/layouts/application.html.erb

@@ -34,7 +34,7 @@
           <% if signed_in? %>
             <%= nav_link_to t('.sign_out'), fasp_base.session_path, data: {turbo_method: :delete} %>
           <% else %>
-            <% if FaspBase.registration_enabled? %>
+            <% if registration_enabled? %>
               <%= nav_link_to t(".sign_up"), fasp_base.new_registration_path %>
             <% end %>
             <%= nav_link_to t(".sign_in"), fasp_base.new_session_path %>

debug_fasp/config/initializers/fasp_base.rb

@@ -9,7 +9,6 @@
   f.privacy_policy_language = ENV["PRIVACY_POLICY_LANGUAGE"]
   f.contact_email = ENV["CONTACT_EMAIL"]
   f.fediverse_account = ENV["FEDIVERSE_ACCOUNT"]
-  f.registration_enabled = ENV["DISABLE_SERVER_REGISTRATION"].present? ? false : true
 end
 
 Rails.application.config.to_prepare do

debug_fasp/db/migrate/20250509081145_create_fasp_base_invitation_codes.fasp_base.rb

@@ -0,0 +1,10 @@
+# This migration comes from fasp_base (originally 20250508115122)
+class CreateFaspBaseInvitationCodes < ActiveRecord::Migration[8.0]
+  def change
+    create_table :fasp_base_invitation_codes do |t|
+      t.string :code, null: false, index: { unique: true }
+
+      t.timestamps
+    end
+  end
+end

debug_fasp/db/migrate/20250509081146_create_fasp_base_settings.fasp_base.rb

@@ -0,0 +1,16 @@
+# This migration comes from fasp_base (originally 20250508125745)
+class CreateFaspBaseSettings < ActiveRecord::Migration[8.0]
+  def up
+    create_table :fasp_base_settings do |t|
+      t.string :name, null: false, index: { unique: true }
+      t.string :value
+
+      t.timestamps
+    end
+    FaspBase::Setting.create!(name: "registration", value: "open")
+  end
+
+  def down
+    drop_table :fasp_base_settings
+  end
+end

debug_fasp/db/schema.rb

@@ -1,4 +1,35 @@
 module FaspBase
   class Admin::InvitationCodesController < Admin::BaseController
+    def index
+      @invitation_codes = FaspBase::InvitationCode.order(created_at: :desc)
+
+      respond_to do |format|
+        format.html
+        format.json { render json: @invitation_codes }
+      end
+    end
+
+    def create
+      @invitation_code = FaspBase::InvitationCode.create!
+
+      respond_to do |format|
+        format.html do
+          redirect_to fasp_base.admin_invitation_codes_path, notice: t(".success")
+        end
+        format.json { render json: @invitation_code, status: :created }
+      end
+    end
+
+    def destroy
+      invitation_code = FaspBase::InvitationCode.find(params[:id])
+      invitation_code.destroy
+
+      respond_to do |format|
+        format.html do
+          redirect_to fasp_base.admin_invitation_codes_path, notice: t(".success")
+        end
+        format.json { head :no_content }
+      end
+    end
   end
 end

fasp_base/app/controllers/fasp_base/admin/invitation_codes_controller.rb

@@ -19,7 +19,7 @@ def create
     def destroy
       reset_session
 
-      redirect_to fasp_base.admin_new_session_path,
+      redirect_to fasp_base.new_admin_session_path,
         notice: t(".success")
     end
   end

fasp_base/app/controllers/fasp_base/admin/sessions_controller.rb

@@ -1,4 +1,36 @@
 module FaspBase
   class Admin::SettingsController < Admin::BaseController
+    def index
+      @registration = find_or_create_registration
+
+      respond_to do |format|
+        format.html
+        format.json { render json: [ @registration ] }
+      end
+    end
+
+    def update
+      setting = Setting.find(params[:id])
+      setting.update!(setting_params)
+
+      respond_to do |format|
+        format.html do
+          redirect_to fasp_base.admin_settings_path, notice: t(".success")
+        end
+        format.json { head :no_content }
+      end
+    end
+
+    private
+
+    def find_or_create_registration
+      Setting
+        .create_with(value: "open")
+        .find_or_create_by(name: "registration")
+    end
+
+    def setting_params
+      params.expect(setting: [ :value ])
+    end
   end
 end

fasp_base/app/controllers/fasp_base/admin/settings_controller.rb

@@ -31,11 +31,11 @@ def create
 
     def registration_params
       params.require(:registration)
-        .permit(:email, :base_url, :password, :password_confirmation)
+        .permit(:email, :base_url, :password, :password_confirmation, :invitation_code)
     end
 
     def registration_allowed
-      head :not_found unless FaspBase.registration_enabled?
+      head :not_found if FaspBase::Setting.get("registration").closed?
     end
   end
 end