Make default user services configurable by admin

app/controllers/admin/settings/registrations_controller.rb

@@ -9,4 +9,12 @@ class Admin::Settings::RegistrationsController < Admin::SettingsController
       success: "Settings saved"
     }
   end
+
+  private
+
+    def setting_params
+      params.require(:setting).permit([
+        :reserved_usernames, default_services: []
+      ])
+    end
 end

app/controllers/admin/settings_controller.rb

@@ -9,11 +9,12 @@ class Admin::SettingsController < Admin::BaseController
     changed_keys = []
 
     setting_params.keys.each do |key|
-      next if setting_params[key].nil? ||
-              (Setting.send(key).to_s == setting_params[key].strip)
+      next if clean_param(key).nil? ||
+        (Setting.send(key).to_s == clean_param(key))
+
       changed_keys.push(key)
       setting = Setting.new(var: key)
-      setting.value = setting_params[key].strip
+      setting.value = clean_param(key)
       unless setting.valid?
         @errors.merge!(setting.errors)
       end
@@ -24,7 +25,8 @@ class Admin::SettingsController < Admin::BaseController
     end
 
     changed_keys.each do |key|
-      Setting.send("#{key}=", setting_params[key].strip)
+
+      Setting.send("#{key}=", clean_param(key))
     end
   end
 
@@ -37,4 +39,12 @@ class Admin::SettingsController < Admin::BaseController
     def setting_params
       params.require(:setting).permit(Setting.editable_keys.map(&:to_sym))
     end
+
+    def clean_param(key)
+      if Setting.get_field(key)[:type] == :string
+        setting_params[key].strip!
+      else
+        setting_params[key]
+      end
+    end
 end

app/views/admin/settings/registrations/show.html.erb

@@ -9,18 +9,35 @@
         <%= render partial: "admin/settings/errors", locals: { errors: @errors } %>
       <% end %>
 
-      <label class="block">
-        <p class="font-bold mb-1">Reserved usernames</p>
-        <p class="text-gray-500">
-          These usernames cannot be registered as accounts:
-        </p>
+      <ul role="list">
+        <%= render FormElements::FieldsetComponent.new(
+              title: "Reserved usernames",
+              description: "These usernames cannot be registered as accounts."
+            ) do %>
           <%= f.text_area :reserved_usernames,
             value: Setting.reserved_usernames.join("\n"),
-          class: "h-44 mb-2" %>
+            class: "h-44 w-60" %>
           <p class="text-sm text-gray-500">
             One username per line
           </p>
-      </label>
+        <% end %>
+        <li>
+          <p class="font-bold mb-1">Default services</p>
+          <p class="text-gray-500">
+            These services are enabled for new users by default after signup.
+          </p>
+          <div class="flex flex-wrap gap-x-6 gap-y-2">
+            <% Setting.available_services.each do |option| %>
+              <div class="md:inline-block">
+                <%= f.check_box :default_services,
+                  { multiple: true, checked: Setting.default_services.include?(option) },
+                  option, nil %>
+                <%= f.label "default_services_#{option.parameterize}", service_human_name(option) %>
+              </div>
+            <% end %>
+          </div>
+        </li>
+      </ul>
     </section>
 
     <section>

spec/models/setting_spec.rb

@@ -8,14 +8,16 @@ RSpec.describe Setting, type: :model do
       Setting.ejabberd_enabled = true
       Setting.email_enabled = false
       Setting.gitea_enabled = false
+      Setting.lndhub_enabled = true
       Setting.mastodon_enabled = true
       Setting.mediawiki_enabled = false
+      Setting.nostr_enabled = false
       Setting.remotestorage_enabled = true
     end
 
     it "contains all enabled services" do
       expect(Setting.available_services).to eq(%w[
-        discourse ejabberd mastodon remotestorage
+        discourse ejabberd lndhub mastodon remotestorage
       ])
     end
   end