Permitir cambiar carrera de un usuario con FeatureFlag

app/controllers/users/degrees_controller.rb

@@ -0,0 +1,24 @@
+module Users
+  class DegreesController < ApplicationController
+    before_action :authenticate_user!
+    before_action :ensure_feature_enabled!
+
+    def edit; end
+
+    def update
+      current_user.degree = Degree.find(params[:degree_id])
+
+      if current_user.save
+        redirect_to root_path, notice: "Tu carrera ha sido actualizada correctamente."
+      else
+        redirect_to edit_user_degree_path, alert: "Hubo un error actualizando tu carrera."
+      end
+    end
+
+    private
+
+    def ensure_feature_enabled!
+      redirect_to root_path unless Features::ChangingDegrees.enabled?
+    end
+  end
+end

app/models/user.rb

@@ -45,7 +45,7 @@ def planned?(subject)
   private
 
   def set_default_degree
-    self.degree = Degree.default
+    self.degree ||= Degree.default
   end
 end
 

app/services/features/changing_degrees.rb

@@ -0,0 +1,9 @@
+module Features
+  module ChangingDegrees
+    module_function
+
+    def enabled?
+      ENV['ENABLE_CHANGING_DEGREES'].present?
+    end
+  end
+end

app/views/shared/_user_menu.html.erb

@@ -13,6 +13,9 @@
       <li class="border-t border-gray-100 my-1"></li>
       <%= link_to "Editar Perfil", edit_user_registration_path, class: "block px-4 py-2 hover:bg-gray-100", tabindex: 0 %>
       <%= link_to "Subir Escolaridad", new_transcript_path, class: "block px-4 py-2 hover:bg-gray-100", tabindex: 0 %>
+      <% if Features::ChangingDegrees.enabled? %>
+        <%= link_to "Cambiar Carrera", edit_user_degree_path(current_user), class: "block px-4 py-2 hover:bg-gray-100", tabindex: 0 %>
+      <% end %>
       <%= link_to "Salir", destroy_user_session_path, data: { turbo: true, turbo_method: :delete }, class: "block px-4 py-2 hover:bg-gray-100", tabindex: 0 %>
     <% end %>
   </ul>

app/views/users/degrees/edit.html.erb

@@ -0,0 +1,36 @@
+<div class="flex flex-col justify-center items-center p-6 space-y-6">
+  <h2 class="text-3xl/9 text-neutral-700">Cambiar Carrera</h2>
+
+  <%= form_with(url: user_degree_path(current_user), method: :put, class: "flex flex-col w-full max-w-md space-y-6") do |f| %>
+    <div>
+      <%= f.label :degree_id, "Carrera de Grado", class: "text-sm/6 font-medium text-gray-700 with-error:text-red-600" %>
+      <%= f.select(
+        :degree_id,
+        options_for_select(
+          Degree.ids.map { |id| [id.humanize, id] },
+          selected: current_user.degree_id
+        ),
+        {
+          include_blank: "Selecciona tu carrera de grado",
+        },
+        {
+          class: %w[
+              bg-white
+              w-full
+              rounded-md
+              px-3
+              py-1.5
+              outline-1
+              outline-gray-300
+              focus:outline-2
+              focus:outline-indigo-600
+              with-error:outline-red-500
+              with-error:focus:outline-red-600
+          ].join(" "),
+          required: true
+        },
+      ) %>
+    </div>
+    <%= render ButtonComponent.new(form: f, label: "Guardar") %>
+  <% end %>
+</div>

config/routes.rb

@@ -19,6 +19,7 @@
 
     scope path: "usuarios", module: "users", as: "user" do
       resources :passkeys, only: [:index, :create, :destroy]
+      resources :degrees, only: [:update, :edit]
     end
 
     root to: "subjects#index"

spec/services/features/changing_degrees_spec.rb

@@ -0,0 +1,21 @@
+require 'rails_helper'
+
+RSpec.describe Features::ChangingDegrees do
+  describe '.enabled?' do
+    after do
+      ENV.delete('ENABLE_CHANGING_DEGREES')
+    end
+
+    it 'returns true when the ENABLE_CHANGING_DEGREES env var is set' do
+      ENV['ENABLE_CHANGING_DEGREES'] = 'true'
+
+      expect(described_class.enabled?).to be true
+    end
+
+    it 'returns false when the ENABLE_CHANGING_DEGREES env var is not set' do
+      ENV['ENABLE_CHANGING_DEGREES'] = nil
+
+      expect(described_class.enabled?).to be false
+    end
+  end
+end

spec/system/changing_degrees_spec.rb

@@ -0,0 +1,75 @@
+require 'rails_helper'
+
+RSpec.describe 'Changing degrees', type: :system do
+  let!(:computacion_degree) { degrees(:computacion) }
+  let!(:sistemas_degree) { create(:degree, id: 'sistemas', current_plan: '2025', include_inco_subjects: false) }
+  let!(:user) { create(:user, degree: computacion_degree) }
+
+  before do
+    sign_in user
+  end
+
+  context 'when feature is enabled' do
+    before do
+      allow(Features::ChangingDegrees).to receive(:enabled?).and_return(true)
+    end
+
+    it 'allows user to change their degree successfully' do
+      visit root_path
+
+      click_user_menu
+      click_on 'Cambiar Carrera'
+
+      expect(page).to have_text('Cambiar Carrera')
+      expect(page).to have_select('degree_id', selected: 'Computacion')
+
+      select 'Sistemas', from: 'degree_id'
+      click_on 'Guardar'
+
+      expect(page).to have_text('Tu carrera ha sido actualizada correctamente.')
+      expect(current_path).to eq(root_path)
+
+      user.reload
+      expect(user.degree_id).to eq('sistemas')
+    end
+  end
+
+  context 'when feature is disabled' do
+    before do
+      allow(Features::ChangingDegrees).to receive(:enabled?).and_return(false)
+    end
+
+    it 'does not show the change degree link in user menu' do
+      visit root_path
+
+      click_user_menu
+
+      expect(page).not_to have_link('Cambiar Carrera')
+    end
+
+    it 'redirects to root path when trying to access edit page directly' do
+      visit edit_user_degree_path(user)
+
+      expect(current_path).to eq(root_path)
+    end
+  end
+
+  context 'when user is not authenticated' do
+    before do
+      allow(Features::ChangingDegrees).to receive(:enabled?).and_return(true)
+      sign_out :user
+    end
+
+    it 'redirects to login page when accessing edit page' do
+      visit edit_user_degree_path(user)
+
+      expect(current_path).to eq(new_user_session_path)
+    end
+  end
+
+  private
+
+  def click_user_menu
+    find("#user-menu[data-controller-connected='true']").click
+  end
+end