Automatically filter on courses for which you can register when relevant

app/controllers/courses_controller.rb

@@ -16,6 +16,10 @@ class CoursesController < ApplicationController
     scope.by_course_labels(value, controller.params[:id])
   end
 
+  has_scope :can_register, type: :boolean, only: :index do |controller, scope|
+    scope.can_register(controller.current_user)
+  end
+
   has_scope :order_by, using: %i[column direction], only: :scoresheet, type: :hash do |controller, scope, value|
     column, direction = value
     if %w[ASC DESC].include?(direction)
@@ -63,6 +67,7 @@ def index
     end
 
     @courses = @courses.paginate(page: parse_pagination_param(params[:page]))
+    @membership_status = current_user&.course_memberships&.where(course_id: @courses.pluck(:id))&.map { |c| [c.course_id, c.status] }&.to_h || {}
     @repository = Repository.find(params[:repository_id]) if params[:repository_id]
     @institution = Institution.find(params[:institution_id]) if params[:institution_id]
     @copy_courses = params[:copy_courses]

app/models/course.rb

@@ -161,6 +161,16 @@ class Course < ApplicationRecord
   scope :by_name, ->(name) { where('name LIKE ?', "%#{name}%") }
   scope :by_teacher, ->(teacher) { where('teacher LIKE ?', "%#{teacher}%") }
   scope :by_institution, ->(institution) { where(institution: institution) }
+  scope :can_register, lambda { |user|
+    if user&.institutional?
+      where(registration: %i[open_for_all open_for_institutional_users])
+        .or(where(registration: :open_for_institution, institution_id: user.institution_id))
+        .or(where(id: user.subscribed_courses.pluck(:id)))
+    else
+      where(registration: :open_for_all)
+        .or(where(id: user&.subscribed_courses&.pluck(:id)))
+    end
+  }
   default_scope { order(year: :desc, name: :asc) }
 
   token_generator :secret, unique: false, length: 5

app/views/courses/_courses_table.html.erb

@@ -16,8 +16,14 @@
     <% courses.each do |course| %>
       <tr>
         <td>
-          <% if current_user&.admin_of?(course) %>
+          <% if @membership_status[course.id] == 'course_admin' %>
             <span title='<%= t "pages.course_card.course-admin" %>'><i class='mdi mdi-school'></i></span>
+          <% elsif @membership_status[course.id] == 'student' %>
+            <span title='<%= t "courses.registration.already_a_member" %>'><i class='mdi mdi-account-check-outline'></i></span>
+          <% elsif @membership_status[course.id] == 'pending' %>
+            <span title='<%= t "courses.registration.pending" %>'><i class='mdi mdi-account-clock-outline'></i></span>
+          <% elsif current_user.present? && !course.open_for_user?(current_user) %>
+            <span title='<%= t("courses.show.registration-#{course.registration}-info", institution: course.institution&.name) %>'><i class='mdi mdi-account-remove-outline'></i></span>
           <% end %>
           <% if course.featured %>
             <span title='<%= Course.human_attribute_name("featured") %>'><i class='mdi mdi-star-outline'></i></span>

app/views/courses/index.html.erb

@@ -29,7 +29,7 @@
             <% end %>
           </ul>
         </div>
-        <%= render partial: 'layouts/searchbar', locals: {institutions: Institution.all, eager: false, no_dropdown_for: ["institutions"] } %>
+        <%= render partial: 'layouts/searchbar', locals: {institutions: Institution.all, eager: false, no_dropdown_for: ["institutions"], actions: [{search: {can_register: true}, type: 'can-register', text: "#{t(".only_show_can_register")}"}]  } %>
         <div id="courses-table-wrapper"></div>
       </div>
     </div>

app/views/pages/_getting_started_card.html.erb

@@ -6,7 +6,7 @@
     <div class="card-title col-6">
       <h1 class="card-title-text getting-started-title"><%= t ".title" %></h1>
       <p class="getting-started-text"><%= t ".text" %></p>
-      <%= link_to t(".action"), courses_path, class: "btn btn-text getting-started-action" %>
+      <%= link_to t(".action"), courses_path(:can_register => :true), class: "btn btn-text getting-started-action" %>
     </div>
   </div>
 </div>

app/views/pages/home.html.erb

@@ -51,7 +51,7 @@
         <% end %>
         <div class="card home-summary-card">
           <div class="card-supporting-text">
-            <%= link_to (t('.more-courses') + ' …'), courses_path, class: "btn btn-text" %>
+            <%= link_to (t('.more-courses') + ' …'), courses_path(:can_register => :true), class: "btn btn-text" %>
           </div>
         </div>
       </div>

config/locales/views/courses/en.yml

@@ -61,6 +61,7 @@ en:
       featured_courses: Featured courses
       all_courses: "All courses"
       my_courses: "My courses"
+      only_show_can_register: "Only show courses for which you can register"
     new:
       title: Create course
       empty: "Empty course"

config/locales/views/courses/nl.yml

@@ -61,6 +61,7 @@ nl:
       featured_courses: Uitgelichte cursussen
       all_courses: "Alle cursussen"
       my_courses: "Mijn cursussen"
+      only_show_can_register: "Toon enkel cursusen waarvoor je kan registreren"
     new:
       title: Cursus aanmaken
       empty: "Lege cursus"

test/models/course_test.rb

@@ -259,4 +259,31 @@ class CourseTest < ActiveSupport::TestCase
     course.usable_repositories << ex.repository
     assert course.all_activities_accessible?
   end
+
+  test 'can_register scope should always contain own courses' do
+    i = create :institution
+    [create(:institution), i, nil].each do |institution|
+      u = create :user, institution: institution
+      CourseMembership.statuses.each do |s|
+        Course.registrations.each do |r|
+          c = create :course, registration: r[1], institution: i
+          CourseMembership.create user: u, course: c, status: s[1]
+        end
+      end
+      assert_equal u.subscribed_courses.count, u.subscribed_courses.can_register(u).count
+    end
+  end
+
+  test 'can_register should only return course if the user can register for it' do
+    i = create :institution
+    Course.registrations.each do |r|
+      create :course, registration: r[1], institution: i
+    end
+    [create(:institution), i, nil].each do |institution|
+      u = create :user, institution: institution
+      Course.all.each do |c|
+        assert_equal c.open_for_user?(u), Course.can_register(u).exists?(c.id)
+      end
+    end
+  end
 end