<% if current_user.assignments.include?(assignment) %> <%= link_to new_assignment_submission_url(assignment), class: 'btn btn-primary' do %> <%= fa_icon 'file', text: "New Submission" %> <% end %> <% elsif assignment.course.users.merge(CourseParticipation.teachers).include?(current_user) %> <%= link_to assignment_submissions_url(assignment), class: 'btn btn-primary' do %> <%= fa_icon 'list', text: "View Submissions" %> <% end %> <% end %>