Revert "Create a new page for displaying SSA diagrams"

app/assets/stylesheets/application.scss

@@ -19,7 +19,6 @@
 // Pages
 @import "downtime";
 @import "smart_answer_builder";
-@import "smart_answer_flowchart";
 
 // GOVUK Design System
 @import "govuk_publishing_components/all_components";

app/controllers/editions_controller.rb

@@ -235,13 +235,6 @@ def process_unpublish
     end
   end
 
-  def diagram
-    # [MT] TODO: What's the best way to handle requests for a diagram for a non-simple smart answer?
-    if @resource.format != "SimpleSmartAnswer"
-      render plain: "404 Not Found", status: :not_found
-    end
-  end
-
 protected
 
   def permitted_params(subtype: nil)

app/views/editions/show.html.erb

@@ -27,12 +27,6 @@
     <div class="tab-content add-top-margin">
         <div role="tabpanel" class="tab-pane <% if active_tab.name == 'edit'%>active<% end %>" id="edit">
           <div class="link-check-report col-md-4">
-            <% if @edition.class.to_s == "SimpleSmartAnswerEdition" %>
-              <p>
-                View the <%= link_to "flow diagram", diagram_edition_path(@edition) %>
-              </p>
-            <% end %>
-
             <%= render 'link_check_reports/link_check_report', edition: @edition, report: @edition.latest_link_check_report %>
 
             <% if @edition.class.to_s.in?(Edition::HAS_GOVSPEAK_FIELDS) %>

config/routes.rb

@@ -25,7 +25,6 @@
       get "tagging", to: "editions#linking"
       get "related_external_links", to: "editions#linking"
       get "unpublish"
-      get "diagram"
       post "duplicate"
       post "update_tagging"
       post "process_unpublish"

package.json

@@ -46,7 +46,6 @@
     "stylelint-config-gds": "^1.1.0"
   },
   "dependencies": {
-    "mermaid": "10.5.1",
     "paste-html-to-govspeak": "^0.4.0"
   },
   "resolutions": {

test/functional/editions_controller_test.rb

@@ -1032,32 +1032,6 @@ class EditionsControllerTest < ActionController::TestCase
       assert_response :success
       assert_not_nil assigns(:resource)
     end
-
-    should "render a link to the diagram when edition is a simple smart answer" do
-      simple_smart_answer_artefact = FactoryBot.create(
-        :artefact,
-        slug: "my-simple-smart-answer",
-        kind: "guide",
-        name: "test",
-        owning_app: "publisher",
-      )
-      simple_smart_answer = SimpleSmartAnswerEdition.create!(
-        title: "test ssa",
-        panopticon_id: simple_smart_answer_artefact.id,
-      )
-
-      get :show, params: { id: simple_smart_answer.id }
-
-      assert_select ".link-check-report p", { text: "View the flow diagram" } do
-        assert_select "a[href=?]", diagram_edition_path(simple_smart_answer).to_s,
-                      { count: 1, text: "flow diagram" }
-      end
-    end
-
-    should "not render a link to the diagram when edition is not a simple smart answer" do
-      get :show, params: { id: @guide.id }
-      assert_select "p", { count: 0, text: "View the flow diagram" }
-    end
   end
 
   context "#admin" do
@@ -1230,32 +1204,4 @@ class EditionsControllerTest < ActionController::TestCase
       assert_equal "Option One", question.options.first.label
     end
   end
-
-  context "#diagram" do
-    context "given a simple smart answer exists" do
-      setup do
-        @artefact = FactoryBot.create(:artefact, slug: "foo", name: "Foo", kind: "simple_smart_answer", owning_app: "publisher")
-        @edition = FactoryBot.create(:simple_smart_answer_edition, body: "blah", state: "draft", slug: "foo", panopticon_id: @artefact.id)
-        @edition.save!
-      end
-
-      should "render a diagram page for it" do
-        get :diagram, params: { id: @edition.id }
-
-        assert_response :success
-        assert_select "title", "Diagram for #{@edition.title} | GOV.UK Publisher"
-      end
-    end
-
-    context "given a non-simple smart answer exists" do
-      setup do
-        @welsh_guide = FactoryBot.create(:guide_edition, :welsh, :in_review)
-      end
-
-      should "return a 404" do
-        get :diagram, params: { id: @welsh_guide.id }
-        assert_response :not_found
-      end
-    end
-  end
 end