Make issuable empty state actionable

As per https://gitlab.com/gitlab-org/gitlab-ce/issues/25043, we want
to make the empty state for issuables a little friendly. This applies
during searching in opened state and in the closed state.

app/views/shared/empty_states/_issues.html.haml

@@ -2,6 +2,10 @@
 - project_select_button = local_assigns.fetch(:project_select_button, false)
 - show_import_button = local_assigns.fetch(:show_import_button, false) && Feature.enabled?(:issues_import_csv) && can?(current_user, :import_issues, @project)
 - has_button = button_path || project_select_button
+- closed_issues_count = issuables_count_for_state(:issues, :closed)
+- opened_issues_count = issuables_count_for_state(:issues, :opened)
+- is_opened_state = params[:state] == 'opened'
+- is_closed_state = params[:state] == 'closed'
 
 .row.empty-state
   .col-12
@@ -14,6 +18,20 @@
           = _("Sorry, your filter produced no results")
         %p.text-center
           = _("To widen your search, change or remove filters above")
+        - if show_new_issue_link?(@project)
+          .text-center
+            = link_to _("New issue"), new_project_issue_path(@project), class: "btn btn-success", title: _("New issue"), id: "new_issue_body_link"
+      - elsif is_opened_state && opened_issues_count == 0 && closed_issues_count > 0
+        %h4.text-center
+          = _("There are no open issues")
+        %p.text-center
+          = _("To keep this project going, create a new issue")
+        - if show_new_issue_link?(@project)
+          .text-center
+            = link_to _("New issue"), new_project_issue_path(@project), class: "btn btn-success", title: _("New issue"), id: "new_issue_body_link"
+      - elsif is_closed_state && opened_issues_count > 0 && closed_issues_count == 0
+        %h4.text-center
+          = _("There are no closed issues")
       - elsif current_user
         %h4
           = _("The Issue Tracker is the place to add things that need to be improved or solved in a project")

app/views/shared/empty_states/_merge_requests.html.haml

 - button_path = local_assigns.fetch(:button_path, false)
 - project_select_button = local_assigns.fetch(:project_select_button, false)
 - has_button = button_path || project_select_button
+- closed_merged_count = issuables_count_for_state(:merged, :closed)
+- opened_merged_count = issuables_count_for_state(:merged, :opened)
+- is_opened_state = params[:state] == 'opened'
+- is_closed_state = params[:state] == 'closed'
+- can_create_merge_request = merge_request_source_project_for_project(@project)
 
 .row.empty-state.merge-requests
   .col-12
@@ -13,6 +18,20 @@
           = _("Sorry, your filter produced no results")
         %p.text-center
           = _("To widen your search, change or remove filters above")
+        .text-center
+          - if can_create_merge_request
+            = link_to _("New merge request"), project_new_merge_request_path(@project), class: "btn btn-success", title: _("New merge request"), id: "new_merge_request_body_link"
+      - elsif is_opened_state && opened_merged_count == 0 && closed_merged_count > 0
+        %h4.text-center
+          = _("There are no open merge requests")
+        %p.text-center
+          = _("To keep this project going, create a new merge request")
+        .text-center
+          - if can_create_merge_request
+            = link_to _("New merge request"), project_new_merge_request_path(@project), class: "btn btn-success", title: _("New merge request"), id: "new_merge_request_body_link"
+      - elsif is_closed_state && opened_merged_count > 0 && closed_merged_count == 0
+        %h4.text-center
+          = _("There are no closed merge requests")
       - else
         %h4
           = _("Merge requests are a place to propose changes you've made to a project and discuss those changes with others")

changelogs/unreleased/25043-empty-states.yml

+---
+title: Make issuable empty states actionable
+merge_request: 24077
+author:
+type: changed

locale/gitlab.pot

@@ -6764,12 +6764,24 @@ msgstr ""
 msgid "There are no archived projects yet"
 msgstr ""
 
+msgid "There are no closed issues"
+msgstr ""
+
+msgid "There are no closed merge requests"
+msgstr ""
+
 msgid "There are no issues to show"
 msgstr ""
 
 msgid "There are no labels yet"
 msgstr ""
 
+msgid "There are no open issues"
+msgstr ""
+
+msgid "There are no open merge requests"
+msgstr ""
+
 msgid "There are no projects shared with this group yet"
 msgstr ""
 
@@ -7194,6 +7206,12 @@ msgstr ""
 msgid "To import an SVN repository, check out %{svn_link}."
 msgstr ""
 
+msgid "To keep this project going, create a new issue"
+msgstr ""
+
+msgid "To keep this project going, create a new merge request"
+msgstr ""
+
 msgid "To link Sentry to GitLab, enter your Sentry URL and Auth Token."
 msgstr ""
 

spec/features/groups/empty_states_spec.rb

@@ -23,14 +23,52 @@ describe 'Group empty states' do
         end
 
         context "the project has #{issuable_name}s" do
-          before do
+          it 'does not display an empty state' do
             create(issuable, project_relation => project)
 
             visit path
+            expect(page).not_to have_selector('.empty-state')
           end
 
-          it 'does not display an empty state' do
-            expect(page).not_to have_selector('.empty-state')
+          it "displays link to create new #{issuable} when no open #{issuable} is found" do
+            create("closed_#{issuable}", project_relation => project)
+            issuable_link_fn = "project_#{issuable}s_path"
+
+            visit public_send(issuable_link_fn, project)
+
+            page.within(find('.empty-state')) do
+              expect(page).to have_content(/There are no open #{issuable.to_s.humanize.downcase}/)
+              expect(page).to have_selector("#new_#{issuable}_body_link")
+            end
+          end
+
+          it 'displays link to create new issue when the current search gave no results' do
+            create(issuable, project_relation => project)
+
+            issuable_link_fn = "project_#{issuable}s_path"
+
+            visit public_send(issuable_link_fn, project, author_username: 'foo', scope: 'all', state: 'opened')
+
+            page.within(find('.empty-state')) do
+              expect(page).to have_content(/Sorry, your filter produced no results/)
+              new_issuable_path = issuable == :issue ? 'new_project_issue_path' : 'project_new_merge_request_path'
+
+              path = public_send(new_issuable_path, project)
+
+              expect(page).to have_selector("#new_#{issuable}_body_link[href='#{path}']")
+            end
+          end
+
+          it "displays conditional text when no closed #{issuable} is found" do
+            create(issuable, project_relation => project)
+
+            issuable_link_fn = "project_#{issuable}s_path"
+
+            visit public_send(issuable_link_fn, project, state: 'closed')
+
+            page.within(find('.empty-state')) do
+              expect(page).to have_content(/There are no closed #{issuable.to_s.humanize.downcase}/)
+            end
           end
         end