Show issue types in dropdown only if allowed

app/helpers/issues_helper.rb

 # frozen_string_literal: true
 
 module IssuesHelper
+  include Issues::IssueTypeHelpers
+
   def issue_css_classes(issue)
     classes = ["issue"]
     classes << "closed" if issue.closed?

app/views/shared/issuable/form/_type_selector.html.haml

@@ -18,17 +18,19 @@
                 = sprite_icon('close', size: 16, css_class: 'dropdown-menu-close-icon')
             .dropdown-content{ data: { testid: 'issue-type-select-dropdown' } }
               %ul
-                %li.js-filter-issuable-type
-                  = link_to new_project_issue_path(@project), class: ("is-active" if issuable.issue?) do
-                    #{sprite_icon(work_item_type_icon(:issue), css_class: 'gl-icon')} #{_("Issue")}
-                %li.js-filter-issuable-type{ data: { track: { action: "select_issue_type_incident", label: "select_issue_type_incident_dropdown_option" } } }
-                  = link_to new_project_issue_path(@project, { issuable_template: 'incident', issue: { issue_type: 'incident' } }), class: ("is-active" if issuable.incident?) do
-                    #{sprite_icon(work_item_type_icon(:incident), css_class: 'gl-icon')} #{_("Incident")}
+                - if create_issue_type_allowed?(@project, :issue)
+                  %li.js-filter-issuable-type
+                    = link_to new_project_issue_path(@project), class: ("is-active" if issuable.issue?) do
+                      #{sprite_icon(work_item_type_icon(:issue), css_class: 'gl-icon')} #{_('Issue')}
+                - if create_issue_type_allowed?(@project, :incident)
+                  %li.js-filter-issuable-type{ data: { track: { action: "select_issue_type_incident", label: "select_issue_type_incident_dropdown_option" } } }
+                    = link_to new_project_issue_path(@project, { issuable_template: 'incident', issue: { issue_type: 'incident' } }), class: ("is-active" if issuable.incident?) do
+                      #{sprite_icon(work_item_type_icon(:incident), css_class: 'gl-icon')} #{_('Incident')}
 
       #js-type-popover
 
     - if issuable.incident?
       %p.form-text.text-muted
         - incident_docs_url = help_page_path('operations/incident_management/incidents.md')
-        - incident_docs_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: incident_docs_url }
-        = _('A %{incident_docs_start}modified issue%{incident_docs_end} to guide the resolution of incidents.').html_safe % { incident_docs_start: incident_docs_start, incident_docs_end: '</a>'.html_safe }
+        - incident_docs_start = format('<a href="%{url}" target="_blank" rel="noopener noreferrer">', url: incident_docs_url)
+        = format(_('A %{incident_docs_start}modified issue%{incident_docs_end} to guide the resolution of incidents.'), incident_docs_start: incident_docs_start, incident_docs_end: '</a>').html_safe