Add Lord Lieutenancy assigned filter to Lieutenancy office users page

app/search/lieutenant_search.rb

@@ -1,11 +1,43 @@
 class LieutenantSearch < Search
   DEFAULT_SEARCH = {
-    sort: "full_name"
+    sort: "full_name",
+    search_filter: {}
   }
 
   include FullNameSort
 
+  def filter_by_assigned_ceremonial_county(scoped_results, value)
+    value = value.map do |v|
+      v == "not_assigned" ? nil : v
+    end
+    scoped_results.where(ceremonial_county_id: value)
+  end
+
   def sort_by_ceremonial_county_name(scoped_results, desc = false)
     scoped_results.joins(:ceremonial_county).order("ceremonial_counties.name #{sort_order(desc)}")
   end
+
+  class << self
+    def ceremonial_county_options
+      collection_mapping(county_options)
+    end
+
+    private
+
+    def collection_mapping(options)
+      options.map do |k, v|
+        [v[:label], k]
+      end
+    end
+
+    def county_options
+      options = Hash[not_assigned: { label: "Not assigned" }]
+
+      CeremonialCounty.ordered.collect do |county|
+        options[county.id] = { label: county.name }
+      end
+
+      options
+    end
+  end
 end

app/views/admin/lieutenants/index.html.slim

@@ -0,0 +1,52 @@
+.dashboard
+  h1.govuk-heading-xl
+    | Users
+  = simple_form_for @search, url: "#", method: :get, as: :search, html: { class: "search-form" } do |f|
+    = render 'admin/users/navigation' do
+      .govuk-tabs__panel
+        .govuk-grid-row
+          p.govuk-body-l.govuk-grid-column-two-thirds class="govuk-!-font-weight-bold"
+            | Search Lieutenancy office users
+        .govuk-grid-row
+          .govuk-grid-column-one-third
+            .form-group.search-input
+              = f.input :query, label: "Name", input_html: { type: "search" }
+          .govuk-grid-column-two-third
+            .form-group.search-input
+              = f.simple_fields_for [:filters, @search.filters] do |g|
+                = render "shared/form_answers/filters/assigned_lieutenancy_filter", g: g, options: LieutenantSearch.ceremonial_county_options
+        .govuk-button-group
+          = f.submit "Search", class: 'govuk-button'
+          = link_to "Clear search",
+                    [:admin, controller_name.to_sym],
+                    class: "govuk-button govuk-button--secondary",
+                    role: "button",
+                    aria: { label: "Clear search" }
+        .govuk-grid-row
+          = render "shared/users/search_count"
+        .govuk-button-group
+          - if controller_name == "lieutenants"
+            - if action_name == "deleted"
+              = link_to "Show active users",
+                        admin_lieutenants_path,
+                        class: "new-user govuk-button pull-right",
+                        role: "button",
+                        aria: { label: "Show active users" }
+
+            - else
+              = link_to "Show deleted users",
+                        deleted_admin_lieutenants_path,
+                        class: "new-user govuk-button pull-right",
+                        role: "button",
+                        aria: { label: "Show deleted users" }
+
+          = link_to public_send("new_admin_#{controller_name.singularize}_path", search: params[:search], page: params[:page]), class: 'new-user govuk-button pull-right', role: 'button' do
+            = t("admin.users.new_button.#{controller_name}")
+        .clear
+
+        = render 'list', resources: @resources, f: f
+
+        .govuk-grid-row
+          .col-xs-12.text-right
+            = paginate @resources
+            .clear