UI init

app/controllers/case_logs_controller.rb

@@ -126,7 +126,7 @@ private
     if session[:case_logs_filters].present?
       filters = JSON.parse(session[:case_logs_filters])
       filters.each do |category, values|
-        next if values.reject(&:empty?).blank?
+        next if Array(values).reject(&:empty?).blank?
 
         query = query.public_send("filter_by_#{category}", values, current_user)
       end

app/helpers/filters_helper.rb

@@ -14,4 +14,10 @@ module FiltersHelper
     CaseLog.statuses.keys.map { |status| statuses[status] = status.humanize }
     statuses
   end
+
+  def selected_option(filter)
+    return false unless session[:case_logs_filters]
+
+    JSON.parse(session[:case_logs_filters])[filter]
+  end
 end

app/views/case_logs/_log_filters.erb

@@ -11,7 +11,15 @@
         <%= render partial: "filters/checkbox_filter", locals: { f: f, options: status_filters, label: "Status", category: "status" } %>
         <%= render partial: "filters/radio_filter", locals: { f: f, options: all_or_yours, label: "Logs", category: "user", } %>
         <% if @current_user.support? %>
-          <%= render partial: "filters/checkbox_filter", locals: { f: f, options: {"all": "All", "yours": "Yours"}, label: "Organisation", category: "organisation" } %>
+          <%= render partial: "filters/radio_filter", locals: {
+            f: f,
+            options: {
+              "all": { label: "All" },
+              "specific_org": { label: "Specific organisation", conditional_filter: { type: "select", label: "Organisation", category: "organisation" } }
+            },
+            label: "Organisation",
+            category: "organisation"
+          } %>
         <% end %>
         <%= f.govuk_submit "Apply filters", class: "govuk-!-margin-bottom-0" %>
       <% end %>

app/views/filters/_radio_filter.html.erb

@@ -1,8 +1,17 @@
 <%= f.govuk_radio_buttons_fieldset category.to_sym, legend: { text: label, size: "s" }, small: true, form_group: { classes: "app-filter__group" } do %>
-    <% options.map do |key, option| %>
-        <%= f.govuk_radio_button category, key.to_s,
-        label: { text: option },
-        checked: filter_selected?(category, key),
-        size: "s" %>
+  <% options.map do |key, option| %>
+    <%= f.govuk_radio_button category, key.to_s,
+      label: { text: option },
+      checked: filter_selected?(category, key),
+      size: "s"
+    %>
+    <% if option[:conditional_filter] %>
+      <%= render partial: "filters/#{option[:conditional_filter][:type]}_filter", locals: {
+        f: f,
+        collection: Organisation.all,
+        category: "organisation",
+        secondary: true
+      } %>
     <% end %>
+  <% end %>
 <% end %>

app/views/filters/_select_filter.html.erb

@@ -0,0 +1,7 @@
+<%= f.govuk_collection_select category.to_sym,
+    collection,
+    :id,
+    :name,
+    label: { hidden: secondary },
+    options: { disabled: [""], selected: selected_option(category) },
+    "data-controller": "accessible-autocomplete" %>

spec/requests/case_logs_controller_spec.rb

@@ -186,6 +186,7 @@ RSpec.describe CaseLogsController, type: :request do
 
         context "when filtering" do
           context "with status filter" do
+            let(:organisation_2) { FactoryBot.create(:organisation) }
             let!(:in_progress_case_log) do
               FactoryBot.create(:case_log, :in_progress,
                                 owning_organisation: organisation,
@@ -193,7 +194,7 @@ RSpec.describe CaseLogsController, type: :request do
             end
             let!(:completed_case_log) do
               FactoryBot.create(:case_log, :completed,
-                                owning_organisation: organisation,
+                                owning_organisation: organisation_2,
                                 managing_organisation: organisation)
             end
 
@@ -209,6 +210,12 @@ RSpec.describe CaseLogsController, type: :request do
               expect(page).not_to have_link(completed_case_log.id.to_s)
             end
 
+            it "filters on organisation" do
+              get "/logs?organisation[]=#{organisation_2.id}", headers: headers, params: {}
+              expect(page).to have_link(completed_case_log.id.to_s)
+              expect(page).not_to have_link(in_progress_case_log.id.to_s)
+            end
+
             it "does not reset the filters" do
               get "/logs?status[]=in_progress", headers: headers, params: {}
               expect(page).to have_link(in_progress_case_log.id.to_s)