Permit configurable replacement of search tracking with client session storage

app/components/blacklight/search_context/client_applied_params_component.html.erb

@@ -0,0 +1,4 @@
+<div id="appliedParams" class="clearfix constraints-container">
+  <%= render 'start_over' %>
+  <%= link_to t('blacklight.back_to_search'), search_action_path(only_path: true), class: 'btn btn-outline-secondary back-to-catalog d-none', aria: { live: "off" } %>
+</div>

app/components/blacklight/search_context/client_applied_params_component.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module Blacklight
+  module SearchContext
+    class ClientAppliedParamsComponent < Blacklight::Component
+      delegate :search_action_path, to: :helpers
+      def render?
+        controller.params.permit(:counter)[:counter]
+      end
+    end
+  end
+end

app/components/blacklight/search_context/client_item_pagination_component.html.erb

@@ -0,0 +1,10 @@
+<div class='pagination-search-widgets'>
+
+  <div class="page-links d-none" data-page-links-url="<%= page_links_url %>" aria-live="polite">
+    <%= link_to_previous_document %> |
+
+    <%= item_page_entry_info %> |
+
+    <%= link_to_next_document %>
+  </div>
+</div>

app/components/blacklight/search_context/client_item_pagination_component.rb

@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+module Blacklight
+  module SearchContext
+    class ClientItemPaginationComponent < Blacklight::Component
+      delegate :search_action_path, to: :helpers
+
+      def initialize(counter:, **_args)
+        @counter = counter
+      end
+
+      def render?
+        @counter.present?
+      end
+
+      def page_links_url
+        search_action_path action: 'page_links', counter: @counter
+      end
+
+      ##
+      # Displays "showing X of Y items" message.
+      #
+      # @return [String]
+      def item_page_entry_info
+        # rubocop:disable Rails/OutputSafety
+        t('blacklight.search.entry_pagination_info.other', current: "<span class=\"pagination-counter-delimited\"></span>",
+                                                           total: "<span class=\"pagination-total-delimited\"></span>",
+                                                           count: "<span class=\"pagination-total-raw\"></span>").html_safe
+        # rubocop:enable Rails/OutputSafety
+      end
+
+      def link_to_previous_document(classes: 'previous', **link_opts)
+        # rubocop:disable Rails/OutputSafety
+        link_opts = { class: classes, rel: 'prev' }.merge(link_opts)
+        link_to '#', link_opts do
+          tag.span raw(t('views.pagination.previous')), class: 'previous'
+        end
+        # rubocop:enable Rails/OutputSafety
+      end
+
+      def link_to_next_document(classes: 'next', **link_opts)
+        # rubocop:disable Rails/OutputSafety
+        link_opts = { class: classes, rel: 'next' }.merge(link_opts)
+        link_to '#', link_opts do
+          tag.span raw(t('views.pagination.next')), class: 'next'
+        end
+        # rubocop:enable Rails/OutputSafety
+      end
+    end
+  end
+end

spec/components/blacklight/search_context/client_applied_params_component_spec.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Blacklight::SearchContext::ClientAppliedParamsComponent, type: :component do
+  subject(:render) { instance.render_in(view_context) }
+
+  let(:instance) { described_class.new }
+  let(:view_context) { controller.view_context }
+
+  before do
+    view_context.view_paths.unshift(RSpec::Rails::ViewExampleGroup::StubResolverCache.resolver_for('application/_start_over.html.erb' => 'start over'))
+    allow(view_context).to receive(:link_back_to_catalog).with(any_args)
+  end
+
+  it 'is blank without counter param' do
+    expect(render).to be_blank
+  end
+
+  context 'with counter param' do
+    before do
+      controller.params[:counter] = 1
+    end
+
+    it 'is not blank' do
+      expect(render).not_to be_blank
+    end
+  end
+end

spec/components/blacklight/search_context/client_item_pagination_component_spec.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Blacklight::SearchContext::ClientItemPaginationComponent, type: :component do
+  subject(:render) { instance.render_in(view_context) }
+
+  let(:rendered) do
+    Capybara::Node::Simple.new(render)
+  end
+
+  let(:counter) { nil }
+  let(:instance) { described_class.new(counter: counter) }
+  let(:view_context) { controller.view_context }
+
+  before do
+    view_context.view_paths.unshift(RSpec::Rails::ViewExampleGroup::StubResolverCache.resolver_for('application/_start_over.html.erb' => 'start over'))
+    allow(view_context).to receive(:link_back_to_catalog).with(any_args)
+  end
+
+  it 'is blank without counter param' do
+    expect(render).to be_blank
+  end
+
+  context 'with counter param' do
+    let(:counter) { 1 }
+
+    it 'is not blank' do
+      expect(render).not_to be_blank
+    end
+
+    it 'has spans that will be populated dynamically by the client' do
+      expect(rendered).to have_selector 'span[class="pagination-counter-delimited"]'
+      expect(rendered).to have_selector 'span[class="pagination-total-delimited"]'
+    end
+  end
+end