Create an 'edit' popular links page

app/assets/stylesheets/application.scss

@@ -4,3 +4,4 @@ $govuk-page-width: 1140px;
 @import "govuk_publishing_components/all_components";
 @import "downtimes";
 @import "summary-card";
+@import "sidebar_components";

app/assets/stylesheets/sidebar_components.scss

@@ -0,0 +1,6 @@
+.sidebar-components {
+  .govuk-button {
+    width: 100%;
+  }
+  border-top: 2px solid $govuk-brand-colour;
+}

app/controllers/homepage_controller.rb

@@ -1,8 +1,54 @@
 class HomepageController < ApplicationController
   layout "design_system"
+  before_action :fetch_latest_popular_link
 
   def show
-    @latest_popular_links = PopularLinksEdition.last
     render "homepage/popular_links/show"
   end
+
+  def create
+    @latest_popular_links = @latest_popular_links.create_draft_popular_links_from_last_record
+    render "homepage/popular_links/show"
+  end
+
+  def edit
+    render "homepage/popular_links/edit"
+  end
+
+  def update
+    update_link_items
+    flash[:success] = "Popular links draft saved.".html_safe
+    redirect_to show_popular_links_path
+  rescue StandardError
+    render "homepage/popular_links/edit"
+  end
+
+  def publish
+    publish_latest_popular_links
+    render "homepage/popular_links/show"
+  end
+
+private
+
+  def fetch_latest_popular_link
+    @latest_popular_links = PopularLinksEdition.last
+  end
+
+  def update_link_items
+    @latest_popular_links.link_items = remove_leading_and_trailing_url_spaces(params[:popular_links].values)
+    @latest_popular_links.save!
+  end
+
+  def remove_leading_and_trailing_url_spaces(links)
+    link_items = []
+    links.each do |link|
+      link[:url] = link[:url].strip
+      link_items << link
+    end
+    link_items
+  end
+
+  def publish_latest_popular_links
+    @latest_popular_links.publish_popular_links
+  end
 end

app/helpers/errors_helper.rb

@@ -1,14 +1,14 @@
 module ErrorsHelper
-  def errors_for(errors, attribute)
+  def errors_for(errors, attribute, use_full_message: true)
     return nil if errors.blank?
 
     errors.filter_map { |error|
       if error.attribute == attribute
         {
-          text: error.full_message,
+          text: use_full_message ? error.full_message : error.message,
         }
       end
     }
-    .presence
+          .presence
   end
 end

app/helpers/popular_links_helper.rb

@@ -5,4 +5,31 @@ def popular_link_rows(item)
     rows << { key: "URL", value: item[:url] }
     rows.compact
   end
+
+  def primary_button_for(model, url, text)
+    form_for model, url:, method: :post do
+      render "govuk_publishing_components/components/button", {
+        text:,
+        margin_bottom: 3,
+      }
+    end
+  end
+
+  def secondary_button_for(model, url, text)
+    form_for model, url:, method: :post do
+      render "govuk_publishing_components/components/button", {
+        text:,
+        margin_bottom: 3,
+        secondary_solid: true,
+      }
+    end
+  end
+
+  def primary_link_button_for(url, text)
+    render "govuk_publishing_components/components/button", {
+      text:,
+      href: url,
+      margin_bottom: 3,
+    }
+  end
 end

app/models/action.rb

@@ -17,6 +17,7 @@ class Action
     PUBLISH                     = "publish".freeze,
     ARCHIVE                     = "archive".freeze,
     NEW_VERSION                 = "new_version".freeze,
+    PUBLISH_POPULAR_LINKS       = "publish_popular_links".freeze,
   ].freeze
 
   NON_STATUS_ACTIONS = [

app/models/edition.rb

@@ -121,7 +121,7 @@ class ResurrectionError < RuntimeError
   validates :version_number, presence: true, uniqueness: { scope: :panopticon_id }, unless: :popular_links_edition?
   validates :panopticon_id, presence: true, unless: :popular_links_edition?
   validates_with SafeHtml, unless: :popular_links_edition?
-  validates_with LinkValidator, on: :update, unless: :archived? || :popular_links_edition?
+  validates_with LinkValidator, on: :update, unless: :archived_or_popular_links?
   validates_with ReviewerValidator
   validates :change_note, presence: { if: :major_change }
 
@@ -519,4 +519,8 @@ def common_type_specific_field_keys(target_class)
   def popular_links_edition?
     instance_of?(::PopularLinksEdition)
   end
+
+  def archived_or_popular_links?
+    archived? || popular_links_edition?
+  end
 end

app/models/popular_links_edition.rb

@@ -1,16 +1,36 @@
 class PopularLinksEdition < Edition
   field :link_items, type: Array
-  validate :six_link_items_present?
-  validate :all_urls_and_titles_are_present?
+  validate :six_link_items_present
+  validate :all_valid_urls_and_titles_are_present
 
-  def six_link_items_present?
+  def six_link_items_present
     errors.add(:link_items, "6 links are required") if link_items.count != 6
   end
 
-  def all_urls_and_titles_are_present?
+  def all_valid_urls_and_titles_are_present
     link_items.each_with_index do |item, index|
-      errors.add(:item, "A URL is required for Link #{index + 1}") unless item.key?(:url)
-      errors.add(:item, "A Title is required for Link #{index + 1}") unless item.key?(:title)
+      errors.add("url#{index + 1}", "URL is required for Link #{index + 1}") unless url_present?(item)
+      errors.add("title#{index + 1}", "Title is required for Link #{index + 1}") unless title_present?(item)
+      errors.add("url#{index + 1}", "URL is invalid for Link #{index + 1}, all URLs should have at least one '.' and no spaces.") if url_present?(item) && url_has_spaces_or_has_no_dot?(item[:url])
     end
   end
+
+  def url_has_spaces_or_has_no_dot?(url)
+    url.include?(" ") || url.exclude?(".")
+  end
+
+  def title_present?(item)
+    item.key?(:title) && !item[:title].empty?
+  end
+
+  def url_present?(item)
+    item.key?(:url) && !item[:url].empty?
+  end
+
+  def create_draft_popular_links_from_last_record
+    last_popular_links = PopularLinksEdition.last
+    popular_links = PopularLinksEdition.new(title: last_popular_links.title, link_items: last_popular_links.link_items, version_number: last_popular_links.version_number.next)
+    popular_links.save!
+    popular_links
+  end
 end

app/models/workflow.rb

@@ -93,6 +93,10 @@ class CannotDeletePublishedPublication < RuntimeError; end
         transition all => :archived, :unless => :archived?
       end
 
+      event :publish_popular_links do
+        transition %i[draft] => :published
+      end
+
       state :in_review do
         validates :review_requested_at, presence: true
       end

app/views/homepage/popular_links/_form.html.erb

@@ -0,0 +1,25 @@
+<%= render "govuk_publishing_components/components/fieldset", {
+  legend_text: "Link #{index+1}",
+  heading_level: 2,
+  heading_size: "m",
+} do %>
+  <%= render "govuk_publishing_components/components/input", {
+    label: {
+      text: "Title",
+    },
+    name: "popular_links[#{index + 1}][title]",
+    id: "title#{index + 1}",
+    value: item[:title],
+    error_items: errors_for(form.object.errors, "title#{index + 1}".to_sym, use_full_message: false),
+  } %>
+
+  <%= render "govuk_publishing_components/components/input", {
+    label: {
+      text: "URL",
+    },
+    name: "popular_links[#{index + 1}][url]",
+    id: "url#{index + 1}",
+    value: item[:url],
+    error_items: errors_for(form.object.errors, "url#{index + 1}".to_sym, use_full_message: false),
+  } %>
+<% end %>

app/views/homepage/popular_links/_sidebar.html.erb

@@ -0,0 +1,13 @@
+<div class="sidebar-components">
+  <%= render "govuk_publishing_components/components/heading", {
+    text: "Options",
+    font_size: "s",
+    padding: true
+  } %>
+  <% if @latest_popular_links.state == "published" %>
+    <%= primary_button_for(@latest_popular_links, create_popular_links_path, "Create new edition") %>
+  <% else %>
+    <%= primary_link_button_for(edit_popular_links_path(@latest_popular_links), "Edit popular links") %>
+    <%= secondary_button_for(@latest_popular_links, publish_popular_links_path(@latest_popular_links), "Publish") %>
+  <% end %>
+</div>

app/views/homepage/popular_links/edit.html.erb

@@ -0,0 +1,32 @@
+<% content_for :page_title, 'Edit popular links' %>
+<% content_for :title, 'Edit popular links' %>
+<% content_for :title_context, 'Popular on GOV.UK' %>
+<% unless @latest_popular_links.errors.empty? %>
+  <% content_for :error_summary do %>
+    <%= render("govuk_publishing_components/components/error_summary", {
+      id: "error-summary",
+      title: "There is a problem",
+      items: @latest_popular_links.errors.map do |error|
+        {
+          text: error.message,
+          href: "##{error.attribute.to_s}",
+        }
+      end
+    }) %>
+  <% end %>
+<% end %>
+
+<div class="govuk-grid-column-two-thirds">
+  <%= form_for @latest_popular_links, url: update_popular_links_path(@latest_popular_links), method: "patch" do |form| %>
+    <% @latest_popular_links.link_items.each_with_index do |item, index| %>
+      <%= render "homepage/popular_links/form", item:, index:, form: %>
+    <% end %>
+    <div class="govuk-button-group">
+      <%= render("govuk_publishing_components/components/button", {
+        text: "Save",
+        type: "submit",
+      }) %>
+      <%= link_to("Cancel", show_popular_links_path, class: "govuk-link govuk-link--no-visited-state") %>
+    </div>
+  <% end %>
+</div>

app/views/homepage/popular_links/show.html.erb

@@ -7,3 +7,6 @@
     <%= render "homepage/popular_links/link", item:, index: %>
   <% end %>
 </div>
+<div class = "govuk-grid-column-one-third" >
+  <%= render "homepage/popular_links/sidebar" %>
+</div>

config/routes.rb

@@ -72,7 +72,11 @@
 
   get "/govuk-sitemap.xml" => "sitemap#index"
 
-  get "/homepage/popular-links" => "homepage#show"
+  get "/homepage/popular-links" => "homepage#show", as: "show_popular_links"
+  post "/homepage/popular-links/create" => "homepage#create", as: "create_popular_links"
+  get "/homepage/popular-links/:id" => "homepage#edit", as: "edit_popular_links"
+  patch "/homepage/popular-links/:id" => "homepage#update", as: "update_popular_links"
+  post "/homepage/popular-links/:id/publish" => "homepage#publish", as: "publish_popular_links"
 
   mount GovukAdminTemplate::Engine, at: "/style-guide"
   mount Flipflop::Engine => "/flipflop"

test/functional/homepage_controller_test.rb

@@ -17,4 +17,101 @@ class HomepageControllerTest < ActionController::TestCase
       assert_template "homepage/popular_links/show"
     end
   end
+
+  context "#create" do
+    setup do
+      @popular_links = FactoryBot.create(:popular_links, state: "published")
+    end
+
+    should "render show template" do
+      post :create, params: { id: @popular_links.id }
+
+      assert_response :ok
+      assert_template "homepage/popular_links/show"
+    end
+
+    should "create a new draft popular links" do
+      assert_equal 1, PopularLinksEdition.count
+      assert_equal "published", PopularLinksEdition.last.state
+
+      post :create, params: { id: @popular_links.id }
+
+      assert_equal 2, PopularLinksEdition.count
+      assert_equal "draft", PopularLinksEdition.last.state
+    end
+  end
+
+  context "#edit" do
+    should "render edit template" do
+      popular_links = FactoryBot.create(:popular_links, state: "published")
+
+      post :edit, params: { id: popular_links.id }
+
+      assert_response :ok
+      assert_template "homepage/popular_links/edit"
+    end
+  end
+
+  context "#update" do
+    setup do
+      @popular_links = FactoryBot.create(:popular_links, state: "draft")
+    end
+
+    should "update latest PopularLinksEdition with changed title and url" do
+      assert_equal "title1", @popular_links.link_items[0][:title]
+      assert_equal "https://www.url1.com", @popular_links.link_items[0][:url]
+
+      new_title = "title has changed"
+      new_url = "https://www.changedurl.com"
+      patch :update, params: { id: @popular_links.id,
+                               "popular_links" =>
+                                 { "1" => { "title" => new_title, "url" => new_url },
+                                   "2" => { "title" => "title2", "url" => "https://www.url2.com" },
+                                   "3" => { "title" => "title3", "url" => "https://www.url3.com" },
+                                   "4" => { "title" => "title4", "url" => "https://www.url4.com" },
+                                   "5" => { "title" => "title5", "url" => "https://www.url5.com" },
+                                   "6" => { "title" => "title6", "url" => "https://www.url6.com" } } }
+
+      assert_equal new_title, PopularLinksEdition.last.link_items[0][:title]
+      assert_equal new_url, PopularLinksEdition.last.link_items[0][:url]
+    end
+
+    should "redirect to show path on success" do
+      new_title = "title has changed"
+      patch :update, params: { id: @popular_links.id,
+                               "popular_links" =>
+                                 { "1" => { "title" => new_title, "url" => "https://www.url1.com" },
+                                   "2" => { "title" => "title2", "url" => "https://www.url2.com" },
+                                   "3" => { "title" => "title3", "url" => "https://www.url3.com" },
+                                   "4" => { "title" => "title4", "url" => "https://www.url4.com" },
+                                   "5" => { "title" => "title5", "url" => "https://www.url5.com" },
+                                   "6" => { "title" => "title6", "url" => "https://www.url6.com" } } }
+
+      assert_redirected_to show_popular_links_path
+    end
+
+    should "render edit template on errors" do
+      patch :update, params: { id: @popular_links.id,
+                               "popular_links" =>
+                                 { "1" => { "title" => "title has changed", "url" => "https://www.url1.com" } } }
+
+      assert_template "homepage/popular_links/edit"
+    end
+  end
+
+  context "#publish" do
+    setup do
+      @popular_links = FactoryBot.create(:popular_links, state: "draft")
+    end
+
+    should "publish latest draft popular links and render show template" do
+      assert_equal "draft", PopularLinksEdition.last.state
+
+      post :publish, params: { id: @popular_links.id }
+
+      assert_response :ok
+      assert_template "homepage/popular_links/show"
+      assert_equal "published", PopularLinksEdition.last.state
+    end
+  end
 end