FIX: Show admin plugin route sub-links in sidebar (#24982)

This changes the Plugins link in the admin sidebar to
be a section instead, which then shows all enabled plugin
admin routes (which are custom routes some plugins e.g.
chat define).

This is done via adding some special preloaded data for
all controllers based on AdminController, and also specifically
on Admin::PluginsController, to have the routes loaded without
additional requests on page load.

We just use a cog for all the route icons for now...we don't
have anything better.

app/assets/javascripts/discourse/app/instance-initializers/admin-sidebar.js

@@ -1,3 +1,4 @@
+import PreloadStore from "discourse/lib/preload-store";
 import { ADMIN_NAV_MAP } from "discourse/lib/sidebar/admin-nav-map";
 import {
   addSidebarPanel,
@@ -137,13 +138,6 @@ export function useAdminNavConfig(navMap) {
           label: "admin.dashboard.reports_tab",
           icon: "chart-pie",
         },
-        {
-          name: "admin_plugins",
-          route: "adminPlugins",
-          label: "admin.plugins.title",
-          icon: "puzzle-piece",
-        },
-
         {
           name: "admin_badges",
           route: "adminBadges",
@@ -206,6 +200,17 @@ export default {
     const savedConfig = this.adminSidebarExperimentStateManager.navConfig;
     const navMap = savedConfig || ADMIN_NAV_MAP;
 
+    const enabledPluginAdminRoutes =
+      PreloadStore.get("enabledPluginAdminRoutes") || [];
+    enabledPluginAdminRoutes.forEach((pluginAdminRoute) => {
+      navMap.findBy("name", "admin_plugins").links.push({
+        name: `admin_plugin_${pluginAdminRoute.location}`,
+        route: `adminPlugins.${pluginAdminRoute.location}`,
+        label: pluginAdminRoute.label,
+        icon: "cog",
+      });
+    });
+
     if (this.siteSettings.experimental_form_templates) {
       navMap.findBy("name", "customize").links.push({
         name: "admin_customize_form_templates",
@@ -215,8 +220,6 @@ export default {
       });
     }
 
-    const navConfig = useAdminNavConfig(navMap);
-
-    buildAdminSidebar(navConfig, adminSectionLinkClass);
+    buildAdminSidebar(useAdminNavConfig(navMap), adminSectionLinkClass);
   },
 };

app/assets/javascripts/discourse/app/lib/sidebar/admin-nav-map.js

@@ -1,4 +1,17 @@
 export const ADMIN_NAV_MAP = [
+  {
+    name: "admin_plugins",
+    route: "adminPlugins.index",
+    label: "admin.plugins.title",
+    links: [
+      {
+        name: "admin_installed_plugins",
+        route: "adminPlugins",
+        label: "admin.plugins.installed",
+        icon: "puzzle-piece",
+      },
+    ],
+  },
   {
     name: "email",
     text: "Email",

app/controllers/admin/admin_controller.rb

@@ -7,4 +7,13 @@ class Admin::AdminController < ApplicationController
   def index
     render body: nil
   end
+
+  private
+
+  def preload_additional_json
+    store_preloaded(
+      "enabledPluginAdminRoutes",
+      MultiJson.dump(Discourse.plugins_sorted_by_name.filter_map(&:admin_route)),
+    )
+  end
 end

app/controllers/admin/plugins_controller.rb

@@ -3,9 +3,18 @@
 class Admin::PluginsController < Admin::StaffController
   def index
     render_serialized(
-      Discourse.visible_plugins.sort_by { |p| p.name.downcase.delete_prefix("discourse-") },
+      Discourse.plugins_sorted_by_name(enabled_only: false),
       AdminPluginSerializer,
       root: "plugins",
     )
   end
+
+  private
+
+  def preload_additional_json
+    store_preloaded(
+      "enabledPluginAdminRoutes",
+      MultiJson.dump(Discourse.plugins_sorted_by_name.filter_map(&:admin_route)),
+    )
+  end
 end

app/controllers/application_controller.rb

@@ -446,6 +446,8 @@ class ApplicationController < ActionController::Base
       current_user.sync_notification_channel_position
       preload_current_user_data
     end
+
+    preload_additional_json
   end
 
   def set_mobile_view
@@ -671,6 +673,10 @@ class ApplicationController < ActionController::Base
     store_preloaded("fontMap", MultiJson.dump(load_font_map)) if current_user.admin?
   end
 
+  def preload_additional_json
+    # noop, should be defined by subcontrollers
+  end
+
   def custom_html_json
     target = view_context.mobile_view? ? :mobile : :desktop
 

lib/discourse.rb

@@ -377,6 +377,11 @@ module Discourse
     plugins.filter(&:visible?)
   end
 
+  def self.plugins_sorted_by_name(enabled_only: true)
+    return visible_plugins.filter(&:enabled?).sort_by(&:name_without_prefix) if enabled_only
+    visible_plugins.sort_by(&:name_without_prefix)
+  end
+
   def self.plugin_themes
     @plugin_themes ||= plugins.map(&:themes).flatten
   end

lib/plugin/instance.rb

@@ -122,7 +122,7 @@ class Plugin::Instance
     @enabled_site_setting ? SiteSetting.get(@enabled_site_setting) : true
   end
 
-  delegate :name, to: :metadata
+  delegate :name, :name_without_prefix, to: :metadata
 
   def add_to_serializer(
     serializer,

lib/plugin/metadata.rb

@@ -133,6 +133,10 @@ class Plugin::Metadata
       end
   end
 
+  def name_without_prefix
+    name.downcase.delete_prefix("discourse-")
+  end
+
   def self.parse(text)
     metadata = self.new
     text.each_line { |line| break unless metadata.parse_line(line) }

plugins/chat/spec/system/admin_sidebar_navigation_spec.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+describe "Admin Revamp | Sidebar Navigation | Plugin Links", type: :system do
+  fab!(:admin)
+  let(:sidebar) { PageObjects::Components::NavigationMenu::Sidebar.new }
+
+  before do
+    chat_system_bootstrap
+    SiteSetting.enable_admin_sidebar_navigation = true
+    sign_in(admin)
+  end
+
+  it "shows links to enabled plugin admin routes" do
+    visit("/admin")
+    expect(sidebar).to have_section_link("Chat", href: "/admin/plugins/chat")
+  end
+end

spec/system/admin_revamp_sidebar_navigation_spec.rb

@@ -20,11 +20,14 @@ describe "Admin Revamp | Sidebar Navigation", type: :system do
     expect(sidebar).to have_no_section("admin-nav-section-root")
   end
 
-  it "does not show the admin sidebar if the setting is disabled" do
-    SiteSetting.enable_admin_sidebar_navigation = false
+  context "when the setting is disabled" do
+    before { SiteSetting.enable_admin_sidebar_navigation = false }
+
+    it "does not show the admin sidebar" do
       visit("/latest")
       sidebar.click_link_in_section("community", "admin")
       expect(page).to have_current_path("/admin")
       expect(sidebar).to have_no_section("admin-nav-section-root")
     end
   end
+end