Fixes #38072 - add host bootc_images endpoint

app/controllers/katello/api/v2/host_bootc_images_controller.rb

@@ -0,0 +1,48 @@
+module Katello
+  class Api::V2::HostBootcImagesController < Api::V2::ApiController
+    include Katello::Concerns::FilteredAutoCompleteSearch
+
+    resource_description do
+      api_version 'v2'
+      api_base_url "/api"
+    end
+
+    api :GET, "/hosts/bootc_images", N_("List booted bootc container images for hosts")
+    param :page, :number, :desc => N_("Page number, starting at 1")
+    param :per_page, :number, :desc => N_("Number of results per page to return")
+    def bootc_images
+      bootc_image_map = bootc_host_image_map(params[:search])
+
+      page = params[:page].to_i || 1
+      per_page = params[:per_page].to_i || Setting[:entries_per_page]
+      paged_images = bootc_image_map.to_a.paginate(page: page, per_page: per_page)
+      results = paged_images.collect { |image| { image_name: image[0], digests: image[1] } }
+      render json: { total: bootc_image_map.size, page: page, per_page: per_page, subtotal: bootc_image_map.size, results: results}
+    end
+
+    private
+
+    def index_relation
+      query = resource_class.authorized(:view_hosts).distinct
+      query.joins(:content_facet).where.not(bootc_booted_image: nil, bootc_booted_digest: nil)
+      query
+    end
+
+    def resource_class
+      ::Host::Managed
+    end
+
+    def bootc_host_image_map(host_search)
+      # TODO: can this be optimized such that it doesn't require two queries?
+      content_facets = ::Katello::Host::ContentFacet.where(host_id: ::Host::Managed.joins(:content_facet).search_for(host_search).pluck(:id))
+      aggregate_bootc_data = content_facets.where.not(bootc_booted_image: nil, bootc_booted_digest: nil).
+          select(:bootc_booted_image, :bootc_booted_digest, 'COUNT(hosts.id) as host_count').
+          joins(:host).group(:bootc_booted_image, :bootc_booted_digest).order(:bootc_booted_image)
+      bootc_image_map = Hash.new { |h, k| h[k] = [] }
+      aggregate_bootc_data.each do |host_image|
+        bootc_image_map[host_image.bootc_booted_image] << { bootc_booted_digest: host_image.bootc_booted_digest, host_count: host_image.host_count.to_i }
+      end
+      bootc_image_map
+    end
+  end
+end

config/routes/api/v2.rb

@@ -30,6 +30,10 @@ class ActionDispatch::Routing::Mapper
           end
         end
 
+        api_resources :host_bootc_images, :only => [:bootc_images] do
+          get :auto_complete_search, :on => :collection
+        end
+
         api_resources :capsules, :only => [:index, :show] do
           member do
             resource :content, :only => [], :controller => 'capsule_content' do

config/routes/overrides.rb

@@ -59,6 +59,7 @@ def matches?(request)
 
           collection do
             match '/auto_complete_search' => 'host_autocomplete#auto_complete_search', :via => :get
+            match '/bootc_images' => 'host_bootc_images#bootc_images', :via => :get
             match '/bulk/add_host_collections' => 'hosts_bulk_actions#bulk_add_host_collections', :via => :put
             match '/bulk/remove_host_collections' => 'hosts_bulk_actions#bulk_remove_host_collections', :via => :put
             match '/bulk/remove_host_collections' => 'hosts_bulk_actions#bulk_remove_host_collections', :via => :put

test/controllers/api/v2/host_bootc_images_controller_test.rb

@@ -0,0 +1,52 @@
+# encoding: utf-8
+
+require "katello_test_helper"
+
+module Katello
+  class Api::V2::HostBootcImagesControllerTest < ActionController::TestCase
+    tests ::Katello::Api::V2::HostBootcImagesController
+
+    def setup
+      setup_controller_defaults_api
+      setup_foreman_routes
+      @host1 = FactoryBot.create(:host, :with_content, :with_subscription, :content_view => katello_content_views(:library_dev_view),
+                                :lifecycle_environment => katello_environments(:library))
+      @host2 = FactoryBot.create(:host, :with_content, :with_subscription, :content_view => katello_content_views(:library_dev_view),
+                                :lifecycle_environment => katello_environments(:library))
+      @host3 = FactoryBot.create(:host, :with_content, :with_subscription, :content_view => katello_content_views(:library_dev_view),
+                                :lifecycle_environment => katello_environments(:library))
+      @host1.content_facet.update!(bootc_booted_image: 'image1')
+      @host1.content_facet.update!(bootc_booted_digest: 'sha256:dcfb2965cda67bd3731408ace23dd07ff3116168c2b832e16bba8234525724a3')
+      @host2.content_facet.update!(bootc_booted_image: 'image1')
+      @host2.content_facet.update!(bootc_booted_digest: 'sha256:dcfb2965cda67bd3731408ace23dd07ff3116168c2b832e16bba8234525724a3')
+      @host3.content_facet.update!(bootc_booted_image: 'image2')
+      @host3.content_facet.update!(bootc_booted_digest: 'sha256:dcfb2965cda67bc3731408aae23dd07ff3116168c2b832e16bba8234525724a5')
+    end
+
+    def test_bootc_images_counts_properly_no_paging
+      get :bootc_images
+      assert_response :success
+      results = JSON.parse(@response.body)['bootc_images']
+      assert_includes results, ["image1", [{"bootc_booted_digest" => "sha256:dcfb2965cda67bd3731408ace23dd07ff3116168c2b832e16bba8234525724a3", "host_count" => 2}]]
+      assert_includes results, ["image2", [{"bootc_booted_digest" => "sha256:dcfb2965cda67bc3731408aae23dd07ff3116168c2b832e16bba8234525724a5", "host_count" => 1}]]
+    end
+
+    def test_bootc_images_pages
+      @host2.content_facet.update!(bootc_booted_image: 'image3')
+      @host2.content_facet.update!(bootc_booted_digest: 'sha256:dcfb2965cda67bd3731408ace93dd07ff3116168c2b832e16bba8234525724c9')
+      get :bootc_images, params: { page: 1, per_page: 1 }
+      page1 = @response.body
+      get :bootc_images, params: { page: 2, per_page: 1 }
+      page2 = @response.body
+      get :bootc_images, params: { page: 3, per_page: 1 }
+      page3 = @response.body
+      get :bootc_images, params: { page: 4, per_page: 1 }
+      page4 = @response.body
+
+      assert_equal [["image1", [{"bootc_booted_digest" => "sha256:dcfb2965cda67bd3731408ace23dd07ff3116168c2b832e16bba8234525724a3", "host_count" => 1}]]], JSON.parse(page1)['bootc_images']
+      assert_equal [["image2", [{"bootc_booted_digest" => "sha256:dcfb2965cda67bc3731408aae23dd07ff3116168c2b832e16bba8234525724a5", "host_count" => 1}]]], JSON.parse(page2)['bootc_images']
+      assert_equal [["image3", [{"bootc_booted_digest" => "sha256:dcfb2965cda67bd3731408ace93dd07ff3116168c2b832e16bba8234525724c9", "host_count" => 1}]]], JSON.parse(page3)['bootc_images']
+      assert_empty JSON.parse(page4)['bootc_images']
+    end
+  end
+end