Fixes #38105 - Filter flatpak index to only show host's faltapks

app/controllers/katello/api/registry/registry_proxies_controller.rb

@@ -5,7 +5,7 @@ class Api::Registry::RegistryProxiesController < Api::V2::ApiController
     before_action :confirm_settings
     skip_before_action :authorize
     before_action :optional_authorize, only: [:token, :catalog]
-    before_action :registry_authorize, except: [:token, :v1_search, :catalog]
+    before_action :registry_authorize, except: [:token, :v1_search, :catalog, :static_index]
     before_action :authorize_repository_read, only: [:pull_manifest, :tags_list, :check_blob, :pull_blob]
     before_action :container_push_prop_validation, only: [:start_upload_blob, :upload_blob, :finish_upload_blob, :push_manifest]
     before_action :create_container_repo_if_needed, only: [:start_upload_blob, :upload_blob, :finish_upload_blob, :push_manifest]
@@ -806,5 +806,25 @@ def render_podman_error(code, message, status = :bad_request)
     def item_not_found(item)
       render_podman_error("NAME_UNKNOWN", _("%s was not found!") % item, :not_found)
     end
+
+    def static_index
+      host_ip = request.remote_ip
+      host = ::Host.joins(:primary_interface).where(nics: { ip: host_ip }).first
+      flatpak_index = (redirect_client { Resources::Registry::Proxy.get(@_request.fullpath, headers) })
+      flatpak_index_json = JSON.parse(flatpak_index)
+      # Filter out repositories if it's a registered host
+      if host&.content_view_environments&.any?
+        # host.update(flatpak_index: flatpak_index) Will this help??
+        repos = host.content_view_environments.flat_map do |cve|
+          cve.content_view_version.repositories
+        end
+        available_container_repo_names = repos.map(&:container_repository_name)
+        flatpak_index_json['Results'] = flatpak_index_json['Results'].select do |result|
+          available_container_repo_names.include?(result['Name'])
+        end
+      end
+      # Otherwise just return unfiltered pulp flatpak index
+      render json: flatpak_index_json
+    end
   end
 end

config/routes/api/registry.rb

@@ -19,6 +19,7 @@ class ActionDispatch::Routing::Mapper
       match '/v2' => 'registry_proxies#ping', :via => :get
       match '/v1/_ping' => 'registry_proxies#v1_ping', :via => :get
       match '/v1/search' => 'registry_proxies#v1_search', :via => :get
+      match '/index/static' => 'registry_proxies#static_index', :via => :get
     end
   end
 end

lib/katello/permissions/registry_permissions.rb

@@ -14,4 +14,5 @@
   'katello/api/registry/registry_proxies/start_upload_blob',
   'katello/api/registry/registry_proxies/upload_blob',
   'katello/api/registry/registry_proxies/finish_upload_blob',
+  'katello/api/registry/registry_proxies/static_index'
 ]