Add ability to filter instances by those which are not limited

app/controllers/admin/instances_controller.rb

@@ -56,6 +56,12 @@ module Admin
     end
 
     def set_instances
+      # If we have `limited` in the query parameters, remove it and redirect to suspended:
+      return redirect_to admin_instances_path filter_params.merge(status: :suspended) if params[:limited].present?
+
+      # If we're in limited federation mode and have a status parameter, remove it:
+      return redirect_to admin_instances_path filter_params.merge(status: nil) if limited_federation_mode? && params[:status].present?
+
       @instances = filtered_instances.page(params[:page])
     end
 
@@ -68,7 +74,7 @@ module Admin
     end
 
     def filtered_instances
-      InstanceFilter.new(limited_federation_mode? ? { allowed: true } : filter_params).results
+      InstanceFilter.new(limited_federation_mode? ? filter_params.merge(status: :allowed) : filter_params).results
     end
 
     def filter_params

app/models/instance_filter.rb

@@ -2,7 +2,7 @@
 
 class InstanceFilter
   KEYS = %i(
-    limited
+    status
     by_domain
     availability
   ).freeze
@@ -27,10 +27,8 @@ class InstanceFilter
 
   def scope_for(key, value)
     case key.to_s
-    when 'limited'
+    when 'status'
-      Instance.joins(:domain_block).reorder(domain_blocks: { id: :desc })
+      status_scope(value)
-    when 'allowed'
-      Instance.joins(:domain_allow).reorder(domain_allows: { id: :desc })
     when 'by_domain'
       Instance.matches_domain(value)
     when 'availability'
@@ -40,6 +38,27 @@ class InstanceFilter
     end
   end
 
+  def status_scope(value)
+    # The `join where` queries here look like they have a bug due to `domain_block`
+    # vs `domain_blocks`, however the table is `domain_blocks` while the relation on
+    # Instances is `domain_block`
+    case value.to_sym
+    when :allowed
+      Instance.joins(:domain_allow).reorder(Arel.sql('domain_allows.id desc'))
+    when :suspended
+      Instance.joins(:domain_block).where(domain_blocks: { severity: :suspend }).reorder(Arel.sql('domain_blocks.id desc'))
+    when :silenced
+      Instance.joins(:domain_block).where(domain_blocks: { severity: :silence }).reorder(Arel.sql('domain_blocks.id desc'))
+    when :noop
+      Instance.joins(:domain_block).where(domain_blocks: { severity: :noop }).reorder(Arel.sql('domain_blocks.id desc'))
+    when :not_limited
+      # Finds all instances where there isn't a record in the domain_blocks table
+      Instance.left_outer_joins(:domain_block).where(domain_blocks: { domain: nil })
+    else
+      raise Mastodon::InvalidParameterError, "Unknown limited scope value: #{value}"
+    end
+  end
+
   def availability_scope(value)
     case value
     when 'failing'

app/views/admin/instances/index.html.haml

@@ -15,10 +15,14 @@
   .filter-subset
     %strong= t('admin.instances.moderation.title')
     %ul
-      %li= filter_link_to t('admin.instances.moderation.all'), limited: nil
+      - if limited_federation_mode?
-
+        %li= filter_link_to t('admin.instances.moderation.allowed'), status: nil
-      - unless limited_federation_mode?
+      - else
-        %li= filter_link_to t('admin.instances.moderation.limited'), limited: '1'
+        %li= filter_link_to t('admin.instances.moderation.all'), status: nil
+        %li= filter_link_to t('admin.instances.moderation.not_limited'), status: 'not_limited'
+        %li= filter_link_to t('admin.instances.moderation.noop'), status: 'noop'
+        %li= filter_link_to t('admin.instances.moderation.silenced'), status: 'silenced'
+        %li= filter_link_to t('admin.instances.moderation.suspended'), status: 'suspended'
 
   .filter-subset
     %strong= t('admin.instances.availability.title')
@@ -27,18 +31,16 @@
       %li= filter_link_to t('admin.instances.delivery.failing'), availability: 'failing'
       %li= filter_link_to t('admin.instances.delivery.unavailable'), availability: 'unavailable'
 
-- unless limited_federation_mode?
+= form_with url: admin_instances_url, method: :get, class: :simple_form do |form|
-  = form_with url: admin_instances_url, method: :get, class: :simple_form do |form|
   .fields-group
     - InstanceFilter::KEYS.each do |key|
       = form.hidden_field key, value: params[key] if params[key].present?
 
-      - %i(by_domain).each do |key|
     .input.string.optional
-          = form.text_field key,
+      = form.text_field :by_domain,
-                            value: params[key],
+                        value: params[:by_domain],
                         class: 'string optional',
-                            placeholder: I18n.t("admin.instances.#{key}")
+                        placeholder: t('admin.instances.by_domain')
 
     .actions
       %button.button= t('admin.accounts.search')

config/locales/en.yml

@@ -539,7 +539,11 @@ en:
         other: "%{count} known accounts"
       moderation:
         all: All
-        limited: Limited
+        allowed: Allowed
+        noop: Filtered
+        not_limited: Not Limited
+        silenced: Silenced
+        suspended: Suspended
         title: Moderation
       private_comment: Private comment
       public_comment: Public comment

spec/controllers/admin/instances_controller_spec.rb

@@ -34,6 +34,20 @@ RSpec.describe Admin::InstancesController do
       expect(response).to have_http_status(200)
     end
 
+    describe 'outdated filter parameters' do
+      it 'redirect to status suspended when just limited is set' do
+        get :index, params: { limited: 1 }
+
+        expect(response).to redirect_to admin_instances_path({ status: :suspended })
+      end
+
+      it 'retains other filters when redirecting if limited is set' do
+        get :index, params: { limited: 1, availability: 'failing' }
+
+        expect(response).to redirect_to admin_instances_path({ status: :suspended, availability: 'failing' })
+      end
+    end
+
     def instance_directory_links
       response.parsed_body.css('div.directory__tag a')
     end