Add ability to filter individual posts (#18945)

* Add database table for status-specific filters

* Add REST endpoints, entities and attributes

* Show status filters in /filters interface

* Perform server-side filtering for individual posts filters

* Fix filtering on context mismatch

* Refactor `toServerSideType` by moving it to its own module

* Move loupe and delete icons to their own module

* Add ability to filter individual posts from WebUI

* Replace keyword list by warnings (expired, context mismatch)

* Refactor server-side filtering code

* Add tests

3 files changed, 94 insertions, 1 deletions

diff --git a/app/controllers/api/v1/filters/statuses_controller.rb b/app/controllers/api/v1/filters/statuses_controller.rb
new file mode 100644
index 000000000..b6bed306f
--- /dev/null
+++ b/app/controllers/api/v1/filters/statuses_controller.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+class Api::V1::Filters::StatusesController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read, :'read:filters' }, only: [:index, :show]
+  before_action -> { doorkeeper_authorize! :write, :'write:filters' }, except: [:index, :show]
+  before_action :require_user!
+
+  before_action :set_status_filters, only: :index
+  before_action :set_status_filter, only: [:show, :destroy]
+
+  def index
+    render json: @status_filters, each_serializer: REST::FilterStatusSerializer
+  end
+
+  def create
+    @status_filter = current_account.custom_filters.find(params[:filter_id]).statuses.create!(resource_params)
+
+    render json: @status_filter, serializer: REST::FilterStatusSerializer
+  end
+
+  def show
+    render json: @status_filter, serializer: REST::FilterStatusSerializer
+  end
+
+  def destroy
+    @status_filter.destroy!
+    render_empty
+  end
+
+  private
+
+  def set_status_filters
+    filter = current_account.custom_filters.includes(:statuses).find(params[:filter_id])
+    @status_filters = filter.statuses
+  end
+
+  def set_status_filter
+    @status_filter = CustomFilterStatus.includes(:custom_filter).where(custom_filter: { account: current_account }).find(params[:id])
+  end
+
+  def resource_params
+    params.permit(:status_id)
+  end
+end
diff --git a/app/controllers/filters/statuses_controller.rb b/app/controllers/filters/statuses_controller.rb
new file mode 100644
index 000000000..cc493c22c
--- /dev/null
+++ b/app/controllers/filters/statuses_controller.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+class Filters::StatusesController < ApplicationController
+  layout 'admin'
+
+  before_action :authenticate_user!
+  before_action :set_filter
+  before_action :set_status_filters
+  before_action :set_body_classes
+
+  PER_PAGE = 20
+
+  def index
+    @status_filter_batch_action = Form::StatusFilterBatchAction.new
+  end
+
+  def batch
+    @status_filter_batch_action = Form::StatusFilterBatchAction.new(status_filter_batch_action_params.merge(current_account: current_account, filter_id: params[:filter_id], type: action_from_button))
+    @status_filter_batch_action.save!
+  rescue ActionController::ParameterMissing
+    flash[:alert] = I18n.t('admin.statuses.no_status_selected')
+  ensure
+    redirect_to edit_filter_path(@filter)
+  end
+
+  private
+
+  def set_filter
+    @filter = current_account.custom_filters.find(params[:filter_id])
+  end
+
+  def set_status_filters
+    @status_filters = @filter.statuses.preload(:status).page(params[:page]).per(PER_PAGE)
+  end
+
+  def status_filter_batch_action_params
+    params.require(:form_status_filter_batch_action).permit(status_filter_ids: [])
+  end
+
+  def action_from_button
+    if params[:remove]
+      'remove'
+    end
+  end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
+end
diff --git a/app/controllers/filters_controller.rb b/app/controllers/filters_controller.rb
index 5ed53bce1..cc5cb5d9f 100644
--- a/app/controllers/filters_controller.rb
+++ b/app/controllers/filters_controller.rb
@@ -8,7 +8,7 @@ class FiltersController < ApplicationController
   before_action :set_body_classes
 
   def index
-    @filters = current_account.custom_filters.includes(:keywords).order(:phrase)
+    @filters = current_account.custom_filters.includes(:keywords, :statuses).order(:phrase)
   end
 
   def new