Add cold-start follow recommendations (#15945)

app/controllers/admin/follow_recommendations_controller.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+module Admin
+  class FollowRecommendationsController < BaseController
+    before_action :set_language
+
+    def show
+      authorize :follow_recommendation, :show?
+
+      @form     = Form::AccountBatch.new
+      @accounts = filtered_follow_recommendations
+    end
+
+    def update
+      @form = Form::AccountBatch.new(form_account_batch_params.merge(current_account: current_account, action: action_from_button))
+      @form.save
+    rescue ActionController::ParameterMissing
+      # Do nothing
+    ensure
+      redirect_to admin_follow_recommendations_path(filter_params)
+    end
+
+    private
+
+    def set_language
+      @language = follow_recommendation_filter.language
+    end
+
+    def filtered_follow_recommendations
+      follow_recommendation_filter.results
+    end
+
+    def follow_recommendation_filter
+      @follow_recommendation_filter ||= FollowRecommendationFilter.new(filter_params)
+    end
+
+    def form_account_batch_params
+      params.require(:form_account_batch).permit(:action, account_ids: [])
+    end
+
+    def filter_params
+      params.slice(*FollowRecommendationFilter::KEYS).permit(*FollowRecommendationFilter::KEYS)
+    end
+
+    def action_from_button
+      if params[:suppress]
+        'suppress_follow_recommendation'
+      elsif params[:unsuppress]
+        'unsuppress_follow_recommendation'
+      end
+    end
+  end
+end

app/controllers/api/v1/suggestions_controller.rb

@@ -19,6 +19,6 @@ class Api::V1::SuggestionsController < Api::BaseController
   private
 
   def set_accounts
-    @accounts = PotentialFriendshipTracker.get(current_account.id, limit: limit_param(DEFAULT_ACCOUNTS_LIMIT))
+    @accounts = PotentialFriendshipTracker.get(current_account, limit_param(DEFAULT_ACCOUNTS_LIMIT))
   end
 end

app/controllers/api/v2/suggestions_controller.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class Api::V2::SuggestionsController < Api::BaseController
+  include Authorization
+
+  before_action -> { doorkeeper_authorize! :read }
+  before_action :require_user!
+  before_action :set_suggestions
+
+  def index
+    render json: @suggestions, each_serializer: REST::SuggestionSerializer
+  end
+
+  private
+
+  def set_suggestions
+    @suggestions = AccountSuggestions.get(current_account, limit_param(DEFAULT_ACCOUNTS_LIMIT))
+  end
+end