extract finder and add first test

app/controllers/autocomplete_controller.rb

@@ -6,28 +6,7 @@ class AutocompleteController < ApplicationController
   before_action :find_users, only: [:users]
 
   def users
-    @users ||= User.none
-    @users = @users.active
-    @users = @users.reorder(:name)
-    @users = @users.search(params[:search]) if params[:search].present?
-    @users = @users.where.not(id: params[:skip_users]) if params[:skip_users].present?
-    @users = @users.page(params[:page]).per(params[:per_page])
-
-    if params[:todo_filter].present? && current_user
-      @users = @users.todo_authors(current_user.id, params[:todo_state_filter])
-    end
-
-    if params[:search].blank?
-      # Include current user if available to filter by "Me"
-      if params[:current_user].present? && current_user
-        @users = [current_user, *@users].uniq
-      end
-
-      if params[:author_id].present? && current_user
-        author = User.find_by_id(params[:author_id])
-        @users = [author, *@users].uniq if author
-      end
-    end
+    @users = YetAnotherUsersFinder.new(params: params, current_user: current_user, users: @users).execute
 
     render json: @users, only: [:name, :username, :id], methods: [:avatar_url]
   end

app/finders/yet_another_users_finder.rb

+class YetAnotherUsersFinder
+  attr_reader :current_user, :users, :search, :skip_users, :page,
+              :per_page, :author_id, :params
+
+  def initialize(params:, current_user:, users: nil)
+    @current_user = current_user
+    @users = users
+    @search = params[:search]
+    @skip_users = params[:skip_users]
+    @page = params[:page]
+    @per_page = params[:per_page]
+    @author_id = params[:author_id]
+    @params = params
+  end
+
+  def execute
+    items = users || User.none
+    items = items.active
+    items = items.reorder(:name)
+    items = items.search(search) if search.present?
+    items = items.where.not(id: skip_users) if skip_users.present?
+    items = items.page(page).per(per_page)
+
+    if params[:todo_filter].present? && current_user
+      items = items.todo_authors(current_user.id, params[:todo_state_filter])
+    end
+
+    if search.blank?
+      # Include current user if available to filter by "Me"
+      if params[:current_user].present? && current_user
+        items = [current_user, *items].uniq
+      end
+
+      if author_id.present? && current_user
+        author = User.find_by_id(author_id)
+        items = [author, *items].uniq if author
+      end
+    end
+
+    items
+  end
+end

spec/finders/yet_another_users_finder_spec.rb

+require 'spec_helper'
+
+describe YetAnotherUsersFinder do
+  describe '#execute' do
+    let!(:user1) { create(:user, username: 'johndoe') }
+    let!(:user2) { create(:user, :blocked, username: 'notsorandom') }
+    let!(:external_user) { create(:user, :external) }
+    let!(:omniauth_user) { create(:omniauth_user, provider: 'twitter', extern_uid: '123456') }
+    let(:current_user) { create(:user) }
+    let(:params) { {} }
+
+    it 'returns no users' do
+      users = described_class.new(params: params, current_user: current_user).execute
+
+      expect(users.size).to eq(0)
+    end
+
+
+    # context 'with a normal user' do
+    #   let(:user) { create(:user) }
+
+    #   it 'returns all users' do
+    #     users = described_class.new(user).execute
+
+    #     expect(users).to contain_exactly(user, user1, user2, omniauth_user)
+    #   end
+
+    #   it 'filters by username' do
+    #     users = described_class.new(user, username: 'johndoe').execute
+
+    #     expect(users).to contain_exactly(user1)
+    #   end
+
+    #   it 'filters by search' do
+    #     users = described_class.new(user, search: 'orando').execute
+
+    #     expect(users).to contain_exactly(user2)
+    #   end
+
+    #   it 'filters by blocked users' do
+    #     users = described_class.new(user, blocked: true).execute
+
+    #     expect(users).to contain_exactly(user2)
+    #   end
+
+    #   it 'filters by active users' do
+    #     users = described_class.new(user, active: true).execute
+
+    #     expect(users).to contain_exactly(user, user1, omniauth_user)
+    #   end
+
+    #   it 'returns no external users' do
+    #     users = described_class.new(user, external: true).execute
+
+    #     expect(users).to contain_exactly(user, user1, user2, omniauth_user)
+    #   end
+
+    #   it 'filters by created_at' do
+    #     filtered_user_before = create(:user, created_at: 3.days.ago)
+    #     filtered_user_after = create(:user, created_at: Time.now + 3.days)
+
+    #     users = described_class.new(user,
+    #                                 created_after: 2.days.ago,
+    #                                 created_before: Time.now + 2.days).execute
+
+    #     expect(users.map(&:username)).not_to include([filtered_user_before.username, filtered_user_after.username])
+    #   end
+    # end
+
+    # context 'with an admin user' do
+    #   let(:admin) { create(:admin) }
+
+    #   it 'filters by external users' do
+    #     users = described_class.new(admin, external: true).execute
+
+    #     expect(users).to contain_exactly(external_user)
+    #   end
+
+    #   it 'returns all users' do
+    #     users = described_class.new(admin).execute
+
+    #     expect(users).to contain_exactly(admin, user1, user2, external_user, omniauth_user)
+    #   end
+    # end
+  end
+end