Zad 5

lecture_5/homework/.rspec

@@ -0,0 +1 @@
+--require spec_helper

lecture_5/homework/Gemfile

@@ -35,7 +35,10 @@ gem 'active_model_serializers'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'awesome_print'
   gem 'byebug', platforms: %i[mri mingw x64_mingw]
+  gem 'database_cleaner'
+  gem 'factory_bot_rails'
 end
 
 group :development do

lecture_5/homework/Gemfile.lock

@@ -49,6 +49,7 @@ GEM
       tzinfo (~> 1.1)
     arel (9.0.0)
     ast (2.4.0)
+    awesome_print (1.8.0)
     bootsnap (1.4.1)
       msgpack (~> 1.0)
     builder (3.2.3)
@@ -57,8 +58,14 @@ GEM
       activesupport
     concurrent-ruby (1.1.5)
     crass (1.0.4)
+    database_cleaner (1.7.0)
     diff-lcs (1.3)
     erubi (1.8.0)
+    factory_bot (5.0.2)
+      activesupport (>= 4.2.0)
+    factory_bot_rails (5.0.2)
+      factory_bot (~> 5.0.2)
+      railties (>= 4.2.0)
     ffi (1.10.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
@@ -177,8 +184,11 @@ PLATFORMS
 
 DEPENDENCIES
   active_model_serializers
+  awesome_print
   bootsnap (>= 1.1.0)
   byebug
+  database_cleaner
+  factory_bot_rails
   listen (>= 3.0.5, < 3.2)
   pg
   puma (~> 3.11)

lecture_5/homework/app/controllers/buildings_controller.rb

@@ -1,7 +1,25 @@
 # frozen_string_literal: true
 
 class BuildingsController < ApplicationController
-  def index; end
+  def index
+    render json: buildings, status: 200
+  end
 
-  def show; end
+  def show
+    render json: building
+  end
+
+  private
+
+  def buildings
+    @buildings ||= fetch_buildings.present? ? fetch_buildings : NoBuildings.new.buildings
+  end
+
+  def fetch_buildings
+    BuildingsQueries.buildings(relation: Building)
+  end
+
+  def building
+    @building ||= BuildingsQueries.building(relation: Building, id: params[:id])
+  end
 end

lecture_5/homework/app/controllers/clans/warriors_controller.rb

@@ -10,7 +10,7 @@ def index
       warriors = clan.warriors
 
       if params.key?(:alive)
-        if params[:alive].to_i == 0
+        if params[:alive].to_i.zero?
           render json: warriors.dead
         else
           render json: warriors.alive

lecture_5/homework/app/nulls/no_buildings.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class NoBuildings
+  def buildings
+    { message: 'There are no buildings' }
+  end
+end

lecture_5/homework/app/queries/buildings_queries.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class BuildingsQueries
+  def self.buildings(relation:)
+    relation.includes(:warriors).all
+  end
+
+  def self.building(relation:, id:)
+    relation.find(id)
+  end
+
+  def self.count_warriors_of_specified_type(relation:, building:, type:)
+    relation.find(building.id).warriors.where(type: type).count
+  end
+
+  def self.update_siege_ability(relation:, building:, result:)
+    relation.find(building.id).update(siege_ability: result)
+  end
+end

lecture_5/homework/app/serializers/building_serializer.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class BuildingSerializer < ActiveModel::Serializer
-  attributes :name
+  attributes :name, :siege_ability
 
   has_many :warriors
 end

lecture_5/homework/app/services/reports/siege_report.rb

@@ -3,10 +3,69 @@
 module Reports
   class SiegeReport
     def initialize(building:)
+      @building = building
     end
 
     def call
-      raise NotImprementedYet
+      no_army? ? no_siege_ability : compute_siege_ability
+    end
+
+    private
+
+    def no_army?
+      @building.warriors.empty?
+    end
+
+    def no_siege_ability
+      save_siege_report_result(0)
+      @building.siege_ability = 0
+    end
+
+    def compute_siege_ability
+      daily_food_demand = compute_daily_food_demand
+      result = siege_ability(daily_food_demand)
+      save_siege_report_result(result)
+    end
+
+    def compute_daily_food_demand
+      stronghold_staff + hussars + samurais
+    end
+
+    def stronghold_staff
+      10
+    end
+
+    def hussars
+      BuildingsQueries.count_warriors_of_specified_type(
+        relation: Building,
+        building: @building,
+        type: 'Warriors::Hussar'
+      ) * 2
+    end
+
+    def samurais
+      BuildingsQueries.count_warriors_of_specified_type(
+        relation: Building,
+        building: @building,
+        type: 'Warriors::Samurai'
+      )
+    end
+
+    def siege_ability(daily_food_demand)
+      granary / daily_food_demand
+    end
+
+    def granary
+      @building.granary
+    end
+
+    def save_siege_report_result(result)
+      BuildingsQueries.update_siege_ability(
+        relation: Building,
+        building: @building,
+        result: result
+      )
+      @building.siege_ability = result
     end
   end
 end

lecture_5/homework/config/initializers/active_model_serializers.rb

@@ -1,3 +1,4 @@
 # frozen_string_literal: true
 
 ActiveModelSerializers.config.adapter = :json_api
+ActiveModel::Serializer.config.key_transform = :underscore

lecture_5/homework/db/migrate/20190425195137_add_siege_ability_to_buildings.rb

@@ -0,0 +1,5 @@
+class AddSiegeAbilityToBuildings < ActiveRecord::Migration[5.2]
+  def change
+    add_column :buildings, :siege_ability, :integer
+  end
+end

lecture_5/homework/db/migrate/20190428121458_compute_siege_abilities_of_buildings.rb

@@ -0,0 +1,7 @@
+class ComputeSiegeAbilitiesOfBuildings < ActiveRecord::Migration[5.2]
+  def change
+    Building.find_each do |building|
+      Reports::SiegeReport.new(building: building).call
+    end
+  end
+end

lecture_5/homework/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2019_04_05_090544) do
+ActiveRecord::Schema.define(version: 2019_04_28_121458) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -20,6 +20,8 @@
     t.string "type", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "granary", default: 0, null: false
+    t.integer "siege_ability"
   end
 
   create_table "clans", force: :cascade do |t|

lecture_5/homework/spec/factories/buildings.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :building, class: Building do
+    sequence(:name) { |i| "Building_#{i}" }
+    sequence(:type) { |i| "Buildings::#{i.even? ? 'Walls' : 'Stronghold'}" }
+    granary { 100 }
+  end
+end

lecture_5/homework/spec/factories/clans.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :clan, class: Clan do
+    sequence(:name) { |i| "Clan number #{i}" }
+  end
+end

lecture_5/homework/spec/factories/warriors.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :warrior, class: Warrior do
+    association(:clan)
+    association(:building)
+    sequence(:type) { |i| i.even? ? 'Warriors::Hussar' : 'Warriors::Samurai' }
+    sequence(:name) { |i| "Warrior #{i}" }
+    preferred_weapon_kind { 'melee' }
+    armor_quality { 0 }
+    number_of_battles { 0 }
+    join_date { Time.now }
+    death_date { nil }
+
+    trait :hussar do
+      type { 'Warriors::Hussar' }
+    end
+
+    trait :samurai do
+      type { 'Warriors::Samurai' }
+    end
+  end
+end

lecture_5/homework/spec/rails_helper.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+# This file is copied to spec/ when you run 'rails generate rspec:install'
+require 'spec_helper'
+ENV['RAILS_ENV'] ||= 'test'
+require File.expand_path('../config/environment', __dir__)
+# Prevent database truncation if the environment is production
+abort('The Rails environment is running in production mode!') if Rails.env.production?
+require 'rspec/rails'
+# Add additional requires below this line. Rails is not loaded until this point!
+
+# Requires supporting ruby files with custom matchers and macros, etc, in
+# spec/support/ and its subdirectories. Files matching `spec/**/*_spec.rb` are
+# run as spec files by default. This means that files in spec/support that end
+# in _spec.rb will both be required and run as specs, causing the specs to be
+# run twice. It is recommended that you do not name files matching this glob to
+# end with _spec.rb. You can configure this pattern with the --pattern
+# option on the command line or in ~/.rspec, .rspec or `.rspec-local`.
+#
+# The following line is provided for convenience purposes. It has the downside
+# of increasing the boot-up time by auto-requiring all files in the support
+# directory. Alternatively, in the individual `*_spec.rb` files, manually
+# require only the support files necessary.
+#
+# Dir[Rails.root.join('spec', 'support', '**', '*.rb')].each { |f| require f }
+
+# Checks for pending migrations and applies them before tests are run.
+# If you are not using ActiveRecord, you can remove these lines.
+begin
+  ActiveRecord::Migration.maintain_test_schema!
+rescue ActiveRecord::PendingMigrationError => e
+  puts e.to_s.strip
+  exit 1
+end
+RSpec.configure do |config|
+  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
+  config.fixture_path = "#{::Rails.root}/spec/fixtures"
+
+  config.include FactoryBot::Syntax::Methods
+
+  # If you're not using ActiveRecord, or you'd prefer not to run each of your
+  # examples within a transaction, remove the following line or assign false
+  # instead of true.
+  config.use_transactional_fixtures = true
+
+  # RSpec Rails can automatically mix in different behaviours to your tests
+  # based on their file location, for example enabling you to call `get` and
+  # `post` in specs under `spec/controllers`.
+  #
+  # You can disable this behaviour by removing the line below, and instead
+  # explicitly tag your specs with their type, e.g.:
+  #
+  #     RSpec.describe UsersController, :type => :controller do
+  #       # ...
+  #     end
+  #
+  # The different available types are documented in the features, such as in
+  # https://relishapp.com/rspec/rspec-rails/docs
+  config.infer_spec_type_from_file_location!
+
+  # Filter lines from Rails gems in backtraces.
+  config.filter_rails_from_backtrace!
+  # arbitrary gems may also be filtered via:
+  # config.filter_gems_from_backtrace("gem name")
+
+  config.before(:example) do
+    DatabaseCleaner.clean_with(:truncation)
+  end
+end