Zadanie 5

lecture_2/homework/Gemfile

@@ -9,6 +9,7 @@ gem 'rails', '~> 5.2.2'
 gem 'pg'
 # Use Puma as the app server
 gem 'puma', '~> 3.11'
+gem 'active_model_serializers'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production

lecture_2/homework/Gemfile.lock

@@ -24,6 +24,11 @@ GEM
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    active_model_serializers (0.10.9)
+      actionpack (>= 4.1, < 6)
+      activemodel (>= 4.1, < 6)
+      case_transform (>= 0.2)
+      jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
     activejob (5.2.2.1)
       activesupport (= 5.2.2.1)
       globalid (>= 0.3.6)
@@ -47,6 +52,8 @@ GEM
       msgpack (~> 1.0)
     builder (3.2.3)
     byebug (11.0.0)
+    case_transform (0.2)
+      activesupport
     concurrent-ruby (1.1.5)
     crass (1.0.4)
     erubi (1.8.0)
@@ -55,6 +62,7 @@ GEM
       activesupport (>= 4.2.0)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
+    jsonapi-renderer (0.2.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -133,6 +141,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  active_model_serializers
   bootsnap (>= 1.1.0)
   byebug
   listen (>= 3.0.5, < 3.2)

lecture_2/homework/app/controllers/application_controller.rb

@@ -1,9 +1,3 @@
 class ApplicationController < ActionController::API
-  rescue_from ActiveRecord::RecordNotFound do |exception|
-    render json: { message: exception.message }, status: 404
-  end
-
-  rescue_from ActiveRecord::RecordInvalid do |exception|
-    render json: { message: exception.message }, status: 422
-  end
+  include ErrorsHandler
 end

lecture_2/homework/app/controllers/clans/warriors_controller.rb

@@ -0,0 +1,50 @@
+module Clans
+  class WarriorsController < ApplicationController
+    def show
+      render json: warrior, serializer: Clans::WarriorSerializer
+    end
+
+    def index
+      warriors = clan.warriors
+      if params.key?(:alive)
+        if params[:alive].to_i == 0
+          render json: warriors.dead, each_serializer: Clans::WarriorSerializer
+        else
+          render json: warriors, each_serializer: Clans::WarriorSerializer
+        end
+      else
+        render json: warriors
+      end
+    end
+
+    def create
+      warrior = clan.warriors.create!(warrior_params)
+
+      render json: warrior.to_json, status: 201
+    end
+
+    def update
+      warrior.update!(warrior_params)
+
+      render json: warrior.to_json
+    end
+
+    def destroy
+      warrior.destroy!
+    end
+
+    private
+
+    def clan
+      @clan ||= Clan.find(params[:clan_id])
+    end
+
+    def warrior
+      @warrior ||= Warrior.find_by!(id: params[:id], clan_id: params[:clan_id])
+    end
+
+    def warrior_params
+      params.permit(:name, :death_date, :armor_quality, :number_of_battles, :join_date, :type)
+    end
+  end
+end

lecture_2/homework/app/controllers/clans_controller.rb

@@ -1,6 +1,6 @@
 class ClansController < ApplicationController
   def index
-    render json: Clan.all.to_json
+    render json: Clan.all, each_serializer: ClanSerializer
   end
 
   def create

lecture_2/homework/app/controllers/concerns/errors_handler.rb

@@ -0,0 +1,13 @@
+module ErrorsHandler
+  extend ActiveSupport::Concern
+
+  included do
+    rescue_from ActiveRecord::RecordInvalid do |exception|
+      render json: exception.record.errors, status: :unprocessable_entity
+    end
+
+    rescue_from ActiveRecord::RecordNotFound do |exception|
+      render json: { error: exception.message }, status: :not_found
+    end
+  end
+end

lecture_2/homework/app/models/archer.rb

@@ -0,0 +1,5 @@
+class Archer < Warrior
+    def attack
+        "I aim for the knee. Always."
+    end
+end

lecture_2/homework/app/models/bpp.rb

@@ -0,0 +1,5 @@
+class BPP < Warrior
+  def attack
+    "..."
+  end
+end

lecture_2/homework/app/models/castle.rb

@@ -0,0 +1,3 @@
+class Castle < ApplicationRecord
+    has_many :warriors, as: :defensible
+end

lecture_2/homework/app/models/clan.rb

@@ -1,4 +1,4 @@
 class Clan < ApplicationRecord
-  has_many :samurais, dependent: :destroy
-  validates :name, presence: true
+  has_many :warriors, dependent: :destroy
+  validates :name, presence: true, uniqueness: true
 end

lecture_2/homework/app/models/husarz.rb

@@ -0,0 +1,5 @@
+class Husarz < Warrior
+    def attack
+        "Na pohybel!"
+    end
+end

lecture_2/homework/app/models/magical.rb

@@ -0,0 +1,6 @@
+class Magical < Weapon
+  def calculate_damage(distance)
+    return 0 if distance > range * Random.rand(100)
+    damage * Random.rand(100)
+  end
+end

lecture_2/homework/app/models/melee.rb

@@ -0,0 +1,6 @@
+class Melee < Weapon
+  def calculate_damage(distance)
+    return 0 if distance > range
+    damage
+  end
+end

lecture_2/homework/app/models/ranged.rb

@@ -0,0 +1,7 @@
+class Ranged < Weapon
+  def calculate_damage(distance)
+    return 0 if distance > range
+    f =( (range.to_f/2) - distance.to_f)**2/((range.to_f/2)**2)
+    (damage * (1- f)).to_i
+  end
+end

lecture_2/homework/app/models/samurai.rb

@@ -1,11 +1,5 @@
-class Samurai < ApplicationRecord
-  belongs_to :clan
-
-  validates :name, presence: true
-  validates :armor_quality, numericality: { only_integer: true,
-                                            greater_than_or_equal_to: 0,
-                                            less_than_or_equal_to: 100 }
-
-  scope :alive, -> { where('death_date IS NULL') }
-  scope :dead, -> { where('death_date IS NOT NULL') }
+class Samurai < Warrior
+  def attack
+    "Nani?!"
+  end
 end

lecture_2/homework/app/models/tower.rb

@@ -0,0 +1,3 @@
+class Tower < ApplicationRecord
+    has_many :warriors, as: :defensible
+end

lecture_2/homework/app/models/wall.rb

@@ -0,0 +1,3 @@
+class Wall < ApplicationRecord
+    has_many :warriors, as: :defensible
+end

lecture_2/homework/app/models/warrior.rb

@@ -0,0 +1,16 @@
+class Warrior < ApplicationRecord
+    belongs_to :clan
+    belongs_to :defensible, polymorphic: true
+    has_one :weapon, dependent: :destroy 
+    validates :name, presence: true, uniqueness: {conditions: -> {where('death_date IS NULL')}}
+    validates :armor_quality, numericality: { only_integer: true,
+                                              greater_than_or_equal_to: 0,
+                                              less_than_or_equal_to: 100 }
+
+    scope :alive, -> { where('death_date IS NULL') }
+    scope :dead, -> { where('death_date IS NOT NULL') }
+
+    def attack
+        "Ugabuga!"
+    end
+end

lecture_2/homework/app/models/weapon.rb

@@ -0,0 +1,11 @@
+class Weapon < ApplicationRecord
+    belongs_to :warrior
+
+    validates :damage, :range, presence: true, numericality: { only_integer: true,
+        greater_than_or_equal_to: 0,
+        less_than_or_equal_to: 100 }
+
+    def calculate_damage(distance)
+        0
+    end
+end

lecture_2/homework/app/serializers/clan_serializer.rb

@@ -0,0 +1,11 @@
+class ClanSerializer < ActiveModel::Serializer
+  attributes :name, :warriors
+  def warriors
+    object.warriors.map do |warrior|
+      {
+        name: warrior.name,
+        type: warrior.type}
+      end
+  end
+
+end

lecture_2/homework/app/serializers/warrior_serializer.rb

@@ -0,0 +1,23 @@
+
+  class WarriorSerializer < ActiveModel::Serializer
+    attributes :id, :name, :defensible, :weapon, :attack
+
+    def weapon
+      d = object.weapon 
+      if d.nil? then 
+        return nil
+      end
+       { type: d.type,
+        range: d.range,
+        damage: d.damage}
+
+    end
+
+    def defensible
+      d = object.defensible
+       { type: d.class.table_name,
+         name: d.name}
+
+    end
+
+  end

lecture_2/homework/config/application.rb

@@ -21,7 +21,7 @@ module Lecture1
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 5.2
-
+    ActiveModelSerializers.config.adapter = :json_api
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading

lecture_2/homework/config/database.yml

@@ -9,3 +9,5 @@ development:
 test: &test
   <<: *default
   database: flode_test
+  host: localhost
+

lecture_2/homework/config/routes.rb

@@ -1,5 +1,7 @@
 Rails.application.routes.draw do
   resources :clans, only: %i[index create] do
-    resources :samurais, module: :clans
+    resources :warriors, module: :clans
   end
+
+
 end

lecture_2/homework/db/migrate/20190314150921_create_clans_and_samurais.rb

@@ -1,7 +1,7 @@
 class CreateClansAndSamurais < ActiveRecord::Migration[5.2]
   def change
     create_table :clans do |t|
-      t.string :name, null: false
+      t.string :name, null: false, uniquness: true
       t.timestamps
     end
 

lecture_2/homework/db/migrate/20190408195814_change_samurais_to_warriors.rb

@@ -0,0 +1,6 @@
+class ChangeSamuraisToWarriors < ActiveRecord::Migration[5.2]
+  def change
+    rename_table :samurais, :warriors
+    add_column :warriors, :type, :string, default: 'Samurai'
+  end
+end

lecture_2/homework/db/migrate/20190408202445_add_defensible_to_warriors.rb

@@ -0,0 +1,5 @@
+class AddDefensibleToWarriors < ActiveRecord::Migration[5.2]
+  def change
+    add_reference :warriors, :defensible, polymorphic: true, index: true
+  end
+end

lecture_2/homework/db/migrate/20190408202703_create_walls.rb

@@ -0,0 +1,17 @@
+class CreateWalls < ActiveRecord::Migration[5.2]
+  def change
+    create_table :walls do |t|
+      t.string :name, null: false
+      t.timestamps
+    end
+    create_table :towers do |t|
+      t.string :name, null: false
+      t.timestamps
+    end 
+    create_table :castles do |t|
+      t.string :name, null: false
+      t.timestamps
+    end
+
+  end
+end

lecture_2/homework/db/migrate/20190408213939_add_weapon_to_warrior.rb

@@ -0,0 +1,14 @@
+class AddWeaponToWarrior < ActiveRecord::Migration[5.2]
+  def change
+
+    create_table :weapons do |t|
+      t.integer :damage, null: false
+      t.integer :range, null: false
+      t.timestamps
+      t.string :type, null: false
+    end
+
+    add_reference :weapons, :warrior
+
+  end
+end