【チャレンジ課題】電気料金を返すAPIの実装 monakam01

serverside_challenge_2/challenge/.rspec

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

serverside_challenge_2/challenge/.rubocop.yml

@@ -0,0 +1,10 @@
+Documentation:
+  Enabled: false
+MethodLength:
+  CountComments: true 
+  Max: 25 
+  Style/FrozenStringLiteralComment:
+  Enabled: false
+Metrics:
+  Enabled: false
+

serverside_challenge_2/challenge/Gemfile

@@ -36,9 +36,12 @@ gem "bootsnap", require: false
 # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
 # gem "rack-cors"
 
+gem 'rubocop-rails', '~> 2.32'
+
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
   gem "debug", platforms: %i[ mri mingw x64_mingw ]
+  gem 'rspec-rails'
 end
 
 group :development do

serverside_challenge_2/challenge/Gemfile.lock

@@ -66,6 +66,7 @@ GEM
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
+    ast (2.4.3)
     bootsnap (1.18.3)
       msgpack (~> 1.2)
     builder (3.2.4)
@@ -75,6 +76,7 @@ GEM
     debug (1.9.1)
       irb (~> 1.10)
       reline (>= 0.3.8)
+    diff-lcs (1.6.2)
     erubi (1.12.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
@@ -84,6 +86,9 @@ GEM
     irb (1.11.2)
       rdoc
       reline (>= 0.4.2)
+    json (2.13.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
     loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -111,7 +116,12 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.2-x86_64-linux)
       racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.8.0)
+      ast (~> 2.4.1)
+      racc
     pg (1.5.4)
+    prism (1.4.0)
     psych (5.1.2)
       stringio
     puma (5.6.8)
@@ -148,16 +158,59 @@ GEM
       rake (>= 12.2)
       thor (~> 1.0)
       zeitwerk (~> 2.5)
+    rainbow (3.1.1)
     rake (13.1.0)
     rdoc (6.6.2)
       psych (>= 4.0.0)
+    regexp_parser (2.10.0)
     reline (0.4.2)
       io-console (~> 0.5)
+    rspec-core (3.13.5)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-rails (7.1.1)
+      actionpack (>= 7.0)
+      activesupport (>= 7.0)
+      railties (>= 7.0)
+      rspec-core (~> 3.13)
+      rspec-expectations (~> 3.13)
+      rspec-mocks (~> 3.13)
+      rspec-support (~> 3.13)
+    rspec-support (3.13.4)
+    rubocop (1.78.0)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.45.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.46.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-rails (2.32.0)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    ruby-progressbar (1.13.0)
     stringio (3.1.0)
     thor (1.3.0)
     timeout (0.4.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    unicode-display_width (3.1.4)
+      unicode-emoji (~> 4.0, >= 4.0.4)
+    unicode-emoji (4.0.4)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -173,6 +226,8 @@ DEPENDENCIES
   pg (~> 1.1)
   puma (~> 5.0)
   rails (~> 7.0.8)
+  rspec-rails
+  rubocop-rails (~> 2.32)
   tzinfo-data
 
 RUBY VERSION

serverside_challenge_2/challenge/app/controllers/api/v1/power_supply_plan_controller.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module Api
+  module V1
+    class PowerSupplyPlanController < ApplicationController
+      def simulate_all
+        simulator = PowerSupplyPlanSimulator.new(params[:amp], params[:meter_rate])
+        result = simulator.call
+
+        return render json: [result] if result.is_a?(Hash) && result.key?(:error)
+
+        render json: result
+      end
+    end
+  end
+end

serverside_challenge_2/challenge/app/models/basic_charge.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class BasicCharge < ApplicationRecord
+  belongs_to :power_supply_plan
+end

serverside_challenge_2/challenge/app/models/meter_rate_charge.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class MeterRateCharge < ApplicationRecord
+  belongs_to :power_supply_plan
+
+  def calculate_charge(meter_rate)
+    min_rate = min_meter_rate
+    max_rate = max_meter_rate
+    step_price = price
+    return 0 if min_rate > meter_rate
+
+    if max_rate.nil?
+      return step_price * meter_rate if min_rate.zero?
+
+      return step_price * (meter_rate - min_rate + 1)
+    end
+    if max_rate.to_i < meter_rate.to_i
+      return step_price * (max_rate - min_rate) if min_rate.zero?
+
+      step_price * (max_rate - min_rate + 1)
+    else
+      return step_price * (meter_rate - min_rate) if min_rate.zero?
+
+      step_price * (meter_rate - min_rate + 1)
+    end
+  end
+end

serverside_challenge_2/challenge/app/models/power_supply_plan.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class PowerSupplyPlan < ApplicationRecord
+  belongs_to :provider
+  has_many :meter_rate_charges
+  has_many :basic_charges
+
+  def calculate_total_amount(amp, meter_rate)
+    basic_charge_record = basic_charges.where(amp: amp)
+    return nil if basic_charge_record.blank?
+
+    basic_charge_amount = basic_charge_record.first.price.to_f
+    meter_rate_charge_amount = calculate_meter_rate_charge(meter_rate)
+    (basic_charge_amount + meter_rate_charge_amount).floor(0).to_i
+  end
+
+  def calculate_meter_rate_charge(meter_rate)
+    total_meter_rate_charges = 0
+
+    meter_rate_charges.each do |step|
+      total_meter_rate_charges += step.calculate_charge(meter_rate.to_i)
+    end
+    total_meter_rate_charges
+  end
+end

serverside_challenge_2/challenge/app/models/provider.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class Provider < ApplicationRecord
+  has_many :power_supply_plans
+end

serverside_challenge_2/challenge/app/services/power_supply_plan_simulator.rb

@@ -0,0 +1,60 @@
+class PowerSupplyPlanSimulator
+  VALID_AMPS = [10, 15, 20, 30, 40, 50, 60].freeze
+
+  def initialize(amp, meter_rate)
+    @amp = amp
+    @meter_rate = meter_rate
+    @errors = []
+  end
+
+  def call
+    unless validate_params
+      return {
+        error: {
+          code: 400,
+          message: @errors.join('\n')
+        }
+      }
+    end
+
+    result = []
+    PowerSupplyPlan.includes(:provider, :meter_rate_charges, :basic_charges).each do |plan|
+      calculate_result = plan.calculate_total_amount(@amp, @meter_rate)
+      next unless calculate_result
+
+      result << {
+        "provider_name": plan.provider.name,
+        "plan_name": plan.name,
+        "price": calculate_result
+      }
+    end
+    result
+  end
+
+  def validate_params
+    if @amp.blank?
+      @errors << "リクエストパラメータ 'amp' が不足しています。"
+    else
+      @errors << "リクエストパラメータ 'amp' の値が不正です。'10 / 15 / 20 / 30 / 40 / 50 / 60' のいずれかの値を指定してください。" unless valid_amp?(@amp)
+    end
+    if @meter_rate.blank?
+      @errors << "リクエストパラメータ 'meter_rate' が不足しています。"
+    else
+      unless numeric?(@meter_rate) && @meter_rate.to_i >= 0
+        @errors << "リクエストパラメータ 'meter_rate' の値が不正です。0以上の整数を指定してください。"
+      end
+    end
+    @errors.blank?
+  end
+
+  def numeric?(string)
+    Integer(string)
+    true
+  rescue ArgumentError, TypeError
+    false
+  end
+
+  def valid_amp?(amp)
+    VALID_AMPS.include?(amp.to_i)
+  end
+end

serverside_challenge_2/challenge/config/credentials.yml.enc

@@ -1 +1 @@
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--97QWVDZ45R2Bjr3G--byi/t6soITzi5vJv5PEsvw==

serverside_challenge_2/challenge/config/routes.rb

@@ -3,4 +3,9 @@
 
   # Defines the root path route ("/")
   # root "articles#index"
+  namespace :api do
+    namespace :v1 do
+      get "simulate_all_plan", to: "power_supply_plan#simulate_all"
+    end
+  end
 end

serverside_challenge_2/challenge/db/migrate/20250723134304_create_basic_charges.rb

@@ -0,0 +1,34 @@
+class CreateBasicCharges < ActiveRecord::Migration[7.0]
+  def change
+    create_table :providers do |t|
+      t.string :provider_name, :null => false
+      t.string :rounding_amount_method, :null => false
+
+      t.timestamps
+    end
+
+    create_table :power_supply_plans do |t|
+      t.belongs_to :provider
+      t.string :plan_name, :null => false
+
+      t.timestamps
+    end
+
+    create_table :meter_rate_charges do |t|
+      t.belongs_to :power_supply_plan
+      t.integer :min_meter_rate, :null => false
+      t.integer :max_meter_rate
+      t.decimal :price, precision: 6, scale: 2, :null => false
+
+      t.timestamps
+    end
+
+    create_table :basic_charges do |t|
+      t.belongs_to :power_supply_plan 
+      t.integer :amp, :null => false
+      t.decimal :price, precision: 6, scale: 2, :null => false
+
+      t.timestamps
+    end
+  end
+end

serverside_challenge_2/challenge/db/migrate/20250726103216_remove_rounding_amount_method_from_provider.rb

@@ -0,0 +1,9 @@
+class RemoveRoundingAmountMethodFromProvider < ActiveRecord::Migration[7.0]
+  def up
+    remove_column :providers, :rounding_amount_method, :string
+  end
+
+  def down
+    add_column :providers, :rounding_amount_method, :string
+  end
+end

serverside_challenge_2/challenge/db/migrate/20250726111141_rename_provider_name_column_to_name.rb

@@ -0,0 +1,5 @@
+class RenameProviderNameColumnToName < ActiveRecord::Migration[7.0]
+  def change
+    rename_column :providers, :provider_name, :name
+  end
+end

serverside_challenge_2/challenge/db/migrate/20250726111346_rename_plan__name_column_to_name.rb

@@ -0,0 +1,5 @@
+class RenamePlanNameColumnToName < ActiveRecord::Migration[7.0]
+  def change
+        rename_column :power_supply_plans, :plan_name, :name
+  end
+end