Merge multiple Sotechsha[2] resources as Books

app/controllers/books_controller.rb

@@ -0,0 +1,22 @@
+class BooksController < ApplicationController
+  # NOTE: The following URLs are hard-coded by published books.
+  # And the books are just a few, so not a big problem for now.
+  # https://github.com/coderdojo-japan/coderdojo.jp/pull/1696
+
+  # GET /sotechsha[2]
+  def sotechsha1_index; render("books/sotechsha1/index"); end
+  def sotechsha2_index; render("books/sotechsha2/index"); end
+
+  # GET /sotechsha[2]/:page
+  def sotechsha1_show; render_book_page(params); end
+  def sotechsha2_show; render_book_page(params); end
+
+  private
+
+  def render_book_page(params)
+    book_title = params[:action].split('_').first
+    Book.exist?(book_title, params[:page]) ?
+      render("books/#{book_title}/#{params[:page]}") :
+      redirect_to("/#{book_title}", flash: { warning: '該当するページが見つかりませんでした 💦'} )
+  end
+end

app/models/book.rb

@@ -0,0 +1,35 @@
+class Book
+  attr_reader :title, :filename
+  DIR_PATH = 'app/views/books'
+
+  def initialize(title, filename)
+    @title    = title
+    @filename = filename
+  end
+
+  class << self
+    def all
+      Dir.glob("#{DIR_PATH}/*").sort
+    end
+
+    def find(title)
+      Dir.glob("#{DIR_PATH}/#{title}/*.html.erb").sort.map do |page|
+        self.new(title, File.basename(page, '.*'))
+      end
+    end
+
+    def exist?(title, page)
+      page.nil? ?
+        self.find(title).any? :
+        self.find(title).map(&:filename).include?(page + ".html")
+    end
+  end
+
+  def path
+    "#{DIR_PATH}/#{self.title}/#{self.filename}"
+  end
+
+  def exist?
+    Book.find(self.title).map(&:filename).include?(self.filename)
+  end
+end

config/routes.rb

@@ -96,12 +96,12 @@
   get "/.well-known/acme-challenge/:id" => "static_pages#lets_encrypt"
   get "/.well-known/security.txt"       => "static_pages#security"
 
-  # CoderDojo Books from Sotechsha
-  get "/sotechsha"       => "sotechsha_pages#index"
-  get "/sotechsha/:page" => "sotechsha_pages#show"
-
-  get "/sotechsha2"       => "sotechsha2_pages#index"
-  get "/sotechsha2/:page" => "sotechsha2_pages#show"
+  # CoderDojo Books such as published from ソーテック社
+  get "/sotechsha1", to: redirect('/sotechsha')
+  get "/sotechsha"        => "books#sotechsha1_index"
+  get "/sotechsha/:page"  => "books#sotechsha1_show"
+  get "/sotechsha2"       => "books#sotechsha2_index"
+  get "/sotechsha2/:page" => "books#sotechsha2_show"
 
   # Check development sent emails
   mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?