From https://once.com/writebook

config/application.rb

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+require_relative "boot"
+
+require "rails/all"
+
+# Require the gems listed in Gemfile, including any gems
+# you've limited to :test, :development, or :production.
+Bundler.require(*Rails.groups)
+
+module Writebook
+  class Application < Rails::Application
+    # Initialize configuration defaults for originally generated Rails version.
+    config.load_defaults 7.2
+
+    # Please, add to the `ignore` list any other `lib` subdirectories that do
+    # not contain `.rb` files, or that should not be reloaded or eager loaded.
+    # Common ones are `templates`, `generators`, or `middleware`, for example.
+    config.autoload_lib(ignore: %w[rails_ext assets tasks])
+
+    # Configuration for the application, engines, and railties goes here.
+    #
+    # These settings can be overridden in specific environments using the files
+    # in config/environments, which are processed later.
+    #
+    # config.time_zone = "Central Time (US & Canada)"
+    # config.eager_load_paths << Rails.root.join("extras")
+  end
+end

config/boot.rb

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+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "bundler/setup" # Set up gems listed in the Gemfile.

config/cable.yml

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+development:
+  adapter: redis
+  url: redis://localhost:6379/1
+
+test:
+  adapter: test
+
+production:
+  adapter: redis
+  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
+  channel_prefix: writebook_production

config/database.yml

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+default: &default
+  adapter: sqlite3
+  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 10 } %>
+  retries: 100
+  default_transaction_mode: immediate
+
+development:
+  primary:
+    <<: *default
+    database: storage/db/development.sqlite3
+
+test:
+  primary:
+    <<: *default
+    database: storage/db/test.sqlite3
+
+production:
+  primary:
+    <<: *default
+    database: storage/db/production.sqlite3

config/environment.rb

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+# Load the Rails application.
+require_relative "application"
+
+# Initialize the Rails application.
+Rails.application.initialize!

config/environments/development.rb

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+require "active_support/core_ext/integer/time"
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # In the development environment your application's code is reloaded any time
+  # it changes. This slows down response time but is perfect for development
+  # since you don't have to restart the web server when you make code changes.
+  config.enable_reloading = true
+
+  # Do not eager load code on boot.
+  config.eager_load = false
+
+  # Show full error reports.
+  config.consider_all_requests_local = true
+
+  # Enable server timing
+  config.server_timing = true
+
+  # Enable/disable caching. By default caching is disabled.
+  # Run rails dev:cache to toggle caching.
+  if Rails.root.join("tmp/caching-dev.txt").exist?
+    config.action_controller.perform_caching = true
+    config.action_controller.enable_fragment_cache_logging = true
+
+    config.cache_store = :memory_store
+    config.public_file_server.headers = { "Cache-Control" => "public, max-age=#{2.days.to_i}" }
+  else
+    config.action_controller.perform_caching = false
+
+    config.cache_store = :null_store
+  end
+
+  # Store uploaded files on the local file system (see config/storage.yml for options).
+  config.active_storage.service = :local
+
+  # Don't care if the mailer can't send.
+  config.action_mailer.raise_delivery_errors = false
+
+  config.action_mailer.perform_caching = false
+
+  # Print deprecation notices to the Rails logger.
+  config.active_support.deprecation = :log
+
+  # Raise exceptions for disallowed deprecations.
+  config.active_support.disallowed_deprecation = :raise
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
+  # Raise an error on page load if there are pending migrations.
+  config.active_record.migration_error = :page_load
+
+  # Highlight code that triggered database queries in logs.
+  config.active_record.verbose_query_logs = true
+
+  # Highlight code that enqueued background job in logs.
+  config.active_job.verbose_enqueue_logs = true
+
+  # Raises error for missing translations.
+  # config.i18n.raise_on_missing_translations = true
+
+  # Annotate rendered view with file names.
+  config.action_view.annotate_rendered_view_with_filenames = true
+
+  # Uncomment if you wish to allow Action Cable access from any origin.
+  # config.action_cable.disable_request_forgery_protection = true
+
+  # Raise error when a before_action's only/except options reference missing actions
+  config.action_controller.raise_on_missing_callback_actions = true
+
+  # Apply autocorrection by RuboCop to files generated by `bin/rails generate`.
+  config.generators.apply_rubocop_autocorrect_after_generate!
+end

config/environments/production.rb

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+require "active_support/core_ext/integer/time"
+require "active_support/core_ext/numeric/bytes"
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # Code is not reloaded between requests.
+  config.enable_reloading = false
+
+  # Eager load code on boot. This eager loads most of Rails and
+  # your application in memory, allowing both threaded web servers
+  # and those relying on copy on write to perform better.
+  # Rake tasks automatically ignore this option for performance.
+  config.eager_load = true
+
+  # Full error reports are disabled and caching is turned on.
+  config.consider_all_requests_local       = false
+  config.action_controller.perform_caching = true
+
+  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
+  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
+  # config.require_master_key = true
+
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
+  # config.asset_host = "http://assets.example.com"
+
+  # Store uploaded files on the local file system (see config/storage.yml for options).
+  config.active_storage.service = :local
+
+  # Log to STDOUT by default
+  config.logger = ActiveSupport::Logger.new(STDOUT)
+    .tap  { |logger| logger.formatter = ::Logger::Formatter.new }
+    .then { |logger| ActiveSupport::TaggedLogging.new(logger) }
+
+  # Prepend all log lines with the following tags.
+  config.log_tags = [ :request_id ]
+
+  # Info include generic and useful information about system operation, but avoids logging too much
+  # information to avoid inadvertent exposure of personally identifiable information (PII). Use "debug"
+  # for everything.
+  config.log_level = ENV.fetch("RAILS_LOG_LEVEL", "info")
+
+  # Cache in memory for now
+  config.cache_store = :redis_cache_store
+
+  # Assets are cacheable
+  config.public_file_server.headers = {
+    "Cache-Control" => "public, max-age=#{1.year.to_i}"
+  }
+
+  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
+  # the I18n.default_locale when a translation cannot be found).
+  config.i18n.fallbacks = true
+
+  # Always be SSL'ing (unless told not to)
+  config.assume_ssl = ENV["DISABLE_SSL"].blank?
+  config.force_ssl  = ENV["DISABLE_SSL"].blank?
+
+  # Don't log any deprecations.
+  config.active_support.report_deprecations = false
+
+  # Do not dump schema after migrations.
+  config.active_record.dump_schema_after_migration = false
+
+  # SQLite is good, actually
+  config.active_record.sqlite3_production_warning = false
+
+  config.active_job.queue_adapter = :resque
+end

config/environments/test.rb

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+require "active_support/core_ext/integer/time"
+
+# The test environment is used exclusively to run your application's
+# test suite. You never need to work with it otherwise. Remember that
+# your test database is "scratch space" for the test suite and is wiped
+# and recreated between test runs. Don't rely on the data there!
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # While tests run files are not watched, reloading is not necessary.
+  config.enable_reloading = false
+
+  # Eager loading loads your entire application. When running a single test locally,
+  # this is usually not necessary, and can slow down your test suite. However, it's
+  # recommended that you enable it in continuous integration systems to ensure eager
+  # loading is working properly before deploying your code.
+  config.eager_load = ENV["CI"].present?
+
+  # Configure public file server for tests with Cache-Control for performance.
+  config.public_file_server.headers = { "Cache-Control" => "public, max-age=#{1.hour.to_i}" }
+
+  # Show full error reports and disable caching.
+  config.consider_all_requests_local = true
+  config.action_controller.perform_caching = false
+  config.cache_store = :null_store
+
+  # Render exception templates for rescuable exceptions and raise for other exceptions.
+  config.action_dispatch.show_exceptions = :rescuable
+
+  # Disable request forgery protection in test environment.
+  config.action_controller.allow_forgery_protection = false
+
+  # Store uploaded files on the local file system in a temporary directory.
+  config.active_storage.service = :test
+
+  config.action_mailer.perform_caching = false
+
+  # Tell Action Mailer not to deliver emails to the real world.
+  # The :test delivery method accumulates sent emails in the
+  # ActionMailer::Base.deliveries array.
+  config.action_mailer.delivery_method = :test
+
+  # Print deprecation notices to the stderr.
+  config.active_support.deprecation = :stderr
+
+  # Raise exceptions for disallowed deprecations.
+  config.active_support.disallowed_deprecation = :raise
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
+  # Raises error for missing translations.
+  # config.i18n.raise_on_missing_translations = true
+
+  # Annotate rendered view with file names.
+  # config.action_view.annotate_rendered_view_with_filenames = true
+
+  # Raise error when a before_action's only/except options reference missing actions
+  config.action_controller.raise_on_missing_callback_actions = true
+
+  # Load test helpers
+  config.autoload_paths += %w[ test/test_helpers ]
+end

config/importmap.rb

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+# Pin npm packages by running ./bin/importmap
+
+pin "application"
+pin "@hotwired/turbo-rails", to: "turbo.min.js"
+pin "@hotwired/stimulus", to: "stimulus.min.js"
+pin "@hotwired/stimulus-loading", to: "stimulus-loading.js"
+pin "@rails/request.js", to: "@rails--request.js" # @0.0.9
+pin "house", to: "house.min.js"
+
+pin_all_from "app/javascript/actions", under: "actions"
+pin_all_from "app/javascript/controllers", under: "controllers"
+pin_all_from "app/javascript/helpers", under: "helpers"
+pin_all_from "app/javascript/lib", under: "lib"

config/initializers/active_storage.rb

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+ActiveSupport.on_load(:active_storage_blob) do
+  ActiveStorage::DiskController.after_action only: :show do
+    expires_in 1.year, public: true
+  end
+end

config/initializers/assets.rb

@@ -0,0 +1,7 @@
+# Be sure to restart your server when you modify this file.
+
+# Version of your assets, change this if you want to expire all your assets.
+Rails.application.config.assets.version = "1.0"
+
+# Add additional assets to the asset load path.
+# Rails.application.config.assets.paths << Emoji.images_path

config/initializers/content_security_policy.rb

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+# Be sure to restart your server when you modify this file.
+
+# Define an application-wide content security policy.
+# See the Securing Rails Applications Guide for more information:
+# https://guides.rubyonrails.org/security.html#content-security-policy-header
+
+# Rails.application.configure do
+#   config.content_security_policy do |policy|
+#     policy.default_src :self, :https
+#     policy.font_src    :self, :https, :data
+#     policy.img_src     :self, :https, :data
+#     policy.object_src  :none
+#     policy.script_src  :self, :https
+#     policy.style_src   :self, :https
+#     # Specify URI for violation reports
+#     # policy.report_uri "/csp-violation-report-endpoint"
+#   end
+#
+#   # Generate session nonces for permitted importmap, inline scripts, and inline styles.
+#   config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
+#   config.content_security_policy_nonce_directives = %w(script-src style-src)
+#
+#   # Report violations without enforcing the policy.
+#   # config.content_security_policy_report_only = true
+# end

config/initializers/enable_yjit.rb

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+# Automatically enable YJIT as of Ruby 3.3, as it brings very
+# sizeable performance improvements.
+
+# If you are deploying to a memory constrained environment
+# you may want to delete this file, but otherwise it's free
+# performance.
+if defined? RubyVM::YJIT.enable
+  Rails.application.config.after_initialize do
+    RubyVM::YJIT.enable
+  end
+end

config/initializers/extensions.rb

@@ -0,0 +1 @@
+Dir["#{Rails.root}/lib/rails_ext/*"].each { |path| require "rails_ext/#{File.basename(path)}" }

config/initializers/filter_parameter_logging.rb

@@ -0,0 +1,8 @@
+# Be sure to restart your server when you modify this file.
+
+# Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
+# Use this to limit dissemination of sensitive information.
+# See the ActiveSupport::ParameterFilter documentation for supported notations and behaviors.
+Rails.application.config.filter_parameters += [
+  :passw, :email, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn
+]

config/initializers/inflections.rb

@@ -0,0 +1,3 @@
+ActiveSupport::Inflector.inflections(:en) do |inflect|
+  inflect.irregular "leaf", "leaves"
+end

config/initializers/markdown.rb

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+ActiveSupport.on_load :action_text_markdown do
+  require "markdown_renderer"
+  ActionText::Markdown.renderer = -> {  MarkdownRenderer.build }
+end

config/initializers/permissions_policy.rb

@@ -0,0 +1,13 @@
+# Be sure to restart your server when you modify this file.
+
+# Define an application-wide HTTP permissions policy. For further
+# information see: https://developers.google.com/web/updates/2018/06/feature-policy
+
+# Rails.application.config.permissions_policy do |policy|
+#   policy.camera      :none
+#   policy.gyroscope   :none
+#   policy.microphone  :none
+#   policy.usb         :none
+#   policy.fullscreen  :self
+#   policy.payment     :self, "https://secure.example.com"
+# end

config/initializers/sqlite3.rb

@@ -0,0 +1,17 @@
+module SQLite3Configuration
+  private
+    def configure_connection
+      super
+
+      if @config[:retries]
+        retries = self.class.type_cast_config_to_integer(@config[:retries])
+        raw_connection.busy_handler do |count|
+          (count <= retries).tap { |result| sleep count * 0.001 if result }
+        end
+      end
+    end
+end
+
+ActiveSupport.on_load :active_record do
+  ActiveRecord::ConnectionAdapters::SQLite3Adapter.prepend SQLite3Configuration
+end

config/initializers/version.rb

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+Rails.application.config.app_version = ENV.fetch("APP_VERSION", "0")
+Rails.application.config.git_revision = ENV["GIT_REVISION"]

config/locales/en.yml

@@ -0,0 +1,31 @@
+# Files in the config/locales directory are used for internationalization and
+# are automatically loaded by Rails. If you want to use locales other than
+# English, add the necessary files in this directory.
+#
+# To use the locales, use `I18n.t`:
+#
+#     I18n.t "hello"
+#
+# In views, this is aliased to just `t`:
+#
+#     <%= t("hello") %>
+#
+# To use a different locale, set it with `I18n.locale`:
+#
+#     I18n.locale = :es
+#
+# This would use the information in config/locales/es.yml.
+#
+# To learn more about the API, please read the Rails Internationalization guide
+# at https://guides.rubyonrails.org/i18n.html.
+#
+# Be aware that YAML interprets the following case-insensitive strings as
+# booleans: `true`, `false`, `on`, `off`, `yes`, `no`. Therefore, these strings
+# must be quoted to be interpreted as strings. For example:
+#
+#     en:
+#       "yes": yup
+#       enabled: "ON"
+
+en:
+  hello: "Hello world"

config/puma.rb

@@ -0,0 +1,18 @@
+threads_count = ENV.fetch("RAILS_MAX_THREADS", 3)
+threads threads_count, threads_count
+
+rails_env = ENV.fetch("RAILS_ENV", "development")
+environment rails_env
+
+case rails_env
+when "production"
+  workers_count = Integer(ENV.fetch("WEB_CONCURRENCY") { (Concurrent.processor_count * 0.666).ceil })
+  workers workers_count if workers_count > 1
+
+  preload_app!
+when "development"
+  worker_timeout 3600 # Don't let worker die during debugger session
+end
+
+port ENV.fetch("PORT", 3000)
+plugin :tmp_restart

config/redis.conf

@@ -0,0 +1,4 @@
+port 6379
+daemonize no
+appendonly no
+save ""

config/resque-pool.yml

@@ -0,0 +1 @@
+default: <%= (Concurrent.processor_count * 0.5).ceil %>

config/routes.rb

@@ -0,0 +1,77 @@
+Rails.application.routes.draw do
+  root "books#index"
+
+  resource :first_run, only: %i[ show create ]
+
+  resource :session, only: %i[ new create destroy ] do
+    scope module: "sessions" do
+      resources :transfers, only: %i[ show update ]
+    end
+  end
+
+  get "join/:join_code", to: "users#new", as: :join
+  post "join/:join_code", to: "users#create"
+
+  resource :account do
+    scope module: "accounts" do
+      resource :join_code, only: :create
+      resource :custom_styles, only: %i[ edit update ]
+    end
+  end
+
+  resources :books, except: %i[ index show ] do
+    resource :publication, controller: "books/publications", only: %i[ show edit update ]
+    resource :bookmark, controller: "books/bookmarks", only: :show
+
+    scope module: "books" do
+      namespace :leaves do
+        resources :moves, only: :create
+      end
+    end
+
+    resources :sections
+    resources :pictures
+    resources :pages
+  end
+
+  get "/:id/:slug", to: "books#show", constraints: { id: /\d+/ }, as: :slugged_book
+  get "/:book_id/:book_slug/:id/:slug", to: "leafables#show", constraints: { book_id: /\d+/, id: /\d+/ }, as: :slugged_leafable
+
+  direct :book_slug do |book, options|
+    route_for :slugged_book, book, book.slug, options
+  end
+
+  direct :leafable_slug do |leaf, options|
+    route_for :slugged_leafable, leaf.book, leaf.book.slug, leaf, leaf.slug, options
+  end
+
+  resources :pages, only: [] do
+    scope module: "pages" do
+      resources :edits, only: :show
+    end
+  end
+
+  resources :qr_code, only: :show
+  resources :users do
+    scope module: "users" do
+      resource :profile
+    end
+  end
+
+  direct :leafable do |leaf, options|
+    route_for "book_#{leaf.leafable_name}", leaf.book, leaf, options
+  end
+
+  direct :edit_leafable do |leaf, options|
+    route_for "edit_book_#{leaf.leafable_name}", leaf.book, leaf, options
+  end
+
+  namespace :action_text, path: nil do
+    get "/u/*slug" => "markdown/uploads#show", as: :markdown_upload
+    post "/uploads" => "markdown/uploads#create", as: :markdown_uploads
+  end
+
+  get "up" => "rails/health#show", as: :rails_health_check
+  get "service-worker" => "rails/pwa#service_worker", as: :pwa_service_worker
+  get "manifest" => "rails/pwa#manifest", as: :pwa_manifest
+end

config/storage.yml

@@ -0,0 +1,35 @@
+test:
+  service: Disk
+  root: <%= Rails.root.join("tmp/storage") %>
+
+local:
+  service: Disk
+  root: <%= Rails.root.join("storage", "files") %>
+  public: true
+
+# Use bin/rails credentials:edit to set the AWS secrets (as aws:access_key_id|secret_access_key)
+# amazon:
+#   service: S3
+#   access_key_id: <%= Rails.application.credentials.dig(:aws, :access_key_id) %>
+#   secret_access_key: <%= Rails.application.credentials.dig(:aws, :secret_access_key) %>
+#   region: us-east-1
+#   bucket: your_own_bucket-<%= Rails.env %>
+
+# Remember not to checkin your GCS keyfile to a repository
+# google:
+#   service: GCS
+#   project: your_project
+#   credentials: <%= Rails.root.join("path/to/gcs.keyfile") %>
+#   bucket: your_own_bucket-<%= Rails.env %>
+
+# Use bin/rails credentials:edit to set the Azure Storage secret (as azure_storage:storage_access_key)
+# microsoft:
+#   service: AzureStorage
+#   storage_account_name: your_account_name
+#   storage_access_key: <%= Rails.application.credentials.dig(:azure_storage, :storage_access_key) %>
+#   container: your_container_name-<%= Rails.env %>
+
+# mirror:
+#   service: Mirror
+#   primary: local
+#   mirrors: [ amazon, google, microsoft ]