Delay Henka

# copy over migrations
`bundle exec rails delay_henka:install:migrations`
`bundle exec rails db:migrate`

# config/routes.rb
mount DelayHenka::Engine, at: '/delay_henka'

# Create an initilazer delay_henka.rb
DelayHenka.setup do |config|
  # Sets the base controller of the engine views
  config.base_view_controller = 'Backend::BaseController'
end

# In your model that you want to have delayed updates,
class SomeModel < ApplicationRecord
  # This gives instances of this class `#upcoming_changes` association with staged ScheduledChange
  include DelayHenka::Model
end

# In your controller (or factory service),
class SomeController
  def update
    @product = SomeModel.find(params[:id])
    delayed_changes = some_params.extract!(:discount_pct, :price)
    if @product.update some_params.except(:discount_pct, :price)
      result = DelayHenka::ScheduledChange.schedule(record: @product, changes: delayed_changes, by_email: current_user.email, time_zone: Time.zone.name)
      if result.ok? # returns a Keka object
        redirect_to #..., success
      else
        # no change is scheduled. display error and have user try again.
        flash.now[:error] = result.msg
        render :edit
      end
    else
      render :edit
    end
  end
end

# To view scheduled changes associated with a record,
# some_view.html.haml
- if @product.upcoming_changes.any?
  = render 'delay_henka/web/admin/scheduled_changes/summary_table', scheduled_changes: @product.upcoming_changes

# To view all scheduled changes, use this link:
delay_henka.web_admin_scheduled_changes_path

# To schedule the worker that applies all changes
# and actions based on time zone, in your
# sidekiq config/schedule.yml,
apply_scheduled_changes_and_actions:
  cron: "0 * * * *"
  class: DelayHenka::UpdatesOnValidTimeZonesWorker
  queue: default

gem 'delay_henka'