Gives free access to the On Demand collection. Each customer must include the email and the end date.

free_on_demand_access.rb

def free_on_demand_access (on_demand_collection_id, customers)
  collection = OnDemandCollection.find(on_demand_collection_id)
  return "Invalid collection" if collection.nil?
  
  ActiveRecord::Base.transaction do 
    customers.each do |customer|
      user = User.find_by(email: customer[:email])
      return "Invalid user email #{customer[:email]}" if user.nil?
      return "Invalid finish date for #{customer[:email]}" if customer[:finish_date].nil?

      OnDemandCollectionCustomer.create!(
        user_id: user.id,
        on_demand_collection_id: collection.id,
        source: user,
        start_date: DateTime.now,
        finish_date: customer[:finish_date]
      )
    end
  end
  
end