Ruby Fundamental - Usando recursividade para alterar valores de hash

recursividade_hash_01.xml

<transaction>
  <id>456</id>
  <status>Aprovada</status>
  <order_number>F2457</order_number>
  <price>33.21</price>
  <date_transaction>2012-12-13T12:35:30</date_transaction>
  <date_release></date_release>
  <payment>
    <payment_method>Mastercard</payment_method>
    <date_approval>2012-12-13T12:35:31</date_approval>
    <date_payment>2012-12-13T12:35:31</date_payment>
    <tid>1355409331</tid>
  </payment>
  <customer>
    <name>Pedro Bonamides</name>
    <email>pedro@bo.com.br</email>
    <date_birth>1910-09-01</date_birth>
  </customer>
</transaction>

recursividade_hash_02.rb

hash = { 
  "transaction" => { 
    "id" => "456",
    "status" => "Aprovada",
    "order_number" => "F2457",
    "price" => "33.21",
    "date_transaction" => "2012-12-13T12:35:30",
    "date_release" => nil,
    "payment" => {
      "payment_method" => "Mastercard",
      "date_approval" => "2012-12-13T12:35:31",
      "date_payment" => "2012-12-13T12:35:31",
      "tid" => "1355409331"
    },
    "customer" => {
      "name" => "Pedro Bonamides",
      "email" => "pedro@bo.com.br",
      "date_birth" => "1910-09-01"
    }
  }
}

recursividade_hash_03.rb

require 'active_support/core_ext'

hash["transaction"]["date_transaction"].class # => String
hash["transaction"]["date_transaction"]       # => 2012-12-13T12:35:30

hash["transaction"]["date_transaction"] = hash["transaction"]["date_transaction"].to_time

hash["transaction"]["date_transaction"].class # => Time
hash["transaction"]["date_transaction"]       # => 2012-12-13 12:35:30 UTC

recursividade_hash_04.rb

require 'active_support/core_ext'

def date_to_time!(hash)
  hash.each do |key, value|
    if key.to_s.starts_with?("date_") && value
      puts "Converting #{key}"
      hash[key] = (value.to_time rescue value) || value
    end
  end
end

recursividade_hash_05.rb

date_to_time! hash["transaction"]
# => "Converting date_transaction"

hash["transaction"]["date_transaction"].class         # => Time
hash["transaction"]["date_release"].class             # => NilClass 
hash["transaction"]["payment"]["date_approval"].class # => String
hash["transaction"]["payment"]["date_payment"].class  # => String
hash["transaction"]["customer"]["date_birth"].class   # => String

recursividade_hash_06.rb

require 'active_support/core_ext'

def date_to_time!(hash)
  hash.each do |key, value|
    date_to_time!(value) if value.is_a?(Hash)

    if key.to_s.starts_with?("date_") && value
      puts "Converting #{key}"
      hash[key] = (value.to_time rescue value) || value
    end
  end
end

recursividade_hash_07.rb

date_to_time! hash
# => Converting date_transaction
# => Converting date_approval
# => Converting date_payment
# => Converting date_birth

hash["transaction"]["date_transaction"].class         # => Time
hash["transaction"]["date_release"].class             # => NilClass 
hash["transaction"]["payment"]["date_approval"].class # => Time
hash["transaction"]["payment"]["date_payment"].class  # => Time
hash["transaction"]["customer"]["date_birth"].class   # => Time

recursividade_hash_08.rb

hash = { 
  "transaction" => { 
    "id" => "456",
    "status" => "Aprovada",
    "order_number" => "F2457",
    "price" => "33.21",
    "date_transaction" => "2012-12-13T12:35:30",
    "date_release" => nil,
    "payment" => {
      "payment_method" => "Mastercard",
      "date_approval" => "2012-12-13T12:35:31",
      "date_payment" => "2012-12-13T12:35:31",
      "tid" => "1355409331"
    },
    "customer" => {
      "name" => "Pedro Bonamides",
      "email" => "pedro@bo.com.br",
      "date_birth" => "1910-09-01",
      "fake" => {
        "date_fake" => "2012-12-17"
      }
    }
  }
}

date_to_time! hash
# => Converting date_transaction
# => Converting date_approval
# => Converting date_payment
# => Converting date_birth
# => Converting date_fake

hash["transaction"]["date_transaction"].class              # => Time
hash["transaction"]["date_release"].class                  # => NilClass 
hash["transaction"]["payment"]["date_approval"].class      # => Time
hash["transaction"]["payment"]["date_payment"].class       # => Time
hash["transaction"]["customer"]["date_birth"].class        # => Time
hash["transaction"]["customer"]["fake"]["date_fake"].class # => Time

recursividade_hash_09.rb

require 'active_support/core_ext'

class HashConverter
  def self.date_to_time!(hash)
    hash.each do |key, value|
      date_to_time!(value) if value.is_a?(Hash)
  
      if key.to_s.starts_with?("date_") && value
        puts "Converting #{key}"
        hash[key] = (value.to_time rescue value) || value
      end
    end
  end
end

hash = { 
  "transaction" => { 
    "id" => "456",
    "status" => "Aprovada",
    "order_number" => "F2457",
    "price" => "33.21",
    "date_transaction" => "2012-12-13T12:35:30",
    "date_release" => nil,
    "payment" => {
      "payment_method" => "Mastercard",
      "date_approval" => "2012-12-13T12:35:31",
      "date_payment" => "2012-12-13T12:35:31",
      "tid" => "1355409331"
    },
    "customer" => {
      "name" => "Pedro Bonamides",
      "email" => "pedro@bo.com.br",
      "date_birth" => "1910-09-01",
      "fake" => {
        "date_fake" => "2012-12-17"
      }
    }
  }
}

HashConverter.date_to_time! hash
# => Converting date_transaction
# => Converting date_approval
# => Converting date_payment
# => Converting date_birth
# => Converting date_fake

hash["transaction"]["date_transaction"].class              # => Time
hash["transaction"]["date_release"].class                  # => NilClass 
hash["transaction"]["payment"]["date_approval"].class      # => Time
hash["transaction"]["payment"]["date_payment"].class       # => Time
hash["transaction"]["customer"]["date_birth"].class        # => Time
hash["transaction"]["customer"]["fake"]["date_fake"].class # => Time