Module: SimpleRecord::Translations

Included in:
Base
Defined in:
lib/simple_record/translations.rb

Constant Summary collapse

@@offset = 
9223372036854775808
@@padding = 
20
@@date_format = 
"%Y-%m-%dT%H:%M:%S"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.decrypt(value, key = nil) ⇒ Object

Raises:



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# File 'lib/simple_record/translations.rb', line 240

def self.decrypt(value, key=nil)
#            puts "decrypt orig value #{value} "
  unencoded_value = Base64.decode64(value)
  raise SimpleRecordError, "Encryption key must be defined on the attribute." if key.nil?
  key             = key || get_encryption_key()
#            puts "decrypting #{unencoded_value} "
  decrypted_value = SimpleRecord::Encryptor.decrypt(:value => unencoded_value, :key => key)
#             "decrypted #{unencoded_value} to #{decrypted_value}"
  decrypted_value
end

.encrypt(value, key = nil) ⇒ Object

Raises:



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# File 'lib/simple_record/translations.rb', line 231

def self.encrypt(value, key=nil)
  key = key || get_encryption_key()
  raise SimpleRecordError, "Encryption key must be defined on the attribute." if key.nil?
  encrypted_value = SimpleRecord::Encryptor.encrypt(:value => value, :key => key)
  encoded_value   = Base64.encode64(encrypted_value)
  encoded_value
end

.from_float(x) ⇒ Object

This conversion to a string is based on: tools.ietf.org/html/draft-wood-ldapext-float-00 Java code sample is here: code.google.com/p/typica/source/browse/trunk/java/com/xerox/amazonws/simpledb/DataUtils.java



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# File 'lib/simple_record/translations.rb', line 163

def self.from_float(x)
  return x
#            if x == 0.0
#                return "3 000 0.0000000000000000"
#            end
end

.pad_and_offset(x, att_meta = nil) ⇒ Object

Change name to something more appropriate like ruby_to_sdb



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# File 'lib/simple_record/translations.rb', line 129

def self.pad_and_offset(x, att_meta=nil) # Change name to something more appropriate like ruby_to_sdb
  # todo: add Float, etc
  #    puts 'padding=' + x.class.name + " -- " + x.inspect
  if x.kind_of? Integer
    x     += @@offset
    x_str = x.to_s
    # pad
    x_str = '0' + x_str while x_str.size < 20
    return x_str
  elsif x.respond_to?(:iso8601)
    #  puts x.class.name + ' responds to iso8601'
    #
    # There is an issue here where Time.iso8601 on an incomparable value to DateTime.iso8601.
    # Amazon suggests: 2008-02-10T16:52:01.000-05:00
    #                  "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
    #
    if x.is_a? DateTime
      x_str = x.getutc.strftime(@@date_format)
    elsif x.is_a? Time
      x_str = x.getutc.strftime(@@date_format)
    elsif x.is_a? Date
      x_str = x.strftime(@@date_format)

    end
    return x_str
  elsif x.is_a? Float
    from_float(x)
  else
    return x
  end
end

.pass_hash(value) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 271

def self.pass_hash(value)
  hashed        = Password::create_hash(value)
  encoded_value = Base64.encode64(hashed)
  encoded_value
end

.pass_hash_check(value, value_to_compare) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 277

def self.pass_hash_check(value, value_to_compare)
  unencoded_value = Base64.decode64(value)
  return Password::check(value_to_compare, unencoded_value)
end

.un_offset_int(x) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 200

def self.un_offset_int(x)
  if x.is_a?(String)
    x2 = x.to_i
#            puts 'to_i=' + x2.to_s
    x2 -= @@offset
#            puts 'after subtracting offset='+ x2.to_s
    x2
  else
    x
  end
end

Instance Method Details

#convert_dates_to_sdb ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 263

def convert_dates_to_sdb()

#            defined_attributes_local.each_pair do |name, att_meta|
#          puts 'int encoding: ' + i.to_s

#            end
end

#pad_and_offset_ints_to_sdb ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 252

def pad_and_offset_ints_to_sdb()

#            defined_attributes_local.each_pair do |name, att_meta|
#                if att_meta.type == :int && !self[name.to_s].nil?
#                    arr = @attributes[name.to_s]
#                    arr.collect!{ |x| self.class.pad_and_offset(x) }
#                    @attributes[name.to_s] = arr
#                end
#            end
end

#ruby_to_sdb(name, value) ⇒ Object

Time to second precision



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# File 'lib/simple_record/translations.rb', line 22

def ruby_to_sdb(name, value)
  return nil if value.nil?
  name     = name.to_s
#            puts "Converting #{name} to sdb value=#{value}"
#            puts "atts_local=" + defined_attributes_local.inspect

  att_meta = get_att_meta(name)

  if value.is_a? Array
    ret = value.collect { |x| ruby_to_string_val(att_meta, x) }
  else
    ret = ruby_to_string_val(att_meta, value)
  end

  unless value.blank?
    if att_meta.options
      if att_meta.options[:encrypted]
#                    puts "ENCRYPTING #{name} value #{value}"
        ret = Translations.encrypt(ret, att_meta.options[:encrypted])
#                    puts 'encrypted value=' + ret.to_s
      end
      if att_meta.options[:hashed]
#                        puts "hashing #{name}"
        ret = Translations.pass_hash(ret)
#                        puts "hashed value=" + ret.inspect
      end
    end
  end

  return ret

end

#ruby_to_string_val(att_meta, value) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 9

def ruby_to_string_val(att_meta, value)
  if att_meta.type == :int
    ret = Translations.pad_and_offset(value, att_meta)
  elsif att_meta.type == :date
    ret = Translations.pad_and_offset(value, att_meta)
  else
    ret = value.to_s
  end
  ret
end

#sdb_to_ruby(name, value) ⇒ Object

Convert value from SimpleDB String version to real ruby value.



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# File 'lib/simple_record/translations.rb', line 57

def sdb_to_ruby(name, value)
#            puts 'sdb_to_ruby arg=' + name.inspect + ' - ' + name.class.name + ' - value=' + value.to_s
  return nil if value.nil?
  att_meta = get_att_meta(name)

  if att_meta.options
    if att_meta.options[:encrypted]
      value = Translations.decrypt(value, att_meta.options[:encrypted])
    end
    if att_meta.options[:hashed]
      return PasswordHashed.new(value)
    end
  end


  if !has_id_on_end(name) && att_meta.type == :belongs_to
    class_name = att_meta.options[:class_name] || name.to_s[0...1].capitalize + name.to_s[1...name.to_s.length]
    # Camelize classnames with underscores (ie my_model.rb --> MyModel)
    class_name = class_name.camelize
    #      puts "attr=" + @attributes[arg_id].inspect
    #      puts 'val=' + @attributes[arg_id][0].inspect unless @attributes[arg_id].nil?
    ret        = nil
    arg_id     = name.to_s + '_id'
    arg_id_val = send("#{arg_id}")
    if arg_id_val
      if !cache_store.nil?
#                        arg_id_val = @attributes[arg_id][0]
        cache_key = self.class.cache_key(class_name, arg_id_val)
#          puts 'cache_key=' + cache_key
        ret       = cache_store.read(cache_key)
#          puts 'belongs_to incache=' + ret.inspect
      end
      if ret.nil?
        to_eval = "#{class_name}.find('#{arg_id_val}')"
#      puts 'to eval=' + to_eval
        begin
          ret = eval(to_eval) # (defined? #{arg}_id)
        rescue SimpleRecord::ActiveSdb::ActiveSdbError => ex
          if ex.message.include? "Couldn't find"
            ret = RemoteNil.new
          else
            raise ex
          end
        end

      end
    end
    value = ret
  else
    if value.is_a? Array
      value = value.collect { |x| string_val_to_ruby(att_meta, x) }
    else
      value = string_val_to_ruby(att_meta, value)
    end
  end
  value
end

#string_val_to_ruby(att_meta, value) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 115

def string_val_to_ruby(att_meta, value)
  if att_meta.type == :int
    value = Translations.un_offset_int(value)
  elsif att_meta.type == :date
    value = to_date(value)
  elsif att_meta.type == :boolean
    value = to_bool(value)
  elsif att_meta.type == :float
    value = Float(value)
  end
  value
end

#to_bool(x) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 192

def to_bool(x)
  if x.is_a?(String)
    x == "true" || x == "1"
  else
    x
  end
end

#to_date(x) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 184

def to_date(x)
  if x.is_a?(String)
    DateTime.parse(x)
  else
    x
  end
end

#unpad(i, attributes) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 212

def unpad(i, attributes)
  if !attributes[i].nil?
#          puts 'before=' + self[i].inspect
    attributes[i].collect! { |x|
      un_offset_int(x)

    }
  end
end

#unpad_self ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 222

def unpad_self
  defined_attributes_local.each_pair do |name, att_meta|
    if att_meta.type == :int
      unpad(name, @attributes)
    end
  end
end

#wrap_if_required(arg, value, sdb_val) ⇒ Object 



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# File 'lib/simple_record/translations.rb', line 171

def wrap_if_required(arg, value, sdb_val)
  return nil if value.nil?

  att_meta = defined_attributes_local[arg.to_sym]
  if att_meta && att_meta.options
    if att_meta.options[:hashed]
#                    puts 'wrapping ' + arg_s
      return PasswordHashed.new(sdb_val)
    end
  end
  value
end