Module: Greenwich::Conversion::ClassMethods

Defined in:
lib/greenwich/conversion.rb

Instance Method Summary collapse

Instance Method Details

#time_with_time_zone(utc_time_field, options = {}) ⇒ Object 



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# File 'lib/greenwich/conversion.rb', line 6

def time_with_time_zone(utc_time_field, options = {})
  time_field      = utc_time_field.to_s.gsub /_utc$/, ''
  date_field      = time_field.gsub(/_at\Z/, '_on')
  time_zone_field = options[:time_zone] || "#{time_field}_time_zone"

  class_eval do
    columns_hash[time_field] = ActiveRecord::ConnectionAdapters::Column.new(time_field, nil, "datetime")
  end

  define_method "#{time_field}_utc=" do |value|
    greenwich_time_fields_converted["#{time_field}_utc"] = true

    write_attribute("#{time_field}_utc", value)
  end

  define_method time_field do
    time_zone = Greenwich::Utilities.get_time_zone(self, time_zone_field)
    time      = send(utc_time_field)
    time      = time.in_time_zone(time_zone) if time && time_zone

    time
  end

  define_method "#{time_field}=" do |value|
    time_zone = Greenwich::Utilities.get_time_zone(self, time_zone_field)
    time      = Greenwich::Utilities.coerce_to_time_without_zone(value)
    time      = ActiveSupport::TimeWithZone.new(nil, time_zone, time) if time && time_zone
    time      = ActiveSupport::TimeWithZone.new(nil, ActiveSupport::TimeZone.new('UTC'), time) if time && !time_zone

    greenwich_time_fields_converted["#{time_field}_utc"] = true unless time_zone.nil?

    write_attribute(utc_time_field, time)
  end

  define_method date_field do
    return nil unless send(:"#{time_field}").respond_to? :to_date

    send(:"#{time_field}").to_date
  end

  time_zone time_zone_field.to_sym, :for => utc_time_field.to_sym
end

#time_zone(name, options = {}) ⇒ Object 



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# File 'lib/greenwich/conversion.rb', line 49

def time_zone(name, options = {})
  associated_time_fields = Array.wrap(options[:for]).map {|f| f.to_s.gsub /_utc$/, ''}

  define_method name do
    time_zone_name = read_attribute(name)

    Greenwich::Utilities.coerce_to_time_zone(time_zone_name)
  end

  define_method "#{name}=" do |value|
    time_zone = Greenwich::Utilities.coerce_to_time_zone_name(value)
    write_attribute(name, time_zone)

    associated_time_fields.each do |time_field|
      if greenwich_time_field_needs_conversion?(time_field, name)
        send("#{time_field}=".to_sym, send("#{time_field}_utc"))

        greenwich_time_fields_converted["#{time_field}_utc"] = true
      end
    end
  end
end